Abstract: An image alignment guide for producing images for producing a knee brace has an arm carrying a focal angle tube, a mechanism for positioning the arm against the lateral side of the leg of a patient, and a mechanism for setting the level of the brace. The guide is used in method of preparing such images involving taking images with the image alignment guide against the lateral side of a patient's leg at an anterior-posterior mid-line thereof with the focal angle tube at the side of the knee and at a distance therefrom, respectively, measuring the length of the patient's leg from the patella center to a position on the leg at which a shell of a brace to be produced is to be located, measuring the crest of the tibia using a tibial contour guide and sending all images, readings and measurements obtained to a knee brace manufacturer.

Abstract: A sensor system for performing gait analysis of a person includes a sensor system that includes a pair of sensor insoles that include a plurality of force sensors, an accelerometer, and a transmitter for transmitting data to a portable electronic device. A monitoring program operably installed on the portable electronic device performs the following steps: receiving a desired cadence; receiving the data from the sensor insoles; determining an actual cadence of the person's footsteps based upon the data received; and comparing the actual cadence with the desired cadence.

Abstract: Characteristics of a user's heart are detected. In accordance with an example embodiment, a ballistocardiogram (BCG) sensor is used to detect heart characteristics of a user, and provide a BCG output indicative of the detected heart characteristics. The BCG output is further processed using data from one or more additional sensors, such as to reduce noise and/or otherwise process the BCG signal to characterize the user's heart function.

Abstract: Methods and systems for determining the likelihood that a person is impaired, generally comprising gathering ambient data from sensors operably coupled to a primary measuring device (PMD), analyzing and/or identifying the ambient data, querying at least one database to identify baseline data regarding the person, and comparing the ambient data to the baseline data to determine the likelihood that the person is impaired. The methods and systems advantageously detect medical and/or cognitive impairment without the need for specialized devices, examination by specialists, consent of the person being evaluated, and compliance with recommendations to be examined, and may be applied to estimating the level of impairment of a person due to alcohol, drugs, exposure to toxic chemicals, changes to mental status, insufficient sleep, medical problems, changes to blood sugar levels, divided attention, vision changes, hearing changes, use of a mobile device while walking or operating a vehicle, and other factors.

Abstract: A method and system to deliver biomechanical feedback utilizes three major elements: (1) multiple hardware data capture devices, including optical motion capture, inertial measurement units, infrared scanning devices, and two-dimensional RGB consecutive image capture devices, (2) a cross-platform compatible physics engine compatible with optical motion capture, inertial measurement units, infrared scanning devices, and two-dimensional RGB consecutive image capture devices, and (3) interactive platforms and user-interfaces to deliver real-time feedback to motions of human subjects and any objects in their possession and proximity.

Abstract: Apparatus for testing hearing is arranged to deliver audio tones over the Internet to be output at a receiving station such as a user's computer. The apparatus firstly constructs audio tones for transmission out of sets of components recorded at different modulation levels for each frequency. This allows significantly finer control over the sound level of the audio tones at the receiving station than would normally be available at the receiving end. Secondly, the apparatus supports a feedback loop, based on a calibrated audio tone delivered for output at the receiving station and transmitted as audible sound back to the hearing test apparatus via a voice activated modem, the apparatus sending display data to the receiving station representing the sound level of that audible sound such that a user can adjust one or more parameters of the receiving station so as to bring the sound level of the audible sound, indicated by the display data, to a calibrated level.

Abstract: A reversible electric motor driven pump mounted within a housing with one end in communication and seals with the ear canal when inserted therein has a drive shall employing pump controls operably associated with the electric motor to selectively control the start, stop, operating speed, position and direction of the drive shaft in either a clockwise or counterclockwise direction to drive a rotating gear with lever structure configured to reciprocate when driven by the drive shaft to selectively compress the bellows and piston forcing air through a port to create positive pressure is the ear canal in one mode, and expand the bellows and harmonic piston to withdraw air from the ear canal and create negative pressure therein in another mode.

Abstract: A system and method for monitoring body chemistry of a user, the system comprising: a housing supporting: a microsensor comprising a first and second working electrode, a reference electrode, and a counter electrode, and configured to access interstitial fluid of the user, and an electronics subsystem comprising a signal conditioning module that receives a signal stream, from the microsensor, wherein the electronics subsystem is configured to detect an impedance signal derived from two of the first working electrode, the second working electrode, the reference electrode, and the counter electrode; and a processing subsystem comprising: a first module configured to generate an analysis indicative of an analyte parameter of the user and derived from the signal stream and the impedance signal, and a second module configured to transmit information derived from the analysis to the user, thereby facilitating monitoring of body chemistry of the user.

Abstract: Provided is a method of detecting infection in a wound caused by an infecting organism at a wound site. Also provided is a system for detecting an infection in a wound at a wound site. Additionally, a porous pad comprising luciferase is provided.

Abstract: A system and method for monitoring body chemistry of a user, the system comprising: a housing supporting: a microsensor comprising a first and second working electrode, a reference electrode, and a counter electrode, and configured to access interstitial fluid of the user, and an electronics subsystem comprising a signal conditioning module that receives a signal stream, from the microsensor, wherein the electronics subsystem is configured to detect an impedance signal derived from two of the first working electrode, the second working electrode, the reference electrode, and the counter electrode; and a processing subsystem comprising: a first module configured to generate an analysis indicative of an analyte parameter of the user and derived from the signal stream and the impedance signal, and a second module configured to transmit information derived from the analysis to the user, thereby facilitating monitoring of body chemistry of the user.

Abstract: The present application provides Ag/AgCl based reference electrodes having an extended lifetime that are suitable for use in long term amperometric sensors. Electrochemical sensors equipped with reference electrodes described herein demonstrate considerable stability and extended lifetime in a variety of conditions.

Abstract: A calibration system is disclosed for calibrating a first physiological monitoring device using a second physiological monitoring device. The first physiological monitor measures a first indication of a physiological parameter. The second physiological monitor measures a second indication of the physiological parameter. The first and second indications are used to calibrate the first physiological monitoring device.

Abstract: According to various embodiments, a medical system and method for early detection of shock may include devices configured to provide information about multiple patient parameters. In certain embodiments, the system may receive input from a regional saturation sensor. Based on these inputs, the system may provide a diagnosis of shock and/or distinguish between various types of shock.

Abstract: An apparatus includes a housing, a fluid reservoir, a flow control mechanism, and an actuator. The housing defines an inner volume and has an inlet port that can be fluidically coupled to a patient and an outlet port. The fluid reservoir is disposed in the inner volume to receive and isolate a first volume of a bodily-fluid. The flow control mechanism is rotatable in the housing from a first configuration, in which a first lumen places the inlet port is in fluid communication with the fluid reservoir, and a second configuration, in which a second lumen places the inlet port in fluid communication with the outlet port. The actuator is configured to create a negative pressure in the fluid reservoir and is configured to rotate the flow control mechanism from the first configuration to the second configuration after the first volume of bodily-fluid is received in the fluid reservoir.

Abstract: Embodiments of the invention relate to a self-contained kit for medical condition monitoring and maintenance, such as the monitoring and maintenance of blood sugar levels. The kit is compact and includes components structurally retained therein for use without removal, wherein these components are normally separate and loose. Such components could include a glucose meter, an insulin pen and a lancing apparatus. Other embodiments of the invention relate to a computer system and method for monitoring a medical condition, monitoring a medical condition over time, correlating recorded results with environmental factors such as location, time and meals consumed. A method may also enable individual users to share information to provide support to one another.

Abstract: A needle safety assembly comprising a needle and a protective cover for the needle, wherein the needle is attached to a needle hub having wings on opposite sides which can be moved relative to the protective cover from a position of use where the tip of the needle is outside of the protective cover into a retracted position in which the needle is fully received in the protective cover. The protective cover is of generally tubular shape having two opposite axial slots extending from a distal end of the protective cover towards a tubular base portion of the protective cover. The slots are adapted to receive the wings when the needle hub moves into the protective cover. Also provided is a locking mechanism adapted to secure the needle hub inside the protective cover when the needle hub is retracted.

Abstract: Needle support assembly for a venous blood collection device with evacuated vial, comprising a support body having a coupling seat for a vein needle and coupling seat for a vial needle. The support body is provided with an inner chamber having an entrance and an exit. The support body is made at least partially in transparent or semi-transparent material to permit the visualization of the blood flow. The inner chamber has a mean cross-section greater than the cross-sections of both the coupling seats and is divided into compartments communicating with each other which define one or more channels for the blood flow from the entrance to the exit. Each channel defines a path for the blood which moves away from the entrance to the exit. Each channel defines a path for the blood which moves away from the straight line connecting the entrance and the exit and has a smaller cross-section than the mean cross-section of the inner chamber.

Abstract: A system evaluates a patient for a physiological abnormality. A urinary catheter is insertable within a patient's bladder and has a first pressure sensor for measuring bladder pressure and a second pressure sensor for measuring mid-urethral pressure at the mid-urethral sphincter. A processing device is connected to the first and second pressure sensors and configured to receive the measured bladder pressure and measured mid-urethral pressure during at least one breath cycle and process the data representative of the bladder and mid-urethral pressures obtained during the at least one breath cycle to diagnose a physiological abnormality within the patient.

Abstract: A leg movement acquisition unit 1 continuously acquires leg movements of a sleeping subject. An apnea detection unit 2 detects whether or not the subject is in a state of apnea. A movement analysis unit 3 determines whether or not the detected leg movement satisfies previously determined conditions. These previously determined conditions include at least the following conditions (a) to (d): (a) The duration of leg movement is within a previously determined range; (b) intensity of leg movement is a previously determined value or greater; (c) leg movements satisfying conditions (a) and (b) continue for a previously determined number of times within a previously determined duration; and (d) the leg movement is not movement from immediately before to immediately after an apnea state that has been detected by the apnea detection unit. A coefficient calculation unit 4 calculates a coefficient based on the number of times of leg movement that satisfied the previously determined conditions.

Abstract: A method and system for mobile behavioral treatment of sleep issues such as insomnia comprising of: placing, participants into an online software platform that includes an online coach and group/community to reinforce compliance and provide social support; providing, a curriculum, compromising of modules of evidence-based behavioral treatments (e.g.

Abstract: Control logic, device and method including same configured to receive at least one measured medical parameter of a patient; compare the at least one measured medical parameter to a predetermined first threshold value and to a predetermined second threshold value; trigger stimulation of the patient when the at least one measured medical parameter crosses the first threshold value; and trigger an alarm when the at least one measured medical parameter crosses the second threshold value.

Abstract: The invention provides a monitoring device for analysing a sleep condition of an individual. The device comprises at least a first motion sensor, a second motion sensor, and a processor. The first and second motion sensors are adapted to be positioned at an eyelid of the individual and to communicate a movement signal representing eye movement to the processor. The processor is adapted from the movement signal to provide an identifier significant for the sleep condition. The device may further comprise a tension sensor arranged to provide a tension signal based on sensed muscle tension in the eyelid. The motion sensors may comprises gyroscopes, accelerometers, or strain sensors.

Abstract: At least one embodiment of the disclosure is directed to a method for processing brainwave signals for treating a patient having neurological disorder or mental disorder or a combination of neurological and mental disorder. The method comprises: measuring a brainwave signal from the patient, the measured brainwave signal containing noise; denoising the brainwave signal to obtain a clean brainwave signal; matching the clean brainwave signal to a database of brainwave signals for neurological or mental conditions or a combination of neurological and mental conditions to identify the patient's neurological or mental status or a combination of neurological and mental conditions; and applying a therapeutic treatment to the patient based on the identified neurological or mental status or a combination of neurological and mental conditions.

Abstract: A body fat diagnostic apparatus, with which a change in the velocity of ultrasonic waves can be measured and fat can be diagnosed while suppressing the effects of a periodical change due to respiration and heartbeats of a subject, is formed of: a process unit for sequentially acquiring ultrasonic wave echo signals for a number of frames so as to form a group of B mode images; a data storage unit for storing the ultrasonic wave echo signals corresponding to the groups of B mode images; a sampling unit for sampling one frame as a standard image and another frame as a comparative image through the calculation of a cross correlation; and a velocity change analyzing unit for forming an image by calculating a change in the velocity of ultrasonic waves on the basis of the ultrasonic wave echo signals corresponding to the standard image and the comparative image.

Abstract: An insulation tube for an electric line for medical use, in particular a cardiac pacemaker electrode line, defibrillator electrode line, electric line for nerve stimulation, electric line in catheters, or the like, which, in order to better transmit tensile forces, includes a matrix consisting of resilient material and web-like elements consisting of rigid plastic material and embedded in the matrix, wherein the web-like elements run at least in portions along a helix line which forms an angle of at least 10° in relation to the longitudinal axis of the insulation tube. The invention further relates to a method for producing an insulation tube of this type and also to an electric line including comprising such an insulation tube.

Abstract: Anorectal diagnostic procedures are oftentimes carried out with the patient laying in the left decubitus position, which leads to non-representative response to test maneuvers due to the unnatural position and patient anxiety. Devices spanning, or fastened on, the interglutial cleft of a patient allow for a more natural patient position and eliminate non-representative responses.

Abstract: The present invention provides minimally invasive imaging probe/medical device having a frictional element integrated therewith for reducing non-uniform rotational distortion near the distal end of a medical device, such as an imaging probe which undergoes rational movement during scanning of surrounding tissue in bodily lumens and cavities.

Abstract: A catheter for measuring a flow of blood through a body tissue comprises a light emitter for emitting light into the body tissue and at least one light receiver for receiving light reflected in the body tissue and back to the catheter. The light emitter and the at least one light receiver are arranged in the catheter, wherein the catheter comprises a middle piece and a first and a second connection tube. The middle piece has a distal fastening piece for fastening to the first connection tube and a proximal fastening piece for fastening to the second connection tube, wherein the light emitter and the at least one light receiver are arranged in the middle piece.

Abstract: A method for physiological measurement and a portable electronic device adapted for executing the method. The portable electronic device includes a button and a display. The method for physiological measurement includes the following steps: transmitting at least one trigger signal when the button is pressed; transmitting a first optical signal towards the outside of the button through the button according to the trigger signal; receiving a second optical signal through the button; and obtaining physiological information according to the second optical signal, in which the second optical signal is an optical signal that is reflected when the first optical signal encounters an object.

Abstract: For repeatedly measuring signals from a fixed position of a tissue to monitor the blood composition, a subject adaptor is used to secure the subject position and a position fixing device uses a remote sensing tool to detect the subject position. The subject adaptor and the position fixing device are used to guide the moving of the subject relative to a position of the last measurement of a first signal analyzer. The signals can be from an aggregate of the designated composition with the other ingredients of the blood.

Abstract: A circuit for expanding a dynamic range. In one embodiment, the circuit includes: a transducer generating a signal current on an output terminal in response to a physical quantity, the signal current comprising an AC current and a DC current; a dynamic range enhancement circuit having a digital control signal input terminal and producing a variable opposition current in response to a digital signal applied to the digital control signal input terminal; an amplifier; an analog to digital converter in electrical communication with the amplifier; and a digital feedback circuit in communication with the output terminal of the analog to digital converter and in electrical communication with the digital control signal input terminal of the dynamic range enhancement circuit, wherein the opposition current from the dynamic range enhancement circuit is set substantially equal to the DC current portion of the signal current from the transducer.

Abstract: A system for managing care of a person includes one or more capacitors arranged to deliver a defibrillating shock to a patient; one or more electronic ports for receiving a plurality of signals from sensors for obtaining indications of an electrocardiogram (ECG) for the patient; and a patient treatment module executable on one or more computer processors using code stored in non-transitory media and arranged to identify a level of energy to be delivered in a shock to the patient by applying a mathematical computation to current ECG data from the patient and data indicating a present level of trans-thoracic impedance for the patient.

Abstract: An example system and method of reconstructing cardiac activation information are disclosed. In accordance therewith, there are accessed pairs of cardiac signals out of a plurality of cardiac signals obtained from a patient. The pairs have a first cardiac signal that is common among the pairs and second cardiac signals that are different among the pairs. The first cardiac signal and the second cardiac signals of the pairs are processed to identify points of change in the first cardiac signal at which a derivative of the first cardiac signal diverges with respect to derivatives of the second cardiac signals. An activation onset time is assigned at a point in the first cardiac signal based on correspondence of the points of change to define a cardiac activation indicating a beat.

Abstract: A wearable device, an electronic apparatus and a method for recording user actions are provided. The wearable device includes a body, at least one sensor and a memory module. An outer part of the body includes a surface, and an internal part includes an accommodating space. The sensor senses touching actions of a user to the surface, and records the location, the force and the number of the touching actions with respective to the surface, so as to form touching information corresponded to the touching actions. Thus, when the user is dressed the wearable device, the sensor senses and stores instinctive physical touching actions of the user relative to the user body covered by the wearable device, and the touching actions can become the basis of the diagnosis by the doctor.

Abstract: Systems and methods for generalized precursor pattern discovery that work with a wide range of biomedical signals and applications to detect a wide range of medical events are disclosed. In some embodiments, the methods and systems do not require domain-specific knowledge or significant reconfiguration based on the medical event being analyzed, hence it is also possible to discover patterns previously unknown to experts. In some embodiments, to build precursor pattern detection models, the system obtains annotated monitoring data. Positive and negative segments are extracted from the annotated monitoring data, and are preprocessed. Features are extracted from the preprocessed segments, and selected features are chosen from the extracted features. The selected features are classified to create the precursor pattern detection model The precursor pattern detection model may then be used in real time to detect occurrences of the medical event of interest.

Abstract: A health management system for displaying, on a screen, information based on vital data obtained from a subject includes: a vital data storage unit storing vital data history; a priority level information storage unit storing information specifying a priority level for each of additional information items; a receiving unit receiving an operation of defining a first region and a second region in the screen; a selecting unit selecting an additional information item to be displayed, based on the priority level information and a size of each of the first and second region; and a display unit displaying (i) the vital data history obtained for a predetermined period and (ii) on a position related to the second region when the operation is received, additional information of the selected additional information item which is related to the vital data history obtained for the period corresponding to the first region.

Abstract: A biological information measurement and display apparatus includes: a measuring unit measuring biological information; a first processor operating on a first operating system, and arithmetically processing the biological information measured by the measuring unit, to produce a calculation process signal; a second processor operating on a second operating system, being communicable with the first processor, and editing and processing the calculation process signal transmitted from the first processor, to produce an edition process signal; and an output controller receiving the calculation process signal produced by the first processor, and the edition process signal produced by the second processor, and outputting the received calculation process signal and the received edition process signal, the calculation process signal and the edition process signal output from the output controller being displayed in real time on a displaying unit.

Abstract: A system for managing care of a person receiving emergency cardiac assistance includes one or more capacitors arranged to deliver a defibrillating shock to a person; one or more electronic ports for receiving a plurality of signals from sensors for obtaining indications of an electrocardiogram (ECG) for the person; and a patient treatment module executable on one or more computer processors using code stored in non-transitory media and to provide a determination of a likelihood of success from delivering a future defibrillating shock to the person with the one or more capacitors, using a mathematical computation applied to a vector value defined by signals from at least two of the plurality of signals.

Abstract: A patient's vital sign measurements are displayed in a fishbone diagram defined by a horizontal line with a vertical line crossing it to form four compartments. The patient's respiratory rate and heart rate are displayed in assigned compartments above the horizontal line separated by the vertical line and the patient's oxygen saturation (SpO2) and temperature are displayed in assigned compartments below the horizontal line separated by vertical lines. Two diverging horizontal lines form a sideways “V” are connected with the right hand side of the horizontal line to define a fifth compartment in which the patient's blood pressure is displayed.

Abstract: An apparatus for cone beam computed tomography can include a support structure, a scanner assembly coupled to the support structure for controlled movement in at least x, y and z orientations, the scanner assembly can include a DR detector configured to move along at least a portion of a detector path that extends at least partially around a scan volume with a distance D1 that is sufficiently long to allow the scan volume to be positioned within the detector path; a radiation source configured to move along at least a portion of a source path outside the detector path, the source path having a distance D2 greater than the distance D1, the distance D2 being sufficiently long to allow adequate radiation exposure of the scan volume for an image capture by the detector; and a first gap in the detector path.

Abstract: Disclosed herein are methods, systems and therapeutics concerning radiotherapy of microscopic disease based on realtime imaging. The system comprises an intra-corporeal component and an extra-corporeal component. The intra-corporeal component comprises a detector/imaging subunit and a treatment subunit, where both subunits are placed in a cavity of a patient. The extra-corporeal component comprises a detector that is placed outside any cavity of the patient. Through this system, a treatment can be applied to a target tissue in a patient concurrently or within a short period time to signal detections.

Abstract: An imaging system comprises a plurality of imaging detectors for acquiring imaging data. The plurality of imaging detectors is configurable to be arranged proximate to an anatomy of interest within a patient. Each of the plurality of imaging detectors has a field of view (FOV) and at least a portion of the plurality of imaging detectors image the anatomy of interest within the respective FOV. A processor receives the imaging data and processes the imaging data to form a multi-dimensional dataset having at least three dimensions.

Abstract: A method for positioning an organ of interest within a field of view of an imaging detector includes positioning an organ of interest at an initial imaging position, performing automatic organ detection to determine a position of the organ, determining a revised imaging position of a detector or a table based on the position of the organ, prompting a user to accept the revised imaging position, and automatically repositioning at least one of the detector or the table to the revised imaging position based on a user input in response to the prompting. A patient positioning module and a medical imaging system are also described herein.

Abstract: The present invention provides a sheath for a disposable dental direct imaging digital device. The sheath for a disposable dental direct imaging digital device includes a bag structure that is made up of an elastic material, and is also made up of a positioning device that is placed in an opening of the bag structure. A direct imaging digital device may be inserted into the sheath. A first housing segment that is in connection with the opening exists on one end of the bag structure. The other end of the first housing segment is in connection with a second housing segment. A tapered channel is formed from the opening of the first housing segment towards the second housing segment. A positioning device may close or shrink the opening, so as to prevent the direct imaging digital device from sliding out of the sheath. The direct imaging digital device may be inserted into the first housing segment, and then may be inserted into the second housing segment.

Abstract: An apparatus is provided that includes a digital processing circuit to obtain a digital signal corresponding to an output signal of a photon-counting detector; determine, from the obtained digital signal, a plurality of X-ray photons received by the photon-counting detector during a measurement period; determine a corresponding energy level of each of the plurality of X-ray photons; determine, based on the corresponding energy level, a corresponding weight for each of the plurality of X-ray photons; and calculate a sum of the corresponding weights of the plurality of X-ray photons.

Abstract: A cassette holder of an imaging stand is provided with first and second catch members for catching and holding an electronic cassette from above and below. The first catch member has a multi connector connected to a multi terminal of the electronic cassette. The multi connector is offset with respect to a center line of an imaging surface of the cassette holder. The multi terminal is offset with respect to a center line of an irradiation surface of the electronic cassette in the same direction by the same amount as those of the multi connector. In a state where said electronic cassette mounted on a tray is loaded into the cassette holder, the center line of the irradiation surface coincides with the center line of the imaging surface.

Abstract: A method for representing a blood vessel including a thrombosed section of the blood vessel in a patient is provided. The method includes capturing a first volume data set after administration of a contrast agent, locating a proximal and/or distal end of the thrombosed section of the blood vessel with the aid of the first volume data set, and defining a data capture area for a second volume data set based on the proximal and/or distal end of the thrombosed section of the blood vessel that has been located. The method also includes capturing the second volume data set, segmenting the thrombosed section of the blood vessel from the second volume data set, capturing fluoroscopic images, and superimposing the segmented thrombosed section of the blood vessel with the fluoroscopic images.

Abstract: According to one embodiment, there is provided an X-ray diagnostic apparatus which comprises an X-ray generation unit configured to irradiate an object with X-rays; an X-ray detection unit configured to detect X-rays applied by the X-ray generation unit and transmitted through the object; an image generation unit configured to generate an X-ray image based on X-rays detected by the X-ray detection unit; a recording unit configured to record pressure data acquired by using a pressure sensor provided on a guide wire; a measurement position setting unit configured to set a measurement position for a pressure by the pressure sensor using the X-ray image; and a display unit configured to display the X-ray image almost in real time and superimpose and display the measurement position set by the measurement position setting unit.

Abstract: A breast tomography apparatus includes a gantry incorporating a radiation source and a radiation detector and a breast insert portion which is provided in the gantry and in which the breast as an imaging target is to be inserted. The breast tomography apparatus detects contact between an object and the gantry by using at least one contact detection sensor arranged on the gantry, and determines the insert condition of the breast into the breast insert portion based on the detection of contact between the object and the gantry by the contact detection sensor.

Abstract: Device (10; 30; 50; 70) for calibration of a quantitative computed tomography apparatus, which includes a body (12; 32; 52; 72) and several known-density elements (13; 33; 53; 73) attached to the body and made of different materials and in different densities from each other and different from the body. The body (12; 32; 52; 72) is configured to be placed in the mouth or on another part of a person's head, with the known-density elements (13; 33; 53; 73) arranged in the region of the person's teeth. The device enables a quantitative computed tomography apparatus to adjust its calculations so as to convert the radiodensity units of the tomographic image into bone mineral density units, by knowing the exact densities of certain points of the image, corresponding to the points where the known-density elements (13; 33; 53; 73) are located.