Abstract: A skin evaluation apparatus includes a shape information acquisition unit 22 that acquires information on a surface unevenness shape of the skin; an optical feature information acquisition unit 23 that acquires information on an optical feature of the skin; and an evaluation unit 24 that evaluates gloss of the skin on the basis of the information on the surface unevenness shape and the information on the optical feature.

Abstract: A photoacoustic device comprises a light source configured to generate first and second lights; an irradiation unit configured to generate a first acoustic wave from an object including a contrast agent by irradiating the object with the first light, and then bleach the contrast agent by irradiating the object with the second light and generate a second acoustic wave from the object by irradiating the object with the first light after bleaching; a receiving unit configured to output a first signal upon receiving the first acoustic wave and output a second signal upon receiving the second acoustic wave; and an acquisition unit configured to acquire first information based on the first signal, and acquire second information based on the second signal.

Abstract: An insertion needle includes an outer needle and an inner needle, and the inner needle includes a light emitting portion and a photoacoustic wave generating portion. An insertion and removal detection unit detects that the inner needle of the insertion needle has been removed from the outer needle. In a case where it is detected that the inner needle has been removed, a processing switching unit changes the image display so as to be different from the image display before it is detected that the inner needle has been removed.

Abstract: This optoacoustic imaging device is provided with: a light source part for irradiating an object to be inspected with light; an ultrasonic vibrator for detecting an acoustic wave generated from a subject to be detected in the object to be inspected which has absorbed the light emitted from the light source part; and a detecting part disposed in a probe body and including an acoustic lens disposed closer to the tip side of the probe body than the ultrasonic vibrator, wherein the acoustic lens is configured to have a light absorbance of 1-30% and a light reflectance of less than 85% with respect to light which has a wavelength band of 650-1000 nm and is emitted from the light source part.

Abstract: A computing device includes a thermal map generator (142) that generates a thermal map for image data voxels or pixels representing a volume or region of interest of a subject based on thermometry image data, which includes voxels or pixels indicating a change in a temperature in the volume or region of interest, and a predetermined change in value to temperature lookup table (144) and a display (145) that visually presents the thermal map in connection with image data of the volume of interest. A method includes generating a thermal map for image data voxels or pixels representing a volume or region of interest of a subject based on thermometry image data, which includes voxels or pixels indicating a change in a temperature in the volume or region of interest, and a predetermined change in voxel or pixel value to temperature lookup table.

Abstract: One method for assessing a vessel can include obtaining a set of first location pressure measurements at a first location in the vessel over a first time period and a set of second location pressure measurements at a second location in the vessel over the first time period. This method can further include identifying a first leading characteristic associated with one or more pressure measurements in the set of first location pressure measurements, a second leading characteristic associated with one or more pressure measurements in the set of second location pressure measurements, a first trailing characteristic associated with one or more pressure measurements in the set of first location pressure measurements, and a second trailing characteristic associated with one or more pressure measurements in the set of second location pressure measurements. And, this method can include calculating a pressure ratio using pressure measurements between the identified characteristics.

Abstract: A device for measuring a ventricular-arterial coupling of a subject includes first and second inputs. The first input receives signals from a plurality of electrocardiogram sensors that are coupled to the subject at a plurality of first locations. The second input receives signals from a plurality of photoplethysmogram sensors that are coupled to the subject at a plurality of second locations. The second locations are selected from the group consisting of a head of the subject, an arm of the subject, and a leg of the subject. The signals received from the electrocardiogram sensors and the signals received from the photoplethysmogram sensors are received simultaneously. The device also includes a monitor configured to display the signals from the electrocardiogram sensors and the signals from the photoplethysmogram sensors.

Abstract: A system for measuring the blood loss comprises a measuring device that determines a hemoglobin concentration of fluid within a container utilizing a light source and a light detector. The container receives blood and other fluids from a patient during a medical procedure. Light from the light source is passed through the blood and other fluids in the container and is detected by the light detector. Based upon a magnitude of light detected, a hemoglobin concentration of the fluid in the container can be determined. A volume-measuring device determines the volume of blood and fluid in the container. Knowing the hemoglobin concentration and volume of fluid in the container, the volume of patient blood loss in the container can be determined. The blood loss measuring device in combination with infusion systems maintains a real-blood volume status so that proper infusion of blood, crystalloid and/or colloid solutions occurs.

Abstract: Disclosed embodiments pertain to cardiovascular parameter (e.g. heart rate) measurements when motion is present. Biometric sensor signal measurements may be obtained based on cardiovascular parameters of a user; and motion sensor signal measurements may be obtained based on user motion. An activity type may be determined based on the motion sensor signals. For example, when non-motion related frequencies in a frequency domain representation of the biometric sensor signal are obscured by user motion, an activity type may be determined based on the motion sensor signals. Further, based on the activity type, for each cardiovascular parameter (e.g. heart rate), a corresponding likely cardiovascular parameter value (e.g. a likely heart rate) may be determined. A corresponding fundamental frequency associated with the biometric sensor signal may then be determined for each cardiovascular parameter based on the motion sensor signal measurements and the corresponding likely cardiovascular parameter value.

Abstract: The present invention is for a method and system for pain classification and monitoring optionally in a subject that is an awake, semi-awake or sedated.

Abstract: A system and method for controlling a monitoring mode or treatment mode of an implantable medical device based on the detection of an external signal. The system and related method allow for more frequent monitoring of medical parameters at times where more frequent monitoring is necessary, such as during or after a dialysis session, with less frequent monitoring at other times, allowing for a more efficient medical device. The invention also allows for the frequency or mode of treatment by the implantable medical device, or the transmission of data from the implantable medical device to be controlled based on the external signal.

Abstract: Some embodiments of a balloon catheter device for introduction into a body vessel, in particular the coronary sinus, can include a catheter shaft which carries an inflatable balloon on its distal portion and in which a plurality of different lumens are formed. In particular embodiments, a system for treating heart tissue can include a coronary sinus occlusion catheter configured for improved deliverability to the coronary sinus and for thereafter performing intermittent occlusion of the coronary sinus.

Abstract: Disclosed is ischemic precondition treatment equipment and a use and method thereof for judging health condition of blood vessels. A gas way structure (4) is arranged inside a shell of ischemic precondition training treatment equipment. The gas way structure comprises a 5-way device (43). The 5-way device (43) is connected to a left gas pump (41), a right gas pump (42), a left solenoid valve (44), a right solenoid valve (45) and a release valve (48), respectively. The gas way structure (4) can rapidly bring a pressure of an armband airbag to the set pressure value in a short period of time, which is effective in relieving the patients' discomfort and pain when used. It is suitable for long-term use for training. In addition, it also can judge the health condition of blood vessels.

Abstract: The present disclosure relates to systems and methods for monitoring baby physical characteristics. In some embodiments, the method may include projecting light from a video monitoring system toward a monitored user, and detecting a heart rate of the monitored user at the video monitoring system based at least in part on detecting the projected light. The method may further include comparing the detected heart rate with a predetermined heart rate threshold, and initiating an alert based at least in part on the comparing.

Abstract: A pulse wave analysis apparatus including a memory, and a processor coupled to the memory and the processor configured to execute a process, the process including extracting, from each of a plurality of captured images of a subject, a plurality of image areas corresponding to each of a plurality of parts of the subject respectively, generating pieces of waveform data corresponding to the plurality of parts based on an image analysis for the plurality of image areas, each of the pieces of waveform data indicating a pulse wave of the subject, calculating a first matching degree between the pieces of waveform data, and determining whether a noise is included in the pieces of waveform data based on the first matching degree.

Abstract: An action management apparatus includes a bodily information measurement unit that measures bodily information, a communication unit for performing near-field wireless communication with another apparatus having a function of measuring bodily information, a bodily information acquisition unit that acquires the bodily information measured by the other apparatus included in a group along with the action management apparatus via a communication unit, and an information output unit that, based on first bodily information measured by the bodily information measurement unit and second bodily information acquired by the bodily information acquisition unit, outputs management information for managing an action of a wearer of an apparatus belonging to the group.

Abstract: A phase-contrast MRI (PC-MRI) system and method employing a Hybrid One- and Two-sided Flow Encoding Only (HOTFEO) acquisition scheme for accurate blood flow and velocity measurements of three-directional-velocity-encoding PC-MRI.

Abstract: The present disclosure provides a method of fabricating an implantable micro-component electrode. The method includes disposing an electrically non-conductive material directly onto a surface of an electrically conductive carbon fiber core to generate an electrically non-conductive coating on the electrically conductive carbon fiber core, and removing a portion of the electrically non-conductive coating to expose a region of the electrically conductive carbon fiber core. The micro-component electrode has at least one dimension of less than or equal to about 10 ?m.

Abstract: A noise detection sensor structure provides hardware-assisted real-time artifact detection on a live bio signal of interest while that signal is being recorded. The structure is configured to detect and analyze the type of external noise, and to use information about the noise type (such as noise level, frequency range of noise, noise source) to improve signal quality and usability of the bio signal. Different algorithms can be used for each noise type detected. In some example cases, for instance, the structure is configured to at least one of extract noise from measurement signal, synchronize measurement with noise signal, change the software filter or analysis algorithm, change gain/filter settings of noise mitigation circuitry, and prompt user to assist as needed, based on the detected noise. Bad signal epochs can be discarded prior to recording, to efficiently use storage. Separate channel(s)/sensor(s) can be used, with different filtering/gain schemes, for noise detection.

Abstract: The present invention provides a bio-electrode composition including: a resin containing a urethane bond in a main chain and a siloxane bond in a side chain; and an electro-conductive material, wherein the electro-conductive material is a polymer compound having one or more repeating units selected from fluorosulfonic acid salts shown by the following formulae (1)-1 and (1)-2, sulfonimide salts shown by the following formula (1)-3, and sulfonamide salts shown by the following formula (1)-4. This can form a living body contact layer for a bio-electrode that is excellent in electric conductivity and biocompatibility, light in weight, manufacturable at low cost, and free from large lowering of the electric conductivity even when it is wetted with water or dried. The present invention also provides a bio-electrode in which the living body contact layer is formed from the bio-electrode composition, and a method for manufacturing the bio-electrode.

Abstract: Provided are an electrocardiogram signal parallel analysis apparatus, a mobile terminal incorporating the apparatus, and related methods. The apparatus includes an integrated memory, a central processing unit and a graphic processing unit. The integrated memory includes a first memory and a second memory for being used by the central processing unit and the graphic processing unit respectively, and the central processing unit may access the second memory. The central processing unit performs primary noise reduction on a received electrocardiogram original signal to obtain a primary electrocardiogram signal, and performs abnormal heartbeat classification preliminary screening on characteristic data extracted from the graphic processing unit to obtain suspected abnormal heartbeat data.

Abstract: A method and system for determining the subjective state of mind of a human subject presented with a test audible or visual stimulus. An an electroencephalogram (EEG) recording unit is connected to the human subject, recording the subject's EEG when presented with one or more test stimuli. The recorded EEG signal is then transformed to a 3-D map in order to visualize the brain areas that were active when presenting the test stimuli. The given 3-D map of the test stimuli is then compared with reference 3-D maps of neutral and subjectively significant stimuli.

Abstract: A system and method for assessing tissue properties of a subject within a region of interest (ROI) using a magnetic resonance imaging (MRI) system includes acquiring chemical-shift-encoded imaging data of the ROI. The method also includes determining, from imaging data a proton density water fraction (PDWF) map and quantifying, using the PDWF map, a property of tissue within the ROI. The method further includes generating, using the PDWF map, a report indicating the quantified property of the tissue. The tissue may include fibroglandular tissue (FGT).

Abstract: A ketone measurement and analysis system provides various features for enabling health program participants to interpret their ketone measurements, such as breath acetone measurements. One such feature breaks down ketone measurements into causal components. For example, the system may generate and display an estimate of how much of a participant's ketone measurement is attributable to stored fat metabolism versus consumption of a “confounding substance” such as dietary fat and/or exogenous ketones. The system may also estimate the contributions of specific confounding substances, and/or the contributions of other factors or events (such as exercise, interrupted sleep, a missed medication, etc.) that affect ketone levels. Another feature involves the generation and display of target ketone levels that are personalized for the participants. The system may generate the measurement breakdowns and target ketone levels by applying data mining algorithms to aggregated data of many program participants.

Abstract: A system for delivering an agent to be taken up by a user's lungs and for simultaneously monitoring the user's lung health includes an inhalant-flow detection system and a computer-executable medium. The inhalant-flow detection system includes a flow sensor arranged to intercept a portion of inhalant flowing through the system and to provide detection signals regarding inhalant speed as a function of time. The computer-executable medium includes non-transient computer code, which when executed on a computer, causes the computer to receive the detection signals from the flow sensor, receive information about a quantity and type of agent provided by the agent delivery device for the inhalant during the inhalation time period, and calculate a delivered dose of the agent based on at least the detection signals received, the information received about the quantity and type of agent, and information concerning physiology of the user.

Abstract: A device for the non-invasive sensing of the length of an implantable medical device includes an implantable medical device having first and second portions moveable relative to one another and a layer of resistive material disposed on one of the first and second portions. A contact is disposed on the other of the first and second portions, the contact being in sliding contact with the layer of resistive material upon relative movement between the first and second portions. A circuit is configured to measure the electrical resistance along a path including a variable length region of the layer of resistive material and the contact. The electrical resistance can then be converted into a length.

Abstract: Aspects of the subject disclosure may include, for example, obtaining a first plurality of circumference measurements, each of the first plurality of circumference measurements corresponding to a first circumference around a limb of a person at a respective one of a plurality of locations of the limb, each of the first plurality of circumference measurements being obtained from a respective one of a plurality of elastic measurement elements that is positioned at a respective one of the locations; determining, based upon the first plurality of circumference measurements, a first geometric profile along a length of the limb; and outputting data representing the first geometric profile. Other embodiments are disclosed.

Abstract: A foot sensor alarm for wheelchairs, detects if a wheelchair occupant's foot has fallen off of a wheelchair footrest. The sensor and alarm make a wheelchair occupant or care giver aware that a foot has fallen off of one or more of the footrests. Sensors may include contact closure sensors, with snap-action switches or magnetically actuated reed switches can be used. Battery-operated window alarms with piezoelectric sound emitters send out vibratory or audio sounds as alarms. An occupancy sensor seat pad is used to power up the alarm system. A flashing light emitting diode can be wired in parallel with each sound emitter to provide a visual alarm as well.

Abstract: A sensor for detecting micro-movements is provided herein. In various embodiments, the sensor includes a looped structure formed of a continuous multi-mode optical fiber arranged into a plurality of loops disposed substantially in a plane. Each loop within the looped structure is partially overlapping yet laterally offset from neighboring loops. The sensor further includes a light source coupled to a first end of the looped structure, a receiver coupled to a second end of the looped structure, and one or more control and processing modules. Related methods of manufacture and use are also disclosed.

Abstract: The invention is directed to a method of generating and measuring transiently evoked otoacoustic emissions (TEOAE) acoustic signals generated in the cochlea using a scheme of stimulating both inner ears simultaneously, left ear alone, and right ears alone with at least two different first and second averaging buffers per ear in a switching scheme with automated detection of contralateral suppression of TEOAE via statistical analysis of the differences of suppressed and unsuppressed responses.

Abstract: A medical instrument (300, 700, 1300, 1400, 1500, 1600) for performing a measurement (1513) on a biological sample using a test strip (310), wherein the medical instrument comprises: a housing (302) and an analytical unit (1508) for analyzing the test strip, wherein the analytical unit is within an interior volume (308). The analytical unit comprises a test strip mount (1510) configured for receiving the test strip to perform the measurement. The instrument further comprises a test strip port (312) between an exterior surface (304) and an interior surface (306). The test strip port is aligned with the test strip mount along an insertion direction (328). The medical instrument further comprises a shutter (100) for sealing the test port. The shutter is configured for being in a open position and a closed position. The shutter is within the interior volume. The shutter is configured for sealing the test port when in the closed position. The shutter comprises a test strip opening (106).

Abstract: “Zero-click” viewing of sensor data without any user input is provided. A display with sensor data may be “always on,” and may enable discrete viewing of sensor data without significant user hassle. Also, a system may be configured to display only current data, and/or to display the most current data for only a set interval. Also, one device in a continuous analyte monitoring system may be designated as a primary device, or hub, for receiving sensor data, and may control the flow of information and/or alerts to other devices in the system. Sensor data and/or alerts may be sent to a hierarchy of devices and/or persons in a designated order.

Abstract: Systems and methods for processing sensor analyte data are disclosed, including initiating calibration, updating calibration, evaluating clinical acceptability of reference and sensor analyte data, and evaluating the quality of sensor calibration. The sensor can be calibrated using a calibration set of one or more matched sensor and reference analyte data pairs. Reference data resulting from benchtop testing an analyte sensor prior to its insertion can be used to provide initial calibration of the sensor data. Reference data from a short term continuous analyte sensor implanted in a user can be used to initially calibrate or update sensor data from a long term continuous analyte sensor.

Abstract: A biological signal acquirer is attached to a subject and acquires a biological signal of the subject. A transmitter carried by the subject transmits the biological signal. A first communication port and a first camera are installed in a first location and connectable to a network. A second communication port and a second camera are installed in a second location and connectable to the network. A biological information acquiring device is connectable to the network and provided with a switcher. The switcher acquires, when communication establishment between the transmitter and the first communication port is detected, the biological signal through the first communication port as well as a first image taken by the first camera, and acquires, when communication establishment between the transmitter and the second communication port is detected, the biological signal through the second communication port as well as a second image taken by the second camera.

Abstract: The present disclosure relates to noninvasive methods, devices, and systems for measuring various blood constituents or analytes, such as glucose. In an embodiment, a light source comprises LEDs and super-luminescent LEDs. The light source emits light at at least wavelengths of about 1610 nm, about 1640 nm, and about 1665 nm. In an embodiment, the detector comprises a plurality of photodetectors arranged in a special geometry comprising one of a substantially linear substantially equal spaced geometry, a substantially linear substantially non-equal spaced geometry, and a substantially grid geometry.

Abstract: A fluid sampling system comprising a housing, a first pump means for withdrawing at least one fluid sample from a first sample site, means for returning at least part of the at one fluid sample to a second sample site, transferring means for transferring at least one volume of the at least one first fluid to a sampling means, second pump means for providing at least one active substance, at least one connection to a reservoir containing the at least one active substance, and at least one energy source for driving at least the first and second pump means.

Abstract: In an approach to generating preflex stimulation, one or more computer processors monitor one or more sensing devices for data associated with a user activity. Based, at least in part, on the data associated with the user activity, the one or more computer processors predict a user reaction associated with the user activity. The one or more computer processors transmit a preflex stimulus to at least one muscle of the user, wherein the at least one muscle is associated with the user reaction. The one or more computer processors determine a reaction time of the at least one muscle to the preflex stimulus.

Abstract: Systems and methods for detecting deceptive intent of a subject include observing eye movements of the subject and correlating the observed movements to known baseline neurophysiological indicators of deception. A detection system may record eye movement data from the subject, compare the eye movement data to a data model comprising threshold eye movement data samples, and from the comparison make a determination whether or not the subject is lying. The detection system may create an alert if deception is detected. The eye movements detected include saccadic and intersaccadic parameters such as intersaccadic drift velocity. Measurements may be collected in situ with a field testing device, such as a non-invasive, non-contact device attached to the subject's computing device and configured to non-obtrusively record the eye movement data.

Abstract: The present disclosure relates to a system and a method for determining a perceptual-cognitive signature of a subject. A plurality of objects moves at a controlled speed on a visual display, for a predetermined duration in each of a series of core trials. The subject identifies one or more target objects amongst the plurality of objects. The perceptual-cognitive signature of the subject is determined according to the number of target objects, the speed of the objects, the predetermined duration of each of the series of core trials, and a correctness of identifications, by the subject after each predetermined duration, of the target objects over the series of core trials.

Abstract: Minor traumatic brain injury is detected by operating (a) an image generator for presenting a visual stimulus having a predetermined movement across a visual field of a subject and (b) a sensor device for monitoring fast eye movement of the subject while the subject views the stimulus. The sensor device generates a signal encoding the subject's eye position. A computer or microprocessor operatively connected to the sensor device is configured for determining a magnitude for the fast eye velocity component.

Abstract: The present disclosure provides systems and methods for seizure detection. The method for seizure detection may include receiving a plurality of electroencephalography (EEG) signals over a plurality of channels for a subject, preprocessing the plurality of EEG signals by segmenting the plurality of EEG signals for each channel into a plurality of temporal data segments, extracting a plurality of features from each temporal data segment for each channel, and applying a machine learning algorithm to the plurality of features to perform a seizure binary classification for each temporal data segment for each channel. A control policy may be employed to determine a seizure burden on the aggregated seizure binary classifications. When the seizure burden is equal to or exceeds a threshold, a notification may be generated. The notification may be usable by a healthcare practitioner to assess whether the subject may be at risk of having a seizure.

Abstract: The use of a device to measure patient sensory response through the application of an incrementally increased electrical current to the oropharynx.

Abstract: Methods, apparatuses, and computer readable mediums for fall prediction assessment are provided. In a particular embodiment, a fall prediction profile generator is configured to identify, based on health status data associated with a patient, a hydration threshold for the patient. The fall prediction profile generator is also configured to store the identified hydration threshold as part of a hydration profile associated with the patient and provide the hydration profile to a fall prediction controller to generate a fall prediction assessment of the patient based on the hydration profile and a current hydration indicator associated with the patient.

Abstract: Methods, devices, and systems for measuring vibration of an implanted elongate vibrating body coupled to a bone of the middle ear. One system includes an elongate vibratory body having a first and second piezoelectric body separated by a central vane. The piezoelectric bodies and central vane can be individually electrically coupleable to an implantable electronic device. The electronic device can have a switch, driving circuitry and sensing circuitry within. In normal use, the driving circuitry is coupled through the switch to drive both piezoelectric bodies causing the vibratory body to vibrate. In diagnostic use, one piezoelectric body is driven while the other piezoelectric body is sensed to detect changes in vibration indicative of decoupling or undesirable impedance of the vibratory body.

Abstract: Disclosed is a postprandial glucose-measuring device for preventing the development of or reversing T2D. Included are methods for using the device as well as better use for invasive and noninvasive glucose meters. Further disclosed are novel exercise-sensitizing compositions useful for managing blood glucose levels in Type-2 diabetics with minimal risk of hypoglycemia. The disclosed glucose meters allow a user to also measure exercise and meal size—all with relatively instant feedback—more effectively than having to track the complexity posed by labels, glycemic index and calories. Also disclosed is integration of glucose-measuring devices with smartphones and health monitoring technology to make possible safe and effective interpretation of postprandial glucose readings by a patient to control or reverse Type-2 diabetes.

Abstract: Fat fraction is estimated from shear wave propagation. Acoustic radiation force is used to generate a shear wave in tissue of interest. The attenuation, center frequency, bandwidth or other non-velocity characteristic of the shear wave is calculated and used to estimate the fat fraction.

Abstract: A device for detecting spatial differences in fluid level changes in a tissue of a patient may include a support structure for securing the device to a body part of the patient, a processing element operably connected to the support structure, a wireless networking interface operably connected to the support structure and in communication with the processing element and an external computing device via a network, a first transmission module operably connected to the support structure and in communication with the processing element, a second transmission module and a third transmission module operably connected to the support structure and in communication with the processing element. When activated, the first transmission module transmits a first time varying magnetic field through the tissue of the patient. The second and third transmission modules, which are spatially separated from one another, receive first and second versions, respectively, of the first time varying magnetic field.

Abstract: A blood pressure testing device for a finger is provided in the embodiments of the disclosure, including: a housing; at least one cover plate connected pivotably to the housing; at least one detecting element, each of which is configured to detect an electrocardiogram signal and a pulse signal, and arranged to be accommodated within and connected with the housing and provided opposite to a corresponding one of the at least one cover plate so as to cooperate to define collectively a testing hole therebetween; and at least one adjusting component, each of which is arranged to be connected with the corresponding one of the at least one cover plate, and configured to drive the corresponding one of the at least one cover plate to carry out one of operations comprising: lifting up to move away from a corresponding one of the at least one detecting element, and falling down to approach the corresponding one of the at least one detecting element.

Abstract: An apparatus for monitoring EMG signals of a patient's laryngeal muscles includes an endotracheal tube having an exterior surface. Conductive electrodes are formed on the endotracheal tube. The conductive electrodes are configured to receive the EMG signals from the laryngeal muscles when the endotracheal tube is placed in a trachea of the patient. At least wireless sensor is formed on the endotracheal tube, and is configured to wirelessly transmit information to a processing apparatus.

Abstract: Reducing noise in a signal is provided. A first filter includes a selectively definable passband for filtering a first signal used in determining at least one patient parameter. A characteristic analyzer detects a characteristic of a second signal and generates a variability measurement value using a series of data values within the second signal over a previously occurring window of time. A filter controller coupled to the characteristic analyzer uses the variability measurement value to define a characteristic of the passband for the first filter and selectively tunes the passband of the first filter according to the defined characteristic. Related apparatus, systems, techniques, and articles are also described.