Abstract: A PET-MRI apparatus according to an embodiment includes a static magnetic field magnet, a gradient coil, a high-frequency coil, an MR image reconstruction unit, a PET detector, and a PET image reconstruction unit. The high-frequency coil applies a high-frequency magnetic field to a subject placed in the static magnetic field and detects a magnetic resonance signal emitted from the subject in response to application of the high-frequency magnetic field and a gradient magnetic field. The PET detector has a ring shape and detects a gamma ray emitted from a positron-emitting radionuclide injected into the subject. The coil conductor of the high-frequency coil is made up of a first high-frequency shield that covers the outer surface of the PET detector.

Abstract: In a nuclear medicine imaging apparatus as a medical image diagnosis apparatus according to one embodiment, a PET detector is configured to detect a gamma ray emitted from a nuclide introduced into a body of a subject. A PET image reconstruction unit is configured to reconstruct a nuclear medicine image (PET image) as a medical image from the gamma ray projection data created based on the gamma ray detected by the PET detector using successive approximation. A controller is configured to control the PET image reconstruction unit to change the parameter used in the successive approximation depending on information regarding the scanning region in the body of the subject.

Abstract: According to the present embodiment, an image diagnosis apparatus includes a first image taking device that takes an image of a patient placed on a couchtop by using an X-ray emission; a second image taking device that takes images in positions by moving an image taking position of the patient by a predetermined distance at a time, along the body-axis direction; a position estimating unit; and a correction processing unit. The position estimating unit estimates a couchtop position for each of the image taking positions of the second image taking device, based on information about warping of the couchtop of the first image taking device. The correction processing unit uses information about the couchtop positions estimated by the position estimating unit, for performing a position correcting process on the images obtained by the image taking devices.

Abstract: In a PET (Positron Emission Tomography)-MRI (Magnetic Resonance Imaging) apparatus of an embodiment, a magnet that is a seamless structure generates a static magnetic field in a bore having a cylindrical shape. First detectors and second detectors are each formed in a ring shape and detect gamma rays emitted from positron emitting radionuclides injected into a subject. The first detectors and the second detectors are disposed with a space therebetween in an axial direction of the bore so as to interpose the magnetic field center of the static magnetic field therebetween.

Abstract: In a PET (Positron Emission Tomography)-MRI (Magnetic Resonance Imaging) apparatus of an embodiment, a transmitting radio frequency coil applies a radio frequency magnetic field on a subject placed in a static magnetic field. A detector is formed in a ring shape, disposed on a side adjacent to an outer circumference of the transmitting radio frequency coil, includes at least two PET detectors disposed with a space therebetween in an axial direction of a bore so as to interpose the magnetic field center of the static magnetic field therebetween, and detects gamma rays emitted from positron emitting radionuclides injected into the subject. Radio frequency shields are each formed in an approximately cylindrical shape, disposed between the transmitting radio frequency coil and the detector, and shield the radio frequency magnetic field generated by the transmitting radio frequency coil.

Abstract: A nuclear medicine imaging apparatus according to an embodiment of the invention includes a detector, a measuring unit, and an end control unit. The detector is configured to detect radiation for generating a nuclear medicine image. The measuring unit is configured to measure the number of times the detector detects the radiation. The end control unit is configured to control the detector to end the detection operation when the number of times measured by the measuring unit is equal to or less than a threshold value.

Abstract: A nuclear medicine imaging apparatus according to an embodiment of the invention includes a detector, a measuring unit, and an end control unit. The detector is configured to detect radiation for generating a nuclear medicine image. The measuring unit is configured to measure the number of times the detector detects the radiation. The end control unit is configured to control the detector to end the detection operation when the number of times measured by the measuring unit is equal to or less than a threshold value.

Abstract: A positron emission computed tomography apparatus according to an embodiment includes a detector, a coincidence counting information generating unit, and a body movement detecting unit. The detector detects annihilation radiation released from a subject. The coincidence counting information generating unit searches for sets of counting information, which counted a pair of annihilation radiations at substantially the same time, from a counting information list that is generated from output signals of the detector; generates a set of coincidence counting information for each retrieved set of counting information; and generates a time series list of coincidence counting information. Based on the time series list of coincidence counting information, the body movement detecting unit detects temporal changes in the body movement of the subject.

Abstract: According to one embodiment, a TOF-PET apparatus includes a plurality of detector rings arranged along a central axis thereof. Each of the detector rings comprises a plurality of scintillators and a plurality of photomultipliers. The scintillators are arranged on a substantial circumference around the central axis and generate scintillation in response to pair annihilation gamma-rays from a subject. The photomultipliers generate an electric signal in accordance with the generated scintillation. A length of each of the scintillators along a radial direction of the substantial circumference is set to a range in which a value of a total number of counts/time resolution of coincidence events of pair annihilation gamma-rays is more improved than when a reference scintillator whose probability of interaction with pair annihilation gamma-rays is adjusted to 80% is used under conditions of a constant total volume of the scintillators.

Abstract: A PET apparatus includes an optical coupling detachment testing unit. In one example, the optical coupling detachment testing unit inputs an electric signal to a piezoelectric element or the like adhered to a detector module and generates a sound wave within the detector module. Further, the optical coupling detachment testing unit detects the sound wave propagated within the detector module and performs a frequency analysis on the detected sound wave. Subsequently, as a result of the analysis, the optical coupling detachment testing unit detects whether an optical coupling detachment has occurred by looking for a frequency distribution specific to a surface having an optical coupling detachment and/or comparing a frequency distribution with another frequency distribution from a previous test.

Abstract: A radiation diagnostic apparatus includes a CT gantry apparatus, a PET gantry apparatus and a controller. The CT gantry apparatus includes an X-ray tube and an X-ray detector for reconstructing an X-ray CT image. The PET gantry apparatus includes a plurality of photodetectors for reconstructing nuclear medicine images and an FE circuit that is connected to the back of the photodetectors. The controller exerts control such that, when X-rays are radiated from the X-ray tube, the output from the photodetectors to the FE circuit is stopped or reduced.

Abstract: A PET apparatus includes an optical coupling detachment testing unit. In one example, the optical coupling detachment testing unit inputs an electric signal to a piezoelectric element or the like adhered to a detector module and generates a sound wave within the detector module. Further, the optical coupling detachment testing unit detects the sound wave propagated within the detector module and performs a frequency analysis on the detected sound wave. Subsequently, as a result of the analysis, the optical coupling detachment testing unit detects whether an optical coupling detachment has occurred by looking for a frequency distribution specific to a surface having an optical coupling detachment and/or comparing a frequency distribution with another frequency distribution from a previous test.

Abstract: An examination-item database storing a plurality of types of examination items capable of examining a predetermined disease and attributes of these examination items so as to correspond to one another is prepared, the degree of risk for the predetermined disease is calculated based on individual physical information, a criterion for selection of an examination item for examining the predetermined disease is generated in accordance with the calculated degree of risk, and an examination item having an attribute meeting the selection criterion is searched out from the examination-item database. In addition, the calculated degree of risk and the examination-item database are displayed so as to correspond to the predetermined disease. This makes it possible to perform the optimal examination for each individual in accordance with the degree of risk, thereby improving the efficiency of detection of a disease.

Abstract: A PET apparatus includes a clock unit. The clock unit includes: a time measuring unit that measures a time; and a reference time receiving unit that receives a reference time. The PET apparatus also includes a detection time revising unit. By using the reference time received by the reference time receiving unit, the detection time revising unit revises detection times recorded by using the time measured by the time measuring unit. For example, the detection time revising unit revises the detection times by calculating a time error that occurred during an image taking period of a predetermined image taking process by using the time measured by the time measuring unit and the reference time received by the reference time receiving unit and further distributing the calculated time error to each of the detection times recorded during the image taking period.

Abstract: According to one embodiment, a TOF-PET apparatus includes a plurality of detector rings arranged along a central axis thereof. Each of the detector rings comprises a plurality of scintillators and a plurality of photomultipliers. The scintillators are arranged on a substantial circumference around the central axis and generate scintillation in response to pair annihilation gamma-rays from a subject. The photomultipliers generate an electric signal in accordance with the generated scintillation. A length of each of the scintillators along a radial direction of the substantial circumference is set to a range in which a value of a total number of counts/time resolution of coincidence events of pair annihilation gamma-rays is more improved than when a reference scintillator whose probability of interaction with pair annihilation gamma-rays is adjusted to 80% is used under conditions of a constant total volume of the scintillators.

Abstract: In a nuclear medicine imaging apparatus as a medical image diagnosis apparatus according to one embodiment, a PET detector is configured to detect a gamma ray emitted from a nuclide introduced into a body of a subject. A PET image reconstruction unit is configured to reconstruct a nuclear medicine image (PET image) as a medical image from the gamma ray projection data created based on the gamma ray detected by the PET detector using successive approximation. A controller is configured to control the PET image reconstruction unit to change the parameter used in the successive approximation depending on information regarding the scanning region in the body of the subject.

Abstract: A nuclear medicine imaging apparatus according to an embodiment includes a gradation width storage, an estimating unit, and an image generating unit. The gradation width storage is configured to store the gradation width of an image determined by the temporal resolution of a detector. The estimating unit is configured to estimate the spatial position of a positron on the basis of the spatial position of a set of detectors and a set of detection times. The image generating unit is configured to allocate pixel value to pixels corresponding to the gradation width around the estimated spatial position such that a spatial resolution corresponding to the temporal resolution is reflected on a line linking the set of detectors, thereby generating an image.

Abstract: A radiographic apparatus according to an embodiment includes storage, a shape image capture unit, an image acquiring unit, a position acquiring unit, a conversion unit, and a positional relationship adjusting unit. The shape image capture unit captures the shape image of an examinee. The image acquiring unit acquires a shape image from the storage. The position acquiring unit acquires a position in the acquired shape image which corresponds to a region of interest. The conversion unit converts the position in the acquired shape image into a position in the captured shape image. The positional relationship adjusting unit adjusts the positional relationship between a detector and the examinee on the basis of the conversion result.

Abstract: A nuclear medicine imaging apparatus according to an embodiment of the invention includes a detector, a measuring unit, and an end control unit. The detector is configured to detect radiation for generating a nuclear medicine image. The measuring unit is configured to measure the number of times the detector detects the radiation. The end control unit is configured to control the detector to end the detection operation when the number of times measured by the measuring unit is equal to or less than a threshold value.

Abstract: An examination reserve system receipts a reserve request for an examination using a medical imaging apparatus. The examination reserve system receives information concerning a failure from the medical imaging apparatus. When a failure occurs in the medical imaging apparatus, the system lists receipted examination reserve requests.