WO2016068492A1 - 다중 문턱전압을 이용한 의료 영상기기의 신호처리 시스템 및 방법 - Google Patents
다중 문턱전압을 이용한 의료 영상기기의 신호처리 시스템 및 방법 Download PDFInfo
- Publication number
- WO2016068492A1 WO2016068492A1 PCT/KR2015/009994 KR2015009994W WO2016068492A1 WO 2016068492 A1 WO2016068492 A1 WO 2016068492A1 KR 2015009994 W KR2015009994 W KR 2015009994W WO 2016068492 A1 WO2016068492 A1 WO 2016068492A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- signal
- radiation detection
- output
- signal processing
- information
- Prior art date
Links
- 238000012545 processing Methods 0.000 title claims abstract description 69
- 238000002059 diagnostic imaging Methods 0.000 title claims abstract description 53
- 238000000034 method Methods 0.000 title claims description 31
- 230000005855 radiation Effects 0.000 claims abstract description 128
- 238000001514 detection method Methods 0.000 claims abstract description 90
- 238000003672 processing method Methods 0.000 claims description 10
- 239000012217 radiopharmaceutical Substances 0.000 claims description 9
- 229940121896 radiopharmaceutical Drugs 0.000 claims description 9
- 230000002799 radiopharmaceutical effect Effects 0.000 claims description 9
- 230000035484 reaction time Effects 0.000 claims description 9
- 238000002600 positron emission tomography Methods 0.000 claims description 5
- 238000002603 single-photon emission computed tomography Methods 0.000 claims description 5
- 239000003814 drug Substances 0.000 abstract 1
- 230000000149 penetrating effect Effects 0.000 abstract 1
- 230000002285 radioactive effect Effects 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 12
- 230000000694 effects Effects 0.000 description 4
- 238000003325 tomography Methods 0.000 description 3
- 238000002591 computed tomography Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000002595 magnetic resonance imaging Methods 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 210000000056 organ Anatomy 0.000 description 2
- 230000008033 biological extinction Effects 0.000 description 1
- 238000013170 computed tomography imaging Methods 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
- 238000013500 data storage Methods 0.000 description 1
- 238000003745 diagnosis Methods 0.000 description 1
- 201000010099 disease Diseases 0.000 description 1
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 1
- 238000003384 imaging method Methods 0.000 description 1
- 238000010253 intravenous injection Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000000700 radioactive tracer Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 210000001835 viscera Anatomy 0.000 description 1
Images
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B6/00—Apparatus for radiation diagnosis, e.g. combined with radiation therapy equipment
- A61B6/48—Diagnostic techniques
- A61B6/482—Diagnostic techniques involving multiple energy imaging
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B6/00—Apparatus for radiation diagnosis, e.g. combined with radiation therapy equipment
- A61B6/02—Devices for diagnosis sequentially in different planes; Stereoscopic radiation diagnosis
- A61B6/03—Computerised tomographs
- A61B6/037—Emission tomography
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/05—Detecting, measuring or recording for diagnosis by means of electric currents or magnetic fields; Measuring using microwaves or radio waves
- A61B5/055—Detecting, measuring or recording for diagnosis by means of electric currents or magnetic fields; Measuring using microwaves or radio waves involving electronic [EMR] or nuclear [NMR] magnetic resonance, e.g. magnetic resonance imaging
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B6/00—Apparatus for radiation diagnosis, e.g. combined with radiation therapy equipment
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R33/00—Arrangements or instruments for measuring magnetic variables
- G01R33/20—Arrangements or instruments for measuring magnetic variables involving magnetic resonance
- G01R33/44—Arrangements or instruments for measuring magnetic variables involving magnetic resonance using nuclear magnetic resonance [NMR]
- G01R33/48—NMR imaging systems
- G01R33/54—Signal processing systems, e.g. using pulse sequences ; Generation or control of pulse sequences; Operator console
- G01R33/543—Control of the operation of the MR system, e.g. setting of acquisition parameters prior to or during MR data acquisition, dynamic shimming, use of one or more scout images for scan plane prescription
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R33/00—Arrangements or instruments for measuring magnetic variables
- G01R33/20—Arrangements or instruments for measuring magnetic variables involving magnetic resonance
- G01R33/44—Arrangements or instruments for measuring magnetic variables involving magnetic resonance using nuclear magnetic resonance [NMR]
- G01R33/48—NMR imaging systems
- G01R33/54—Signal processing systems, e.g. using pulse sequences ; Generation or control of pulse sequences; Operator console
- G01R33/56—Image enhancement or correction, e.g. subtraction or averaging techniques, e.g. improvement of signal-to-noise ratio and resolution
- G01R33/5608—Data processing and visualization specially adapted for MR, e.g. for feature analysis and pattern recognition on the basis of measured MR data, segmentation of measured MR data, edge contour detection on the basis of measured MR data, for enhancing measured MR data in terms of signal-to-noise ratio by means of noise filtering or apodization, for enhancing measured MR data in terms of resolution by means for deblurring, windowing, zero filling, or generation of gray-scaled images, colour-coded images or images displaying vectors instead of pixels
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01T—MEASUREMENT OF NUCLEAR OR X-RADIATION
- G01T1/00—Measuring X-radiation, gamma radiation, corpuscular radiation, or cosmic radiation
- G01T1/16—Measuring radiation intensity
- G01T1/161—Applications in the field of nuclear medicine, e.g. in vivo counting
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01T—MEASUREMENT OF NUCLEAR OR X-RADIATION
- G01T1/00—Measuring X-radiation, gamma radiation, corpuscular radiation, or cosmic radiation
- G01T1/16—Measuring radiation intensity
- G01T1/161—Applications in the field of nuclear medicine, e.g. in vivo counting
- G01T1/164—Scintigraphy
- G01T1/1641—Static instruments for imaging the distribution of radioactivity in one or two dimensions using one or several scintillating elements; Radio-isotope cameras
- G01T1/1647—Processing of scintigraphic data
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01T—MEASUREMENT OF NUCLEAR OR X-RADIATION
- G01T1/00—Measuring X-radiation, gamma radiation, corpuscular radiation, or cosmic radiation
- G01T1/16—Measuring radiation intensity
- G01T1/24—Measuring radiation intensity with semiconductor detectors
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T7/00—Image analysis
- G06T7/0002—Inspection of images, e.g. flaw detection
- G06T7/0012—Biomedical image inspection
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L27/00—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate
- H01L27/14—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L31/00—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
- H01L31/08—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof in which radiation controls flow of current through the device, e.g. photoresistors
- H01L31/09—Devices sensitive to infrared, visible or ultraviolet radiation
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/30—Transforming light or analogous information into electric information
- H04N5/32—Transforming X-rays
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B6/00—Apparatus for radiation diagnosis, e.g. combined with radiation therapy equipment
- A61B6/58—Testing, adjusting or calibrating apparatus or devices for radiation diagnosis
- A61B6/582—Calibration
- A61B6/585—Calibration of detector units
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T2207/00—Indexing scheme for image analysis or image enhancement
- G06T2207/10—Image acquisition modality
- G06T2207/10072—Tomographic images
- G06T2207/10104—Positron emission tomography [PET]
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T2207/00—Indexing scheme for image analysis or image enhancement
- G06T2207/10—Image acquisition modality
- G06T2207/10072—Tomographic images
- G06T2207/10108—Single photon emission computed tomography [SPECT]
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T2207/00—Indexing scheme for image analysis or image enhancement
- G06T2207/10—Image acquisition modality
- G06T2207/10116—X-ray image
Definitions
- the present invention relates to a signal processing system and method of a medical imaging apparatus using multiple threshold voltages.
- energy information and time of radiation emitted using a plurality of threshold voltages having different values for radiation detection signals in medical imaging fields A signal processing system and method of a medical imaging apparatus using multiple threshold voltages for easily measuring information and position information.
- tomography imaging apparatuses include X-ray computed tomography (CT), magnetic resonance imaging (MRI), and nuclear medical imaging apparatus.
- CT computed tomography
- MRI magnetic resonance imaging
- nuclear medical imaging apparatus provides a detailed anatomical image of the human body
- nuclear medical imaging using radioisotopes provides an image representing physiological phenomena in the human body.
- the data signal processing system used to acquire a medical image in such a medical imaging device has a problem that the development cost increases when the multi-channel is expanded, and the size of the system also increases.
- the ASIC is used to reduce the size of the system when multi-channel expansion in the signal processing system, but this also causes a problem of high cost.
- the present invention does not use an analog-to-digital converter (ADC) or a time-to-digital converter (TDC) in a medical imaging device, and has different values for the comparator.
- ADC analog-to-digital converter
- TDC time-to-digital converter
- the present invention provides a signal processing system and method for a medical imaging apparatus that can easily recognize information such as energy, time, and position on radiation by applying a plurality of threshold voltages and comparing them with a radiation detection signal.
- Signal processing system of a medical imaging apparatus using a multi-threshold voltage for detecting the above problems is to detect the radiation emitted from the radiopharmaceutical injected into the subject or the radiation transmitted to the subject
- a signal detector for generating and outputting a radiation detection signal, and receiving a radiation detection signal for each channel output from the signal detector and a plurality of preset different threshold voltages according to the received radiation detection signal and a plurality of different threshold voltages.
- An analog signal processor for generating and outputting a plurality of comparison signals by comparing the signals with each other; and energy information, time information, and the like, which represent detailed information on the detection of radiation in the object based on the comparison signal received and received from the comparison signal; Digital scene to acquire location information It may include a processor.
- the signal detector may include a signal detector including one of a Single Photon Emission Computed Tomography (SPECT) detector, a Gamma Camera, an X-ray detector, and a PET detector.
- SPECT Single Photon Emission Computed Tomography
- Gamma Camera a Gamma Camera
- X-ray detector a PET detector
- the analog signal processing unit receives a radiation detection signal for each channel output from the signal detector and an amplifier for amplifying the radiation detection signal so that the gain of the radiation detection signal is uniform, and the plurality of amplified radiation detection signal and
- the apparatus may include a plurality of comparators configured to receive a plurality of threshold voltage values preset to have different values, and to generate and output a plurality of comparison signals by comparing the radiation detection signal with a signal according to the plurality of threshold voltage values.
- the analog signal processing unit further includes an exclusive logical sum operator for performing an exclusive logic operation (eXclusive OR) between the plurality of input comparison signals received when the plurality of comparison signals output from the plurality of comparators are respectively input. can do.
- an exclusive logical sum operator for performing an exclusive logic operation (eXclusive OR) between the plurality of input comparison signals received when the plurality of comparison signals output from the plurality of comparators are respectively input. can do.
- the digital signal processing unit receives a plurality of comparison signals output from the analog signal processing unit, stores a counter value output from an internally driven counter in response to the plurality of input comparison signals, and then stores the stored counter values.
- the reaction energy information and the reaction time information of the radiation can be calculated based on the.
- the digital signal processing unit integrates the width of the counter value to obtain a first information acquisition module for acquiring reaction energy information and a second information acquisition module for acquiring an output time of the counter value output from the counter as reaction time information. It may include.
- the digital signal processing unit may be a field programmable gate array (FPGA).
- FPGA field programmable gate array
- the digital signal processing unit may further include a third information acquisition module for acquiring response position information of radiation based on the position of an input / output (I / O) pin of the FPGA receiving the comparison signal.
- a third information acquisition module for acquiring response position information of radiation based on the position of an input / output (I / O) pin of the FPGA receiving the comparison signal.
- a signal detector detects radiation emitted from a radiopharmaceutical injected into an object or radiation transmitted through the object to detect a radiation detection signal. Generating the output; Amplifying the radiation detection signal by an analog signal processor to receive a radiation detection signal for each channel output from the signal detector to have a uniform gain; An analog signal processor receiving a plurality of preset different threshold voltage values and comparing the amplified radiation detection signals with signals according to the plurality of different threshold voltage values to generate and output a comparison signal, and a digital signal
- the processor may include receiving the comparison signal output from the analog signal processor and obtaining energy information, time information, and position information indicating detailed information on radiation detection based on the received comparison signal.
- the analog signal processing unit compares the radiation detection signal with a signal according to a plurality of threshold voltages and generates a comparison signal.
- the amplifier receives the radiation detection signal for each channel output from the signal detector to detect the radiation. Amplifying the radiation detection signal so that the gain of the signal is uniform, and receiving the plurality of radiation detection signals amplified by the plurality of comparators and a plurality of preset threshold voltage values and a plurality of thresholds received.
- the method may include outputting a plurality of comparison signals by comparing signals according to voltage values with each other.
- the analog signal processing unit compares the radiation detection signal with a signal according to a plurality of threshold voltages and generates a comparison signal.
- An exclusive logical sum calculator receives a plurality of comparison signals respectively output from the plurality of comparators.
- the method may further include performing an exclusive logic operation between the plurality of received comparison signals and outputting the operation result.
- the step of acquiring energy information, time information, and position information of radiation detection by the digital signal processor receives a plurality of comparison signals output from the analog signal processor, and drives the internally in response to the received comparison signals.
- the counter value output from the counter After storing the counter value output from the counter being in progress, it may include calculating the reaction energy information and reaction time information for the detection of radiation in the object based on the counter value.
- the step of acquiring energy information, time information, and position information of radiation detection by the digital signal processor may include: acquiring reaction energy information by integrating the width of the counter value; And acquiring, as response time information, an output time of the counter value output from an internally driven counter.
- the digital signal processing unit acquires energy information, time information, and position information of radiation detection based on the position of the input / output (I / O) pin of the FPGA receiving the comparison signal. It may further include a process of obtaining.
- a plurality of threshold voltages set to different values are applied to the comparator, and after separating the signals output from the signal detector, On the basis of this, there is an effect of easily grasping information such as energy, time, and position of the radiation detection.
- the signal processing system and method of the medical imaging apparatus using the multi-threshold voltage of the present invention by separating the output signal of the signal detector through a plurality of different threshold voltage applied to the comparator, by using an ADC or TDC to detect radiation
- the size and cost of the signal processing system can be prevented from increasing.
- the signal processing system and method of the medical imaging apparatus using the multi-threshold voltage of the present invention performs an exclusive OR operation between a plurality of comparison signals output from a comparator in the analog signal processor, thereby determining the number of output channels used in the medical imaging apparatus.
- FIG. 1 is a conceptual diagram of a signal processing system of a medical imaging apparatus using multiple threshold voltages according to an embodiment of the present invention.
- FIG. 2 is a flowchart of a signal processing method of a medical imaging apparatus using multiple threshold voltages according to another exemplary embodiment of the present invention.
- 3 is a diagram illustrating input and output signals of a comparator.
- FIG. 4 is a timing diagram illustrating a plurality of comparison signals in response to an internal clock.
- FIG. 5 is a diagram illustrating pin configuration of an FPGA.
- FIG. 6 is a conceptual diagram of a signal processing system of a medical imaging apparatus using multiple threshold voltages according to another embodiment of the present invention.
- FIG. 7 is a timing diagram illustrating exclusive logic operations between comparison signals in the analog signal processing unit.
- the signal processing system of a medical imaging apparatus using multiple threshold voltages generates a radiation detection signal by detecting radiation emitted from a radiopharmaceutical injected into an object or radiation transmitted through the object.
- a signal detector for outputting, a radiation detection signal for each channel output from the signal detector and a plurality of preset different threshold voltages are input to compare the input radiation detection signal with a signal according to a plurality of different threshold voltages respectively
- An analog signal processor for generating and outputting a comparison signal, and a digital signal for obtaining energy information, time information, and position information indicating detailed information on radiation detection in the object based on the received comparison signal received from the comparison signal; It may include a processing unit.
- a signal detector detects radiation emitted from a radiopharmaceutical injected into an object or radiation transmitted through the object to detect a radiation detection signal. Generating the output; Amplifying the radiation detection signal by an analog signal processor to receive a radiation detection signal for each channel output from the signal detector to have a uniform gain; An analog signal processor receiving a plurality of preset different threshold voltage values and comparing the amplified radiation detection signals with signals according to the plurality of different threshold voltage values to generate and output a comparison signal, and a digital signal
- the processor may include receiving the comparison signal output from the analog signal processor and obtaining energy information, time information, and position information indicating detailed information on radiation detection based on the received comparison signal.
- FIG. 1 is a conceptual diagram of a signal processing system of a medical imaging apparatus using multiple threshold voltages according to an exemplary embodiment.
- the signal processing system 100 of the medical imaging apparatus using the multiple threshold voltages of the present invention includes a signal detector 120, an analog signal processor 140, and a digital signal processor 160.
- the signal detector 120 detects the radiation emitted from the radiopharmaceutical injected into the subject or the radiation transmitted through the subject to generate and output a radiation detection signal representing the distribution in the body or the organ.
- the signal detector may include one of a single photon emission computed tomography (SPECT) detector, a gamma camera, an x-ray detector, and a positron emission tomography (PET) detector, and the output radiation detection signal is a gaussian. ) Or a semi-Gaussian signal.
- SPECT single photon emission computed tomography
- PET positron emission tomography
- the SPECT detector is a single photon tomography detector, which injects radioisotopes emitting single photons in the object or the human body, and then images their distribution tomography to evaluate biochemical changes or functional problems of the subject. have.
- a gamma camera is a camera that detects a radiotracer injected into an object or the human body and records the shape of the internal organ of the object or the human body, and when a long-term affinity substance displaying a radioisotope is administered to a patient, You can check the distribution.
- PET detector is a positron emission tomography device, which is injected into the subject or human body by intravenous injection or inhalation of radiopharmaceuticals that emit positrons, and then rotates 180 degrees by an extinction reaction after positron emission from the subject or human positron emitting radioisotope. Two gamma rays with 0.511 MeV energy emitted are detected to form an image.
- the analog signal processor 140 receives a radiation detection signal for each channel output from the signal detector 120 and a plurality of preset different threshold voltages from the outside, receives the received radiation detection signal, and a plurality of different thresholds. The signals according to the voltages are compared with each other to generate and output a plurality of comparison signals.
- the analog signal processor 140 includes an amplifier 142, a signal synthesizer (not shown), and a plurality of comparators 143, 144, 145, and 146.
- the amplifier 142 receives the radiation detection signal for each channel output from the signal detector 120 and amplifies the radiation detection signal so that the gain of the radiation detection signal is uniform.
- the plurality of comparators 143, 144, 145, and 146 receive the synthesized radiation detection signal and a plurality of threshold voltage values preset to have different values, and mutually convert the radiation detection signal and the signal according to the plurality of threshold voltage values. In comparison, a plurality of comparison signals are generated and output.
- the digital signal processor 160 receives a plurality of comparison signals from the comparators 143, 144, 145, and 146 in the analog signal processor 140, respectively, and is detected from the object or transmitted from the object in response to the received comparison signal. Obtain energy information, reaction time information, and reaction location information indicative of detailed information about the radiation.
- the digital signal processor 160 may be formed of a Field Programmable Gate Array (FPGA).
- the digital signal processor 160 receives a plurality of comparison signals output from the analog signal processor 140 and operates in response to the plurality of comparison signals. After the counter value of the counter 162 is being stored, the reaction energy information and the reaction time information of the radiation are calculated using the stored counter value.
- the digital signal processor 160 includes a first information acquisition module 163, a second information acquisition module 164, and a third information acquisition module 165.
- the first information acquisition module 163 acquires reaction energy information by integrating the width of the stored counter value.
- the second information acquisition module 164 obtains the output time of the counter value output from the counter 162 as response time information.
- the third information acquisition module 165 acquires the response position information of the radiation by using the positions of the input / output (I / O) pins of the FPGA that receive the comparison signals from the plurality of comparators 143, 144, 145, and 146.
- FIG. 2 is a flowchart illustrating a signal processing method of a medical imaging apparatus using multiple threshold voltages according to another exemplary embodiment of the present invention.
- the signal processing method of the medical imaging apparatus using the multi-threshold voltage according to the present invention firstly emits radiation emitted from a radiopharmaceutical injected into the object or transmitted through the object by the signal detector 120. Detect and generate a radiation detection signal indicative of the distribution in the body or distribution in the organ (S210).
- the analog signal processing unit 140 receives the radiation detection signal for each channel output from the signal detector 120 and amplifies the radiation detection signal to have a uniform gain (S220).
- the analog signal processor 140 receives a plurality of preset different threshold voltage values, compares the amplified radiation detection signal with signals according to the plurality of different threshold voltage values, and generates and outputs a comparison signal (S230). ).
- the amplifier 142 receives the radiation detection signal for each channel output from the signal detector 120, and amplifies the radiation detection signal so that the gain of the radiation detection signal is uniform. .
- the plurality of comparators 143, 144, 145, and 146 receive the amplified radiation detection signal and a plurality of threshold voltage values preset to different values, and output the amplified radiation detection signal and the received plurality of threshold voltage values. Each signal is compared and a plurality of comparison signals are output.
- 3 is a diagram illustrating input and output signals of a comparator.
- the optical sensor output signal received from the signal detector 120 is amplified by the amplifier 142 located in the analog signal processor 140.
- the amplified signal passes through a plurality of comparators 143, 144, 145, and 146 having different threshold voltages in the analog signal processor 140, and is converted into a comparison signal, and the converted comparison signal is converted into a digital signal processor 160. Is entered.
- comparators 143, 144, 145, and 146 are output using four comparators 143, 144, 145, and 146.
- the number of threshold voltages can be changed according to the number of comparators set by the user.
- the digital signal processor 160 receives a plurality of comparison signals output from the analog signal processor 140 through a plurality of input / output ports (I / O pins), and detailed information on the radiation detection based on the received comparison signals. Obtain energy information, time information, and location information indicating (S240). The digital signal processor 160 receives a plurality of comparison signals output from the analog signal processor 140, stores the counter values of the counters operating therein based on the received comparison signals, and then based on the counter values. Reaction energy information and reaction time information for the radiation detected from the object are calculated.
- the digital signal processor 160 may be formed of an FPGA.
- the FPGA may be operated by an internal clock smaller than 350 MHz generated from an internal clock generator 161, and each of the comparators 143, 144, 145, When the plurality of comparison signals output from 146 are input to the digital signal processing unit 160, counter values of the counter 162 operated by the internal clock are separately stored.
- FIG. 4 is a timing diagram illustrating a comparison signal in response to an internal clock.
- the reaction energy information of the radiation may be calculated by integrating the width of the stored counter value.
- reaction time information may be calculated based on the course time stamp, the timework correction value, and the amount of energy injected into the object.
- reaction position information of the radiation obtains the reaction position information of the radiation by using the position of the input / output (I / O) pins of the FPGAs receiving the comparison signals.
- FIG. 5 is a diagram illustrating an example of pin configuration of an FPGA.
- first to fourth comparison signals are output from four comparators 143, 144, 145, and 146 located in the analog signal processor 140.
- the output first comparison signal is input to the first input / output port FCOMP-OUT1 of the digital signal processor 160, and the second comparison signal is input to the second input / output port FCOMP-OUT2 of the digital signal processor 160.
- the third comparison signal is input to the third input / output port FCOMP-OUT3 of the digital signal processor 160, and the fourth comparison signal is input to the fourth input / output port FCOMP-OUT4 of the digital signal processor 160.
- the input / output port of the digital signal processor 160 receiving the first to fourth comparison signals may check the reaction position of the radiation of the first to fourth comparison signals input through the positions of the preset pins.
- an exclusive logic operator may be used to reduce the number of output channels used.
- FIG. 6 is a conceptual diagram of a signal processing system of a medical imaging apparatus using multiple threshold voltages according to another exemplary embodiment.
- the signal processing system of the medical imaging apparatus using the multi-threshold voltage of the present invention shown through FIG. 6 is very similar to the system configuration described with reference to FIG. 1, and the following description will be mainly given of the configuration having a difference from the above-described system configuration. Do it.
- the signal processing system 200 of a medical imaging apparatus using multiple threshold voltages may include a signal detector (not shown), an analog signal processor 240, and a digital signal processor (not shown). 260).
- the signal detector and the digital signal processor 260 are the same as those described above with reference to FIG. 1, a detailed description thereof will be omitted.
- the analog signal processor 240 includes a plurality of amplifiers 242a, 242b, 242c, and 242d, a plurality of comparator blocks 243a, 243b, 243c, and 243d including a plurality of comparators, and an exclusive OR operator 244.
- the plurality of amplifiers 242a, 242b, 242c, and 242d receive a radiation detection signal for each channel detected through a signal detector and amplify the radiation detection signal so that the gain of the radiation detection signal is uniform.
- a plurality of first to fourth comparators included in one comparator block are compared with each other and the signals according to the plurality of threshold voltage values input and set to have different values are compared with each other.
- the exclusive OR operator 244 receives a plurality of comparison signals respectively output from the first to fourth comparators in one comparator block, calculates an exclusive OR between each of the received comparison signals, and outputs an XOR output signal. And outputs the output XOR output signal to the digital signal processor 260.
- the exclusive-OR operator 244 performs an exclusive-OR operation between the signals output for each comparator block. That is, as shown in FIG. 6, since four comparators having a total of four different threshold voltage values are compared with respect to one amplified signal, four comparators included in one comparator block compare four comparison signals. The exclusive OR operation is performed on the four comparison signals output as described above, and generates and outputs a total of one XOR output signal. As a result, the exclusive-OR operator 244 generates and outputs one XOR output signal per comparator block.
- the signals processed in the analog signal processor may check the relationship between the signals through the timing diagram shown in FIG. 7.
- the digital signal processor 260 receives the XOR output signal output through the exclusive OR operation, and determines the time when the XOR output signal is first received as the time when the radiation in the object is detected.
- the digital signal processor 260 may measure a signal from the first high state to the second high state of the XOR output signal, and then analyze and measure the amount of radiation detection energy in the object.
- the exclusive OR operation 244 included in the analog signal processor 240 greatly reduces the number of output channels actually used in the medical imaging apparatus, thereby greatly reducing the processing time for data acquisition. .
- the signal processing system and method of the medical imaging apparatus using the multiple threshold voltage may be stored in a computer readable recording medium in which a program for execution by a computer is recorded.
- the computer-readable recording medium includes all kinds of recording devices in which data that can be read by a computer system is stored. Examples of computer-readable recording devices include ROM, RAM, CD-ROM, DVD ⁇ ROM, DVD-RAM, magnetic tape, floppy disks, hard disks, optical data storage devices, and the like.
- the computer readable recording medium can also be distributed over network coupled computer devices so that the computer readable code is stored and executed in a distributed fashion.
- a plurality of threshold voltages set to different values are applied to the comparator, and after separating the signals output from the signal detector, On the basis of this, there is an effect of easily grasping information such as energy, time, and position of the radiation detection.
- the signal processing system and method of the medical imaging apparatus using the multi-threshold voltage of the present invention separates the output signal of the signal detector through a plurality of different threshold voltages applied to the comparator, thereby using the ADC or TDC for radiation detection.
- the size and cost of the signal processing system can be prevented from increasing.
- the signal processing system and method of the medical imaging apparatus using the multi-threshold voltage of the present invention performs an exclusive OR operation between a plurality of comparison signals output from a comparator in the analog signal processor, thereby determining the number of output channels used in the medical imaging apparatus.
- the signal processing system and method of the medical imaging apparatus using the multi-threshold voltage according to the present invention have a size and a size of the signal processing system as compared to the prior art in which information such as energy, time, and position of radiation detection must be obtained using an ADC or a TDC. The increase in cost can be prevented.
- the signal processing system and method of the medical imaging apparatus using the multi-threshold voltage of the present invention can greatly reduce the processing time for data acquisition by greatly reducing the number of output channels used in the medical imaging apparatus.
Abstract
Description
Claims (15)
- 대상체 내부로 주입된 방사성 의약품으로부터 방출된 방사선 또는 상기 대상체로 조사되어 투과된 방사선을 검출하여 방사선 검출신호를 생성하여 출력하는 신호 검출기;상기 신호 검출기로부터 출력된 각 채널별 방사선 검출신호와 기설정된 복수 개의 서로 다른 문턱전압을 입력받아 입력받은 방사선 검출신호와 복수 개의 서로 다른 문턱전압에 따른 신호와 각각 비교하여 복수 개의 비교신호를 생성하여 출력하는 아날로그 신호처리부; 및상기 비교신호를 입력받고, 입력받은 상기 비교신호에 응답하여 상기 대상체 내 방사선 검출에 대한 세부 정보를 나타내는 에너지 정보, 시간 정보 및 위치 정보를 획득하는 디지털 신호처리부를 포함하는 다중 문턱전압을 이용한 의료 영상기기의 신호처리 시스템.
- 제 1항에 있어서, 상기 신호 검출기는SPECT(Single Photon Emission Computed Tomography) 검출기, 감마 카메라(Gamma Camera), X-선 검출기, PET(Positron Emission Tomography) 검출기 중 하나를 포함하는 것을 특징으로 하는 다중 문턱전압을 이용한 의료 영상기기의 신호처리 시스템.
- 제 1항에 있어서, 상기 아날로그 신호처리부는상기 신호 검출기로부터 출력된 각 채널별 방사선 검출신호를 입력받아, 상기 방사선 검출신호의 이득이 균일하도록 상기 방사선 검출신호를 증폭시키는 증폭기; 및증폭된 복수 개의 상기 방사선 검출신호 및 서로 다른 값을 갖도록 기설정된 복수 개의 문턱전압값을 입력받아, 상기 방사선 검출신호와 복수 개의 문턱전압값에 따른 신호를 상호 비교하여 복수 개의 비교신호를 생성하여 출력하는 복수 개의 비교기를 포함하는 것을 특징으로 하는 다중 문턱전압을 이용한 의료 영상기기의 신호처리 시스템.
- 제 3항에 있어서, 상기 아날로그 신호처리부는상기 복수 개의 비교기로부터 출력된 복수 개의 비교 신호를 각각 입력받아, 입력받은 복수 개의 비교 신호간에 배타적 논리합(eXclusive OR)연산을 수행하여 연산결과를 출력하는 배타적 논리합 연산기를 더 포함하는 것을 특징으로 하는 다중 문턱전압을 이용한 의료 영상기기의 신호처리 시스템.
- 제 1항에 있어서, 상기 디지털 신호처리부는상기 아날로그 신호처리부로부터 복수 개의 출력신호를 입력받고, 입력받은 복수 개의 출력신호에 응답하여 내부에서 구동 중인 카운터로부터 출력되는 카운터 값을 저장한 후, 저장된 카운터 값에 기초하여 방사선의 반응 에너지 정보 및 반응 시간 정보를 연산하는 것을 특징으로 하는 다중 문턱전압을 이용한 의료 영상기기의 신호처리 시스템.
- 제 5항에 있어서, 상기 디지털 신호처리부는상기 카운터 값의 폭을 적분하여 반응 에너지 정보를 획득하는 제1 정보 획득모듈; 및상기 카운터로부터 출력되는 카운터 값의 출력시간을 반응 시간 정보로서 획득하는 제2 정보획득모듈을 포함하는 것을 특징으로 하는 다중 문턱전압을 이용한 의료 영상기기의 신호처리 시스템.
- 제 5항에 있어서, 상기 디지털 신호처리부는FPGA(Field Programmable Gate Array)로 이루어지는 것을 특징으로 하는 다중 문턱전압을 이용한 의료 영상기기의 신호처리 시스템.
- 제 7항에 있어서, 상기 디지털 신호처리부는상기 비교신호를 입력받은 상기 FPGA의 입출력(I/O) 핀의 위치에 기초하여 방사선의 반응 위치 정보를 획득하는 제3 정보 획득 모듈을 더 포함하는 것을 특징으로 하는 다중 문턱전압을 이용한 의료 영상기기의 신호처리 시스템.
- 신호 검출기가 대상체 내부로 주입된 방사성 의약품으로부터 방출된 방사선 또는 상기 대상체로 조사되어 투과된 방사선을 검출하여 방사선 검출신호를 생성한 후 출력하는 단계;아날로그 신호처리부가 상기 신호 검출기로부터 출력된 각 채널별 방사선 검출신호를 입력받아, 균일한 이득을 가지도록 상기 방사선 검출신호를 증폭시키는 단계;상기 아날로그 신호처리부가 기설정된 복수 개의 서로 다른 문턱전압값을 입력받아 증폭된 상기 방사선 검출신호와 상기 복수 개의 서로 다른 문턱전압값에 따른 신호를 상호 비교하여 비교신호를 생성하여 출력하는 단계; 및디지털 신호처리부가 상기 아날로그 신호처리부로부터 출력된 상기 비교신호를 입력받고, 입력받은 상기 비교신호에 응답하여 방사선 검출에 대한 세부 정보를 나타내는 에너지 정보, 시간 정보 및 위치 정보를 획득하는 단계를 포함하는 다중 문턱전압을 이용한 의료 영상기기의 신호처리 방법.
- 제 9항에 있어서,상기 아날로그 신호처리부가 방사선 검출신호와 복수 개의 문턱전압값에 따른 신호를 비교하여 비교신호를 생성하는 단계는증폭기가 상기 신호 검출기로부터 출력된 각 채널별 방사선 검출신호를 입력받아, 상기 방사선 검출신호의 이득이 균일하도록 상기 방사선 검출신호를 증폭시키는 과정; 및복수 개의 비교기가 증폭된 복수 개의 상기 방사선 검출신호 및 기설정된 복수 개의 문턱전압값을 입력받아, 증폭된 상기 방사선 검출신호와 입력받은 복수 개의 문턱전압값에 따른 신호를 상호 비교하여 복수 개의 비교신호를 출력하는 과정을 포함하는 것을 특징으로 하는 다중 문턱전압을 이용한 의료 영상기기의 신호처리 방법.
- 제 10항에 있어서,상기 아날로그 신호처리부가 방사선 검출신호와 복수 개의 문턱전압값에 따른 신호를 비교하여 비교신호를 생성하는 단계는배타적 논리합 연산기가 상기 복수 개의 비교기로부터 각각 출력된 복수 개의 비교신호를 입력받아, 입력받은 복수 개의 비교신호간에 배타적 논리합 연산을 수행하고, 그 연산결과를 출력하는 과정을 더 포함하는 것을 특징으로 하는 다중 문턱전압을 이용한 의료 영상기기의 신호처리 방법.
- 제 9항에 있어서,상기 디지털 신호처리부가 방사선 검출에 대한 에너지 정보, 시간 정보 및 위치 정보를 획득하는 단계는상기 아날로그 신호처리부로부터 출력된 복수 개의 비교신호를 입력받고, 입력받은 비교신호에 응답하여 내부에서 구동 중인 카운터로부터 출력되는 카운터 값을 저장한 후, 상기 카운터 값에 기초하여 상기 대상체 내 방사선 검출에 대한 반응 에너지 정보 및 반응 시간 정보를 연산하는 것을 특징으로 하는 다중 문턱전압을 이용한 의료 영상기기의 신호처리 방법.
- 제 12항에 있어서,상기 디지털 신호처리부가 방사선 검출에 대한 에너지 정보, 시간 정보 및 위치 정보를 획득하는 단계는상기 카운터 값의 폭을 적분하여 반응 에너지 정보를 획득하는 과정; 및내부에서 구동 중인 카운터로부터 출력되는 상기 카운터 값의 출력시간을 반응 시간 정보로서 획득하는 과정을 포함하는 것을 특징으로 하는 다중 문턱전압을 이용한 의료 영상기기의 신호처리 방법.
- 제 13항에 있어서,상기 디지털 신호처리부가 방사선 검출에 대한 에너지 정보, 시간 정보 및 위치 정보를 획득하는 단계는상기 비교신호를 입력받은 FPGA의 입출력(I/O) 핀의 위치에 기초하여 방사선의 반응 위치 정보를 획득하는 과정을 더 포함하는 것을 특징으로 하는 다중 문턱전압을 이용한 의료 영상기기의 신호처리 방법.
- 제 9항 내지 제 14항 중 어느 한 항에 따른 방법을 컴퓨터로 실행하기 위한 프로그램이 기록된 컴퓨터 판독가능 기록매체.
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US15/523,349 US20170238883A1 (en) | 2014-10-30 | 2015-09-23 | Signal processing system and method for medical imaging system using multi threshold voltage |
JP2017520880A JP6387463B2 (ja) | 2014-10-30 | 2015-09-23 | 多重閾電圧を利用した医療映像システムの信号処理システム及び方法 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR10-2014-0149409 | 2014-10-30 | ||
KR1020140149409A KR101646651B1 (ko) | 2014-10-30 | 2014-10-30 | 다중 문턱전압을 이용한 의료 영상기기의 신호처리 시스템 및 방법 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2016068492A1 true WO2016068492A1 (ko) | 2016-05-06 |
Family
ID=55857777
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/KR2015/009994 WO2016068492A1 (ko) | 2014-10-30 | 2015-09-23 | 다중 문턱전압을 이용한 의료 영상기기의 신호처리 시스템 및 방법 |
Country Status (4)
Country | Link |
---|---|
US (1) | US20170238883A1 (ko) |
JP (1) | JP6387463B2 (ko) |
KR (1) | KR101646651B1 (ko) |
WO (1) | WO2016068492A1 (ko) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2018162633A1 (en) * | 2017-03-10 | 2018-09-13 | Sensl Technologies Ltd. | A coincidence resolving time (crt) readout circuit |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR101930402B1 (ko) * | 2017-04-17 | 2018-12-18 | 서울대학교산학협력단 | 톱니모양 문턱전압을 이용한 시간 기반의 신호 획득 장치 및 방법 |
KR101979391B1 (ko) * | 2017-10-02 | 2019-05-16 | 서강대학교산학협력단 | 다중 문턱전압을 이용한 의료 영상 기기에서의 신호 중복 보정 방법 및 그 의료 영상 기기 |
KR102114334B1 (ko) * | 2017-12-20 | 2020-05-22 | 서강대학교산학협력단 | 군집화와 딥러닝을 이용한 멀티플렉싱 신호 처리 장치 및 방법 |
KR102063828B1 (ko) * | 2018-02-02 | 2020-01-08 | 서강대학교산학협력단 | 방사선 영상 기기의 신호 검출 방법 및 그 방사선 영상 기기 |
CN109709595B (zh) * | 2019-01-25 | 2020-12-29 | 成都理工大学 | 多参数时间同步谱仪数据获取系统及其应用 |
CN111175804B (zh) * | 2019-12-21 | 2022-08-05 | 苏州瑞派宁科技有限公司 | 一种脉冲辐射探测电路及装置 |
KR20230089263A (ko) * | 2021-12-13 | 2023-06-20 | 서강대학교산학협력단 | 클리핑 신호를 이용한 방사선 영상 기기 및 그 신호 처리 장치 |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2003270350A (ja) * | 2002-03-18 | 2003-09-25 | Hitachi Ltd | 放射線検査装置 |
JP2010078338A (ja) * | 2008-09-24 | 2010-04-08 | Toshiba Corp | X線検出器 |
US20110121191A1 (en) * | 2009-11-26 | 2011-05-26 | Steffen Kappler | Circuit arrangement for counting x-ray radiation x-ray quanta by way of quanta-counting detectors, and also an application-specific integrated circuit and an emitter-detector system |
US20120104268A1 (en) * | 2010-10-29 | 2012-05-03 | Toshiba Medical Systems Corporation | Apparatus for fine-delay adjustments of analog signals in positron emitter tomography sensors |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP3532942B2 (ja) * | 1993-08-04 | 2004-05-31 | 浜松ホトニクス株式会社 | 放射線位置検出装置 |
DE10352012B4 (de) * | 2003-11-07 | 2007-10-04 | Siemens Ag | Detektormodul für die CT- und/oder PET- und/oder SPECT-Tomographie |
US7411198B1 (en) * | 2006-05-31 | 2008-08-12 | The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration | Integrator circuitry for single channel radiation detector |
WO2009054070A1 (ja) * | 2007-10-26 | 2009-04-30 | Shimadzu Corporation | 放射線検出器 |
US7807973B2 (en) * | 2008-08-01 | 2010-10-05 | Pulsetor, Llc | Pileup rejection in an energy-dispersive radiation spectrometry system |
JP5604443B2 (ja) * | 2008-12-17 | 2014-10-08 | コーニンクレッカ フィリップス エヌ ヴェ | X線検査装置及び方法 |
US8294110B2 (en) * | 2011-03-11 | 2012-10-23 | Kabushiki Kaisha Toshiba | Method for improved correction of SiPM non-linearity in multiplexed radiation detectors |
US8866654B2 (en) * | 2011-04-21 | 2014-10-21 | Kabushiki Kaisha Toshiba | Apparatus for analog-to-digital conversion with a high effective-sample-rate on the leading edge of a signal pulse |
KR101394627B1 (ko) | 2012-07-18 | 2014-05-13 | 한양대학교 산학협력단 | Cmos x-선 영상의료기기의 영상 데이터 획득방법 및 이를 위한 장치 |
-
2014
- 2014-10-30 KR KR1020140149409A patent/KR101646651B1/ko active IP Right Grant
-
2015
- 2015-09-23 US US15/523,349 patent/US20170238883A1/en not_active Abandoned
- 2015-09-23 WO PCT/KR2015/009994 patent/WO2016068492A1/ko active Application Filing
- 2015-09-23 JP JP2017520880A patent/JP6387463B2/ja active Active
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2003270350A (ja) * | 2002-03-18 | 2003-09-25 | Hitachi Ltd | 放射線検査装置 |
JP2010078338A (ja) * | 2008-09-24 | 2010-04-08 | Toshiba Corp | X線検出器 |
US20110121191A1 (en) * | 2009-11-26 | 2011-05-26 | Steffen Kappler | Circuit arrangement for counting x-ray radiation x-ray quanta by way of quanta-counting detectors, and also an application-specific integrated circuit and an emitter-detector system |
US20120104268A1 (en) * | 2010-10-29 | 2012-05-03 | Toshiba Medical Systems Corporation | Apparatus for fine-delay adjustments of analog signals in positron emitter tomography sensors |
Non-Patent Citations (1)
Title |
---|
K. B. KIM ET AL.: "A Data Acquisition System for PET Using Multi Voltage Threshold Method", NUCLAER SCIENCE SYMPOSIUM AND MEDICAL IMAGING CONFERENCE, 1 November 2013 (2013-11-01), Retrieved from the Internet <URL:http://www.nss-mic.org/2013/program/ListProgramDB.asp?session=M16> * |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2018162633A1 (en) * | 2017-03-10 | 2018-09-13 | Sensl Technologies Ltd. | A coincidence resolving time (crt) readout circuit |
US10760960B2 (en) | 2017-03-10 | 2020-09-01 | Sensl Technologies Ltd. | Coincidence resolving time readout circuit |
Also Published As
Publication number | Publication date |
---|---|
US20170238883A1 (en) | 2017-08-24 |
KR101646651B1 (ko) | 2016-08-08 |
JP6387463B2 (ja) | 2018-09-05 |
KR20160050686A (ko) | 2016-05-11 |
JP2017538918A (ja) | 2017-12-28 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
WO2016068492A1 (ko) | 다중 문턱전압을 이용한 의료 영상기기의 신호처리 시스템 및 방법 | |
US20220043172A1 (en) | System and method for image reconstruction in positron emission tomography | |
US20060000979A1 (en) | Device and method for digitizing pet radiation events | |
US20130030287A1 (en) | Proximity imaging type pet apparatus and system | |
US8624193B2 (en) | Timing response improvement in light-sharing detectors | |
US9161732B2 (en) | Radiographic apparatus, control method, and computer program product | |
JP2014085345A (ja) | 放射線検出器における光センサゲインおよびシンチレーション結晶の光学的結合監視のための光センサゲイン検出方法および光センサゲイン検出装置 | |
JP2005140783A (ja) | 検出器モジュール | |
US9989653B2 (en) | Detector, nuclear medical imaging apparatus, PET-CT apparatus, and PET-MRI apparatus | |
US20050167599A1 (en) | Positron emission tomography wrist detector | |
US7409077B2 (en) | Nearest-neighbor rebinning in clinical PET using on-line three dimensional LOR-to-bin mapping | |
Ashmanskas et al. | Waveform-sampling electronics for a whole-body time-of-flight PET scanner | |
Miyaoka et al. | Dual-radioisotope PET data acquisition and analysis | |
WO2013172527A1 (ko) | 시프트 레지스터를 이용한 동시계수회로 및 이를 포함하는 pet 데이터 획득 시스템, 방사선 계수시스템 및 의료진단기기 | |
RU104441U1 (ru) | Устройство для радионуклеидной диагностики пациентов | |
US9285486B2 (en) | Method for radiation detection signal processing | |
Trigilio | Development of an ASIC for SiPM readout in SPECT applications | |
WO2017086741A1 (ko) | 오차를 줄일 수 있는 어레이 디텍터를 이용한 신호 위치 검출 장치 | |
Yan et al. | Real-time digital signal processing implementation for in-beam PET of radiotherapy imaging in HIMM | |
Gao et al. | Simulation and design of a New Plug & Imaging sensor for novel Digital brain PET system | |
Janković et al. | GammaKey system for improved diagnostics with gamma cameras | |
McIntosh | Radionuclide Imaging—A Quick Scan Through | |
Kim et al. | Validation of the design of a high-sensitivity and high-resolution PET system for a preclinical PET/EPR hybrid scanner | |
JP2019056700A (ja) | 医用画像診断装置 | |
JP2003279652A (ja) | 核医学診断装置 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 15853719 Country of ref document: EP Kind code of ref document: A1 |
|
ENP | Entry into the national phase |
Ref document number: 2017520880 Country of ref document: JP Kind code of ref document: A |
|
WWE | Wipo information: entry into national phase |
Ref document number: 15523349 Country of ref document: US |
|
NENP | Non-entry into the national phase |
Ref country code: DE |
|
122 | Ep: pct application non-entry in european phase |
Ref document number: 15853719 Country of ref document: EP Kind code of ref document: A1 |