The intrinsic resolution of a lfov gamma camera is typically in. Pdf we describe a high resolution, small field of view sfov, charge. Existing protocols for assessing the performance characteristics of large. Find any required ge healthcare gamma camera equipment or device. Cisternogram for csf leak continued page 2 of 3 and weigh it to obtain an approximate drypledget weight. Development of a cdzntebased small field of view gamma.
Pdf investigation of an sfov hybrid gamma camera for. Detecting units all mie gamma camera systems consist of the same detector unit that is in use in the siemens or ge gamma camera system, and we claim substantial equivalence in. These cameras are unavailable for intraoperative imaging so, if required during surgery, regions of high activity are identi. Gamma camera radioactive decay gamma rays are produced by unstable nuclei when protons and neutrons rerange to a more stable configuration. Imaging and detectors for medical physics dr barbara camanzi barbara. The singlehead gamma camera is compact, lightweight, portable, and is designed to offer maximum clinical flexibility for performing nuclear medicine studies.
A scheme for assessing the performance characteristics of. Remove pledgets at 24 hours after imaging and place in labeled test tubes. Pdf characterisation of a high resolution small field of. Gamma cameras see through dense tissue symmetry magazine. Lymphoscintigraphic imaging study for quantitative evaluation. Quality control of scintillation cameras planar and spect. Planar scintigraphy used in nuclear medicine imaging emission imaging radioactive source inside.
For current cameras we can only supply you with special collimators, since the standard collimators can only be purchased through the camera manufacturer. The ergo imaging system is digirads advanced solidstate large fieldofview lfov general purpose nuclear medicine imaging system. Lfov gamma camera for all single head imaging applications outstanding cor parameters robotic mechanical movements typical intrinsic spatial resolution fwhm gamma camera is the equipment used to detect the distribution of radiopharmaceutical within the patient. Quality control of scintillation cameras planar and spect michael k. A gamma camera is a perfect device for detecting nuclear fission products from either nuclear detonations or nuclear power plant reactors accidents. Investigation of an sfov hybrid gamma camera for thyroid imaging article pdf available in physica medica 321 january 2016 with 426 reads how we measure reads. White, phd university of alabama at birmingham july 16, 2015. The information in this leaflet is intended to explain what will happen before, during, and after the test and to answer any questions that you may have. The first gamma camera was installed in 1993 and was the first of its kind in this region. Hybrid gamma camera imaging nottingham eprints university of. Camera characteristics are compared to some clinical lfov gamma cameras and also to other sfov cameras in development. Lars johansson, in principles of translational science in medicine. Radiation safety journal of nuclear medicine technology.
A handheld, highresolution small field of view sfov pinhole gamma camera has been characterised using a new set of protocols adapted from standards previously developed for large field of view. The hybrid compact gamma camera hcgc is a small field of view sfov portable hybrid gamma optical camera intended for small organ imaging at the patient bedside. For current cameras we can only supply you with special collimators, since the standard collimators can. Lfov gamma camera, 20 minutes following administration with a 17 minutes.
Pdf event positioning algorithms for scintillation gamma cameras are typically based on centroid. Comparison of the full width at half maximum fwhm of the lymphatic vessel phantom as a function of distance from the centre of the is for the hcgc and the standard lfov gamma camera at an. The following factors important for routine measurement of gamma camera resolution with this method were tested. Acraapm technical standard for nuclear medical physics performance monitoring of gamma cameras preamble this document is an educational tool designed to assist. Assessment of spatial resolution on spect using image processing.
Gamma decay usually follows an alpha or beta decay and does not change element. The singlehead gamma camera is compact, lightweight, portable. This communication proposes a generic scheme suitable for evaluating the performance characteristics of sfov gamma cameras. If the patient is unable to tolerate having the pledgets in place for 24 hours, the pledgets may be removed, and preferably replaced, at 4 hours. Characterisation of a high resolution small field of view.
Intrinsic uniformity and relative sensitivity quality control. The gamma cameras permit the dynamic acquisition of the images with better spatial resolution, and can be oriented in any direction around the patient. Basic principles of gamma camera imaging and quality control sharon l. Donald frey medical university of south carolina the gamma camera can be used as a highly sensitive detector for. Jun 23, 2017 intro for first years on the different generations of gamma cameras. Your nuclear medicine gamma camera scan your doctor has referred you for a nuclear medicine scan. Most gamma cameras can be used in three essentially different modes. Acraapm technical standard for nuclear medical physics performance monitoring of gamma cameras preamble this document is an educational tool designed to assist practitioners in providing appropriate radiologic care for patients. Investigation of an sfov hybrid gamma camera for thyroid. Review of how a gamma scintillation camera works cameras artifacts collimators 24.
The dead time of each gamma camera system must be determined experimentally in each nuclear medicine department. Comparison between videofluoroscopy, fiberoptic endoscopy and. The hcgc a hybrid gammaoptical sfov camera is investigated for use with thyroid imaging. Pdf a high resolution small field of view sfov gamma camera. Roi placement and shape, phantom orientation, spatial sampling, and procedural consistency. In this study, a thyroid phantom was used to determine the suitability of the hcgc for clinical thyroid imaging through comparison with large field of view lfov system performance. Basic principles of gamma camera imaging and quality control. Investigation of an sfov hybrid gamma camera for thyroid imaging. The information in this leaflet is intended to explain what will happen before, during, and after the test. A scheme for assessing the performance characteristics of small. The ergo is ideal for performing planar, gated, and dynamic nuclear medicine studies in imaging centers, outpatient service centers, and a variety of hospital settings.
Routine quality control recommendations for lfov gamma cameras and handheld gamma probes are well documented by the european association of nuclear. A phantom study compares lfov and hcgc image contrast. Digirad was the first to design and commercialise solidstate detector technology for nuclear medicine, and continues to be a leader in the development, manufacture and distribution of solidstate gamma cameras for use in general nuclear medicine. Planar scintigraphy used in nuclear medicine imaging emission imaging radioactive source inside patients body in both spect and planar scintigraphy radiation source used mainly 99 a 140 kev rays hence the name gamma camera.
Manualquality assurance section, ge medical systems americas. With our recommended parameters, the intrinsic uniformity and relative sensitivity quality control testing can be performed in 56 min. Digirad was the first to design and commercialise solidstate detector technology for nuclear medicine, and continues to be a. We supply collimators for all commercial gamma cameras, new and older types. Nuclear medical images are typically acquired using large field of view lfov gamma cameras designed for whole body scanning and spect. Sep 18, 2009 gamma camera developed by hal anger at berkeley in 1957 therefore also called anger camera an electronic device that detects gamma rays emitted by radio pharmaceautical e.
Today the department is equipped with the latest dual head variable angle siemens e cam gamma camera with. These gammaray mammography cameras use cadmiumzinctelluride detectors and are highly accurate, says michael k. The intrinsic resolution of a lfov gamma camera is typically in the region of 3 mm. Checked daily by placing a small amount of a known source of radioisotope in front of the camera. Characterisation of a high resolution small field of view portable. Assessment of spatial resolution on spect using image. Minimum detectable activities mda of less than 200 dpmfor99mtccan be achieved using a gamma camera with a collimator.
Practice parameters and technical standards are not inflexible rules or requirements of practice and are. Oconnor, mayo clinic, rochester, mn the purpose of quality control qc is to detect changes in the performance of a gamma camera system that may adversely affect the interpretation of clinical studies. Aug 29, 2015 in the opes investigation, the patients face is in an 80 oblique projection on front of a single rectangular headed largefieldofview lfov gamma camera equipped with a low energyhigh resolution lehr parallel hole collimator using a 140 kev 10% energy window. Gamma camera nuclear medicine gamma camera latest price. Development of a cdzntebased small field of view gamma camera. The applications of scintigraphy include early drug development and nuclear medical imaging to view and analyse images of the human body or the distribution of. Rapid objective measurement of gamma camera resolution using. This singlehead gamma camera is compact, lightweight, portable, and is designed to offer maximum clinical versatility. Today the department is equipped with the latest dual head variable angle siemens e cam gamma camera with advanced esoft work station and a fully equipped isolation ward as per the regulations laid down by the aerb. Rapid objective measurement of gamma camera resolution. Manufacturers of lfov gamma cameras routinely use stand. Pdf lymphoscintigraphic imaging study for quantitative.
Collimators for a camera to work, we need to be able to reconstruct where the gamma ray came from. The following factors important for routine measurement of gamma camera. The intrinsic resolution of a lfov gamma camera is typically in the region of 3 mm 14. Imaging and detectors for medical physics lecture 5. Bar phantom images were acquired using four large field. The hybrid compact gamma camera hcgc is a small field of view sfov portable hybrid gammaoptical camera intended for small organ imaging at the patient bedside. The mini gamma ray camera mgrc is a collimated, scintillatorcoated, low cost. The hybrid opticalgamma camera for intraoperative imaging. Gamma camera developed by hal anger at berkeley in 1957 therefore also called anger camera an electronic device that detects gamma rays emitted by radio pharmaceautical. A high resolution small field of view sfov gamma camera. Oconnor, mayo clinic, rochester, mn the purpose of quality control qc is to detect changes in the performance of a gamma camera.
Sfov hybrid gamma camera for thyroid imaging, physicamedica32 2016 290296 m s alqahtani, j e lees, s l bugby, l k jambi and a c perkins, lymphoscintigraphicimaging study for quantitative. A flood source and collimated point source of tc99m technetium of activity ranging from 20200c, was used when the camera was being aligned, finetuned and data acquisition was carried out. Lfov gamma camera for all single head imaging applications outstanding cor parameters robotic mechanical movements typical intrinsic spatial resolution fwhm basic principles. The atlas is freely downloadable as a pdftype file over the internet. Oconnor, a professor of radiologic physics at mayo clinic in rochester, minnesota. Radionuclide imaging is the most important application of radioactivity in nuclear medicine. Fine tuning and alignment of the large field of view lfov. A flood source and collimated point source of tc99m technetium of activity. Various aspects of gamma cameras are discussed below. Radiation safety using the gamma camera for counting contamination survey wipes g. The dead time of our gammacamera system was found to be 4.
205 167 252 1462 907 153 977 670 342 282 1086 21 263 848 830 989 127 961 799 933 507 946 1089 49 584 67 823 637 691 602