PERFORMANCE PARAMETERS OF A LONGITUDINAL TOMOGRAPHIC POSITRON IMAGING-SYSTEM

Abstract The performance parameters of a positron camera consisting of two uncollimated scintillation cameras operated in a coincidence mode, are discussed. The image of the positron emitting radionuclide distribution is constructed by back-projection. On-line one focal plane can be constructed in hardware. By storing the four position signals corresponding to the coincident photo-events on disk a deferred selection of multiple focal planes is possible. The spatial resolution of the system is 5.5 mm fwhm. The temporal resolution varies, depending on the single count rates, between 6.5 ns and 10 ns fwhm. The sensitivity of the system is 200 Hz/μ Ci for a point source in the geometrical center of the system at a detector separation of 50 cm. The maximum coincidence count rate is 7.5 kHz.

[1]  V. Perez-Mendez.  TWO DETECTOR POSITRON CAMERA WITH HONEYCOMB LEAD CONVERTERS FOR MEDICAL IMAGING: PERFORMANCE AND DEVELOPMENTS , 1978 .

[2]  M E Phelps,et al.  ECAT: a new computerized tomographic imaging system for positron-emitting radiopharmaceuticals. , 1978, Journal of nuclear medicine : official publication, Society of Nuclear Medicine.

[3]  E. Hoffman,et al.  A positron-emission transaxial tomograph for nuclear imaging (PETT). , 1975, Radiology.

[4]  W. Walsh,et al.  Nitrogen-13-labeled ammonia for myocardial imaging. , 1977, Seminars in nuclear medicine.

[5]  M E Phelps,et al.  Effect of positron range on spatial resolution. , 1975, Journal of nuclear medicine : official publication, Society of Nuclear Medicine.

[6]  A dual head anger camera system for the imaging of positron-emitting radionuclides. , 1978, International journal of nuclear medicine and biology.

[7]  H. Primakoff,et al.  On the Angular Distribution of Two-Photon Annihilation Radiation , 1950 .

[8]  David W. Townsend,et al.  A proportional chamber positron camera for medical imaging , 1980 .

[9]  E. Meyer,et al.  POSITOME II: A HIGH EFFICIENCY PET DEVICE FOR DYNAMIC STUDIES , 1978 .

[10]  H O ANGER,et al.  GAMMA-RAY-DETECTION EFFICIENCY AND IMAGE RESOLUTION IN SODIUM IODIDE. UCRL-11184. , 1964, UCRL [reports]. U.S. Atomic Energy Commission.

[11]  R. D. Evans,et al.  Atomic Nucleus , 2020, Definitions.

[12]  C J Thompson,et al.  Dynamic Positron Emission Tomography for Study of Cerebral Hemodynamics in a Cross Section of the Head Using Positron‐Emitting 68Ga‐EDTA and 77Kr , 1977, Journal of computer assisted tomography.

[13]  A. Jeavons.  The high-density proportional chamber and its applications , 1978 .