Comparison of three boundary detection methods for SPECT using Compton scattered photons

Journal Article · Mon Feb 01 04:00:00 EST 1988 · J. Nucl. Med.; (United States)

OSTI ID:5206951

Macey, D J; DeNardo, G L; DeNardo, S J

Three simple methods of defining the boundary of a transverse section in single photon emission computed tomography (SPECT) were compared using Compton scattered photons from a small /sup 99m/Tc source located either inside or outside a water-filled cylinder of 22 cm diameter. Scattered events were acquired with 360-degree rotation of the gamma camera and transverse section images were reconstructed using a filtered backprojection method. The boundary of section images obtained with three different geometric arrangements of the source and the camera were compared. The 90-degree Compton scatter method, using a source external to the cylinder and at 90 degrees to the front of the detector, was found to give the best boundary definition. Similarly, detection of scattered events using a radionuclide source placed outside a human body was capable of providing good boundary information for the large stack of contiguous section images produced by a rotating SPECT camera. Calculations confirmed the profound influence of boundary errors on SPECT quantitations

• Research Organization: Univ. of California, Sacramento (USA)
• OSTI ID: 5206951
• Journal Information: J. Nucl. Med.; (United States), Journal Name: J. Nucl. Med.; (United States) Vol. 29:2; ISSN JNMEA
• Country of Publication: United States
• Language: English

Related Subjects

550601* -- Medicine-- Unsealed Radionuclides in Diagnostics
62 RADIOLOGY AND NUCLEAR MEDICINE
BETA DECAY RADIOISOTOPES
BETA-MINUS DECAY RADIOISOTOPES
CAMERAS
COMPARATIVE EVALUATIONS
COMPUTERIZED TOMOGRAPHY
DIAGNOSTIC TECHNIQUES
ELEMENTARY PARTICLES
EMISSION COMPUTED TOMOGRAPHY
ERRORS
GAMMA CAMERAS
HOURS LIVING RADIOISOTOPES
IMAGES
INTERMEDIATE MASS NUCLEI
ISOMERIC NUCLEI
ISOMERIC TRANSITION ISOTOPES
ISOTOPES
MASSLESS PARTICLES
NUCLEI
ODD-EVEN NUCLEI
PHOTONS
RADIATION SOURCES
RADIOISOTOPES
SCATTERING
SINGLE PHOTON EMISSION COMPUTED TOMOGRAPHY
TECHNETIUM 99
TECHNETIUM ISOTOPES
TOMOGRAPHY
YEARS LIVING RADIOISOTOPES