Angled-collimator SPECT (A-SPECT): an improved approach to cranial single photon emission tomography
Description
A special 300 slant-hole collimator has been developed for rotating camera single photon emission computerized tomography (SPECT) that allows the camera to remain close to the patient's head throughout a standard 3600 circular rotation. Compared with SPECT using parallel-hole collimation, angled-collimator SPECT (A-SPECT) yielded approximately a 30% increase in resolution without significant losses in sensitivity. The full width at half maximum in reconstructed transaxial images of Tc-99m line sources was 1.2 cm for the A-SPECT system compared with 1.6 cm for conventional SPECT, and A-SPECT yielded substantial improvements in modulation tranfer function for the line source. A-SPECT images of phantoms and of patients with paranasal sinus disease were consistently superior in resolution to those of conventional SPECT
Additional details
Publishing Information
- Journal Title
- J. Nucl. Med.
- Journal Volume
- 25
- Journal Issue
- 7
- Series
- J. Nucl. Med.
- Journal Page Range
- 805-809
- ISSN
- 0022-3123
INIS
- Country of Publication
- United States
- Country of Input or Organization
- United States
- INIS RN
- 16010480
- Subject category
- S62: RADIOLOGY AND NUCLEAR MEDICINE;
- Descriptors DEI
- BRAIN; COLLIMATORS; ISOMERIC NUCLEI; PATIENTS; PERFORMANCE; PHANTOMS; SINGLE PHOTON ECT; SKULL; SPATIAL RESOLUTION; TECHNETIUM 99
- Descriptors DEC
- BETA DECAY RADIOISOTOPES; BETA-MINUS DECAY RADIOISOTOPES; BODY; CENTRAL NERVOUS SYSTEM; COMPUTERIZED TOMOGRAPHY; DIAGNOSTIC TECHNIQUES; EMISSION COMPUTED TOMOGRAPHY; HOURS LIVING RADIOISOTOPES; INTERMEDIATE MASS NUCLEI; ISOMERIC TRANSITION ISOTOPES; ISOTOPES; MOCKUP; NERVOUS SYSTEM; NUCLEI; ODD-EVEN NUCLEI; ORGANS; RADIOISOTOPES; RESOLUTION; SKELETON; STRUCTURAL MODELS; TECHNETIUM ISOTOPES; TOMOGRAPHY; YEARS LIVING RADIOISOTOPES