Comparison of 180 degrees and 360 degrees data collection in /sup 201/T1 1 imaging using single-photon emission computerized tomography (SPECT): concise communication
Thallium-201 imaging using SPECT is being done with 180 degrees (RAO to LPO) data collection in some centers with single-gamma camera systems. Using our SPECT system with two gamma cameras, we have compared the effects of 180 degrees data collection without attenuation correction against 360 degrees collection with attenuation correction, using phantoms and patients. With a heart phantom in a chest phantom, /sup 201/T1 activities simulating normal myocardium, ischemia, infarction, and background were placed in object contrast ratios (with respect to background) of 5.0, 2.0, and -1.0, respectively. The 180 degrees data gave image contrast ratios of 1.6, 0.2, and -0.8, and the 260 degrees data gave ratios of 1.5, 0.8, and -0.3, respectively. Uniform activity throughout the heart gave similar image contrast with both data-collection methods, but there was more variability with the 180 degrees collection than with 360 degrees collection. Since attenuation correction is available with the 260 degrees collection, the effects of attenuation are seen only on the 180 degrees collection images. In eight patients the image contrasts from the 180 degrees and 260 degrees collections are similar. For our two-camera SPECT system, the 360 degrees collection permits attenuation correction, has less variability in counting statistics, and gives contrast ratios like those of 180 degrees collection.
- Research Organization:
- Duke University Medical Center, Durham, North Carolina
- OSTI ID:
- 6568751
- Journal Information:
- J. Nucl. Med.; (United States), Journal Name: J. Nucl. Med.; (United States) Vol. 23:8; ISSN JNMEA
- Country of Publication:
- United States
- Language:
- English
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BETA DECAY RADIOISOTOPES
BODY
CAMERAS
CARDIOVASCULAR DISEASES
CARDIOVASCULAR SYSTEM
COMPARATIVE EVALUATIONS
COMPUTERIZED TOMOGRAPHY
DAYS LIVING RADIOISOTOPES
DIAGNOSIS
DIAGNOSTIC TECHNIQUES
DIAGNOSTIC USES
DISEASES
ELECTRON CAPTURE RADIOISOTOPES
EMISSION COMPUTED TOMOGRAPHY
GAMMA CAMERAS
HEART
HEAVY NUCLEI
ISCHEMIA
ISOMERIC TRANSITION ISOTOPES
ISOTOPES
MOCKUP
MUSCLES
MYOCARDIAL INFARCTION
MYOCARDIUM
NUCLEI
ODD-EVEN NUCLEI
ORGANS
PATIENTS
PHANTOMS
RADIOISOTOPES
SECONDS LIVING RADIOISOTOPES
SINGLE PHOTON EMISSION COMPUTED TOMOGRAPHY
STRUCTURAL MODELS
THALLIUM 201
THALLIUM ISOTOPES
TOMOGRAPHY
USES
VASCULAR DISEASES