Development of the new phantom for evaluation of SPECT performance

Conference · Sun Jan 01 04:00:00 EST 1984 · J. Nucl. Med.; (United States)

OSTI ID:6843561

Fukukita, H; Oyamada, H; Nagaiwa, K; Kawai, H; Terui, S

The authors developed a new Phantom designed to evaluate the SPECT system performances of rotational gamma cameras. This phantom is composed of 5 parts, and each of them has its own purpose; such as measurements of 1) spatial resolution 2) slice thickness, 3) dose linearity, 4) uniformity, and 5) image distortion. These parts are made of Acrylic (0.8 cm in thickness) and each of them has the same disc-shape, measuring 28.4 cm in inner diameter and 7 cm in inner length. For the large field of view cameras, it is possible to set up-to 4 parts together if necessary. Therefore, 4 different parameters can be obtained at one rotation. The phantom was filled with Tc-99m solution, and SPET data were obtained as follows: for the determination of spatial resolution and slice thickness, 128 linear sampling with every 5/sup 0/ angular rotation was performed, and 64 linear sampling with every 10/sup 0/ angular rotation for dose linearity uniformity, and image distortion. The values obtained with the phantom were FWHM of 19.1 mm for spatial resolution, FWHM of 19.9 mm for slice thickness, and integral uniformity of 36.4%. For dose linearity a good correlating (r=0.99) was obtained. For image distortion it was easy to detect the misalignment of the electrical and mechanical axes. The authors found that this phantom was a suitable tool as a routine quality control and daily maintenance of SPECT system.

• Research Organization: National Cancer Center Hospital, Tokyo
• OSTI ID: 6843561
• Report Number(s): CONF-840619-
• Conference Information: Journal Name: J. Nucl. Med.; (United States) Journal Volume: 25:5
• Country of Publication: United States
• Language: English

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ACRYLATES
ALIGNMENT
BETA DECAY RADIOISOTOPES
BETA-MINUS DECAY RADIOISOTOPES
CAMERAS
CARBOXYLIC ACID SALTS
COMPUTERIZED TOMOGRAPHY
CONTROL
DIAGNOSTIC TECHNIQUES
DIMENSIONS
DOSES
EMISSION COMPUTED TOMOGRAPHY
GAMMA CAMERAS
HOURS LIVING RADIOISOTOPES
IMAGES
INTERMEDIATE MASS NUCLEI
ISOMERIC TRANSITION ISOTOPES
ISOTOPES
MAINTENANCE
MOCKUP
MOTION
NUCLEI
ODD-EVEN NUCLEI
PERFORMANCE TESTING
PHANTOMS
QUALITY CONTROL
RADIATION DOSES
RADIOISOTOPES
RESOLUTION
ROTATION
SINGLE PHOTON EMISSION COMPUTED TOMOGRAPHY
SPATIAL RESOLUTION
STRUCTURAL MODELS
TECHNETIUM 99
TECHNETIUM ISOTOPES
TESTING
THICKNESS
TOMOGRAPHY
YEARS LIVING RADIOISOTOPES