Performance characteristics of newly developed whole-body multislice positron computed tomograph
The authors have constructed a whole-body multislice positron computed tomograph based on ''positology''. This machine has four continuously rotating detector rings with 192 BGO crystals (12 x 24 x 24mm), which are unequally arranged around each ring. Images of 7 slices at 16mm intervals can be obtained. The signals are transferred to the stationary part through photo-coupling system. The patient aperture is 54cm in diameter, and the field of view is 40cm in diameter and 12cm in depth, making it possible to take images of the whole heart at one scan. The sensitivity measured with 20cm diameter cylindrical phantom is 34.2 and 52.2 kcps/..mu..Ci/ml for in-plane and cross-plane respectively, including scattered coincidence. This high sensitivity enables the authors to make dynamic images of the heart following bolus injection of N-13 labeled ammonia, as well as wash-out dynamic images of the lungs following equilibration with N-13 labeled nitrogen gas. Spatial resolutions (FWHM) for in-plane measured with 1mm diameter Ga-68 line source in air is 7.6mm at the center of the field and 8.7mm at 20cm apart from the center. Axial resolution (FWHM) is 12mm at the center of the field. It can clearly delineate hot-spot images of Derenzo phantom of 3.0mm in diameter. The authors' can also visualize fine structures in clinical studies such as papillary muscle of the heart. Thus the machine is extremely useful for all sorts of clinical studies using positron emitters.
- Research Organization:
- Kyoto Univ., Kyoto
- OSTI ID:
- 6843434
- Report Number(s):
- CONF-840619-; TRN: 87-008888
- Journal Information:
- J. Nucl. Med.; (United States), Vol. 25:5; Conference: 31. annual meeting of the Society of Nuclear Medicine, Los Angeles, CA, USA, 5 Jun 1984
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
HEART
POSITRON COMPUTED TOMOGRAPHY
LUNGS
BGO DETECTORS
AMMONIA
APERTURES
COINCIDENCE METHODS
DEPTH
HOT SPOTS
IMAGES
LABELLED COMPOUNDS
NITROGEN 13
PATIENTS
PHANTOMS
ROTATION
SENSITIVITY ANALYSIS
SIGNALS
SPATIAL RESOLUTION
WHOLE-BODY IRRADIATION
BETA DECAY RADIOISOTOPES
BETA-PLUS DECAY RADIOISOTOPES
BODY
CARDIOVASCULAR SYSTEM
COMPUTERIZED TOMOGRAPHY
COUNTING TECHNIQUES
DIAGNOSTIC TECHNIQUES
DIMENSIONS
ELECTRON CAPTURE RADIOISOTOPES
EMISSION COMPUTED TOMOGRAPHY
EXTERNAL IRRADIATION
HYDRIDES
HYDROGEN COMPOUNDS
IRRADIATION
ISOTOPES
LIGHT NUCLEI
MEASURING INSTRUMENTS
MINUTES LIVING RADIOISOTOPES
MOCKUP
MOTION
NITROGEN COMPOUNDS
NITROGEN HYDRIDES
NITROGEN ISOTOPES
NUCLEI
ODD-EVEN NUCLEI
OPENINGS
ORGANS
RADIATION DETECTORS
RADIOISOTOPES
RESOLUTION
RESPIRATORY SYSTEM
SCINTILLATION COUNTERS
SOLID SCINTILLATION DETECTORS
STRUCTURAL MODELS
TOMOGRAPHY
550602* - Medicine- External Radiation in Diagnostics- (1980-)