Performance characteristics of newly developed whole-body multislice positron computed tomograph

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

OSTI ID:6843434

Senda, M; Tamaki, N; Yonekura, Y; Tanada, S; Nishimura, K; Murata, K; Fujita, T; Konishi, J; Torizuka, K; Tanaka, E

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-
• Conference Information: Journal Name: J. Nucl. Med.; (United States) Journal Volume: 25:5
• Country of Publication: United States
• Language: English

Related Subjects

550602* -- Medicine-- External Radiation in Diagnostics-- (1980-)
62 RADIOLOGY AND NUCLEAR MEDICINE
AMMONIA
APERTURES
BETA DECAY RADIOISOTOPES
BETA-PLUS DECAY RADIOISOTOPES
BGO DETECTORS
BODY
CARDIOVASCULAR SYSTEM
COINCIDENCE METHODS
COMPUTERIZED TOMOGRAPHY
COUNTING TECHNIQUES
DEPTH
DIAGNOSTIC TECHNIQUES
DIMENSIONS
ELECTRON CAPTURE RADIOISOTOPES
EMISSION COMPUTED TOMOGRAPHY
EXTERNAL IRRADIATION
HEART
HOT SPOTS
HYDRIDES
HYDROGEN COMPOUNDS
IMAGES
IRRADIATION
ISOTOPES
LABELLED COMPOUNDS
LIGHT NUCLEI
LUNGS
MEASURING INSTRUMENTS
MINUTES LIVING RADIOISOTOPES
MOCKUP
MOTION
NITROGEN 13
NITROGEN COMPOUNDS
NITROGEN HYDRIDES
NITROGEN ISOTOPES
NUCLEI
ODD-EVEN NUCLEI
OPENINGS
ORGANS
PATIENTS
PHANTOMS
POSITRON COMPUTED TOMOGRAPHY
RADIATION DETECTORS
RADIOISOTOPES
RESOLUTION
RESPIRATORY SYSTEM
ROTATION
SCINTILLATION COUNTERS
SENSITIVITY ANALYSIS
SIGNALS
SOLID SCINTILLATION DETECTORS
SPATIAL RESOLUTION
STRUCTURAL MODELS
TOMOGRAPHY
WHOLE-BODY IRRADIATION