Analysis of optimum diameter of orbit of transmission line source in positron emission tomograph
Accurate attenuation correction is one of the most important factors to achieve quantitative measurements in positron emission tomography (PET). A transmission scan is most commonly used technique for the attenuation correction in PET. A difficulty in transmission scan is relatively long period to obtain a data with good signal-to-noise ratio. Insufficient signal-to-noise ratio of the transmission data limits that of emission data. Several approaches were reported to improve the transmission data. Those were (1) optimizing of detector threshold, (2) processing delayed coincidence sinogram before subtraction, filtering of transmission sinogram before performing attenuation correction, and (3) rejection of random and scatter coincidence by using rotating line source and information of its position. In some of these methods, additional calculation time or processing hardware is needed. The authors have estimated a relationship between ring diameter of a transmission line source and signal to noise ratio of the transmission dat. This paper aimes to analyze optimum diameter of the orbit of transmission line source in concerning to signal to noise ratio in transmission data.
- Research Organization:
- Shimadzu Corp., 1 Nishinokyo Kuwabara-cho, Nakagyo-ku, Kyoto (JP); Research Institute of Brain and Blood Vessels Akita, Senshu-Kubota-machi Akita (JP)
- OSTI ID:
- 6156624
- Report Number(s):
- CONF-881103-; TRN: 89-009836
- Journal Information:
- IEEE Trans. Nucl. Sci.; (United States), Vol. 36:1; Conference: IEEE nuclear science symposium, Orlando, FL, USA, 9 Nov 1988
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
62 RADIOLOGY AND NUCLEAR MEDICINE
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
99 GENERAL AND MISCELLANEOUS//MATHEMATICS, COMPUTING, AND INFORMATION SCIENCE
POSITRON COMPUTED TOMOGRAPHY
IMAGE PROCESSING
RADIATION DETECTORS
OPTIMIZATION
CALCULATION METHODS
COMPUTER CODES
DATA ANALYSIS
DATA TRANSMISSION
IMAGE SCANNERS
COMMUNICATIONS
COMPUTERIZED TOMOGRAPHY
DIAGNOSTIC TECHNIQUES
EMISSION COMPUTED TOMOGRAPHY
MEASURING INSTRUMENTS
PROCESSING
TOMOGRAPHY
440101* - Radiation Instrumentation- General Detectors or Monitors & Radiometric Instruments
550602 - Medicine- External Radiation in Diagnostics- (1980-)
654001 - Radiation & Shielding Physics- Radiation Physics
Shielding Calculations & Experiments
990220 - Computers
Computerized Models
& Computer Programs- (1987-1989)