Computed tomography using a /sup 137/Cs source
Conference
·
· IEEE Trans. Nucl. Sci.; (United States)
OSTI ID:7256571
The purpose of this work was to explore the use of a monoenergetic gamma ray source and pulse counting techniques for use in a CT device. The ideal source for CT scanning is one with a 100-keV gamma ray, long lifetime and low-cost availability in high specific activity. However, since the attenuation coefficient of tissue-like materials varies slowly with energy a Cs-137 source was used without significant disadvantage. Phantoms consisting of brass, aluminum and low-Z, organic polymers were scanned with 2.0 mm ray spacing and up to 60 angular orientations. The results from 0.1 percent statistical accuracy data obtained with the prototype scanner have demonstrated that a 2.5 percent density gradient can be detected. One of the advantages of a Cs-137 source is that the calculated attenuation coefficients are directly proportional to physical densities of the materials scanned.
- Research Organization:
- Mount Sinai School of Medicine, New York
- OSTI ID:
- 7256571
- Conference Information:
- Journal Name: IEEE Trans. Nucl. Sci.; (United States) Journal Volume: NS-24:1
- Country of Publication:
- United States
- Language:
- English
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