Computed tomography, employing an EMI scanner at two beam energies, can be used to obtain information about the electron density and the effective atomic number of materials. The theory which is discussed has been verified experimentally and then applied in the investigation of some brain tumours in
Calibration and response of an EMI scanner
โ Scribed by R. A. Rutherford; B. R. Pullan; I. Isherwood
- Book ID
- 104723435
- Publisher
- Springer
- Year
- 1976
- Tongue
- English
- Weight
- 513 KB
- Volume
- 11
- Category
- Article
- ISSN
- 0028-3940
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โฆ Synopsis
Computed tomography provides a measurement of the linear absorption coefficient of material in vivo. The precision and accuracy of the measurements of this parameter made by the EMI scanner have been investigated at all three recommended voltage settings of the machine. The relationship between the EMI number and the linear absorption coefficient was found to be linear despite the polychromatic nature of the X-ray beam. The spatial resolution of the machine and the response to materials at different depths within the section have also been investigated.
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