Abstract
The properties of the electron density phantom CIRS M62 were studied. Physical and electron densities were calculated for all tissue substitutes, and compared to the values given in the data sheet and to the recommendations of the ICRU Report 44. The phantom was scanned in standard-CT and spiral-CT mode with different acquisition parameters. Especially manufactured tissue substitutes for dense bone were analysed for artifacts. Hounsfield values of all tissues substitutes were determined with the treatment planning system CadPlan®. Calibration curves were calculated and compared to a stoichiometric calibration for real tissue. There was good agreement between the values calculated and the values given by the manufacturer. The tissue substitutes were only approximately tissue equivalent. The tissue substitutes for dense bone showed small artifacts. The calculated calibration curves were in good agreement with the stoichiometric calibration curve.
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