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[Radiation exposure in diagnostic CT: comparison between spiral CT and standard CT]
M B Pitton1, M Harsini, W Mohr
1Klinik für Radiologie, Universitätsklinik, Mainz.
Aktuelle Radiologie
|September 1, 1995
Abstract:
CT-Dose-Index of Standard-CT corresponds to CT-Dose-Effect-Index of Spiral-CT. Spiral-CT provides a continuous data acquisition with well balanced dose profiles. Increasing pitch reduces radiation dose and nevertheless an unbroken reconstruction of scanned volume is possible. In contrast to Standard-CT, small parts at both ends of the volume scan are not reconstructed. Volume-Dose-Index therefore is elevated in short scan times but corresponds to that of Standard-CT in long scan times. 1 mm slices cause more radiation exposure due to their broadened dose profiles.