Survey of conventional and spiral ct doses.

  • Hidajat N
  • Wolf M
  • Nunnemann A
 et al. 
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Abstract

PURPOSE: To investigate the radiation dose for conventional computed tomography (CT) and spiral CT during different CT examinations at various hospitals and practices. MATERIALS AND METHODS: CT dose index with an active length of 15 cm was measured in 16 different types of CT scanners by using ionization chamber dosimetry. Twenty-six holders (one who has legal responsibility under national law for a radiologic installation) operating a total of seven conventional and 20 spiral CT scanners were asked for their standard parameters for various CT examinations. Weighted CT dose index and dose-length product were determined for each examination. RESULTS: For most examinations, the tube current time product was significantly higher for conventional CT than for spiral CT (.002

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Authors

  • N Hidajat

  • M Wolf

  • a Nunnemann

  • P Liersch

  • B Gebauer

  • U Teichgräber

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