Image noise and radiation dose using an automatic tube current modulation technique at 64-detector computed tomography: Effect of off-center patient position, bowtie filter type, and scan projection radiograph

Yoshinori Funama, Katsuyuki Taguchi, Kazuo Awai, Daisuke Sakabe, Masamichi Shimamura, Yasuyuki Yamashita

Research output: Contribution to journalArticle

Abstract

We describe the effect of the off-center position, the bowtie filter type, and the direction of scan projection radiograph on the radiation dose and image noise of 64-detector computed tomographic scans using the automatic tube current modulation technique. On anteroposterior scan projection radiographs, the tube current ratio increased, with an increase in the off-center position of the phantom irrespective of the filter size. On lateral scan projection radiographs, it remained constant with each bowtie filter type regardless of the off-center phantom position.

Original languageEnglish (US)
Pages (from-to)973-977
Number of pages5
JournalJournal of computer assisted tomography
Volume33
Issue number6
DOIs
StatePublished - Nov 1 2009

Keywords

  • ATCM technique
  • Bowtie filter
  • Image noise
  • Radiation dose
  • Scan projection radiograph

ASJC Scopus subject areas

  • Radiology Nuclear Medicine and imaging

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