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Radiation dose exposure in multislice computed tomography of the coronaries in comparison with conventional coronary

Thorsten Dill1, Anja Deetjen, Okan Ekinci

  • 1Department of Cardiology, Kerckhoff Heart Center, Bad Nauheim, Germany. t.dill@kerckhoff-klinik.de

International Journal of Cardiology
|April 6, 2007
PubMed

Insights

Multislice spiral computed tomography (MSCT) involves higher radiation doses than conventional coronary angiography (CXA). However, MSCT offers a more favorable radiation dose relation for patients with bypass grafts.

Area of Science:

  • Radiology
  • Cardiovascular Imaging
  • Medical Physics

Background:

  • Radiation dose exposure is a significant concern in medical imaging.
  • Multislice spiral computed tomography (MSCT) generally involves higher radiation doses compared to conventional coronary angiography (CXA).

Purpose of the Study:

  • To compare the effective radiation doses (ED) of MSCT and CXA.
  • To evaluate the radiation dose relation between MSCT and CXA in patients with and without bypass grafts.

Main Methods:

  • Retrospective analysis of 56 patients undergoing both MSCT and CXA.
  • Comparison of effective dose (ED) as the primary analysis variable.
  • Inclusion of patients with and without bypass grafts.

Main Results:

  • MSCT (mean ED 9.76 mSv without calcium scoring) showed higher radiation doses than CXA (mean ED 2.60 mSv) in patients without bypass grafts.
  • For patients with bypass grafts, MSCT (mean ED 12.95 mSv) also showed higher doses than CXA (mean ED 6.27 mSv).
  • Lower heart rates (

Conclusions:

  • MSCT is associated with higher radiation dose exposure than CXA.
  • The radiation dose comparison between MSCT and CXA is more favorable for MSCT in patients with bypass grafts.
  • The study highlights the need for dose reduction techniques in MSCT.
Abstract

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