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Principles of Cardiac CT Image Acquisition

  • Thomas HenzlerEmail author
  • Patricia Carrascosa
  • Brian S. Ko
  • Ronen Rubinshtein
Chapter
Part of the Contemporary Medical Imaging book series (CMI)

Abstract

First-generation cardiac CT imaging techniques comprise simultaneous recording of the ECG signal combined with continuous low-pitch spiral scan acquisition with relatively high incident radiation dose. Because of the increasing number of cardiac CT studies and anticipated further growth, the contribution of cardiac CT to the radiation exposure of the population may not be negligible. With growing radiation dose awareness, a variety of different cardiac CT acquisition techniques have been developed over the past 15 years improving the dose efficiency of ECG-synchronized cardiac CT. Recent innovations have demonstrated that radiation dose at cardiac CT can be substantially reduced without detrimental effects on diagnostic image quality including single-heartbeat acquisitions, ECG-based tube current modulation, low tube voltage imaging, and advances in CT raw data reconstruction by means of iterative image reconstruction. New-generation CT scanners allow excellent image quality in the majority of cases and in a wider range of heart rates or rhythms. The aim of this chapter is to provide an overview on the various imaging acquisition techniques used in cardiac CT including the various concepts developed by the main CT vendors.

Keywords

Cardiac CT Radiation exposure in cardiac CT Retrospective ECG gating Prospective ECG triggering in cardiac CT Image quality in cardiac CT 

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Copyright information

© Humana Press 2019

Authors and Affiliations

  • Thomas Henzler
    • 1
    Email author
  • Patricia Carrascosa
    • 2
  • Brian S. Ko
    • 3
  • Ronen Rubinshtein
    • 4
  1. 1.Institute of Clinical Radiology and Nuclear Medicine, University Medical Center Mannheim, Medical Faculty Mannheim, Heidelberg UniversityHeidelbergGermany
  2. 2.Department of Cardiovascular ImagingDiagnóstico MaipúBuenos AiresArgentina
  3. 3.Department of Medicine Monash Medical Centre (MMC), Monash Cardiovascular Research Centre, MonashHEART, Monash Health and Monash UniversityMelbourneAustralia
  4. 4.Department of Cardiovascular Medicine, Lady Davis Carmel Medical Center, The Ruth and Bruce Rappaport School of Medicine, Technion-Israel Institute of TechnologyHaifaIsrael

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