Radiation dose, image quality, stenosis measurement, and CT densitometry using ECG-triggered coronary 64-MDCT angiography: a phantom study

AJR. American Journal of Roentgenology
Jun HoriguchiKatsuhide Ito

Abstract

The purpose of this study was to compare prospective ECG-triggered and retrospective ECG-gated coronary 64-MDCT angiography as to radiation dose, image quality, accuracy of stenosis measurement, and CT densitometry. Coronary artery models (n = 3) with different plaque densities (approximately 50, approximately 110, and approximately 1,000 H) on a cardiac phantom were scanned in variable heart rate sequences (n = 14) with both prospective ECG-triggered and retrospective ECG-gated scanning. Radiation dose, image quality graded by motion and stairstep artifacts (grade 1, excellent, to grade 4, poor, with grades 1 and 2 defined as satisfactory), accuracy of stenosis measurement (area; 18%, 50%, and 82%), and CT densitometry of plaques (soft, approximately 50; and intermediate, approximately 110 H) were compared between the two protocols using the Mann-Whitney U test and repeated measures. The radiation dose of prospective ECG-triggered CT angiography (CTA) (3.0 mSv) was lower than that of retrospective ECG-gated CTA (11.7-13.0 mSv) when the same tube current (mA) and voltage (kVp) were used in both methods. Prospective ECG-triggered CTA images were assigned a satisfactory quality rating in stable heart rate up to 75 beats per minut...Continue Reading

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Citations

Jun 10, 2009·Neuroradiology·Anisa MnyusiwallaSean P Symons
Aug 12, 2009·La Radiologia medica·R MalagòR Pozzi Mucelli
Nov 21, 2008·AJR. American Journal of Roentgenology·Paul StolzmannHatem Alkadhi
Jun 23, 2009·AJR. American Journal of Roentgenology·Chikako FujiokaKatsuhide Ito
Jul 22, 2009·AJR. American Journal of Roentgenology·Bingsheng HuangPek-Lan Khong
Feb 24, 2011·AJR. American Journal of Roentgenology·Fergus V CoakleyRonald L Arenson
Feb 2, 2011·Nihon Hoshasen Gijutsu Gakkai zasshi·Koichi Sugisawa
Jul 6, 2014·Journal of Clinical Imaging Science·Atif N KhanMohammad K Khan
Mar 28, 2008·The International Journal of Cardiovascular Imaging·Frank J RybickiMarcelo F Di Carli
Apr 29, 2008·The British Journal of Radiology·E J Hall, D J Brenner
Jan 28, 2010·Seminars in Ultrasound, CT, and MR·Michael V HuppmannMarcia C Javitt
Jan 8, 2014·Journal of Medical Imaging and Radiation Oncology·Nicholas D ArdleyJohn M Troupis
Jun 21, 2011·European Journal of Radiology·E DougeniG Panayiotakis
Jan 17, 2012·Korean Journal of Radiology : Official Journal of the Korean Radiological Society·Wen Jie YangZi Lai Pan
Aug 12, 2008·Topics in Magnetic Resonance Imaging : TMRI·Derek G LohanJ Paul Finn

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