Date of download: 6/3/2016 Copyright © The American College of Cardiology. All rights reserved. From: Detection of Coronary Artery Stenoses by Low-Dose, Prospectively ECG-Triggered, High-Pitch Spiral Coronary CT Angiography J Am Coll Cardiol Img. 2011;4(4): doi: /j.jcmg Coronary CTA and Invasive Angiography of a Female Patient With Suspected Coronary Artery Disease The patient's characteristics: female, 53 years old, 168 cm, 54 kg, heart rate of 56 beats/min. The dose-length product was 62 mGy · cm (estimated effective dose, 0.87 mSv): no coronary artery stenoses are present. (A to C) Curved multiplanar reconstructions of the left main and left anterior descending coronary arteries, left circumflex coronary artery, and right coronary artery (arrows). (D) Three-dimensional surface-weighted reconstruction of the heart and coronary arteries. (E and F) Invasive coronary angiography. CTA = computed tomography angiography. Figure Legend:

Date of download: 6/3/2016 Copyright © The American College of Cardiology. All rights reserved. From: Detection of Coronary Artery Stenoses by Low-Dose, Prospectively ECG-Triggered, High-Pitch Spiral Coronary CT Angiography J Am Coll Cardiol Img. 2011;4(4): doi: /j.jcmg Coronary CTA in a Male Patient With Suspected Coronary Artery Disease Patient characteristics: male, 46 years old, 180 cm, 98 kg, heart rate 54 beats/min. The dose-length product was 58 mGy · cm (estimated effective dose, 0.81 mSv). A high-grade stenosis was found in the proximal left anterior descending coronary artery and confirmed by invasive coronary angiography. (A to C) Curved multiplanar reconstruction of the coronary arteries (large arrows = stenosis). (D) 3-dimensional reconstruction of the heart and coronary arteries (arrow = stenosis). (E to G) Invasive coronary angiography (large arrow = stenosis). Abbreviation as in Figure 1. Figure Legend:

Date of download: 6/3/2016 Copyright © The American College of Cardiology. All rights reserved. From: Detection of Coronary Artery Stenoses by Low-Dose, Prospectively ECG-Triggered, High-Pitch Spiral Coronary CT Angiography J Am Coll Cardiol Img. 2011;4(4): doi: /j.jcmg High-Grade Coronary Artery Stenoses in Low-Dose Coronary CTA High-grade stenosis of the left circumflex coronary artery in CTA (A) and invasive coronary angiography (B). A 63-year-old male patient (172 cm, 81 kg, heart rate 57 beats/min). The dose-length product (DLP) was 60 mGy · cm (estimated effective dose, 0.84 mSv). (C and D) Occlusion of the right coronary artery in CTA (C) and invasive coronary angiography (D). A 50-year-old male patient (176 cm, 80 kg, heart rate 60 beats/min). The DLP was 47 mGy · cm (estimated effective dose, 0.66 mSv). Abbreviation as in Figure 1. Figure Legend:

Date of download: 6/3/2016 Copyright © The American College of Cardiology. All rights reserved. From: Detection of Coronary Artery Stenoses by Low-Dose, Prospectively ECG-Triggered, High-Pitch Spiral Coronary CT Angiography J Am Coll Cardiol Img. 2011;4(4): doi: /j.jcmg Reduced Image Quality in the Proximal Segment of the Right Coronary Artery Heart rate was 59 beats/min when coronary CTA data acquisition was initiated, but decreased to 52 beats/min during table acceleration. Hence, imaging was performed earlier than planned in the cardiac cycle, and motion artifact is present in the proximal segments of the right coronary artery. (A) Transaxial image at the level of the proximal right coronary artery showing motion blurring (arrow). (B) Transaxial image at the level of the mid right coronary artery; no motion artifact is present (arrow). (C) Curved multiplanar reconstruction of the right coronary artery; motion artifacts are present in the proximal part and mimic the presence of noncalcified atherosclerotic plaque (arrows). (D) Invasive coronary angiography demonstrates a normal right coronary artery. Abbreviation as in Figure 1. Figure Legend: