Figure 1 Image reconstruction in prospectively ECG-triggered high-pitch spiral coronary CT angiography using dual-source CT. The entire period of data.

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Figure 1 Image reconstruction in prospectively ECG-triggered high-pitch spiral coronary CT angiography using dual-source CT. The entire period of data acquisition is approximately 260 ms long and is placed in diastole. Images are reconstructed using a half-scan reconstruction algorithm. The temporal resolution of each cross-sectional image is 75 ms. While the first (most cranial) image is reconstructed at the beginning of the 260 ms data window, subsequent images are reconstructed slightly later in the cardiac cycle. From: Coronary computed tomography angiography with a consistent dose below 1 mSv using prospectively electrocardiogram-triggered high-pitch spiral acquisition Eur Heart J. 2009;31(3):340-346. doi:10.1093/eurheartj/ehp470 Eur Heart J | Published on behalf of the European Society of Cardiology. All rights reserved. © The Author 2009. For permissions please email: journals.permissions@oxfordjournals.org.

Figure 2 Coronary CT angiography images obtained by prospectively ECG-triggered high-pitch coronary CT angiography. The patient (male, 43 years old, 170 cm, 76 kg) had a heart rate of 56 b.p.m. and was scanned with a pitch of 3.4. DLP for coronary CT angiography was 62 mGy cm (estimated effective dose 0.87 mSv): No coronary artery stenoses are present. (A) Transaxial image (0,6 mm slice thickness) at the level of the mid-right coronary artery (large arrow). The small arrow points at the left anterior descending coronary artery. (B) Curved multiplanar reconstruction of the left main (small arrow) and left anterior descending coronary artery (large arrow). (C) Curved multiplanar reconstruction of the left main and left circumflex coronary artery (arrow). (D) Curved multiplanar reconstruction of the right coronary artery (arrows). (E) Three-dimensional, surface weighted reconstruction of the heart and coronary arteries. From: Coronary computed tomography angiography with a consistent dose below 1 mSv using prospectively electrocardiogram-triggered high-pitch spiral acquisition Eur Heart J. 2009;31(3):340-346. doi:10.1093/eurheartj/ehp470 Eur Heart J | Published on behalf of the European Society of Cardiology. All rights reserved. © The Author 2009. For permissions please email: journals.permissions@oxfordjournals.org.

Figure 3 Coronary CT angiography images obtained by prospectively ECG-triggered high-pitch coronary CT angiography in a 48-year-old male patient (183 cm, 78 kg, heart rate 54 b.p.m.). The patient was scanned with a pitch of 3.2. DLP was 64 mGy cm (estimated effective dose 0.89 mSv). The patient has a right dominant coronary pattern. Calcified plaque is present in the left anterior descending and right coronary artery, Stenoses are not present. (A) Curved multiplanar reconstruction of the left main (small arrow) and left anterior descending coronary artery (large arrow). A calcified plaque is present in the proximal left anterior descending coronary artery. (B) Curved multiplanar reconstruction of the left main and left circumflex coronary artery (arrow), which is very small in the presence of right dominant coronary circulation. (C) Curved multiplanar reconstruction of the right coronary artery (arrows). Calcified plaque is present. From: Coronary computed tomography angiography with a consistent dose below 1 mSv using prospectively electrocardiogram-triggered high-pitch spiral acquisition Eur Heart J. 2009;31(3):340-346. doi:10.1093/eurheartj/ehp470 Eur Heart J | Published on behalf of the European Society of Cardiology. All rights reserved. © The Author 2009. For permissions please email: journals.permissions@oxfordjournals.org.

Figure 4 Coronary CT angiography images obtained by prospectively ECG-triggered high-pitch coronary CT angiography in a patient with suspected coronary artery disease (male: 63 years old, 172 cm, 81 kg, heart rate 57 b.p.m.). Pitch was 3.2, DLP was 60 mGy cm (estimated effective dose 0.84 mSv). A high-grade stenosis was found in the proximal left circumflex coronary artery and confirmed by invasive coronary angiography. (A) Curved multiplanar reconstruction of the left main (small arrow) and left anterior descending coronary artery (large arrow). A calcified plaque is present in the proximal left anterior descending coronary artery. (B) Curved multiplanar reconstruction of the right coronary artery (arrows). (C) Curved multiplanar reconstruction of the left main and left circumflex coronary artery (arrow), which displays a high-grade stenosis in the proximal segment (arrow and insert). (D) Corresponding invasive coronary angiogram which conforms a high-grade stenosis (arrow). From: Coronary computed tomography angiography with a consistent dose below 1 mSv using prospectively electrocardiogram-triggered high-pitch spiral acquisition Eur Heart J. 2009;31(3):340-346. doi:10.1093/eurheartj/ehp470 Eur Heart J | Published on behalf of the European Society of Cardiology. All rights reserved. © The Author 2009. For permissions please email: journals.permissions@oxfordjournals.org.