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Dr Tarun K Mittal MD, FRCR, MSc, FSCCT
Consultant Cardiothoracic Radiologist
Royal Brompton and Harefield NHS Foundation Trust
Senior Clinical Lecturer, Imperial College London
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1. Abbara S, Blanke P, Maroules CD, Cheezum M, Choi AD, Han BK, et al. SCCT guidelines for the performance and acquisition of coronary computed tomographic angiography: A report of the society of Cardiovascular Computed Tomography Guidelines Committee: Endorsed by the North American Society for Cardiovascular Imaging (NASCI). J Cardiovasc Comput Tomogr. 2016;10(6):435-49.
2. Pelberg R, Budoff M, Goraya T, Keevil J, Lesser J, Litwin S, et al. Training, competency, and certification in cardiac CT: a summary statement from the Society of Cardiovascular Computed Tomography. J Cardiovasc Comput Tomogr. 2011;5(5):279-85.
3. Hounsfield GN. Computed Medical Imaging, Noble Lecture 1979 [Available from: https://www.nobelprize.org/prizes/medicine/1979/hounsfield/lecture/.
4. Hausleiter J, Meyer T, Hermann F, Hadamitzky M, Krebs M, Gerber TC, et al. Estimated radiation dose associated with cardiac CT angiography. JAMA. 2009;301(5):500-7.
5. Zanzonico P, Dauer L, Strauss HW. Radiobiology in Cardiovascular Imaging. JACC Cardiovasc Imaging. 2016;9(12):1446-61.
Figure 1: View of a modern MDCT scanner with scanner gantry, scanner bore, and ECG monitor (a). Patient lying on the table with ECG-leads placed on the chest (b) and arms raised and resting behind on a support (a).
Figure 2: (a) Showing inside of the MDCT scanner with the x-ray tube at one end and row of detector array at the opposite end. (b) Schematic of a detector array with multiple detector rows (each of 0.5 or 0.6 mm width) constituting the entire width of the detector in Z-direction (up to 16 cm). Each detector row is made of hundreds of small elements.
Figure 3: (a) Volume rendered cardiac CT angiography image showing the whole heart with length of 12-14 cm and (b) showing presence of multiple ‘step artefacts’ (white arrows).
