Advances made by cardiac CT in the last decade have been unparalleled in the field of medical imaging. Breathtaking technological advances in scanner hardware such as wide-array/volume scanners, dual source, high-pitch helical mode, fast gantry rotation time, smaller detectors and improved electronics have made it easy to routinely and consistently obtain high quality images of the heart (1). There has been development of multi-energy/spectral/dual energy CT using various technologies that provides improved tissue and material characterization compared to what is possible with a conventional CT, which can be used in a variety of clinical applications including myocardial perfusion, lesion characterization, improving vascular contrast, decreasing artifacts and minimizing radiation (2). Advances in radiation dose reduction techniques such as automatic tube current modulation, ECG based tube current modulation, automatic tube current and voltage selection and several generations of iterative reconstruction algorithms have ensured that high quality cardiac images can be obtained with minimal radiation (3).
Prabhakar Rajiah, MBBS, MD, FRCR
Suhny Abbara, MD