Figure 7a. Artifacts due to incomplete breath holding. (a) Contiguous sections demonstrate almost no motion artifacts when each image is observed separately. (b, c) Coronal (b) and sagittal (c) reformatted images demonstrate banding artifacts with kymographic contours at the cardiac border. The patient had a heart rate of 58 bpm in normal sinus rhythm during scanning. Later, it was discovered that a microphone in the CT room was out of order and that breath-holding instructions had not been given to the patient.