Comparison of Image Qualities of 80 kVp and 120 kVp CT Venography Using Model-Based Iterative Reconstruction at Same Radiation Dose

CT venography (CTV) is being increasingly used to diagnose DVT or other venous pathology, because it offers a rapid and available alternative to sonography (1). In previous studies, CTV was reported to have 89–97% sensitivity and 94–100% specificity for the detection of deep vein thrombosis (DVT) of the pelvis and lower extremities (2-4). Due to concerns associated with ionizing radiation exposure, several dose reduction methods have been developed by CT manufacturers (5). Recently, lower tube voltages have been applied to reduce radiation dose during CT acquisition, and other methods, such as tube current modulation and the usages of noise reduction filters and a higher pitch, have also been shown to be effective (6). Comparison of Image Qualities of 80 kVp and 120 kVp CT Venography Using Model-Based Iterative Reconstruction at Same Radiation Dose 80 kVp 120 kVp