1Medical Physics and Engineering, Graduate School of Medicine, Osaka University, Suita, Osaka, Japan; 2Medical Technology, Kousei Hospital, Okayama, Japan; 3Kawasaki Medical School Kawasaki Hospital, Okayama, Japan; 4Kurashiki Riverside Hospital, Kurashiki, Okayama, Japan; 5Toshiba Medical Research Institute, Vernon Hills, IL, United States; 6Toshiba Medical Systems Corp, Otawara, Tochigi, Japan
The diagnostic accuracy of non-contrast-enhanced MR venography using both the flow-refocused fresh-blood imaging (FR-FBI) and the swap phase-encode arterial double-subtraction elimination (SPADE) techniques for detecting deep vein thrombosis (DVT) were prospectively assessed and compared using conventional X-ray venography as the reference standard. Thirty-two consecutive patients suspected of having DVT, examined using conventional X-ray venography, underwent MR FR-FBI and SPADE. Two radiologists independently assessed the non-contrast MR venograms for presence and the sensitivities for diagnosing thrombus were 100% for both reviewers. The specificities were 100% and 99.6% and the interobserver agreement was almost perfect ( = 0.92).