Diagnostic accuracy and sensitivity of diffusion-weighted and of gadoxetic acid-enhanced 3-T MR imaging alone or in combination in the detection of small liver metastasis (≤ 1.5 cm in diameter).

摘要: PURPOSE To compare the diagnostic accuracy and sensitivity of combined gadoxetic acid-enhanced magnetic resonance imaging (MRI) diffusion-weighted (DWI) with each approach alone for detecting small hepatic metastases (≤ 1.5 cm). MATERIALS AND METHODS Institutional review board approved this retrospective study waived informed patient consent. Eighty-six patients 179 liver underwent MRI including unenhanced DWI at 3.0 T. Three image sets images-gadoxetic acid set (early dynamic hepatocyte phase), set, set-were analyzed independently in consensus by 2 observers using receiver operating characteristic analysis. RESULTS There was a tendency toward an increased (mean, 0.965) compared that 0.911 set; 0.926 set). The showed better 97.47%/95.0%: values on per-lesion/per-patient basis) than 90.7%/83.7% 91.6%/83.0% set) (P < 0.05) both per-lesion basis per-patient basis. All similar positive predictive values. CONCLUSIONS combination yielded detection metastasis scan sequence alone.