Abstract：
OBJECTIVE:To compare the accuracy of acquired diffusion weighted imaging (DWI) (b=1000 s/mm(2)) with that of computed DWI (b=1000 s/mm(2)) for the detection of hepatic metastases. METHODS:Two hundred and sixty patients underwent abdominal magnetic resonance imaging (MRI) at 3.0 T for the evaluation of hepatic metastasis, including T1-weighted imaging (T1WI), T2-weighted imaging (T2WI), heavily T2WI, DWI with b-values of 0, 500, 1000 s/mm(2), and three-dimensional dynamic contrast-enhanced MRI with gadolinium-ethoxybenzyl-diethylenetriamine pentaacetic acid (Gd-EOB-DTPA), and 190 patients were included in the final study. Computed DWI (=1000 s/mm(2)) was synthesized from lower b-values (b=0 and 500 s/mm(2)). Two groups were assigned and compared: group A (acquired DWI) and group B (computed DWI). Diagnostic performance using each imaging set was evaluated by receiver operating characteristic (ROC) curve analysis. RESULTS:A total of 76 hepatic metastases were confirmed. The area under the ROC curve (Az) of group A was larger than that of group B (Observer 1; 0.919-0.915, Observer 2; 0.926-0.901), but there were no significant differences (observer 1, P=0.500; observer 2, P=0.190). There were 5 metastases visualized in group A, but these were difficult to detect in group B. However, there were 2 metastases that were better visualized in group B than in group A. CONCLUSION:There were no significant differences between acquired DWI and computed DWI in the detection of hepatic metastasis.
journal_name
Eur J Radioljournal_title
European journal of radiologyauthors
Shimizu H,Isoda H,Fujimoto K,Kawahara S,Furuta A,Shibata T,Togashi Kdoi
10.1016/j.ejrad.2012.10.020subject
Has Abstractpub_date
2013-03-01 00:00:00pages
453-8issue
3eissn
0720-048Xissn
1872-7727pii
S0720-048X(12)00531-1journal_volume
82pub_type
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