Diagnostic performance of abbreviated gadoxetic acid-enhanced magnetic resonance protocols with contrast-enhanced computed tomography for detection of colorectal liver metastases

Figure 3 A 54-year-old woman with two colorectal liver metastases in segment 8, with diameters of 9 mm (arrows) and 4 mm (arrowheads). A: The lager metastasis (arrow) is clearly depicted as an area of hyperintensity, and the smaller metastasis (arrowhead) shows indistinct hyperintensity on single-shot fast spin echo (SSFSE) imaging; B: Lager (arrow) and smaller (arrowhead) metastases are clearly depicted as an area of hyperintensity on fat-suppressed fast spin echo (FSE) T2-weighted imaging; C: The lager metastasis (arrow) is clearly depicted as an area of hyperintensity, and the smaller metastasis (arrowhead) is not depicted on diffusion-weighted imaging (DWI); D: Lager (arrow) and smaller (arrowhead) metastases are clearly depicted as an area of hypointensity on hepatobiliary-phase imaging. Abbreviated magnetic resonance imaging (Ab-MRI) protocol 1 included SSFSE T2-weighted imaging (A), DWI (C), and hepatobiliary-phase imaging (D), whereas abbreviated MRI protocol 2 included fat-suppressed FSE T2-weighted imaging (B), DWI (C), and hepatobiliary phase imaging (D). The lager metastasis (arrows) were scored as 5 by all four readers. The smaller metastasis (arrowheads) was incorrectly scored as 3 or 4 by one of the two readers in Ab-MRI protocols 1 and 2, respectively, and was missed by one reader in Ab-MRI protocol 1.