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OBJECTIVE. The purpose of this study was to compare 5-minute delayed transitional phase imaging using a 30° flip angle (hereafter, 5min-FA30) and 20-minute hepatocyte phase imaging using a 10° flip angle (hereafter, 20min-FA10) in gadoxetic acid–enhanced MRI for focal hepatic lesion detection and lesion-to-liver contrast-to-noise ratio (CNR), and to determine whether 5min-FA30 could replace 20min-FA10 with a 15-minute time saving.

MATERIALS AND METHODS. One hundred sixteen patients with 282 focal hepatic lesions (size range, 0.2–12.5 cm; malignant, n = 146; benign, n = 136) underwent gadoxetic acid–enhanced MRI with 5min-FA30 and 20min-FA10 with a 3D T1-weighted gradient-echo sequence. Three radiologists independently assessed the presence of focal hepatic lesions using a 4-point scale, and detection sensitivity of focal hepatic lesions was calculated. Lesion-to-liver CNRs were …