Feasibility of 5-Minute Delayed Transition Phase Imaging With 30   XXXX Angle in Gadoxetic Acid-Enhanced 3D Gradient-Echo MRI of Liver, Compared With 20-Minute Delayed Hepatocyte Phase MRI With Standard 10   @entity1182 Angle.

@entity1 @entity1182 @entity18497 @entity5 @entity99
OBJECTIVE. The purpose of this study was to compare 5-minute delayed transitional phase imaging using a 30   @entity1182 angle (hereafter, 5min-FA30) and 20-minute hepatocyte phase imaging using a 10   @entity1182 angle (hereafter, 20min-FA10) in gadoxetic acid-enhanced MRI for focal @entity99 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 @entity1 with 282 focal @entity99 (size range, 0.2-12.5 cm; malignant, n = 146; benign, n = 136) underwent @entity18497 -enhanced MRI with 5min-FA30 and 20min-FA10 with a 3D T1-weighted gradient-echo sequence. Three radiologists independently assessed the presence of focal @entity99 using a 4-point scale, and detection sensitivity of focal @entity99 was calculated. Lesion-to-liver CNRs were calculated and compared in two image groups. RESULTS. There was no significant difference in detection sensitivity of focal @entity99 for all three readers between 5min-FA30 (mean, 95.4%) and 20min-FA10 (mean, 95.6%), irrespective of lesion size or @entity5 . The mean CNR on 5min-FA30 (167.9    84.1) was significantly higher than that on 20min-FA10 (160.2    79.5). However, the mean CNR difference between the two image groups was relatively small (7.8    41.9). CONCLUSION. Compared with 20min-FA10, 5min-FA30 provided higher CNR and similar sensitivity. These findings indicate that 5min-FA30 could replace 20-min delayed hepatocyte phase imaging using a 10   @entity1182 angle with similar diagnostic performance and 15 minutes of time saving.
