Table 1.

Imaging systems and acquisition parameters used and total number of lesions.

	System A	System B	System C
Magnet	1.5T GE Genesis Signa	1.5T GE Signa Excite	1.5T Philips Achieva
Acquisition plane	Coronal	Axial	Axial
Pulse sequence	3D SPGR	3D FGRE	3D FFE
TR/TE (ms)	7.7/4.2	4.3/2.0	7.9/3.9
Flip angle (degree)	30	10	10
Slice thickness (mm)	3.00	2.00	2.00
In plane resolution (mm)	1.4	0.82	0.94
Temporal resolution (s)	68	58	55
# of post-contrast	3 or 5a	4 or 6	4 or 6 b
Fat suppression (y/n)	n	y	y
Parallel imaging (y/n)	n	y	y
Total benign lesions (#mass, #nonmass, #focus)	171 (109, 37, 25)	33 (22,7,4)	31 (25,5,1)
Total malignant lesions (#mass, #nonmass, #focus)	403 (251,145,7)	99 (69,28,2)	115 (76,39,0)

^aThe first two post-contrast images were acquired every 68 seconds. For the five point dynamic protocol, the remaining three images were acquired with 68 second resolution. For the three point dynamic protocol, the first two post-contrast acquisitions were followed by acquisition of high spatial resolution sagittal images for 128 seconds, and returning to a final dynamic, 68 second, acquisition.

^bFor Systems B and C, the first post-contrast acquisition was again started 20 seconds after contrast injection and the first three post-contrast images were acquired every 55–58 seconds. For the six point dynamic protocol, the remaining three images were acquired with 55–58 second resolution. For the four point dynamic protocol, the first two post-contrast acquisitions were followed by acquisition of high spatial resolution sagittal images and returning to a final dynamic acquisition.