3.0 Tesla vs 1.5 Tesla breast magnetic resonance imaging in newly diagnosed breast cancer patients

Table 4 Magnetic resonance imaging-detected cancer characteristics n (%)

Characteristic	1.5 Tesla	3.0 Tesla	P value
Cancers (n)	23	54
Positive biopsy rate	23/88 (26)	54/198 (27)	0.89
Size (mm)
mean (range)	12.4	10.9	0.65
	(3-50)	(4-70)
Method of biopsy
MRI–guided needle biopsy	4 (17)	10 (19)
Ultrasound-guided needle biopsy	6 (26)	19 (35)
Stereotactic needle biopsy	1 (4)	1 (2)
Surgical biopsy	12 (52)	24 (44)
Morphology
Mass	13 (57)	29 (53)	1.00
Nonmass-like enhancement	3 (13)	14 (26)	0.25
Focus	7 (30)	11 (20)	0.38
Kinetics
Wash-out	6 (26)	19 (35)	0.65
Plateau	10 (44)	21 (39)	0.80
Persistent	7 (30)	14 (26)	0.78
Distribution
Multifocal	16 (70)	33 (61)	0.61
Multicentric	4 (17)	12 (22)	0.76
Contralateral	3 (13)	9 (17)	1.00
Histology
Infiltrating ductal carcinoma	14 (61)	30 (55)	0.80
Infiltrating lobular carcinoma	0 (0)	1 (2)	1.00
Ductal carcinoma in situ	9 (39)	23 (43)	0.81

Unless otherwise indicated, data are number of patients and data in parentheses are percentages. MRI: Magnetic resonance imaging.