Dynamic contrast-enhanced breast MRI at 7T and 3T: an intra-individual comparison study

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Table 2 Histopathological proven malignant index lesions descriptors at both field strengths

Case	Field	Shape	Margin	Enhancement	Initial rise	Delayed phase	Category
1	7T	Irregular	Spiculated	Heterogeneous/homogeneous	Rapid	Wash-out	5
	3T^a	Irregular	Spiculated	Rim/heterogeneous	Rapid	Wash-out	5
2	7T	Irregular	Spiculated	Heterogeneous	Rapid	Wash-out	5
	3T^a	Irregular	Spiculated	Heterogeneous/homogeneous	Rapid/medium	Plateau	5/4
3	7T	Irregular	Spiculated/irregular	Heterogeneous	Rapid	Wash-out	5
	3T^a	Irregular	Irregular	Heterogeneous	Rapid	Wash-out	5
4	7T	Irregular	Spiculated	Heterogeneous	Rapid	Wash-out	5
	3T^a	Irregular	Spiculated	Rim enhancement	Rapid	Wash-out	5
5	7T	Irregular	Spiculated/irregular	Heterogeneous	Rapid	wash-out	5
	3T^a	Irregular/oval	Spiculated	Heterogeneous/rim	Rapid	Wash-out	5
6	7T	Irregular	Spiculated	Heterogeneous	Rapid	Wash-out	5
	3T	Irregular	Spiculated	Heterogeneous	Rapid	Wash-out	5
7	7T	Irregular	Spiculated	Heterogeneous	Rapid	Wash-out	5
	3T	Irregular	Spiculated	Heterogeneous	Rapid	Wash-out	5
9	7T	Irregular	Spiculated	Heterogeneous	Rapid	Wash-out	5
	3T	Irregular	Spiculated	Heterogeneous	rapid	Wash-out	5
18	7T	Irregular	Spiculated	Heterogeneous	Rapid	Wash-out	5
	3T	Irregular	Spiculated	Heterogeneous	Rapid	Wash-out	5
23	7T	Irregular	Spiculated	Heterogeneous	Rapid	Wash-out	5
	3T	Irregular	Spiculated	Heterogeneous	Rapid	Wash-out	5
25	7T	Irregular	Spiculated	Heterogeneous	Rapid	Wash-out	5
	3T	Irregular	Spiculated	Heterogeneous	Rapid	Wash-out	5

		Non-mass-like enhancement distribution	Internal enhancement	Category
14	7T	Segmental/ductal	Clumped	4/5
	3T	segmental/ductal	Clumped	4/5
22	7T	Segmental	Heterogeneous	4
	3T	Segmental	Heterogeneous	4
		Architectural distortion
26^b	7T	Architectural distortion	No enhancement	4
	3T	Architectural distortion	No enhancement	4

^aRatings by R1 and R2. In case of a discrepancy between observers, both ratings are displayed separated by a slash. In case of a discrepancy between field strengths the case is marked with superscript a
^bTwo malignant lesions in the same patient were described as architectural distortions