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Table 2 Patients and magnetic resonance imaging techniques

From: Can diffusion-weighted imaging predict tumor grade and expression of Ki-67 in breast cancer? A multicenter analysis

Centers No. of patients MRI equipment and field strength DWI sequences and b-values
1 115 1.5-T scanner (MAGNETOM Avanto; Siemens Medical Systems, Erlangen, Germany) Single-shot echo-planar sequence (TR/TE: 7100/84 ms); b-values: 0–1000 s/mm2
2 335 1.5-T scanner (Sonata; Siemens Medical Systems, Erlangen, Germany) Single-shot echo-planar sequence (TR/TE: 5000/110 ms); b-values: 0–1000 s/mm2
3 82 3.0-T scanner (MAGNETOM Verio, Siemens Medical Systems, Erlangen, Germany) Single-shot echo-planar sequence (TR/TE: 7000/85 ms); b-values: 50–1000 s/mm2
4 143 1.5-T scanner (GE Healthcare Life Sciences, Milwaukee, WI, USA) Single-shot echo-planar sequence (TR/TE: 7000/85 ms); b-values: 0–900 s/mm2
5 107 3-T scanner (Achieva TX; Philips Healthcare, Best, The Netherlands) Single-shot echo-planar sequence (TR/TE: 5336/ 61 ms); b-values: 0–800 s/mm2
6 88 3-T scanner (Trio Tim; Siemens Medical Systems, Erlangen, Germany) Single-shot echo-planar sequence (TR/TE: 6600/91 ms); b-values: 0–1000 s/mm2
  1. Abbreviations: MRI Magnetic resonance imaging, DWI Diffusion-weighted imaging, TR Repetition time, TE Echo time