BMMR2: Breast Multiparametric MRI for prediction of NAC Response Forum

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> Doubts about Test/Retest set

I have a couple of questions, mainly regarding the Test/Retest set:
1) At which time point was the Test/Retest data acquired? By looking at some of the data, it seems to have been acquired at T0 exclusively, but looking at the TCIA description, there were test/retest acquisitions at T0 and T1.
2) If Test/Retest data was all acquired at T0, then any metric using T1 and/or T2 data should not be required to be evaluated in this set, right?
3) Is it allowed to make a publication with my results on the challenge?
Thank you for your help,
Oscar.

Posted by: OscarPV @ Nov. 19, 2021, 3:46 p.m.

Hi Oscar:
1) Test/retest was allowed at T0 or T1, with T0 being the preferred time point. I believe the final distribution was of the analyzable test/retest studies is 60 T0 and 11 T1, but you can check with the study description field, or the appropriate DICOM Trial Timepoint fields in group 0012, I forget the exact tag numbers.
2) No need to evaluate for metrics requiring T1 or T2. The 11 T1 test/retest cases is too low an N to give any meaningful results I believe.
3) individual publications are certainly permissible, but it may be necessary to hold off on the actual publication until the full 6698 data set is made publicly available. That will be on April 1, 2022. We have a meeting tomorrow - I'll try to get a definitive answer on this question then.

thanks for participating in the BMMR2. Let us know if you have any more questions.
David

Posted by: Newitt @ Nov. 22, 2021, 6:48 p.m.
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