Table 1.

Summary of the raw MRI k-space datasets used in the first edition of the challenge.

Coil	Category	# of datasets	# of slices
12-channel	Train	47	12,032
	Validation	20	5,120
	Test	50	7, 800
32-channel	Test	50	7, 800

Reported are the number of slices in the test sets after removal of the initial 50 and last 50 slices (see text).