Table 2.

The clinical datasets used in this study consisted of a total of 154 stacks used for testing brain localization and extraction. Motion level has been qualitatively graded “Minor” (little,1, or none,0), “Moderate” (2,3) or “Severe” (4,5,excluded when necessary). A subset of 87 stacks that led to successful baseline reconstruction were further used to evaluate and compare the complete reconstruction pipeline. Selection criteria for a stack to be used in the reconstruction included: homogeneous in-plane and slice resolution in all stacks; stacks with thinner slices in cases where different slice thicknesses where available; fetuses with at least one stack per slice-select acquisition direction; and having no spin history or significant motion-induced intensity distortion artifact that could corrupt the reconstruction. The goal in this paper was not to challenge motion estimation or super-resolution reconstruction but to evaluate the performance of the proposed brain localization and extraction methods and their impact on final reconstruction.

Case	F1	F2	F3	F4	F5	F6	F7	F8	F9	F10	F11	F12	F13	F14	F15	P1	P2	P3	P4	P5
GA (weeks)	27	28	28	29	29	30	30	31	31	32	33	33	34	35	35	25	26	26	30	34
Stacks (Localization-only)	6	7	6	5	6	14	9	7	3	8	11	8	6	9	4	10	4	15	6	10
Motion (0=none,5=severe)	2	5	4	3	3	1	1	2	3	3	3	4	4	3	2	4	1	1	2	2
Stacks (Reconstruction)	5	5	3	4	4	5	6	4	3	6	3	5	5	3	4	4	3	6	4	5