Table 1.

Number of scans at 6 and 12 months (equal for accelerated and nonaccelerated) broken down by vendor sequence (nonaccelerated/accelerated) and by diagnosis. AD denotes Alzheimer’s disease, EMCI and LMCI denote early and late mild cognitive impairment, and CN denotes healthy controls.

6 Months	Diagnosis
Scanner Vendor (accel/nonaccel sequence)	AD	EMCI	LMCI	CN	Total
GE (IR_FSPGR/ASSET)	7	15	12	27	61
Philips (MPRAGE/SENSE)	6	15	23	29	73
Siemens (MPRAGE/GRAPPA)	16	64	57	74	211
Total	29	94	92	130	345
12 Months
Scanner Vendor (accel/nonaccel sequence)	AD	EMCI	LMCI	CN	Total
GE (IR_FSPGR/ASSET)	2	6	4	8	20
Philips (MPRAGE/SENSE)	3	8	11	15	37
Siemens (MPRAGE/GRAPPA)	8	33	23	35	99
Total	13	47	38	58	156