. Author manuscript; available in PMC: 2010 Sep 27.

Published in final edited form as: Magn Reson Med. 2009 Jun;61(6):1374–1387. doi: 10.1002/mrm.21960

Table 3.

Test-retest repeatability, COV_F, of perfusion calculations including retrospective sorting of ASL images based on respiratory position. Various sorting schemes are shown as well as a reference scheme which includes all acquired images.

Reference	Retrospective Sorting Scheme Criterion

Timed Breathing	First Set	End-Expiration	Median Position	Closest Together
6.6 %	5.4 %	1.7 % ^*	6.8 %	2.5 % ^†

Significantly lower measurement variance when compared to all other schemes:

1% level for the F-test,

^†

5% level