Skip to main content
. Author manuscript; available in PMC: 2007 Apr 11.
Published in final edited form as: Radiology. 2005 Mar;234(3):909–916. doi: 10.1148/radiol.2343031499

TABLE 1.

Reliability, Reproducibility, and Random Noise of Perfusion-weighted Imaging Measurements Obtained with Different Pulsed ASL Methods

Brain Region and
Measurement Parameter*
DIPLOMA EPISTAR PICORE
Global brain
ICC 0.81 (0.61, 0.96) 0.78 (0.41, 0.93) 0.78 (0.40, 0.92)
WSC  0.06 0.01 0.01
Noise  0.13 0.21 0.21
CV (%) 7.07 6.11 8.26
Gray matter 
ICC 0.80 (0.63, 0.96) 0.75 (0.34, 0.92) 0.76 (0.33, 0.92)
WSC  0.09 0.01 0.01
Noise  0.11 0.24 0.23
CV (%) 6.77 6.13 8.42
White matter
ICC 0.80 (0.50, 0.94) 0.79 (0.44, 0.93) 0.79 (0.40, 0.93)
WSC  0.03 0.01 0.02
Noise  0.17 0.20 0.19
CV (%) 7.74 6.31 8.38
*

ICC, a measure of reliability; WSC, a measure of reproducibility; and noise are indexes of total variability and vary between 0 and 1. CV, an alternative measure of reproducibility, is a percentage of the mean value.

Numbers in parentheses are 95% confidence intervals. For the other measures, the confidence intervals (not listed) scale with the ratio of their mean values to the mean value of the ICC.

HHS Vulnerability Disclosure