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. 2014 Oct 28;41(11):111717. doi: 10.1118/1.4898602

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© 2014 American Association of Physicists in Medicine.

0094-2405/2014/41(11)/111717/9/$30.00

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FIG. 8. — Correlation between breathing periodicity index (BPI-5) and motion-artifact severity MAS (A), MAS^D (normalized to displacement) (B), and MAS^V (normalized to velocity) (C). As the uncertainties in BPI and MAS are similar, a linear regression treating BPI and MAS equally is applied using SVD (singular value decomposition). Nevertheless, the linear fitting does not affect the correlation between BPI and MAS.