Correlation of the CBF values between CTP and SPECT
| CBF | AIF Unaffected Side | AIF Affected Side | ||||
|---|---|---|---|---|---|---|
| Unaffected Side | Affected Side | Ratio | Unaffected Side | Affected Side | Ratio | |
| bSVD | ||||||
| r2 | 0.58* | 0.46† | 0.70‡ | 0.44 | 0.36 | 0.60* |
| ICC | −0.31 | −0.42 | 0.64‡ | −0.22 | −0.30 | 0.58* |
| sSVD | ||||||
| r2 | 0.52† | 0.22 | 0.50† | 0.46† | 0.08 | 0.40 |
| ICC | 0.25 | −0.36 | 0.02 | 0.43† | 0.02 | 0.03 |
| bMTF | ||||||
| r2 | 0.40 | 0.25 | 0.57* | 0.22 | 0.22 | 0.11 |
| ICC | 0.21 | 0.26 | −0.04 | −0.31 | −0.30 | −0.23 |
Note:—CBF indicates cerebral blood flow; CTP, CT perfusion; SPECT, single-photon emission CT; AIF, arterial input function; bSVD, block-circulant singular value decomposition; SSVD, standard SVD; bMTF, box-modulation transfer function: ICC, intraclass correlation coefficient.
* P < .01.
† P < .05.
‡ P < .001.