Table 3. Cerebral perfusion parameters in white matter regions according to leukoariaosis severity (Fazekas grade).

Characteristics	0 (n = 19)	1 (n = 23)	2 (n = 12)	3 (n = 17)	p value (Grade 1–3)
Relative Cerebral Blood Flow (rCBF)
Periventricular WM rCBF, mean±SD	0.95±0.1	0.89 ±0.1	0.9±0.1	0.86 ±0.1	0.6
PH rCBF, mean±SD	0.87±0.1	0.88 ±0.1	0.88±0.1	0.83±0.1	0.3
Relative Cerebral Blood Volume (rCBV)
Periventricular WM rCBV mean±SD	0.82 ±0.2	0.88 ±0.2	0.77 ±0.2	0.78±0.1	0.1
PH rCBV, mean±SD	0.90±0.1	0.92±0.1	0.91±0.1	0.86±0.2	0.4
Relative Tmax (rTmax), seconds
Periventricular WM rTmax, mean±SD	1.1±0.6	1.3±2.5	2.6±2	3.4±3.5	0.2
PH rTmax, mean±SD	1.6±1	2.3±1.4	2.2±1.3	2±1.9	0.7
Relative Mean Transit Time (rMTT), seconds
Periventricular WM rMTT mean±SD	0.99±0.1	0.92±0.2	0.99±0.5	1±0.2	0.5
PH rMTT mean±SD	1±0.1	0.96±0.1	1±0.2	1±0.3	0.4

WM, white matter; PH, Perihematoma region