Regional Cerebral Blood Flow Using Quantitative MR Angiography

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Fig 1.
The 6 section planes showing where the flow measurements were made for the 6 neck vessels..
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Fig 2.
The 7 section planes showing where the flow measurements were made for the 7 head vessels..
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Fig 3.
Partition tree of the cerebral circulation.
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Fig 4.
The relative contribution of flows in each of 11 regions to its parent region.

Table 3:

Flows of either individual arteries or regions decreased with age

Artery or Region	P	Youngest Group, mL/min	Oldest Group, mL/min
LCCA	< .01	423 ± 86	349 ± 51
LVA	< .01	125 ± 35	69 ± 39
LICA	< .03	296 ± 45	221 ± 49
BA	< .03	164 ± 25	118 ± 15
LACA	< .01	101 ± 28	67 ± 20
CC^r	< .02	1047 ± 178	905 ± 129
IC^r	< .02	788 ± 102	621 ± 71
AC^r	< .02	559 ± 74	433 ± 52
PC^r	< .03	229 ± 32	188 ± 23

Note:—LCCA indicates left common carotid artery; LVA, left vertebral artery; LICA, left internal carotid artery; BA, basilar artery; LACA, left anterior cerebral region; CC^r, cranial circulation region; IC^r, intracranial circulation region; AC^r, anterior circulation region; PC^r, posterior circulation region.

Table 4:

Gender differences in flows of either individual arteries or regions

Artery or Region	Flow (Female), mL/min	Flow (Male), mL/min	Hypotheses	P
LCCA	366 ± 64	414 ± 73	F ≤ M	< .001
RCCA	345 ± 56	419 ± 82	F ≤ M	< .0001
CC^r	897 ± 139	1006 ± 161	F ≤ M	< .001
LEC^r	99 ± 53	154 ± 56	F ≤ M	< .0001
REC^r	96 ± 41	164 ± 65	F ≤ M	< .0001

Note:—LCCA indicates left common carotid artery; RCCA, right common carotid artery; CC^r, cranial circulation region; LEC^r, left extracranial circulation; REC^r, right extracranial circulation. F ≤ M (or F ≥ M) indicates that the flow for the female group is lower (or higher) than the flow for male group.