Array ( [urn:ac.highwire.org:guest:identity] => Array ( [runtime-id] => urn:ac.highwire.org:guest:identity [type] => guest [service-id] => ajnr-ac.highwire.org [access-type] => Controlled [privilege] => Array ( [urn:ac.highwire.org:guest:privilege] => Array ( [runtime-id] => urn:ac.highwire.org:guest:privilege [type] => privilege-set [privilege-set] => GUEST ) ) [credentials] => Array ( [method] => guest ) ) ) 1naresh

Array
(
    [urn:ac.highwire.org:guest:identity] => Array
        (
            [runtime-id] => urn:ac.highwire.org:guest:identity
            [type] => guest
            [service-id] => ajnr-ac.highwire.org
            [access-type] => Controlled
            [privilege] => Array
                (
                    [urn:ac.highwire.org:guest:privilege] => Array
                        (
                            [runtime-id] => urn:ac.highwire.org:guest:privilege
                            [type] => privilege-set
                            [privilege-set] => GUEST
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                )

            [credentials] => Array
                (
                    [method] => guest
                )

        )

)

Table 2: Quantitative analysis^{^a}
70 kVp 80 kVp P Value
CBF 
    WM 
        Mean 5.47 8.76 .05
        SD 2.26 4.47 .35
        SNR 2.81 3.20 .66
    GM 
        Mean 40.03 40.76 .87
        SD 14.84 16.94 .94
        SNR 4.38 3.95 .92
CBV 
    WM 
        Mean 1.50 0.95 .44
        SD 0.41 0.35 .21
        SNR 3.15 4.97 .07
    GM 
        Mean 4.88 3.49 .75
        SD 1.45 1.08 .21
        SNR 5.34 6.53 .18
Tmax 
    WM 
        Mean 7.81 6.52 .10
        SD 1.72 1.63 .47
        SNR 6.22 7.08 .96
    GM 
        Mean 3.94 4.51 .13
        SD 0.68 1.03 .31
        SNR 6.82 6.72 .82
Arterial max 
    Thalamus 
        Mean 59.71 50.25 .0005
        SD 11.96 11.34 .426
        SNR 6.43 4.69 .3316
Venous max 
    Thalamus 
        Mean 56.72 48.68 .0032
        SD 11.67 10.91 .3811
        SNR 5.11 4.62 .4738
Note:—max indicates maximum; Tmax, time-to-maximum.
↵a Data are presented as mean, SD, and SNR.

	70 kVp	80 kVp	P Value
CBF
WM
Mean	5.47	8.76	.05
SD	2.26	4.47	.35
SNR	2.81	3.20	.66
GM
Mean	40.03	40.76	.87
SD	14.84	16.94	.94
SNR	4.38	3.95	.92
CBV
WM
Mean	1.50	0.95	.44
SD	0.41	0.35	.21
SNR	3.15	4.97	.07
GM
Mean	4.88	3.49	.75
SD	1.45	1.08	.21
SNR	5.34	6.53	.18
Tmax
WM
Mean	7.81	6.52	.10
SD	1.72	1.63	.47
SNR	6.22	7.08	.96
GM
Mean	3.94	4.51	.13
SD	0.68	1.03	.31
SNR	6.82	6.72	.82
Arterial max
Thalamus
Mean	59.71	50.25	.0005
SD	11.96	11.34	.426
SNR	6.43	4.69	.3316
Venous max
Thalamus
Mean	56.72	48.68	.0032
SD	11.67	10.91	.3811
SNR	5.11	4.62	.4738