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
                        )

                )

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

        )

)

Table 4: 
Statistical differences (P values) between the regular- and lower-dose CT groups
Radiation Dose Reconstruction Technique Quantitative Measurements (P values)
GM-SNR WM-SNR GM-WM CNR
Regular (175 mAs) 100% FBP Control group 
100% FBP .003^a .003^a .4
20% ASIR + 80% FBP .649 .541 1
Lower-Dose (140 mAs) 40% ASIR + 60% FBP .302 .668 .03^a
60% ASIR + 40% FBP <.0001^a <.0001^a <.0001^a
80% ASIR + 20% FBP <.0001^a <.0001^a <.0001^a
100% ASIR <.0001^a <.0001^a <.0001^a


↵a Statistical significance between the lower-dose (with different ASIR/FBP levels) and regular-dose groups.

Radiation Dose	Reconstruction Technique	Quantitative Measurements (P values)
Radiation Dose	Reconstruction Technique	GM-SNR	WM-SNR	GM-WM CNR
Regular (175 mAs)	100% FBP		Control group
	100% FBP	.003^a	.003^a	.4
	20% ASIR + 80% FBP	.649	.541	1
Lower-Dose (140 mAs)	40% ASIR + 60% FBP	.302	.668	.03^a
	60% ASIR + 40% FBP	<.0001^a	<.0001^a	<.0001^a
	80% ASIR + 20% FBP	<.0001^a	<.0001^a	<.0001^a
	100% ASIR	<.0001^a	<.0001^a	<.0001^a