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 ) ) [28052d44-8274-401b-8ec1-f53626841ae4] => Array ( [runtime-id] => 28052d44-8274-401b-8ec1-f53626841ae4 [type] => toll-free-key [service-id] => ajnr-ac.highwire.org [access-type] => Controlled [privilege] => Array ( [920f3cef-cf06-4d4a-b2ad-cd757f4b30a6] => Array ( [runtime-id] => 920f3cef-cf06-4d4a-b2ad-cd757f4b30a6 [type] => toll-free-key ) ) [credentials] => Array ( [method] => toll-free-key [value] => tf_ipsecsha;e18403e00c4fdd4abae65a50e0d8ba828551cae7 ) ) ) 1naresh2naresh

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
                )

        )

    [28052d44-8274-401b-8ec1-f53626841ae4] => Array
        (
            [runtime-id] => 28052d44-8274-401b-8ec1-f53626841ae4
            [type] => toll-free-key
            [service-id] => ajnr-ac.highwire.org
            [access-type] => Controlled
            [privilege] => Array
                (
                    [920f3cef-cf06-4d4a-b2ad-cd757f4b30a6] => Array
                        (
                            [runtime-id] => 920f3cef-cf06-4d4a-b2ad-cd757f4b30a6
                            [type] => toll-free-key
                        )

                )

            [credentials] => Array
                (
                    [method] => toll-free-key
                    [value] => tf_ipsecsha;e18403e00c4fdd4abae65a50e0d8ba828551cae7
                )

        )

)

Table 4: BT site of involvement and temporal characteristics^{^a}
Groups Superior Middle Inferior Temporal-Improving^{^b} Temporal-Transient^{^c}
FS 6 16 5 11
Brain 8 28 13 16
↵a The location of the black turbinates and the change in enhancement during multiple series are shown. Because a patient can demonstrate BT in >1 turbinate (ie, both the middle and inferior turbinates can show BT simultaneously), the total number of turbinates seen with BT is larger than the number of cases in each group.
↵b BT persists across all sequences but improves gradually.
↵c BT resolves on later sequences.