1naresh<pre>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<pre>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] => FreeToRead
            [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<pre>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
                )

        )

)
Perspectives
============

* Jeffrey S. Ross

![Figure1](http://www.ajnr.org/http://ajnr-stage2.stage.highwire.org/content/ajnr/44/3/235/F1.medium.gif)

[Figure1](http://www.ajnr.org/content/44/3/235/F1)

Title: The Great Barred Spiral Galaxy (NGC 1365) is a double-barred spiral galaxy in the constellation of Fornax. The galaxy has an active galactic nucleus (AGN) due to a supermassive black hole that is thought to be about 2 million solar masses. This image was acquired as a series of 125 5-minute exposures (10 hours) using red, green, and blue filters. The telescope was a Planewave 20” corrected Dall-Kirkham Astrograph, f/4.4 on a Planewave Ascension 200HR mount situated in Australia. The camera was a FLI ProLine PL09000 CCD, with Astrodon filters. The images were processed using PixInsight, Photoshop, and Topaz Labs Adjust AI and DeNoise AI.

*   © 2023 by American Journal of Neuroradiology