DELTA

[Array
(
    [ID] => 724
    [IMAGEID] => 6357345
    [WIDTH] => 300
    [HEIGHT] => 300
    [TYPE] => image/png
    [MODULE] => iblock
    [ENTITY] => 28
    [OBJECT] => 23622
    [FIELD] => PREVIEW_PICTURE
    [DATE] => Bitrix\Main\Type\DateTime Object
        (
            [value:protected] => DateTime Object
                (
                    [date] => 2019-03-06 17:20:55.000000
                    [timezone_type] => 3
                    [timezone] => Europe/Moscow
                )

        )

    [HASH] => 
    [ITEM] => element
    [TAG] => original
)
]

[Array
(
    [ID] => 727
    [IMAGEID] => 5553087
    [WIDTH] => 300
    [HEIGHT] => 300
    [TYPE] => image/png
    [MODULE] => iblock
    [ENTITY] => 28
    [OBJECT] => 23623
    [FIELD] => PREVIEW_PICTURE
    [DATE] => Bitrix\Main\Type\DateTime Object
        (
            [value:protected] => DateTime Object
                (
                    [date] => 2019-03-06 17:20:55.000000
                    [timezone_type] => 3
                    [timezone] => Europe/Moscow
                )

        )

    [HASH] => 
    [ITEM] => element
    [TAG] => original
)
]