DICOM PS3.18 2019a - Web Services

8.2.2.2 Number of Pixel Columns

The parameter name shall be "columns" for URI mode.

The value shall be expressed as an integer, representing the image width to be returned. It is OPTIONAL for the URI mode. It shall not be present if contentType is application/dicom.

If both "rows" and "columns" are specified, then each shall be interpreted as a maximum, and a size will be chosen for the images within these constraints, maintaining the correct aspect ratio. If the number of columns is absent and the number of rows is present, the number of columns shall be chosen in order to maintain the correct aspect ratio. If both are absent, the images (or selected region) is sent in its original size (or the size of the presentation state applied on the images), resulting as one pixel of screen for one pixel of the images.

The value shall be encoded as an integer string (IS), as specified in PS3.5.

DICOM PS3.18 2019a - Web Services