DICOM PS3.18 2019a - Web Services Search Transaction

The Search transaction searches the collection of NPI Instances contained in the target resource. The search criteria are specified in the query parameters. Each match includes the default and requested attributes from the matching Instance. A successful response returns a list describing the matching Instances. Request

The Search transaction uses the GET method and has the following syntax:

    GET SP /{npi-name} {?parameter*} SP version CRLF
    Accept: 1#dicom-media-type CRLF
    *(header-field CRLF)
    CRLF Resources

The target URL shall reference one of the resources shown in Table

An origin server shall specify all supported npi-names in its Conformance Statement and in its response to the Retrieve Capabilities transaction.

Table Resources and URI Templates


URI Template


All Instances


Searches a collection of NPI Instances Query Parameters

The parameters in the query component of the target URL specify the matching criteria, the attribute values to be returned, and the results to be returned. The URI template for the query parameters is:

    {?parameter*} = "?" {&match*} {&include*} {&offset} {&limit}

See Section, “Request” for a description of the syntax of Search Query Parameters. Attributes and Behaviors

For each Resource Category the origin server supports, it shall support the behaviors and matching key attributes specified in the corresponding sections in Table

Table NPI Resource Search Attributes

Resource Category

Defined Attributes and Matching Key Types

Color Palette

X.6.1.2 in PS3.4

Defined Procedure Protocol

HH.6.1.2 in PS3.4

Hanging Protocol

U.6.1.2 in PS3.4

Implant Template

BB.6.1.2 in PS3.4 Request Header Fields

Table Search Request Header Fields

Header Field





M Request Payload

The request has no payload.

DICOM PS3.18 2019a - Web Services