DICOM PS3.2 2019b - Conformance
G.4.2.3.3 Association Initiation Policy

FIND-SCU attempts to initiate a new association when a study is received for which an appropriate Hanging Protocol Instance is not already stored in the local database.

G.4.2.3.3.1 Activity - Query Remote AE
G.4.2.3.3.1.1 Description and Sequencing of Activities

A single attempt will be made to query the remote AE. If the query fails, for whatever reason, no retry will be performed.

G.4.2.3.3.1.2 Proposed Presentation Contexts

Table G.4.2-17. Proposed Presentation Contexts for FIND-SCU and Query Remote AE

Presentation Context Table

Abstract Syntax

Transfer Syntax

Role

Extended Negotiation

Name

UID

Name

UID

See Table G.4.2-13

See Table G.4.2-13

Implicit VR Little Endian

1.2.840.10008.1.2

SCU

None

Explicit VR Little Endian

1.2.840.10008.1.2.1


FIND-SCU will propose multiple Presentation Contexts, one for each of the supported Transfer Syntaxes, and an additional Presentation Context with all of the supported Transfer Syntaxes, in order to determine which Transfer Syntaxes the remote SCP supports, and which it prefers.

G.4.2.3.3.1.2.1 Extended Negotiation

No extended negotiation is performed.

G.4.2.3.3.1.3 SOP Specific Conformance
G.4.2.3.3.1.3.1 SOP Specific Conformance to C-FIND SOP Classes

FIND-SCU provides standard conformance to the supported C-FIND SOP Class.

The following applies to Hanging Protocol Information Model C-FIND.

If present in the response, Specific Character Set will be used to identify character sets other than the default character set for matching between Hanging Protocol and Image Instances.

Table G.4.2.3.3.1.3.1-1. Hanging Protocol Information Model C-FIND SOP Specific Conformance

Name

Tag

Types of Matching

SOP Class UID

(0008,0016)

zero length

SOP Instance UID

(0008,0018)

zero length

Hanging Protocol Name

(0072,0002)

S, *, U

Hanging Protocol Description

(0072,0004)

zero length

Hanging Protocol Level

(0072,0006)

S, U

Hanging Protocol Creator

(0072,0008)

zero length

Hanging Protocol Creation Datetime

(0072,000A)

zero length

Hanging Protocol Definition Sequence

(0072,000C)

SQ, U

>Modality

(0008,0060)

From list (US, MR, MG) or zero length

>Anatomic Region Sequence

(0008,2218)

From CID 4 “Anatomic Region” or zero length

>> Code Value

(0008,0100)

S, U

>> Coding Scheme Designator

(0008,0102)

S, U

>>Coding Scheme Version

(0008,0103)

zero length

>>Code Meaning

(0008,0104)

zero length

>Laterality

(0020,0060)

From list (R, L, U, B) or zero length

> Procedure Code Sequence

(0008,1032)

zero length

>Reason for Requested Procedure Code Sequence

(0040,100A)

zero length

Number of Priors Referenced

(0072,0014)

zero length

Hanging Protocol User Identification Code Sequence

(0072,000E)

From list of local coded terms or zero length

>Code Value

(0008,0100)

S, U

>Coding Scheme Designator

(0008,0102)

S, U

>Coding Scheme Version

(0008,0103)

zero length

>Code Meaning

(0008,0104)

zero length

Hanging Protocol User Group Name

(0072,0010)

zero length

Number of Screens

(0072,0100)

zero length

Nominal Screen Definition Sequence

(0072,0102)

zero length


G.4.2.3.3.1.3.2 Presentation Context Acceptance Criterion

FIND-SCU does not accept associations.

G.4.2.3.3.1.3.3 Transfer Syntax Selection Policies

FIND-SCU prefers explicit Transfer Syntaxes. If offered a choice of Transfer Syntaxes in the accepted Presentation Contexts, it will apply the following priority to the choice of Presentation Context to use for the C-FIND operation:

  1. first encountered explicit Transfer Syntax,

  2. default Transfer Syntax.

G.4.2.3.3.1.3.4 Response Status

FIND-SCU will behave as described in Table G.4.2-19 in response to the status returned in the C-FIND response command message(s).

Table G.4.2-19. Response Status for FIND-SCU and Query Remote AE Request

Service Status

Further Meaning

Status Codes

Behavior

Refused

Out of Resources

A700

Current query is terminated; remaining queries continue

Error

Identifier does not match SOP Class

A900

Current query is terminated; remaining queries continue

Unable to process

Cxxx

Current query is terminated; remaining queries continue

Cancel

Matching terminated due to Cancel request

FE00

Ignored (should never occur, since cancels never issued)

Success

Matching is complete - No final Identifier is supplied

0000

Current query is terminated. If one or more Pending responses were received, logic is applied to trigger Retrieve of best suited Hanging Protocol Instances; remaining queries continue

Pending

Matches are continuing - Current Match is supplied and any Optional Keys were supported in the same manner as Required Keys

FF00

Identifier stored temporarily for use in setting up Retrieve.

Matches are continuing - Warning that one or more Optional Keys were not supported for existence and/or matching for this Identifier

FF01

Identifier stored temporarily for use in setting up Retrieve


DICOM PS3.2 2019b - Conformance