There exist significant differences in the manner in which RT objects as compared to diagnostic objects. An RT object can be one of several types, and a series of a given object type may be created over a temporal span of several weeks. The RT Series Module has been created to satisfy the requirements of the standard DICOM Query/Retrieve model while including only those attributes relevant to the identification and selection of radiotherapy objects.
Table C.8-37 - RT SERIES MODULE ATTRIBUTES
|Attribute Name||Tag||Type||Attribute Description|
|Modality||(0008,0060)||1||Type of equipment that originally acquired the data. Enumerated Values: RTIMAGE = RT Image RTDOSE = RT Dose RTSTRUCT = RT Structure Set RTPLAN = RT Plan RTRECORD = RT Treatment Record See C.184.108.40.206.|
|Series Instance UID||(0020,000E)||1||Unique identifier of the series.|
|Series Number||(0020,0011)||2||A number that identifies this series.|
|Series Description||(0008,103E)||3||Description of the series.|
|Series Description Code Sequence||(0008,103F)||3||A coded description of the Series. Only a single Item is permitted in this sequence.|
|>Include Code Sequence Macro Table 8.8-1||No Baseline Context ID is defined.|
|Operators’ Name||(0008,1070)||2||Name(s) of the operator(s) supporting the Series.|
|Referenced Performed Procedure Step Sequence||(0008,1111)||3||Uniquely identifies the Performed Procedure Step SOP Instance to which the Series is related (e.g. a Modality or General-Purpose Performed Procedure Step SOP Instance). One or more items are permitted in this sequence.|
|>Include ‘SOP Instance Reference Macro' Table 10-11|
|Request Attributes Sequence||(0040,0275)||3||Sequence that contains attributes from the Imaging Service Request. One or more Items are permitted in this sequence.|
|>Include Request Attributes Macro Table 10-9||No Baseline Context ID is defined|
|Include Performed Procedure Step Summary Macro Table 10-16||No Baseline Context ID is defined|
The Enumerated Value for Modality (0008,0060) shall determined by the IOD:
RTIMAGE if RT Image IOD,
RTDOSE if RT Dose IOD,
RTSTRUCT if RT Structure Set IOD,
RTPLAN if RT Plan IOD or RT Ion Plan IOD,
RTRECORD if RT Beams Treatment Record IOD, RT Ion Beams Treatment Record IOD, RT Brachy Treatment Record IOD, or RT Treatment Summary Record IOD.
Note: DICOM specifies that a given series shall contain objects of only one Modality, and shall be created by a single device (described in the General Equipment Module). However, in general there may be many series defined for a given modality/device pair. Note that a radiotherapy series is generally created over an extended time interval (unlike in radiology, where all images in an image series are generally created together).