| DICOM PS3.3 2024c - Information Object Definitions |
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The RT Patient Position Acquisition Instruction Module contains information required by a Patient Position Acquisition System (PPAS) when specifying acquisition of data to detect the patient position before, during or after the delivery specified by an RT Radiation SOP Instance or Treatment Position Group in a RT Radiation Set IOD Instance.
The RT Patient Position Acquisition Instruction Module consists of a sequence of one or more acquisition tasks. Every acquisition task consists of one or more acquisition subtasks (e.g. two subtasks are required in case of a dual plane acquisition task).
Table C.36.29-1. RT Patient Position Acquisition Instruction Module Attributes
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Include Table 10.32-1 “Entity Long Labeling Macro Attributes” |
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The types and details of acquisitions which are requested by the current Instance. |
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The RT Radiation Set, RT Radiation Instances or the Treatment Position Groups to which the acquisition task is applicable. Required if RT Radiation Set, RT Radiation Instances or Treatment Position Groups exist whose treatment position is guided by this acquisition task. |
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>>Include Table C.36.2.3.3-1 “RT Patient Position Scope With Legacy Support Macro Attributes” |
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The position of the patient when performing this acquisition task. |
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>>Include Table C.36.2.3.2-1 “RT Patient Position Macro Attributes” |
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The types and details of acquisitions which are part of the acquisition task. |
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>>>Include Table 8.8-1 “Code Sequence Macro Attributes” |
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Identifies an acquisition template containing a set of parameters to be used when acquiring data for patient position detection. |
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Code identifying the position acquisition template. Required if Position Acquisition Template ID (3002,0120) not present. May be present otherwise. |
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>>>>Include Table 8.8-1 “Code Sequence Macro Attributes” |
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Identifier of the position acquisition template. Required if Position Acquisition Template Code Sequence (3002,0122) is not present. May be present otherwise. |
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User-defined description of the position acquisition template. |
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>>Referenced Baseline Parameters RT Radiation Instance Sequence |
RT Radiation SOP or RT Plan Instance that defines baseline parameter values for acquisition, which are modified by parameter values increments in this Subtask. Required if Imaging Source Location Specification Type (3002,0111) has the value RELATIVE_PARAMS or Imaging Aperture Specification Type (3002,0115) has the value BEAM or RELATIVE_TO_BEAM. |
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>>>Include Table 10-11 “SOP Instance Reference Macro Attributes” |
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Uniquely identifies the Beam specified by Beam Number (300A,00C0) in the referenced SOP Instance. Required, if the referenced SOP Instance has the SOP Class UID RT Plan ("1.2.840.10008.5.1.4.1.1.481.5") or RT Ion Plan ("1.2.840.10008.5.1.4.1.1.481.8"). |
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The value of Device Index (3010,0039) from the Acquisition Device Sequence (3002,0117) corresponding to the device to be used for acquisition. Required if Number of Acquisition Devices (3002,0116) is greater than one. |
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Point of reference used for measuring the distance to various devices. Required if the current Item contains any Attributes which refer to the Base Beam Modifier Coordinate System. |
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>>>Include Table 8.8-1 “Code Sequence Macro Attributes” |
DCID 9261 “Patient Position Acquisition Radiation Source Locations”. |
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Absolute distance in mm along the z-axis of the Base Beam Modifier Coordinate System from the reference location specified by RT Device Distance Reference Location Code Sequence (300A,0659) to the Beam Modifier Definition Plane. The value shall be greater than or equal to zero. Required if RT Device Distance Reference Location Code Sequence (300A,0659) is present. See Section C.36.1.1.9. |
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>>>Include Table 10-2 “Content Item Macro Attributes” |
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Parameters for kV Imaging Acquisitions. Required if the value of Acquisition Signal Type (3002,0129) is KV. |
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>>>Include Table C.36.2.4.6-1 “KV Radiation Image Acquisition Parameters Macro Attributes” |
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Parameters for MV Imaging Acquisitions. Required if the value of Acquisition Signal Type (3002,0129) is MV. |
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>>>Include Table C.36.2.4.7-1 “MV Radiation Image Acquisition Parameters Macro Attributes” |
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Parameters for Projection Image Acquisitions. Required if the value of Acquisition Method (3002,012A) is PROJECTION. |
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>>>Include Table C.36.2.4.1-1 “RT Projection Imaging Request Geometry Macro Attributes” |
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>>>Include Table C.36.2.4.4-1 “RT Imaging Aperture Macro Attributes” |
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Parameters for CT Image Acquisitions. Required if the value of Acquisition Method (3002,012A) is CT. |
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>>>Include Table C.36.2.4.5-1 “3D RT Cone-Beam Imaging Geometry Macro Attributes” |
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User-specified device-specific acquisition parameters applicable to the device executing this Acquisition Subtask. |
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>>>Include Table 10-2 “Content Item Macro Attributes” |
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Additional devices used during the acquisition of the reference position artifacts. Required if additional RT Accessory Devices are to be used during patient position acquisition. |
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Reference to an Item identified by the Device Index (3010,0039) in the General Accessory Definition Sequence (300A,0671). |
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User-specified device-specific acquisition parameters applicable to the device of the current Item. |
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>>>>Include Table 10-2 “Content Item Macro Attributes” |
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SOP Instances which may be used to provide a positional reference for verification of patient position in the current acquisition subtask. |
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>>>Include Table 10.37-1 “Related Information Entities Macro Attributes” |
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For the codes defined in Table C.36.29.1-1 the number of Items in the Acquisition Subtask Sequence (3002,011A) is determined by the code in the Acquisition Task Workitem Code Sequence (3002,0119) as follows:
Table C.36.29.1-1. Workitem Codes and Subtask Multiplicity
For codes not in this table, the number of Items is not constrained.
| DICOM PS3.3 2024c - Information Object Definitions |
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