DICOM PS3.3 2016c - Information Object Definitions

C.8.8.12 RT Patient Setup Module

The RT Patient Setup Module contains information describing the positioning of the patient with respect to the treatment machine, along with any fixation devices used. It also describes the shielding devices applied to the patient. The module contains a sequence of patient setup descriptions, each of which may be referenced by one of more beams or brachy application setups.

Table C.8-48. RT Patient Setup Module Attributes

Attribute Name

Tag

Type

Attribute Description

Patient Setup Sequence

(300A,0180)

1

Sequence of patient setup data for current plan.

One or more Items shall be included in this Sequence.

>Patient Setup Number

(300A,0182)

1

Identification number of the Patient Setup. The value of Patient Setup Number (300A,0182) shall be unique within the RT Plan in which it is created.

>Patient Setup Label

(300A,0183)

3

The user-defined label for the patient setup.

>Patient Position

(0018,5100)

1C

Patient position descriptor relative to the equipment. Required if Patient Additional Position (300A,0184) is not present. See Section C.8.8.12.1.2 for Defined Terms and further explanation.

>Patient Additional Position

(300A,0184)

1C

User-defined additional description of patient position. Required if Patient Position (0018,5100) is not present.

>Referenced Setup Image Sequence

(300A,0401)

3

Sequence of setup verification images for this patient setup.

One or more Items are permitted in this Sequence.

See Section C.8.8.12.1.1

>>Setup Image Comment

(300A,0402)

3

Comment on the Setup Image.

>>Include Table 10-3 “Image SOP Instance Reference Macro Attributes”

>Fixation Device Sequence

(300A,0190)

3

Sequence of Fixation Devices used in Patient Setup.

One or more Items are permitted in this Sequence.

>>Fixation Device Type

(300A,0192)

1

Type of Fixation Device used during in Patient Setup.

Defined Terms:

BITEBLOCK

HEADFRAME

MASK

MOLD

CAST

HEADREST

BREAST_BOARD

BODY_FRAME

VACUUM_MOLD

WHOLE_BODY_POD

RECTAL_BALLOON

>>Fixation Device Label

(300A,0194)

2

User-defined label identifier for Fixation Device.

>>Fixation Device Description

(300A,0196)

3

User-defined description of Fixation Device.

>>Fixation Device Position

(300A,0198)

3

Position/Notch number of Fixation Device.

>>Fixation Device Pitch Angle

(300A,0199)

3

The Fixation Device Pitch Angle, i.e., orientation of PITCHED FIXATION DEVICE coordinate system with respect to IEC PATIENT SUPPORT coordinate system (degrees). Pitching is the rotation around IEC PATIENT SUPPORT X-axis.

>>Fixation Device Roll Angle

(300A,019A)

3

The Fixation Device Roll Angle, i.e., orientation of ROLLED FIXATION DEVICE coordinate system with respect to IEC PITCHED FIXATION DEVICE coordinate system (degrees). Rolling is the rotation around IEC PATIENT SUPPORT Y-axis.

>>Accessory Code

(300A,00F9)

3

An identifier for the accessory intended to be read by a device such as a bar-code reader.

>Shielding Device Sequence

(300A,01A0)

3

Sequence of Shielding Devices used in Patient Setup.

One or more Items are permitted in this Sequence.

>>Shielding Device Type

(300A,01A2)

1

Type of Shielding Device used in Patient Setup.

Defined Terms:

GUM

EYE

GONAD

>>Shielding Device Label

(300A,01A4)

2

User-defined label for Shielding Device.

>>Shielding Device Description

(300A,01A6)

3

User-defined description of Shielding Device.

>>Shielding Device Position

(300A,01A8)

3

Position/Notch number of Shielding Device.

>>Accessory Code

(300A,00F9)

3

An identifier for the accessory intended to be read by a device such as a bar-code reader.

>Setup Technique

(300A,01B0)

3

Setup Technique used in Patient Setup.

Defined Terms:

ISOCENTRIC

FIXED_SSD

TBI

BREAST_BRIDGE

SKIN_APPOSITION

>Setup Technique Description

(300A,01B2)

3

User-defined description of Setup Technique.

>Setup Device Sequence

(300A,01B4)

3

Sequence of devices used for patient alignment in Patient Setup.

One or more Items are permitted in this Sequence.

>>Setup Device Type

(300A,01B6)

1

Type of Setup Device used for Patient alignment.

Defined Terms:

LASER_POINTER

DISTANCE_METER

TABLE_HEIGHT

MECHANICAL_PTR

ARC

>>Setup Device Label

(300A,01B8)

2

User-defined label for Setup Device used for patient alignment.

>>Setup Device Description

(300A,01BA)

3

User-defined description for Setup Device used for patient alignment.

>>Setup Device Parameter

(300A,01BC)

2

Setup Parameter for Setup Device in appropriate IEC 61217 coordinate system.

Units shall be mm for distances and degrees for angles.

>>Setup Reference Description

(300A,01D0)

3

User-defined description of Setup Reference used for patient alignment.

>>Accessory Code

(300A,00F9)

3

An identifier for the accessory intended to be read by a device such as a bar-code reader.

>Table Top Vertical Setup Displacement

(300A,01D2)

3

Vertical Displacement in IEC TABLE TOP coordinate system (in mm) relative to initial Setup Position, i.e., vertical offset between patient positioning performed using setup and treatment position.

>Table Top Longitudinal Setup Displacement

(300A,01D4)

3

Longitudinal Displacement in IEC TABLE TOP coordinate system (in mm) relative to initial Setup Position, i.e., longitudinal offset between patient positioning performed using setup and treatment position.

>Table Top Lateral Setup Displacement

(300A,01D6)

3

Lateral Displacement in IEC TABLE TOP coordinate system (in mm) relative to initial Setup Position, i.e., lateral offset between patient positioning performed using setup and treatment position.

>Motion Synchronization Sequence

(300A,0410)

3

Sequence of Motion Synchronization.

One or more Items are permitted in this Sequence.

>>Respiratory Motion Compensation Technique

(0018,9170)

1

Technique applied to reduce respiratory motion artifacts.

Defined Terms:

NONE

BREATH_HOLD

REALTIME

image acquisition shorter than respiratory cycle

GATING

Prospective gating

TRACKING

prospective through-plane or in-plane motion tracking

PHASE_ORDERING

prospective phase ordering

PHASE_RESCANNING

prospective techniques, such as real-time averaging, diminishing variance and motion adaptive gating

RETROSPECTIVE

retrospective gating

CORRECTION

retrospective image correction

UNKNOWN

technique not known

>>Respiratory Signal Source

(0018,9171)

1

Signal source from which respiratory motion is derived.

Defined Terms:

NONE

BELT

NASAL_PROBE

CO2_SENSOR

NAVIGATOR

MR navigator and organ edge detection

MR_PHASE

phase (of center k-space line)

ECG

baseline demodulation of the ECG

SPIROMETER

Signal derived from flow sensor

EXTERNAL_MARKER

Signal determined from external motion surrogate

INTERNAL_MARKER

Signal determined from internal motion surrogate

IMAGE

Signal derived from an image

UNKNOWN

Signal source not known

>>Respiratory Motion Compensation Technique Description

(0018,9185)

3

Description of respiratory motion compensation technique.

>>Respiratory Signal Source ID

(0018,9186)

3

Identifies the device providing the respiratory signal.


C.8.8.12.1 RT Patient Setup Module Attributes
C.8.8.12.1.1 Referenced Setup Image Sequence

Images with modality SC or VL serve as visible light photos for visual setup control. Images with modality RTIMAGE serve as reference images on plan level. RT Images present in this Sequence shall not be referenced in the Referenced Reference Image Sequence (300C,0042) of the RT Beams Module.

C.8.8.12.1.2 Patient Position

Defined Terms for Patient Position shall be those specified in Section C.7.3.1.1.2, plus the following:

Defined Terms:

SITTING

In the sitting position, the patient's face is towards the front of the chair

DICOM PS3.3 2016c - Information Object Definitions