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DICOM PS3.3 2020a - Information Object Definitions​

Page 891​

3.​For images where the Field of View describes an area not equal to the size (rows and columns) of the stored Pixel Data​ (7FE0,0010), Detector Binning (0018,701A) does not fully specify the relationship between the contributing physical​ detector pixels and the stored image pixels.​

X-Ray Source

Collimator

Exposed Area

Display Shutter

FOV

Active Area

Detector Matrix

Detector Housing

Figure C.8-14. Explanation of Digital Detector Attributes​

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Page 892​

DICOM PS3.3 2020a - Information Object Definitions​

Physical Area

TLHC

 

(0018,7028)

Active Area

 

 

TLHC

(0018,7030)

Field of View

 

 

TLHC

 

(before rotation/ flip)

Physical Area

TLHC

 

(0018,7028)

Active Area

 

 

TLHC

(0018,7030)

Field of View

 

 

TLHC

 

(before 270 degree rotation)

 

TLHC of (7FE0,0010)

 

after 270 degree rotation

Figure C.8-15. Explanation of Digital Detector Attributes​

C.8.11.5 DX Positioning Module​

Table C.8-72 contains IOD Attributes that describe the positioning used in acquiring Digital X-Ray Images.​

Table C.8-72. DX Positioning Module Attributes​

Attribute Name​

Tag​

Type​

Attribute Description​

Projection Eponymous​

(0018,5104)​

3​ A Sequence that describes the radiographic method of patient, tube and​

Name Code Sequence​

 

 

detector positioning to achieve a well described projection or view.​

 

 

 

Only a single Item is permitted in this Sequence.​

 

 

 

Shall be consistent with the other Attributes in this Module, if present, but​

 

 

 

may more specifically describe the image acquisition.​

>Include Table 8.8-1 “Code Sequence Macro Attributes” .​BCID 4012 “Projection Eponymous Name”.​

Patient Position​

(0018,5100)​

3​ Description of imaging subject's position relative to the equipment.​

 

 

 

See Section C.7.3.1.1.2 for Defined Terms and further explanation.​

If present, shall be consistent with Patient Gantry Relationship Code​ Sequence (0054,0414) and Patient Orientation Modifier Code Sequence​ (0054,0412).​

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DICOM PS3.3 2020a - Information Object Definitions​

Page 893​

Attribute Name​

Tag​

Type​

Attribute Description​

 

View Position​

(0018,5101)​

3​

Radiographic view of the image relative to the imaging subject's​

 

 

 

orientation.​

 

 

 

 

Shall be consistent with View Code Sequence (0054,0220). See​

 

 

 

Section C.8.11.5.1.1 for further explanation.​

 

View Code Sequence​

(0054,0220)​

3​

Sequence that describes the projection of the anatomic region of interest​

 

 

 

on the image receptor.​

 

 

 

 

Note​

 

 

 

 

ItisstronglyrecommendedthatthisAttributebepresent,inorder​

 

 

 

to ensure that images may be positioned correctly relative to​

 

 

 

one another for display.​

 

 

 

 

Shall be consistent with View Position (0018,5101). See​

 

 

 

 

Section C.8.11.5.1.1 for further explanation.​

 

 

 

 

Only a single Item is permitted in this Sequence.​

 

>Include Table 8.8-1 “Code Sequence Macro Attributes” .​BCID 4010 “DX View”.​

 

>View Modifier Code​

(0054,0222)​

3​

View modifier.​

 

Sequence​

 

 

One or more Items are permitted in this Sequence.​

 

 

 

 

 

>>Include Table 8.8-1 “Code Sequence Macro Attributes”​BCID 4011 “DX View Modifier”.​

 

Patient Orientation Code​

(0054,0410)​

3​

Sequence that describes the orientation of the patient with respect to​

Sequence​

 

 

gravity.​

 

 

 

 

See Section C.8.11.5.1.2 for further explanation.​

 

 

 

 

Only a single Item is permitted in this Sequence.​

 

>Include Table 8.8-1 “Code Sequence Macro Attributes” .​BCID 19 “Patient Orientation”.​

 

>Patient Orientation​

(0054,0412)​

3​

Patient Orientation Modifier.​

 

Modifier Code Sequence​

 

 

Requiredifneededtofullyspecifytheorientationofthepatientwithrespect​

 

 

 

 

 

 

to gravity.​

 

 

 

 

Only a single Item is permitted in this Sequence.​

 

>>Include Table 8.8-1 “Code Sequence Macro Attributes”​BCID 20 “Patient Orientation Modifier”.​

 

Patient Gantry​

(0054,0414)​

3​

Sequence that describes the orientation of the patient with respect to the​

Relationship Code​

 

 

gantry.​

 

Sequence​

 

 

Only a single Item is permitted in this Sequence.​

 

 

 

 

 

>Include Table 8.8-1 “Code Sequence Macro Attributes” .​BCID 21 “Patient Equipment Relationship”.​

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Page 894​

DICOM PS3.3 2020a - Information Object Definitions​

Attribute Name​

Tag​

Type​

Attribute Description​

Distance Source to​

(0018,1111)​

3​ Distance in mm from source to the table, support or bucky side that is​

Patient​

 

 

closest to the Imaging Subject, as measured along the central ray of the​

 

 

 

X-Ray beam.​

 

 

 

Note​

 

 

 

1.​Thisdefinitionislessusefulintermsofestimatinggeometric​

 

 

 

magnification than a measurement to a defined point within​

 

 

 

the Imaging Subject, but accounts for what is realistically​

 

 

 

measurable in an automated fashion in a clinical setting.​

 

 

 

2.​This measurement does not take into account any air gap​

 

 

 

between the Imaging Subject and the "front" of the table or​

 

 

 

bucky.​

 

 

 

3.​If the detector is not mounted in a table or bucky, then the​

 

 

 

actual position relative to the patient is implementation or​

 

 

 

operator defined.​

 

 

 

4.​This value is traditionally referred to as Source Object​

 

 

 

Distance (SOD).​

 

 

 

See Section C.8.11.7 for explanation if Positioner Type (0018,1508) is​

 

 

 

MAMMOGRAPHIC.​

Distance Source to​

(0018,1110)​

3​ Distance in mm from source to detector center.​

Detector​

 

 

Note​

 

 

 

 

 

 

This value is traditionally referred to as Source Image Receptor​

 

 

 

Distance (SID).​

 

 

 

See Section C.8.11.7 for explanation if Positioner Type (0018,1508) is​

 

 

 

MAMMOGRAPHIC.​

Estimated Radiographic​

(0018,1114)​

3​ Ratio of Source Image Receptor Distance (SID) over Source Object​

Magnification Factor​

 

 

Distance (SOD).​

Positioner Type​

(0018,1508)​

2​

Defined Terms:​

 

 

 

CARM​

 

 

 

COLUMN​

MAMMOGRAPHIC​

PANORAMIC​

CEPHALOSTAT​

RIGID​

NONE​

Note​

1.​The term CARM can apply to any positioner with 2 degrees​ offreedomofrotationoftheX-RaybeamabouttheImaging​ Subject.​

2.​The term COLUMN can apply to any positioner with 1​ degree of freedom of rotation of the X-Ray beam about the​ Imaging Subject.​

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DICOM PS3.3 2020a - Information Object Definitions​

Page 895​

Attribute Name​

Tag​

Type​

Attribute Description​

 

Positioner Primary Angle​

(0018,1510)​

3​ Position of the X-Ray beam about the patient from the RAO to LAO​

 

 

 

direction where movement from RAO to vertical is positive, if Positioner​

 

 

 

Type (0018,1508) is CARM.​

 

 

 

 

SeeSectionC.8.7.5forfurtherexplanationifPositionerType(0018,1508)​

 

 

 

is CARM.​

 

 

 

 

See Section C.8.11.7 for explanation if Positioner Type (0018,1508) is​

 

 

 

MAMMOGRAPHIC.​

 

Positioner Secondary​

(0018,1511)​

3​ Position of the X-Ray beam about the patient from the CAU to CRA​

Angle​

 

 

direction where movement from CAU to vertical is positive, if Positioner​

 

 

 

Type (0018,1508) is CARM.​

 

 

 

 

SeeSectionC.8.7.5forfurtherexplanationifPositionerType(0018,1508)​

 

 

 

is CARM.​

 

 

 

 

See Section C.8.11.7 for explanation if Positioner Type (0018,1508) is​

 

 

 

MAMMOGRAPHIC.​

 

Detector Primary Angle​

(0018,1530)​

3​ Angle of the X-Ray beam in the row direction in degrees relative to the​

 

 

 

normaltothedetectorplane.PositivevaluesindicatethattheX-Raybeam​

 

 

 

is tilted toward higher numbered columns. Negative values indicate that​

 

 

 

the X-Ray beam is tilted toward lower numbered columns.​

 

 

 

 

See Section C.8.7.5 for further explanation.​

 

 

 

 

See Section C.8.11.7 for explanation if Positioner Type (0018,1508) is​

 

 

 

MAMMOGRAPHIC.​

 

Detector Secondary​

(0018,1531)​

3​ Angle of the X-Ray beam in the column direction in degrees relative to​

Angle​

 

 

the normal to the detector plane. Positive values indicate that the X-Ray​

 

 

 

beamistilted towardlower numberedrows. Negativevalues indicate that​

 

 

 

the X-Ray beam is tilted toward higher numbered rows.​

 

 

 

 

See Section C.8.7.5 for further explanation.​

 

 

 

 

See Section C.8.11.7 for explanation if Positioner Type (0018,1508) is​

 

 

 

MAMMOGRAPHIC.​

 

Column Angulation​

(0018,1450)​

3​ Angle of the X-Ray beam in degree relative to an orthogonal axis to the​

 

 

 

detector plane. Positive values indicate that the tilt is toward the head of​

 

 

 

the table.​

 

 

 

 

Note​

 

 

 

 

The detector plane is assumed to be parallel to the table plane.​

 

 

 

Only meaningful if Positioner Type (0018,1508) is COLUMN.​

Table Type​

(0018,113A)​

3​

Defined Terms:​

 

 

 

 

FIXED​

 

 

 

 

TILTING​

 

 

 

 

NONE​

 

Table Angle​

(0018,1138)​

3​ Angleoftableplaneindegreesrelativetohorizontalplane[Gravityplane].​

 

 

 

Positive values indicate that the head of the table is upward.​

 

 

 

 

Only meaningful if Table Type (0018,113A) is TILTING.​

 

Body Part Thickness​

(0018,11A0)​

3​ The average thickness in mm of the body part examined when​

 

 

 

compressed, if compression has been applied during exposure.​

- Standard -​

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