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DICOM PS3.3 2020a - Information Object Definitions​

Page 1051​

BIPLANE​ Image is part of a Bi-plane acquisition​

UNDEFINED​ Image is created by using data from one or two planes (e.g., reconstructed projection). May only be used when​ Image Type Value 1 equals DERIVED.​

C.8.19.3 XA/XRF Acquisition Module​

Table C.8.19.3-1 specifies the Attributes of the XA/XRF Acquisition Module.​

Table C.8.19.3-1. XA/XRF Acquisition Module Attributes​

Attribute Name​

Tag​

Type​

Attribute Description​

KVP​

(0018,0060)​

1​

Average of the peak kilo voltage outputs of the X-Ray generator used for​

 

 

 

all frames.​

Radiation Setting​

(0018,1155)​

1​

Identify the general level of X-Ray dose exposure.​

 

 

 

Enumerated Values:​

 

 

 

SC​low dose exposure generally corresponding to fluoroscopic settings​

 

 

 

(e.g., preparation for diagnostic quality image acquisition)​

 

 

 

GR​high dose for diagnostic quality image acquisition (also called digital​

 

 

 

spot or cine)​

X-RayTubeCurrentinmA​

(0018,9330)​

1C​

Average of the nominal X-Ray tube currents in milliamperes for all frames.​

 

 

 

Required if Exposure in mAs (0018,9332) is not present. May be present​

 

 

 

otherwise.​

Exposure Time in ms​

(0018,9328)​

1C​

Duration of X-Ray exposure in milliseconds. See Section C.8.7.2.1.1.​

 

 

 

Required if Exposure in mAs (0018,9332) is not present. May be present​

 

 

 

otherwise.​

Exposure in mAs​

(0018,9332)​

1C​

The exposure expressed in milliampereseconds, for example calculated​

 

 

 

from Exposure Time and X-Ray Tube Current.​

 

 

 

RequiredifeitherExposureTimeinms(0018,9328)orX-RayTubeCurrent​

 

 

 

in mA (0018,9330) are not present. May be present otherwise.​

Average Pulse Width​

(0018,1154)​

1​

Average width of X-Ray pulse in msec.​

Acquisition Duration​

(0018,9073)​

1​

The time in seconds needed for the complete acquisition.​

 

 

 

See Section C.7.6.16.2.2.1 for further explanation​

Radiation Mode​

(0018,115A)​

1​

Specifies X-Ray radiation mode.​

 

 

 

Defined Terms:​

 

 

 

CONTINUOUS​

 

 

 

PULSED​

Focal Spot(s)​

(0018,1190)​

3​

Nominal focal spot size in mm used to acquire this image.​

Anode Target Material​

(0018,1191)​

3​

The primary material in the anode of the X-Ray source.​

 

 

 

Defined Terms:​

TUNGSTEN​

MOLYBDENUM​

RHODIUM​

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Page 1052​

DICOM PS3.3 2020a - Information Object Definitions​

Attribute Name​

Tag​

Type​

Attribute Description​

Rectification Type​

(0018,1156)​

3​

Type of rectification used in the X-Ray generator.​

 

 

 

Defined Terms:​

 

 

 

SINGLE PHASE​

 

 

 

THREE PHASE​

 

 

 

CONSTPOTENTIAL​

X-Ray Receptor Type​

(0018,9420)​

1​

Identifies with type of X-Ray receptor is used.​

 

 

 

Enumerated Values:​

 

 

 

IMG_INTENSIFIER​

 

 

 

DIGITAL_DETECTOR​

Distance Receptor Plane​

(0018,9426)​

2​

Distance in mm between the receptor plane and the detector housing. The​

to Detector Housing​

 

 

direction of the distance is positive from receptor plane to X-Ray source.​

 

 

 

 

Note​

 

 

 

 

1.​Anegative valueis allowedinthe caseof an imageintensifier​

 

 

 

 

the receptor plane can be a virtual plane located outside the​

 

 

 

 

detector housing depending the magnification factor of the​

 

 

 

 

intensifier. A negative value is not applicable for the digital​

 

 

 

 

detector.​

 

 

 

 

2.​Used to calculate the pixel size of the plane in the patient​

 

 

 

 

when markers are used, and they are placed on the detector​

 

 

 

 

housing.​

Positioner Type​

(0018,1508)​

1​

Defined Terms:​

 

 

 

CARM​

 

 

 

COLUMN​

 

 

 

 

Note​

 

 

 

 

1.​The term CARM can apply to any positioner with 2 degrees​

 

 

 

 

of freedom of rotation of the X-Ray beam about the Imaging​

 

 

 

 

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.​

C-armPositionerTabletop​

(0018,9474)​

1C​

Describes for C-arm positioner type systems if positioner and tabletop has​

Relationship​

 

 

the same geometrical reference system.​

Enumerated Values:​

YES​

NO​

Note​

The value NO is intended for mobile systems where there is no​ table fixed to the system​

Required if Positioner Type (0018,1508) equals CARM.​

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DICOM PS3.3 2020a - Information Object Definitions​

Page 1053​

Attribute Name​

Tag​

Type​

Attribute Description​

 

Acquired Image Area​

(0018,9473)​

2​

X-Ray dose, measured in dGy*cm*cm, to which the patient was exposed​

Dose Product​

 

 

for the acquisition of this image only.​

 

Note​

1.​The sum of the Image Area Dose Product of all images of a​ Series or a Study may not result in the actual area dose​ product to which the patient was exposed.​

2.​Thismaybeanestimatedvaluebasedonassumptionsabout​ the patient's body size and habitus.​

C.8.19.4 X-Ray Image Intensifier Module​

Table C.8.19.4-1 specifies the Attributes of the X-Ray Image Intensifier Module.​

Table C.8.19.4-1. X-Ray Image Intensifier Module Attributes​

Attribute Name​

Tag​

Type​

Attribute Description​

Intensifier Size​

(0018,1162)​

1​ Physical diameter of the maximum active area X-Ray intensifier in mm.​

 

 

 

Note​

 

 

 

This Attribute does not specify the field of view. The Attribute Field of​

 

 

 

View Dimension(s) in Float (0018,9461) is intended for this value.​

Intensifier Active Shape​

(0018,9427)​

1​ Shape of the active area used for acquiring this image.​

 

 

 

Enumerated Values:​

 

 

 

RECTANGLE​

 

 

 

ROUND​

 

 

 

HEXAGONAL​

 

 

 

Note​

 

 

 

This may be different from the Field of View Shape (0018,1147), and​

 

 

 

should not be assumed to describe the stored image.​

Intensifier Active​

(0018,9428)​

1​ Dimensions in mm of the active area used for acquiring this image.​

Dimension(s)​

 

 

If Intensifier Active Shape (0018,9427) is:​

 

 

 

RECTANGLE: row dimension followed by column.​

ROUND: diameter.​

HEXAGONAL: diameter of the circle circumscribing the hexagon.​

Note​

This may be different from the Field of View Dimension(s) in Float​ (0018,9461),andshouldnotbeassumedtodescribethestoredimage.​

C.8.19.5 X-Ray Detector Module​

Table C.8.19.5-1 contains IOD Attributes that describe an X-Ray detector.​

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Page 1054​ DICOM PS3.3 2020a - Information Object Definitions​

Table C.8.19.5-1. X-Ray Detector Module Attributes​

Attribute Name​

Tag​

Type​

Attribute Description​

Include Table C.8-71b “Digital X-Ray Detector Macro Attributes”​

 

Physical Detector Size​

(0018,9429)​

1​

Dimensions of the physical detector measured in mm as a row​

 

 

 

size followed by a column size.​

Position of Isocenter​

(0018,9430)​

1C​

Position of the Isocenter projection on the detector plane​

Projection​

 

 

measured in fractional physical detector elements as a distance​

 

 

 

along the column direction followed by a distance along the row​

 

 

 

direction from the center of the TLHC detector element of a​

 

 

 

rectangle circumscribing the physical detector area.​

Required if Isocenter Reference System Sequence (0018,9462)​ is present.​

C.8.19.6 Enhanced XA/XRF Image Functional Group Macros​

The following sections contain Functional Group Macros specific to the Enhanced XA Image IOD.​

Note​

The Attribute descriptions in the Functional Group Macros are written as if they were applicable to a single frame (i.e., the​ Macro is part of the Per-frame Functional Groups Sequence). If an Attribute is applicable to all frames (i.e., the Macro is part​ of the Shared Functional Groups Sequence) the phrase "this frame" in the Attribute description shall be interpreted to mean​ " for all frames".".​

C.8.19.6.1 X-Ray Frame Characteristics Macro​

Table C.8.19.6-1 specifies the Attributes of the XA/XRF Frame Characteristics Functional Group Macro.​

Table C.8.19.6-1. X-Ray Frame Characteristics Macro Attributes​

Attribute Name​

Tag​

Type​

Attribute Description​

XA/XRF Frame Characteristics​

(0018,9412)​

1​

ASequencethatdescribesgeneralcharacteristicsofthisframe.​

Sequence​

 

 

Only a single Item shall be included in this Sequence.​

 

 

 

>Derivation Description​

(0008,2111)​

3​

A text description of how this frame was derived.​

 

 

 

See Section C.8.7.1.1.5 for further explanation.​

>Derivation Code Sequence​

(0008,9215)​

3​

A coded description of how this frame was derived. See​

 

 

 

Section C.12.4.1.1 for further explanation.​

 

 

 

One or more Items are permitted in this Sequence.​

 

 

 

More than one Item indicates that successive derivation steps​

 

 

 

have been applied.​

>>Include Table 8.8-1 “Code Sequence Macro Attributes”​

DCID 7203 “Image Derivation”.​

>Acquisition Device Processing​

(0018,1400)​

3​

Indicates any visual processing performed on the frame prior to​

Description​

 

 

exchange.​

See Section C.8.7.1.1.3.​

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DICOM PS3.3 2020a - Information Object Definitions​

Page 1055​

Attribute Name​

Tag​

 

Type​

Attribute Description​

 

>Acquisition Device Processing​ (0018,1401)​

3​

Code representing the device-specific processing associated​

Code​

 

 

 

with the frame (e.g., Organ Filtering code)​

 

 

 

 

 

Note​

 

 

 

 

 

This Codeismanufacturer specific butprovides useful​

 

 

 

 

annotationinformationtotheknowledgeableobserver.​

C.8.19.6.2 X-Ray Field of View Macro​

 

 

 

Table C.8.19.6-2 specifies the Attributes of the X-Ray Field of View Functional Group Macro.​

 

 

Table C.8.19.6-2. X-Ray Field of View Macro Attributes​

 

Attribute Name​

Tag​

Type​

 

Attribute Description​

 

Field of View Sequence​

(0018,9432)​

1​

Sequence containing the field of view for this frame.​

 

 

 

 

Only a single Item shall be included in this Sequence.​

 

>Field of View Shape​

(0018,1147)​

3​

Shape of the Field of View, that is the image pixels stored in Pixel Data​

 

 

 

(7FE0,0010).​

 

 

 

 

Enumerated Values:​

 

 

 

 

RECTANGLE​

 

 

 

 

ROUND​

 

 

 

 

 

HEXAGONAL​

 

>Field of View​

(0018,9461)​

3​

Dimensions in mm of the Field of View, that is the image pixels stored in​

Dimension(s) in Float​

 

 

Pixel Data (7FE0,0010). If Field of View Shape (0018,1147) is:​

 

 

 

RECTANGLE: row dimension followed by column.​

 

 

 

 

ROUND: diameter.​

 

 

 

 

HEXAGONAL: diameter of the circle circumscribing the hexagon.​

>Field of View Origin​

(0018,7030)​

1C​

Offset of the TLHC of a rectangle circumscribing the Field of View, i.e., the​

 

 

 

image pixels stored in Pixel Data (7FE0,0010) before rotation or flipping,​

 

 

 

from the TLHC of the physical detector area measured in physical detector​

 

 

 

pixels as a row offset followed by a column offset.​

 

 

 

 

See Section C.8.11.4.1.1 for further explanation.​

 

 

 

 

Required if X-Ray Receptor Type (0018,9420) is present and equals​

 

 

 

DIGITAL_DETECTOR. May be present otherwise.​

 

>Field of View Rotation​

(0018,7032)​

1​

Clockwise rotation in degrees of Field of View, i.e., the image pixels stored​

 

 

 

in Pixel Data (7FE0,0010), relative to the physical detector.​

 

Enumerated Values:​

270​

180​

90​

0​

See Section C.8.11.4.1.1 for further explanation.​

- Standard -​

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