DICOM PS3.3 2018c - Information Object Definitions

C.8.31 Breast Projection Image Modules

C.8.31.1 Enhanced Mammography Image Module

Table C.8.31-1 specifies the Attributes that identify and describe general information about the Enhanced Mammography Image Module.

Table C.8.31-1. Enhanced Mammography Image Module Attributes

Attribute Name

Tag

Type

Attribute Description

Positioner Motion

(0018,1500)

1

Describes the activity of the X-Ray Source during acquisition.

See C.8.31.1.1 for Defined Terms.

Positioner Type

(0018,1508)

1

Enumerated Values:

MAMMOGRAPHIC

Content Qualification

(0018,9004)

1

Enumerated Values:

PRODUCT

RESEARCH

SERVICE

See C.8.13.2.1.1 for further explanation.

Acquisition DateTime

(0008,002A)

1

The date and time that the acquisition of data that resulted in this image started.

Note

The synchronization of this time with an external clock is specified in the Synchronization Module in Acquisition Time Synchronized (0018,1800).

Acquisition Duration

(0018,9073)

1

The time in seconds needed for the compete acquisition.

See C.7.6.16.2.2.1 for further explanation.

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

KVP

(0018,0060)

1

Average of the peak kilo voltage outputs of the X-Ray generator used for all frames.

X-Ray Tube Current in mA

(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

Total (cumulative) duration of X-Ray exposure for all acquired frames in milliseconds.

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

Exposure in mAs

(0018,9332)

1C

The total (cumulative) exposure for all acquired frames expressed in mAs, for example calculated from Exposure Time and X-Ray Tube Current.

Required if either Exposure Time in ms (0018,9328) or X-Ray Tube Current in mA (0018,9330) is not present. May be present otherwise.

Focal Spot(s)

(0018,1190)

1

Nominal focal spot size in mm used to acquire all frames.

Anode Target Material

(0018,1191)

1

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

Defined Terms:

TUNGSTEN

MOLYBDENUM

RHODIUM

Body Part Thickness

(0018,11A0)

1

The average thickness in mm of the body part examined when compressed, if compression has been applied during exposure.

Compression Force

(0018,11A2)

1

The compression force applied to the body part during exposure, measured in Newtons.

Compression Pressure

(0018,11A3)

3

The average compression pressure applied to the body part during exposure, calculated in kPa.

Compression Contact Area

(0018,11A5)

3

The area of the body part to which compression has been applied during exposure, measured in mm2.

Note

Area information is useful in addition to the Compression Pressure (0018,11A3) and Compression Force (0018,11A2) in the event that unusual values are encountered.

Paddle Description

(0018,11A4)

1

Description of the compression paddle, if compression was applied to the body part during exposure.

Exposure Control Mode

(0018,7060)

1

Type of exposure control

Defined Terms:

AUTOMATIC

MANUAL

Exposure Control Mode Description

(0018,7062)

1

Text description of the mechanism of exposure control.

May describe the number and type of exposure sensors or position of the sensitive area of the imaging detector.

Patient Orientation

(0020,0020)

1C

Patient direction of the rows and columns of the most representative frame.

Required if View Code Sequence (0054,0220) has an Item value other than one representing a specimen image. May be present otherwise.

Image Comments

(0020,4000)

3

User-defined comments about the image.

Samples per Pixel

(0028,0002)

1

Number of samples (planes) in this image.

Enumerated Values:

1

Photometric Interpretation

(0028,0004)

1

Specifies the intended interpretation of the pixel data.

Enumerated Values:

MONOCHROME1

MONOCHROME2

Bits Allocated

(0028,0100)

1

Number of bits allocated for each pixel sample. Each sample shall have the same number of bits allocated.

Enumerated Values:

8

16

Bits Stored

(0028,0101)

1

Number of bits stored for each pixel sample. Each sample shall have the same number of bits stored.

Enumerated Values:

8

9

10

11

12

13

14

15

16

High Bit

(0028,0102)

1

Most significant bit for pixel sample data. Each sample shall have the same high bit.

Shall have an Enumerated Value of one less than the value of Bits Stored (0028,0101).

Pixel Representation

(0028,0103)

1

Data representation of the pixel samples. Each sample shall have the same pixel representation.

Enumerated Values:

0000H

unsigned integer

Quality Control Image

(0028,0300)

3

Indicates whether or not this image is a quality control of phantom image.

Enumerated Values:

YES

NO

Burned in Annotation

(0028,0301)

1

Indicates whether or not the image contains sufficient burned in annotation to identify the patient and date the image was acquired.

Enumerated Values:

NO

Lossy Image Compression

(0028,2110)

1

Specifies whether an Image has undergone lossy compression (at a point in its lifetime).

Enumerated Values:

00

Image has NOT been subjected to lossy compression.

01

Image has been subjected to lossy compression.

Once this value has been set to 01 it shall not be reset.

See Section C.7.6.1.1.5.

Lossy Image Compression Ratio

(0028,2112)

1C

Describes the approximate lossy compression ratio(s) that have been applied to this image.

See Section C.7.6.1.1.5.2.

Required if Lossy Image Compression (0028,2110) is "01".

Lossy Image Compression Method

(0028,2114)

1C

A label for the lossy compression method(s) that have been applied to this image.

See Section C.7.6.1.1.5.1.

Required if Lossy Image Compression (0028,2110) is "01".

Organ Dose

(0040,0316)

1

Organ dose value measured in dGy representing the collective total for all acquired frames.

Note

This may be an estimated value.

Entrance Dose in mGy

(0040,8302)

1

Entrance dose value measured in mGy at the surface of the patient representing the collective total for all acquired frames.

Note

This may be an estimated value based on assumptions about the patient's body size and habitus.

Entrance Dose Derivation

(0040,8303)

3

Describes what type of dose is represented by the values of Entrance Dose in mGy (0040,8302).

Enumerated Values:

IAK

Represents air kerma at the entrance surface, no backscatter included, no air kerma to tissue dose conversion applied.

ESAK

Represents air kerma at the entrance surface, with backscatter included, no air kerma to tissue dose conversion applied.

ESDBS

Represents absorbed dose in tissue at the entrance surface, with backscatter included.

ESDNOBS

Represents absorbed dose in tissue at the entrance surface, without backscatter included.

Type of Detector Motion

(0054,0202)

1

Describes the activity of the Detector during acquisition.

See C.8.31.1.1 for Defined Terms.

Icon Image Sequence

(0088,0200)

3

This icon image is representative of the Image. Only a single Item is permitted in this Sequence.

>Include Table C.7-11b “Image Pixel Macro Attributes”

See C.7.6.1.1.6 for further explanation.

Presentation LUT Shape

(2050,0020)

1

Specifies a transformation for the Presentation LUT such that the output of all grayscale transformations, if any, is defined to be in P-Values.

Enumerated Values:

IDENTITY

output is in P-Values; shall be used if Photometric Interpretation (0028,0004) is MONOCHROME2.

INVERSE

output after inversion is in P-Values; shall be used if Photometric Interpretation (0028,0004) is MONOCHROME1.


C.8.31.1.1 Positioner and Detector Motion Attribute Descriptions

Positioner Motion (0018,1500) and Type of Detector Motion (0054,0202) shall have the Defined Terms specified in Table C.8.31.1.1-1.

Table C.8.31.1.1-1. Types of Positioner and Detector Motion

STATIONARY

No motion

ROTATION_STEP

Circular arc motion, stepped, acquire only while stationary

ROTATION_CONT

Circular arc motion, continuous during acquisition

TRANSLATION_STEP

Linear motion, stepped, acquire only while stationary

TRANSLATION_CONT

Linear motion, continuous during acquisition

COMPLEX_STEP

Complex motion, stepped, acquire only while stationary

COMPLEX_CONT

Complex motion, continuous during acquisition


Complex motion is defined as that which is not simply described by linear translation or rotation around an axis.

DICOM PS3.3 2018c - Information Object Definitions