DICOM PS3.3 2019a - Information Object Definitions
C. Breast Biopsy Target Macro

Table C. specifies the Attributes of the Breast Biopsy Target Functional Group Macro.

Table C. Breast Biopsy Target Macro Attributes

Attribute Name



Attribute Description

Biopsy Target Sequence



Sequence that identifies the targets of a biopsy procedure. One or more Items are permitted in this Sequence for this frame, where the coordinate system is the same for all Items within a pair of stereo images.

Required if one or more biopsy targets are present for this frame.

>Target UID



Unique identifier for the target.


To identify the same target in corresponding stereo images.

>Localizing Cursor Position



Coordinates of localizing cursor position with respect to pixels in the image specified by a column (delimiter) row pair. The values shall be in the range 0\0 (TLHC) to Columns\Rows (BRHC).

>Calculated Target Position



The calculated target position (x, y, z) in mm in an equipment relative right-handed coordinate system where the origin is under the central X-Ray beam at the chest wall, and a z value of zero is located at the surface that the breast is in contact with that is closest to the detector.

X is parallel to the chest wall, y is positive toward the patient's nipple, and z is positive toward the X-Ray source.

>Displayed Z Value



The z value in mm displayed to the user at the time of biopsy.


  1. This may be the same as the z value of Calculated Target Position or different in direction or reference point, such as relative to the compression paddle.

  2. This is not the distance that the needle was inserted, particularly for a lateral (parallel) approach.

>Target Label



Target description.

DICOM PS3.3 2019a - Information Object Definitions