C.8.31.5 Breast X-Ray Acquisition Dose Macro
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#### C.8.31.5 Breast X-Ray Acquisition Dose Macro

Table C.8.31.5-1 specifies the Attributes of the X-Ray Acquisition Dose Functional Group Macro.

Table C.8.31.5-1. Breast X-Ray Acquisition Dose Macro Attributes

Attribute Name | Tag | Type | Attribute Description
--- | --- | --- | ---
X-Ray Acquisition Dose Sequence | (0018,9542) | 1 | Sequence containing the X-Ray exposure information for this frame. Only a single Item shall be included in this sequence.
>Exposure Time in ms | (0018,9328) | 1 | Duration of X-Ray exposure in milliseconds.
>Exposure in mAs | (0018,9332) | 1 | The exposure expressed in mAs, for example calculated from Exposure Time and X-Ray Tube Current.
>Relative X-Ray Exposure | (0018,1405) | 3 | Indication of the applied dose, in manufacturer specific units. ### Note This value is intended to provide a single location where manufacturer specific information can be found for annotation on a display or film, that has meaning to a knowledgeable observer. This may be a calculated or measured value. Examples are the detector entrance dose (KB) , the CR sensitivity value (S), or the logarithmic median (lgM). DICOM specifies standard Attributes in Table 10-23 “Exposure Index Macro Attributes”, which are recommended.
>Half Value Layer | (0040,0314) | 3 | The thickness of Aluminum in mm required to reduce the X-Ray Output (0040,0312) by a factor of two. ### Note This value may be a calibrated value rather than measured during the exposure.
>Organ Dose | (0040,0316) | 1 | Average organ dose value measured in dGy during the acquisition of this image. ### Note This may be an estimated value.
>Entrance Dose in mGy | (0040,8302) | 1 | Average entrance dose value measured in mGy at the surface of the patient during the acquisition of this image. ### Note This may be an estimated value based on assumptions about the patient's body size and habitus.

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C.8.31.4 Breast X-Ray Geometry Macro | Home | C.8.31.6 Breast X-Ray Isocenter Reference System Macro