| DICOM PS3.17 2026d - Explanatory Information |
|---|
Traditional RDSR requires a single pulse rate value in fluoroscopy Irradiation Events if the fluoro mode is provided and equals "Pulsed". Pulse rate is not supported for acquisition Irradiation Events.
Enhanced RDSR supports pulse rate for both types of Irradiation Events. Multiple values of pulse rate can be provided for a given Irradiation Event when the pulse rate changes during an Irradiation Event.
In the Traditional RDSR, the pulse rate and number of pulses are encoded in TID 10003 “Irradiation Event X-Ray Data” and in TID 10003B “Irradiation Event X-Ray Source Data”. The encoding requirements depend on the type of Irradiation Event (i.e., Fluoroscopy or Acquisition) as well as the fluoro mode (i.e., pulsed or continuous).
Table UUUU.4.8.1-1 shows an example pulsed Fluoroscopy Irradiation Event of 4 seconds at 7.5 pulses per second. In this case the pulse rate and the number of pulses are required.
Since it is not possible to encode several pulse rates in one Fluoroscopy Irradiation Event in the Traditional RDSR, it is recommended to encode an average pulse rate when the pulse rate is variable.
Table UUUU.4.8.1-2 shows an example continuous Fluoroscopy Irradiation Event. In this case the pulse rate and the number of pulses are not relevant.
Table UUUU.4.8.1-3 shows an example stationary Acquisition Irradiation Event of 5 seconds at 30 pulses per second. In this case the number of pulses is required, and fluoro mode and pulse rate are not permitted.
The pulse rate value is not encoded when the Irradiation Event Type is Acquisition. In such case, the average pulse rate can be calculated from the number of pulses (113768, DCM, "Number of Pulses") and the acquisition duration (113742, DCM, "Irradiation Duration").
| DICOM PS3.17 2026d - Explanatory Information |
|---|