UUUU.4.3 Encoding of the Identity of the Equipment

UUUU.4.3 Encoding of the Identity of the Equipment (Current)
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Medical physicists doing quality control, dose/protocol management and dose optimization of X-Ray equipment in an institution need to identify the device that is creating the RDSR. Their analysis may consider the individual device, the model of the device, and/or the manufacturer name, etc. National RDSR Registries will also be interested in such information.

The inclusion of TID 1002 “Observer Context” in the RDSR with Observer Type equal to (121007, DCM, "Device") allows to identify the irradiating device with the information defined in TID 1004 “Device Observer Identifying Attributes”. The UDI (Unique Device Identifier) and the Serial Number are unique for each individual device for a given manufacturer and model.

The information in the Enhanced General Equipment Module of the RDSR also specifies the Manufacturer, Model, Software Version, and Serial Number of the system that produces the data (e.g., the device providing the content of the SOP Instance).

When the system that creates the RDSR SOP Instance is the irradiating device, the values will be consistent between the TID 1002 “Observer Context” and the Enhanced General Equipment Module. However, the system that creates the RDSR SOP Instance might not be the irradiating device or the device that captures the dose related information.

Please note that the TID 1002 is mandatory in the RDSR, but it might contain only a Person observer and not the Device, so device information is not mandatory in the structured content. RDSR creators should use TID 1002 with "Device" observer.

Table UUUU.4.3-1 provides guidance on the DICOM Attributes that allow to uniquely identify the individual devices.

Table UUUU.4.3-1. Guidance for Attributes to uniquely identify the individual devices

Attribute Name / Content Item Concept Name	Implementation Guidance
Device UDI	It's globally unique to each individual device, as defined by a corresponding Issuing Agency. Refer to Section 10.29.1 in PS3.3 . This Attribute is Optional in RDSR.
Device UID	It's globally unique to each individual device. Is mandatory if the Observer Type equals (121007, DCM, "Device").
Serial Number	It's unique to the device instance of a given manufacturer and model. This is the serial number of the whole system; it does not include parts/components of the system. This Attribute is mandatory in the Enhanced General Equipment Module.

Table UUUU.4.3-2 provides guidance on other DICOM Attributes that identify the devices but that might change values for the same device within the same hospital or manufacturer.

Table UUUU.4.3-2. Guidance for other Attributes to identify devices

Attribute Name / Content Item Concept Name	Implementation Guidance
Manufacturer	This is mandatory in the Enhanced General Equipment Module. Be aware that for a given manufacturer, this value might change over time for the same device upon software upgrades.
Model Name	This is mandatory in the Enhanced General Equipment Module. This should be a name that represents a type of equipment known by the end user, typically the commercial name.
Device Name	Optional. In TID 1004 it defaults to the Station Name of the General Equipment Module.
Station Name	Optional. User defined name, ideally unique in the local network.
Station AE Title	Optional. This is the AE Title of the equipment generating the RDSR.
Software version	Mandatory in the Enhanced General Equipment Module. Typically, this is the version of the software creating the DICOM RDSR instances. The Attribute might contain additional Values to describe specific system components.

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