IEC TR 62266:2002 pdf download

IEC TR 62266:2002 pdf download.Medical electrical equipment -Guidelines for implementation ofDICOM in radiotherapy.
There are also a number of public domain Toolkits available on the Internet which are not normally used to develop a DICOM interface to an application system to be developed as a commercial product. Notwithstanding that, these toolkits provide an easy to understand and implement DICOM interface. These toolkits also provide a very convenient initial test environment.
As It is obvious from (1)— (3), that there are a number of options available in implementing a DICOM interface to an application system. A DCS contains the Objects and the associated Service Classes implemented by an application system. A good DCS must also include the Object modules and their attributes implemented. The next step is to consult the DCS, usually published on the Internet. of a system you are intending to interconnect with. From the comparisons of two DCSs, it should be possible to deduce the level of interconnectivity of the two systems.
For a complicated DICOM RT Object (eg RT Plan), different implementers are likely to implement different module/attribute options, Before an implementation is started, it is suggested to consult major providers of already existing DICOM interfaces about the commonly accepted implementations and the way the attributes are used officially. In any case where an implementer is uncertain about how the attributes are used, the DICOM WG7 committee for RT Objects should be contacted for advice on correct usage.
It is also important for two or more implementers intending to inter-communicate to decide upon the common set of module/attribute options and check the consistency of the attribute usage of each module against the DICOM standard. In case of uncertainty, the DICOM WG7 should be contacted to avoid possible implementations that contradict the officially established usage. Some implementations may become invalidated in the course of other implementations which correctly use the standard definition.
10 DICOM Testing
The DICOM standard does not specify a test suite or a compliance verification mechanism. There are working groupsfcenters developing compliance verification tools, but It is still the users responsibility to define initial cross-platform test plans to demonstrate compliance between the new and existing pieces of equipment.
To verify a DICOM interface, the following steps are usually conducted:
• Test the conformance of the application system against the DCS produced. This is an in- house test to check that the system meets the DCS.
• There are a number of public domain DICOM test environments available on the Internet which can provide initial test facilities.
• To test it more rigorously there are also commercially available DICOM test centers. So far these are only available for the non-RT environment.
• Arrange one or more cross vendor testing with third party equipment. This should determine the level of inter-connectivity between various equipment.
11 Caution to Users
The DICOM standard follows the IEC convention in all cases except for the patient coordinate system which is the only known inconsistency between the DICOM standard and the IEC. The IEC. through its publication IEC 61217, Amendment 1 (1999) defines patient coordinate systems for radiotherapy equipment. As the DICOM defines the patient co-ordinate system that is related to the portrayal of cross-sectional images, an amendment to IEC 61217 includes transformation matrices to allow conversion of patient coordinates from the DICOM convention to the IEC convention.
The health care facility is responsible for confirming the veracity of data transferred using theDICOM standard. This requires specification of the needed capabilities,evaluations of theaccuracy data transfer，and testing of the implementation of these data by the receivingstation.
Although DICOM compliance is a necessary condition for radiation oncology information to betransferred among pieces of radiation oncology equipment, it is not necessarily a sufficientcondition. DIcOM provides a common interface language,and DICOM compliance ensuresthat all equipment “speaks the same language”. However，DICOM compliance does notensure that the information passed from one piece of equipment to another will be compatiblewith the capabilities of the receiving equipment,such that the two systems can inter-operate.The situation is analogous to communication among people: A communication language(say,English or French) might be defined, but one also needs a mechanism，such as a telephoneor email connection, to actually effect the transfer of information from one individual toanother. Thus，purchasers of radiation oncology equipment must verify that their equipmentwill actually communicate with other equipment and successfully transfer information usingthe DICOM protocols and definitions.