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The information contained on the present site is taken with permission from www.radiologyinfo.org, a public information web site jointly sponsored by the Radiological Society of North America (RSNA) and the American College of Radiology (ACR). The content has been adapted to the Canadian context and further modified in accordance to the Canadian Association of Radiologists (CAR) Standards of Practice.

Consequently, only the CAR can be considered authors of the Canadian version and any ambiguity or errors would not in any way involve the RSNA or the ACR.