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Osteoarthritis Cartilage. 2007 Nov;15(11):1221-4. Epub 2007 Oct 31.

Optimization of the fixed-flexion knee radiograph.

Abstract

PURPOSE:

To develop a user-friendly method of achieving optimal radiographs for measurement of joint space width of the knee with minimal radiation exposure. In order to accomplish this the X-ray technologist must (1) be able to identify the anterior and posterior rims of the tibial plateau at a variety of X-ray head angles and (2) be able to choose the direction to adjust the head angle to get a better view based on the criteria for acceptable radiographs.

METHODS:

We have developed a training manual and materials to instruct investigators and radiology technologists in a method that uses a commercially available Plexiglas positioning frame (Synaflexer) and standard X-ray equipment to achieve optimal X-rays with regard to tibial plateau alignment of the knee. This should be accomplished with four or fewer radiographs.

RESULTS:

Optimized radiographs for joint space width measurements are achieved without the need for fluoroscopy or foot maps.

CONCLUSIONS:

This method is readily understood and instituted by radiology technologists in the field.

PMID:
17977754
DOI:
10.1016/j.joca.2007.05.012
[Indexed for MEDLINE]
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