Roentgen Stereophotogrammteric Analysis
Picture of Roentgen Stereophotogrammetric Analysis (RSA)
(https://www.researchgate.net/figure/Radiostereometric-analysis-RSA-images-with-computer-aided-design-CAD-model-during_fig1_353956389)
How it works ?
With two D X-ray images , determines 3 D co-ordinates of an object within the calibration cage from two 2 D X-ray image.
uses
measures migration over time of joint replacements or the implant stabilized in one point.
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