Manual image calibration provides the most accurate measurements and should be performed prior to any digital planning. The calibration sphere should be placed at the same vertical height as the object to be measured. If this cannot be achieved, the magnification error can be expected to be approximately 1% per centimeter of distance between the sphere and object of interest.Digital TPLO planning can help improve the accuracy of the osteotomy, avoid fibular penetration and hence improved surgical outcome can be expected.Image stitching can be useful for measurement of TPA in large breed dogs or any dog where a stifle centered image provides easier identification of landmarks used for TPA-measurement (such as animals with ALD etc.)
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