Our algorithm calculates two metrics which serve as feedback on the quality of positioning:
1. The leg angle is computed. Most practitioners advise an angle of around 90 degrees for the TPLO analysis.
2. The superimposition of the condyles of the femur is computed as a score from 50-100%. 100% means perfect alignment. If this number drops below 80% you may wish to re-take the radiograph for better positioning.

Our algorithm is intended for pre-surgical images of the stifle. When the algorithm runs on an image which includes post-operative metal (either TTA, TPLO, or other) the presence of that metal in the image may degrade performance of the algorithm, because we did not train on images that contained post-operative metal.

Note that the intended view is a medial-to-lateral radiograph of the limb that is against the table.

Ideally, the Talus Joint is visible in the image. But when it is not in the image, our algorithm does its best to guess at the proper direction for the tibia line.