(NOTE: In January of 2025 an article will be published in the Journal of Contemporary Chiropractic. This article shows that real life axial (y-axis) rotation of the pelvis could create projected femur head height changes on the anteroposterior radiograph. While this app calculates projected axial rotation of the pelvis, this projected rotation on the anteroposterior radiograph is a combination of both real life axial rotation and projected axial rotation due to x axis translation. This is different than axial rotation on the radiograph that is created by real life pelvic axial rotation alone. Therefore this app cannot be used to aid in the consideration of femur head height changes without taking into consideration projected axial rotation created by x axis translation in a given case. This is a somewhat complex consideration and we are currently working on an article to explain this. This app is currently undergoing further study related to accuracy and usage but the results have not yet been published.)
We have developed the Pelvic Rotation Calculator App which is a program to calculate true measurements and rotation amounts using measurements taken from the radiograph and the x-ray positioning environment. It was developed as a non profit contribution by the Gonstead Clinical Studies Society Research Department. It is based on our article published in the Journal of Chiropractic Medicine which proposed a mathematical method to quantify Y-Axis pelvic rotation on the anteroposterior radiograph.
Click on the README document link and follow the directions to access the free Pelvic Rotation Calculator App
https://github.com/dereklopes/PelvicRotationCalculator#readme
Read the whole article here:
A Proposed Mathematical Method to Quantify y-Axis Pelvic Rotation on the Anteroposterior Radiograph