CupAnteversionInclinationApp

In Total hip Arthroplasty the orientation, namely anteversion and inclination of the new acetabular component -cup- influences wear, range of movement (ROM), and the likelihood of dislocation after total hip replacement (THR). Evaluating objectively of the cup anteversion, and inclination in hip arthroplasty replacement surgery is of paramount importance. Radiographs are the most important diagnostic means in the follow-up for evaluation of a total hip arthroplasty. Measuring anteversion and inclination in everyday clinical setting is a cumbersome work for a medical doctor. Computation requires a calculator, which requires an additional effort during practice and slows down workflow.

The App is medical software aimed for orthopaedic surgeons, providing a tool that allow doctors to:

-Securely import medical images directly from the camera or stored photos.

-By marking certain anatomical landmark and points in a simple standard AP pelvic radiograph, values for cup inclination and anteversion are being calculated. The app is based on Widmer’s method which is the proven that is the most accurate compared to others.

-Pelvic tilt expressed by the angle APP is incorporated in measurements and can be adjusted manually according to surgeons preference.

-Radiographic Inclination (RI) and Radiographic Anteversion (RA) values are adjusted by taking into account pelvic tilt (APP angle).

- RI or RA values are printed in red or green, according to measured value in cases these are in certain range (Lewinnek at al), indicating if the positioning of the cup is optimal (green) or not (red).

-Operative Inclination (OI), Operative Anteversion (OA), Anatomical Inclination (AI), Anatomical Anteversion (AA) are also calculated.

-The data are printed over to screen so each case can easily assessed

-Save the planned images, for later review or consultation.

The app offers an easy way to quantify cup anteversion and inclination a quick and comfortable manner without the use of a goniometer or a ruler or to calculate elaborated formulas.The app lets the user load or scan an image, place anatomical landmarks with a circular target overlay, adjust APP pelvic tilt from -89 degrees to +89 degrees, calculate radiographic inclination (RI) and radiographic anteversion (RA), display green/red range coloring, and save the annotated result image locally.

Features:

Load image from Android image picker.

Capture image from camera.

Zoom and pan image canvas.

Circular target overlay for landmark placement.

T1/T2 inter-teardrop line workflow.

Cup ellipse geometry workflow for RI and RA.

APP pelvic tilt correction.

Second-side measurement without repeating T1/T2.

Save annotated images to Photos/Pictures.

In-app help, privacy, terms, support, and launch consent.

Professional-use notice: This app is a planning-support, education, research, and workflow-validation tool. It does not provide medical advice, does not diagnose or treat, does not make autonomous clinical decisions, and does not replace clinical judgment, formal training, or institutional protocols. All outputs must be independently reviewed before professional use.

All information received from the software output must be clinically reviewed regarding its plausibility before patient treatment! The App is indicated for assisting healthcare professionals. Clinical judgment and experience are required to properly use the software.The software is not for primary image interpretation.

In a busy THA practice, the examiner to draw lines in X-rays, it is time consuming and cumbersome to calculate mathematics.This App is particular useful in clinical settings where you need a quick results without losing time.