The app helps to monitor radiographic parameters of spinopelvic motion in standing and sitting X-rays and evaluate optimally the interrelated motion of spine and hip.

Evaluation of lateral radiographs in sitting and standing positions is of importance, especially in patient before total hip replacement surgery.The importance of understanding the hip spine relationship and the spinopelvic mobility has become increasingly recognised in recent years as a cause of hip instability with no previous known aetiology. Spinopelvic motion is a coordinated biomechanical relationship among acetabular anteversion, pelvic tilt, and lumbar lordosis. Hip instability due to spinopelvic mobility, specifically the move from standing to sitting, and the subsequent changes in pelvic orientation is associated with late dislocations in hip replacement surgery and revision. Awareness of this phenomenon by hip and spine surgeons and pre and post operative evaluation of the hips help guide the surgeon to the ideal location for cup implantation or to address the spine or hip pathology accordingly.
Radiographic measurement in lateral radiographs in sitting and standing positions of Pelvic incidence (PI), Sacral Tilt (ST), Ante-Inclination (AI), Sacro-acetabular angle (SAA) and Pelvic femoral Angle Angle (PFA) are of paramount importance. These data measured in standing and in sitting X-rays and compared both with normal reference data may help to evaluate and plan treatment strategies. In clinical settings measuring all these angles is cumbersome and App comes to help the surgeon to do the job without loosing time.
The Spinopelvic Mobility App is medical software aimed for orthopaedic surgeons, providing tools that allow doctors to:
-Securely import medical images directly from the camera or stored photos.
-By marking few points at the image of X-ray, the App calculates and offers a very convenient way to determine the most accurate possibly way at once, Pelvic incidence (PI), Sacral Tilt (ST), Ante-Inclination (AI), Sacro-acetabular angle (SAA) and Pelvic femoral Angle Angle (PFA). According to measured parameters in standing and sitting lateral x- rays the app helps to identify patterns of spinopelvic mobility namely normal, hypermobile or three patterns of spinal imbalance: hips maintained in anterior tilt (stuck standing), hips held in posterior tilt (stuck sitting), or stiff hips or kyphotic sacrum.
-Save the planned images, for later review or consultation.The measured values are compared by normal reference databases and also data are exported as txt file, ready to print or to input as cells to excel for research.
-The app allows choosing points in an in independent manner from order and thus it is easy to be learned .
All information received from the software output must be clinically reviewed regarding its plausibility before patient treatment! Spinopelvic Mobility App 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 everyday practice, the examiner have to draw lines in X-rays or in clinical settings, this it is time consuming and cumbersome. Accessory instruments like protractors, hinged goniometers, well sharped pencils, rulers or even transparent papers must be available. The app offers a very convenient and accurate way to perform most common radiographic measurements for spine, at the spinopelvic juncture in a blink of an eye in front of your screen. The build in feature of the app, allows results to be categorized may help decide what could be considered normal or pathologic.
This App is particular useful in clinical settings where you need a quick results without losing time. Please see tutorial videos at the developer’s web site
1.Lum ZC ,et alThe Current Knowledge on Spinopelvic Mobility.J Arthroplasty. 2018 Jan;33(1):291-296.
2.Stefl M et all Spinopelvic mobility and acetabular component position for total hip arthroplasty. Bone Joint J. 2017 Jan;99-B(1 Supple A):37-45.

What’s New

Version 3.0

corrected few bugs and updated help

App Privacy

The developer, Nikolaos Papadimitriou, has not provided details about its privacy practices and handling of data to Apple. For more information, see the developer’s privacy policy.

No Details Provided

The developer will be required to provide privacy details when they submit their next app update.


  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

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