Description of patellar movement by 3D parameters obtained from dynamic CT acquisition

Marina de Sá Rebelo; Ramon Alfredo Moreno; Riccardo Gomes Gobbi; Gilberto Luis Camanho; Luiz Francisco Rodrigues de Ávila; Marco Kawamura Demange; Jose Ricardo Pecora; Marco Antonio Gutierrez

doi:10.1117/12.2043677

18 March 2014 Description of patellar movement by 3D parameters obtained from dynamic CT acquisition

Marina de Sá Rebelo, Ramon Alfredo Moreno, Riccardo Gomes Gobbi, Gilberto Luis Camanho, Luiz Francisco Rodrigues de Ávila, Marco Kawamura Demange, Jose Ricardo Pecora, Marco Antonio Gutierrez

Author Affiliations +

Proceedings Volume 9035, Medical Imaging 2014: Computer-Aided Diagnosis; 903538 (2014) https://doi.org/10.1117/12.2043677
Event: SPIE Medical Imaging, 2014, San Diego, California, United States

Abstract

The patellofemoral joint is critical in the biomechanics of the knee. The patellofemoral instability is one condition that generates pain, functional impairment and often requires surgery as part of orthopedic treatment. The analysis of the patellofemoral dynamics has been performed by several medical image modalities. The clinical parameters assessed are mainly based on 2D measurements, such as the patellar tilt angle and the lateral shift among others. Besides, the acquisition protocols are mostly performed with the leg laid static at fixed angles. The use of helical multi slice CT scanner can allow the capture and display of the joint´s movement performed actively by the patient. However, the orthopedic applications of this scanner have not yet been standardized or widespread. In this work we present a method to evaluate the biomechanics of the patellofemoral joint during active contraction using multi slice CT images. This approach can greatly improve the analysis of patellar instability by displaying the physiology during muscle contraction. The movement was evaluated by computing its 3D displacements and rotations from different knee angles. The first processing step registered the images in both angles based on the femur´s position. The transformation matrix of the patella from the images was then calculated, which provided the rotations and translations performed by the patella from its position in the first image to its position in the second image. Analysis of these parameters for all frames provided real 3D information about the patellar displacement.

Citation Download Citation

Marina de Sá Rebelo, Ramon Alfredo Moreno, Riccardo Gomes Gobbi, Gilberto Luis Camanho, Luiz Francisco Rodrigues de Ávila, Marco Kawamura Demange, Jose Ricardo Pecora, and Marco Antonio Gutierrez "Description of patellar movement by 3D parameters obtained from dynamic CT acquisition", Proc. SPIE 9035, Medical Imaging 2014: Computer-Aided Diagnosis, 903538 (18 March 2014); https://doi.org/10.1117/12.2043677

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available