Emerging Ideas: Novel 3-D Quantification and Classification of Cam Lesions in Patients With Femoroacetabular Impingement
| Autor: | Richard W, Kang, Adam B, Yanke, Alejandro A, Espinoza Orias, Alejandro Espinoza, Orias, Nozomu, Inoue, Shane J, Nho |
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| Rok vydání: | 2013 |
| Předmět: |
musculoskeletal diseases
medicine.medical_specialty Radiography Alpha angle Femoracetabular Impingement Imaging Three-Dimensional Emerging Ideas medicine Humans Orthopedics and Sports Medicine In patient Exact location Editor's Spotlight/Take 5 Femoroacetabular impingement business.industry food and beverages Acetabulum Femur Head General Medicine medicine.disease Tomography x ray computed Radiographic Image Interpretation Computer-Assisted Hip Joint Surgery Radiology Tomography X-Ray Computed business |
| Zdroj: | Clinical Orthopaedics & Related Research. 471:358-362 |
| ISSN: | 0009-921X |
| Popis: | Femoroacetabular impingement (FAI) can lead to labral injury, osseous changes, and even osteoarthritis. The literature contains inconsistent definitions of the alpha angle and other nonthree-dimensional (3-D) radiographic measures. We present a novel approach to quantifying cam lesions in 3-D terms. Our method also can be used to develop a classification system that describes the exact location and size of cam lesions.We asked whether automated quantification of CAM lesions based on CT data is a reasonable way to detect CAM lesions and whether they may be classified based on location.We developed a method to quantify femoral head cam lesions using 3-D modeling of CT scans. By segmenting raw DICOM data, we can determine the distance from the cam lesion's surface points to the centroid of the femoral head to quantify the mean bump height, volume, and location. The resulting 3-D femoral and acetabular models will be analyzed with custom software. We then will quantify the cam lesion with 3-D parameters using a modified zoning method. The mean bump height, volume, and location on the clock face, and relative zoning will be calculated. Zonal differences will be statistically analyzed. To assess the ability of this method to predict arthroscopic findings, we will obtain preoperative CT scans for 25 patients who undergo hip arthroscopy for FAI. We will compare measurements with the method with our measurements from arthroscopy. The clinical implications of our method's measurements then will be reviewed and refined for future prospective studies.We present a novel approach that can quantify a cam lesion's location and size. This method will be used to provide guidelines for the exact amount of bony resection needed from a specific location of the proximal femur. There is also potential to develop software for ease of use so this method can be more widely applied. |
| Databáze: | OpenAIRE |
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