4/11/2024 0 Comments Hip dysplacia xray shoing normal![]() ![]() It measures how well the acetabulum (“hip socket”) covers the head of the femur (“ball” of the hip joint). This is the most commonly measured angle to determine if a person has hip dysplasia. These provide images of dense structures such as bone, and will help your doctor assess the alignment of the acetabulum and femoral head. A value greater than 10 mm denotes that the hip centre has been lateralised. This assessment is based on the position of the medial aspect of the femoral head in relation to the ilioischial line. ![]() The hip socket is shallow and there is only partial coverage of the femoral head. This can be assessed on an AP radiograph of the pelvis and can be classified as lateralised or not lateralised. Instead, he or she will combine information from the patient’s history, physical examination, and imaging to determine the best plan of care. (Right) This x-ray shows a dysplastic hip. A good hip dysplasia expert will not make a treatment plan based solely on measurements. It is important to keep in mind that measurements are not always black and white, and may vary slightly between different providers (“inter-rater reliability”) and sometimes even within the same provider on multiple occasions (“intra-rater reliability”). These are some of the most common measurements associated with evaluation of hip dysplasia. Next, lines are drawn perpendicular to Hilgenreiner line through superolateral edge of acetabulum (Perkin line), dividing hip into 4 quadrants. From anteroposterior radiograph of hips, horizontal line (Hilgenreiner line) is drawn between each triradiate cartilage. Hip dysplasia experts may order a variety of special imaging and tests to help determine the best treatment for a patient. Typical radiographic evaluation of developmental dysplasia of hip (DDH). ![]()
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