What is the imaging modality of choice in congenital hip dislocation?

The imaging modality of choice for congenital hip dislocation, also known as developmental dysplasia of the hip (DDH), is ultrasound. This preference arises primarily due to the age of the patient, as newborns and infants have soft tissues and cartilaginous structures that are not well visualized through X-ray. Ultrasound is advantageous because it can provide clear images of these structures, allowing for accurate assessment of hip joint stability and development.

Furthermore, ultrasound is a radiation-free modality, which is particularly important in pediatric cases to avoid exposing young patients to unnecessary radiation. It can effectively evaluate the position of the femoral head, the acetabulum, and the surrounding soft tissues. This helps in the timely identification of hip dislocations or dysplasia, enabling early intervention which is crucial for better long-term outcomes.

While other imaging techniques like X-ray and MR imaging have their uses in different contexts, they are less efficient or practical for assessing congenital hip dislocation in infants compared to ultrasound. X-rays are often used for older children or to assess the bony structures after the initial screening process, while MR imaging might be reserved for cases where further detail is necessary or other complications are suspected. However, for primary evaluation in the neonatal and infant population,