CAMRT Radiography Practice Exam

What is the main difference between Lauenstein (Frog leg) and cross-table lateral views of the hip?

1. Lauenstein shows the femoral neck free of overlap

2. Lauenstein shows the greater trochanter in profile

3. Lauenstein shows lesser trochanter in profile medially

4. Cross-table shows posterior view of femur

The correct answer is: Lauenstein shows lesser trochanter in profile medially

The main distinction between the Lauenstein (Frog leg) view and the cross-table lateral view of the hip centers around how the anatomical structures are represented, particularly the position and visibility of the lesser trochanter. In the Lauenstein view, the patient is positioned with the hip in a flexed position, allowing the femur to be abducted and externally rotated. This positioning results in the lesser trochanter being well demonstrated in profile on the medial side of the femur. This characteristic is essential for evaluating hip fractures or degenerative changes, as it offers a clear view of this anatomical landmark. The cross-table lateral view, on the other hand, is designed to visualize the hip joint without the need for the patient to be in a supine or prone position. While it provides essential information about the hip joint and allows for assessment of fractures or dislocations, it does not highlight the lesser trochanter in the same way as the Lauenstein view. By focusing on this aspect, the choice that states the Lauenstein view shows the lesser trochanter in profile medially accurately captures the significant anatomical difference found in these two imaging techniques.