What is the caudal collimation border for the VD projection of the abdomen?

In the VD projection (Ventral-Dorsal projection) of the abdomen, the caudal collimation border is typically at the level of the coxofemoral joints. This positioning is essential because it ensures that the entire abdominal cavity is included in the radiographic image while excluding unnecessary pelvic structures from the field of view. Proper collimation helps in achieving a clearer image and reduces exposure to surrounding tissues, thereby optimizing radiographic quality and patient safety.

The coxofemoral joints represent the point at which the femur meets the pelvis, making it an anatomical landmark that indicates the limit of the area to be imaged in the abdomen. By aligning the collimation at this level, radiologists can focus on the critical abdominal organs, such as the liver, spleen, stomach, and kidneys, while also providing a view of the pelvic area without overexposing the patient to radiation.

Understanding the placement of collimation borders, including where to appropriately position them for various projections, is fundamental for effective diagnostic imaging in veterinary radiology.