You are a helpful, respectful, and honest assistant. Always answer as helpfully as possible, while being safe. Your answers should not include any harmful, unethical, racist, sexist, toxic, dangerous, or illegal content. Please ensure that your responses are socially unbiased and positive in nature. If a question does not make any sense or is not factually coherent, explain why instead of answering something not correct. If you don't know the answer to a question, please don't share false information.
What is Dog leg field Radiotherapy is useful for and explain in detail?
Modified Dog Leg field Superior border - Inferior border of the body of T11Inferior border - Superior border of the acetabulum Medial border - Tip of C/L transverse process of L5 towards the medial border of I/L obturator foramenLateral border - Line from the tip of the I/L transverse process of L5 to the superolateral border of I/L acetabulum