Which field uses sophisticated computer applications to determine treatment angles and depth?

• A. Radiology
• B. Radiation Oncology
• C. Medical Physics
• D. Nuclear Medicine

Answer: (B)

The main idea is that delivering external beam radiotherapy relies on computer-based treatment planning to shape and direct the dose. Specialists use advanced planning systems that take imaging data, outline the tumor and nearby healthy tissues, and then compute how the radiation beams should be arranged. This involves choosing beam angles, depths, energies, and how the beams are modulated or shaped, all to conform the dose to the target while minimizing exposure to normal tissue. The field that brings together imaging, physics, and clinical decision-making to design and deliver this kind of therapy is Radiation Oncology.

Radiology, while focused on diagnosing using imaging, doesn’t plan or optimize treatment delivery. Nuclear Medicine uses radiotracers for imaging and targeted radiotherapy but isn’t centered on the beam-angle and depth planning used in external beam radiotherapy. Medical Physics provides the technical backbone for dose calculations and quality assurance, but the practical design of treatment geometry and dose distribution is carried out within Radiation Oncology.