What patient data is necessary for treatment planning?

The necessary patient data for treatment planning in medical dosimetry includes relevant contours and treatment position. This information is essential because it directly impacts the way radiation therapy is tailored to the individual patient's anatomy and the specific target volume.

Contouring refers to the process of delineating the target area for treatment as well as surrounding organs at risk (OAR) on imaging studies such as CT or MRI. This step is crucial in order to define the spatial relationship between the tumor and critical structures, thereby allowing for a more precise delivery of radiation. The treatment position is equally important as it ensures consistency and accuracy in dose delivery over multiple sessions.

These two facets of information help in constructing a safe and effective treatment plan that minimizes exposure to healthy tissues while maximizing tumor control, thereby improving treatment outcomes and reducing potential side effects for the patient.