Which method is considered the easiest for surface obliquity correction in radiotherapy?

The isodose shift method is recognized as the easiest approach for surface obliquity correction in radiotherapy due to its straightforward application. This method involves shifting the isodose curves to account for the changes in depth caused by the surface angle and contour of the treatment area. It is particularly advantageous because it utilizes existing isodose data, allowing dosimetrists to adjust dose distributions based on predetermined isodose lines without requiring extensive additional calculations or complex equipment.

By applying this method, practitioners can quickly and effectively modify treatment plans to ensure that the prescribed dose is delivered accurately to the intended target volume while respecting the surface contours of the patient. It simplifies the process of achieving optimal dose distributions even when dealing with oblique patients, making it user-friendly and efficient in clinical practice.

In contrast, other methods may involve more complex techniques or require additional measurements that can complicate the treatment planning process. This simplicity and effectiveness make the isodose shift method the preferred choice for surface obliquity corrections.