Simple and effective immobilization for radiation treatment of choroidal melanoma

At our institution, patients diagnosed with choroidal melanoma requiring external beam radiation therapy are treated with two 6 MV volumetric-modulated arcs delivering 50 Gy over 5 daily fractions. The patient is immobilized using an Orfit head and neck mask and is directed to look at a light emitting diode (LED) during CT simulation and treatment to minimize eye movement. Patient positioning is checked with cone beam computed tomography (CBCT) daily. Translational and rotational displacements greater than 1 mm or 1 ° off the planned isocenter position are corrected using a Hexapod couch.

Source: Medical Dosimetry - April 27, 2023 Category: Radiology Authors: Monique van Prooijen, Lily Chau, Grace Tsui, Valerie Kelly, Michael Holwell, Tony Tadic, Derek S. Tsang, Hatem Krema, Normand Laperriere Source Type: research