Target to skin distance determination of oblique beams through a solid simulation table.
Oblique beams are commonly used to treat target volumes after cord tolerance is reached. At this institution we rely on the use of the Beams Eye View software to shape boost fields at oblique angles. Before the boost fields begin the patient is taken into the simulator room and set up according to the computerized plan. An integral part in the checking of the boost fields is the verification of the target to skin distances (TSD). Since many simulator couches have a solid top, the posterior oblique TSD cannot be read. With the use of simple geometrical relationships we have found an easy method to check the TSD's, thus aiding in the verification of the computer plan.
Withnell
J
J
Dakota Clinic, Fargo, ND 58103.
D003198:Computer Simulation; D006801:Humans; D011880:Radiotherapy Planning, Computer-Assisted; D012984:Software