Figure 1From: Intensity-modulated Total Body Irradiation (TBI) with TomoDirect™ Twelve beams with equally spaced angles were used for the head-first-plan. The beams were expanded (yellow part of the beam) laterally on both edges by a maximum of 5 leaves each (3,125 cm at isocenter). This expansion is limited if leaves on the end of the MLC are already used because of the patient size.Back to article page