Fig. 4
From: The dosimetric impact of implants on the spinal cord dose during stereotactic body radiotherapy
a and b. The axial view of the entering beams in AIAC models shown in Figure 3A1 and A2. Light blue rays are beam-on and dark blue rays are beam-off treatment positions, respectively. Figure 4A and B show the entering beams with the interaction between beams and rods blocked and unblocked, respectively