J Med Phys Close
 

Figure 2: (a) Schematic of step-by-step (1–7) working principle of solitary dynamic portal. (1) Differential separations in the chest wall anatomy, (2) representation of an open beam, (3) tilt in isodose distribution toward lesser separation due to chest wall geometry without Field-in-field, (4 and 5) high-dose and low-dose regions across chest wall, (6) proposed isodose tilt toward higher separation using solitary dynamic portal in the medial direction, and (7) final dose distribution. (b) Schematic of control fields arrangement. Opposing tangent plane and its normal axis (dotted line) and control fields with angle θ with respect to tangents (solid line)

Figure 2: (a) Schematic of step-by-step (1–7) working principle of solitary dynamic portal. (1) Differential separations in the chest wall anatomy, (2) representation of an open beam, (3) tilt in isodose distribution toward lesser separation due to chest wall geometry without Field-in-field, (4 and 5) high-dose and low-dose regions across chest wall, (6) proposed isodose tilt toward higher separation using solitary dynamic portal in the medial direction, and (7) final dose distribution. (b) Schematic of control fields arrangement. Opposing tangent plane and its normal axis (dotted line) and control fields with angle θ with respect to tangents (solid line)