Dosimetric characterization of scatter foil‐enhanced contact collimation for small superficial electron beam therapy

Thin metallic foils placed on Cerrobend skin collimators enable a controllable balance between dose uniformity (improved with Al) and conformality with distal sparing (enhanced with Pb). This simple, LINAC-independent configuration offers a cost-effective method for modulating small-field electron beam characteristics and may serve as a practical adjunct for treating superficial lesions.