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Radiographic films irradiated with 6 MV X‐rays. (a) Multileaf collimator (MLC)–80 with 1‐cm leaf width. (b) MLC‐120 with 0.5‐cm leaf width. (c) Dual‐layer micro‐MLC with 0.32‐cm leaf width. (d) Cerrobend (Cerro Metal Products, Bellefonte, PA) blocks.
