A method for achieving variable widths of the spread‐out Bragg peak using a ridge filter | Zendy

Nakagawa Takafumi | Zendy; Yoda Kiyoshi | Zendy

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A method for achieving variable widths of the spread‐out Bragg peak using a ridge filter

Author(s) -

Nakagawa Takafumi,

Yoda Kiyoshi

Publication year - 2000

Publication title -

medical physics

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.473

H-Index - 180

eISSN - 2473-4209

pISSN - 0094-2405

DOI - 10.1118/1.598933

Subject(s) - sobp , monte carlo method , ridge , filter (signal processing) , bragg peak , optics , physics , mathematics , computer science , beam (structure) , geology , statistics , paleontology , computer vision

A method for designing a variable‐SOBP (spread‐out Bragg peak) ridge filter has been proposed. First, ridge filter parameters are determined by using a Monte Carlo calculation followed by a fast two‐step iterative optimization. Then, tilting the ridge filter results in continuous variation of the SOBP width. Monte Carlo calculations show that depth dose uniformity changes from ±1.3% to ±1.6% for SOBP widths ranging from 10.3 cm to 14.5 cm. Advantages of the proposed tilting ridge filter include a capability of continuous SOBP variation and cost‐effective installation for a given SOBP width range.

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