Three-dimensional conformal irradiation with a multilayer energy filter for proton therapy

Takeji Sakae, Akihiro Nohtomi, Akira Maruhashi, Masaru Sato, Katsuhisa Hosono, Toshiyuki Terunuma, Ryosuke Kohno, Yasuyuki Akine, Yoshinori Hayakawa

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)


The first experimental evidence of three-dimensional conformai irradiation is performed by using a new type of filter developed for charged particle radiotherapy. The new filter can yield a static irradiation field where the width of the spread-out Bragg peak is adjusted to the target as a two-dimensional continuous function in the transverse plane. The filter is made of many layers produced by using stereolithography. In the filter, a structure with two regions with different shaped miniaturized ridges is adopted to get a flat dose profile on the spread-out peak. A conformal field around a spherical target is realized by a filter that has a shape corresponding to the outward form of the target.

Original languageEnglish
Pages (from-to)234-236
Number of pages3
JournalReview of Scientific Instruments
Issue number1 I
Publication statusPublished - Jan 2001
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Instrumentation


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