Proton therapy

（重定向自Proton Beam Therapy）

In a typical treatment plan for proton therapy, the spread out bragg peak (SOBP, dashed blue line) is the therapeutic radiation distribution. The SOBP is the sum of several individual Bragg peaks (thin blue lines) at staggered depths. The depth-dose plot of an X-ray beam (red line) is provided for comparison. The pink area represents additional doses of X-ray radiotherapy—which can damage normal tissues and cause secondary cancers, especially of the skin.[1]

Irradiation of nasopharyngeal carcinoma by photon (X-ray) therapy (left) and proton therapy (right)

Control panel of the synchrocyclotron at the Orsay proton therapy center, France

Proton therapy or proton beam therapy is a medical procedure, a type of particle therapy that uses a beam of protons to irradiate diseased tissue, most often in the treatment of cancer. Proton therapy's chief advantage over other types of external beam radiotherapy is that as a charged particle the dose is deposited over a narrow range and there is minimal exit dose.

单词	Proton Beam Therapy
释义	Proton Beam Therapy 英语百科 Proton therapy （重定向自Proton Beam Therapy） Proton therapy or proton beam therapy is a medical procedure, a type of particle therapy that uses a beam of protons to irradiate diseased tissue, most often in the treatment of cancer. Proton therapy's chief advantage over other types of external beam radiotherapy is that as a charged particle the dose is deposited over a narrow range and there is minimal exit dose.
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