Radiation therapy, alone or in combination with other treatment, is an important treatment for many cancer cases. More than half of all cancer patients are treated in one or more courses of radiation therapy.
In radiation therapy, intensive energy are directed at cancer cells destroying the genetic material which controls cell growth. Both cancerous and healthy cells are affected by radiation, therefore our goal is to radiate only the targeted cancer cells.
X-rays, being the type of energy, is used in conventional radiation therapy. The electromagnetic waves in X-rays penetrate through most objects because of their physical properties, but this radiation can damage healthy tissue in human body. Frequently doctors reduce the X-ray doses from the optimal cancer-fighting level for protecting surrounding healthy tissue from damage.
The proton beams stop after releasing energy in the target. A proton beam can be sharply controlled, so higher doses of radiation can more safely hit at the tumors with less risk to surrounding healthy tissue.
To certain patients, proton beam therapy has clear advantages in short-term as well as long-term complications. This is of importance when tumors are located next to critical organs.
Proton therapy has been demonstrated beneficial in treating many kinds of tumors, including brain, breast, esophageal, eye, gastrointestinal, gynecological, head and neck, liver, lung, lymphoma, prostate, soft tissue, spine, and many pediatric cancers.
Children with cancer are benefit from proton beam therapy. In conventional radiation therapy children can have the greatest long-term harm because their organs are still under development. The delayed effects of X-ray therapy in children can include growth problems, hearing and vision loss, radiation-induced cancers, and heart disease.
In the field of medical procedures, Proton therapy, or proton beam therapy is a type of particle therapy that uses a beam of protons to irradiate diseased tissue, most often in the treatment of cancer. The chief advantage of proton therapy 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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質子是一種帶正電荷的亞原子粒子。質子始於離子源，在不到 1秒 的時間內，氫原子會被分離成帶負電的電子和帶正電的質子。質子治療是一種使用電離輻射的外照射放療。治療期間，粒子加速器用質子束照射腫瘤。這些帶電粒子破壞腫瘤細胞的DNA，最終導致癌變細胞死亡或乾擾其繁殖能力。因為癌變細胞的高分裂率以及修復受損的DAN能力降低，使得其DNA特別容易受到攻擊。以亞毫米的精確度瞄準腫瘤而不傷害周圍健康組織，同時還能將副作用降至最低。….
质子是一种带正电荷的亚原子粒子。质子始于离子源，在不到 1秒 的时间内，氢原子会被分离成带负电的电子和带正电的质子。质子治疗是一种使用电离辐射的外照射放疗。治疗期间，粒子加速器用质子束照射肿瘤。这些带电粒子破坏肿瘤细胞的DNA，最终导致癌变细胞死亡或干扰其繁殖能力。因为癌变细胞的高分裂率以及修复受损的DAN能力降低，使得其DNA特别容易受到攻击。以亚毫米的精确度瞄准肿瘤而不伤害周围健康组织，同时还能将副作用降至最低。……