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放射治療 Radiotherapy

認識放射治燎

認識放射治療

放射治療(Radiotherapy),顧名思義,就是利用高能量的放射線,去治療癌症。1, 2
放射治療的作用包括根治癌症、減低復發機會,及紓緩癌症症狀。1
在臨床癌症治療中,有約一半患者都會在某個階段接受放射治療。3

放射治療是甚麼?

放射治療的原理

放射治療的原理是利用高能量的放射線,一般是X光,去破壞癌細胞的DNA,使其不能生長而死亡。1, 3

與化療等系統性治療(能透過血液,針對全身細胞的治療)的分別是,放射治療能夠局部針對需要治療的身體部位,減低對健康細胞的影響。3, 4

雖然在放射治療的射線範圍內,健康細胞與癌細胞是一同存在,並接受相同的放射劑量,但對於不斷分裂繁殖中的癌細胞,放射線的殺傷力遠高於在靜止期的健康細胞,所以放射線能夠瞄準並消滅癌細胞。就算健康細胞有受損,但由於其自我修復能力較好,故正常組織仍能保持一定功能。5

放射治療的種類

體外放射治療

體內放射治療

  • 癌症的類型
  • 腫瘤的大小
  • 腫瘤在體內的位置
  • 患者的健康狀況及病史
  • 患者會否接受其他類型的癌症治療
  • 其他因素,如年齡等

甚麼人適合放射治療?

病人支援

確診癌症後,有甚麼可以問醫生?

以下是一些可能幫助癌症患者了解自己是否適合放射治療,並與醫生討論治療方案的相關問題:3, 11

  • 甚麼是放射治療?
  • 我需要放射治療嗎?有規定治療次數嗎?
  • 有其他治療可以替代嗎?
  • 接受放射治療期間,能夠如常上班,做其他日常活動嗎?需要住院接受治療嗎?
  • 放射治療會導致什麼副作用?會很辛苦嗎?如出現副作用,可以怎麼辦?
  • 在放射治療期間,在飲食上,有甚麼需要注意的嗎?
  • 有什麼日常注意事項?

立即向醫生發問,現在問,發現更多可能!

  1. Cancer Research UK. What is radiotherapy. Available at: www.cancerresearchuk.org/about-cancer/treatment/radiotherapy/what-is-radiotherapy. Accessed Aug 2024.
  2. National Cancer Institute. Radiation therapy to treat cancer. Available at: www.cancer.gov/about-cancer/treatment/types/radiation-therapy. Accessed Aug 2024.
  3. American Cancer Society. How radiation therapy is used to treat cancer. Available at: www.cancer.org/cancer/managing-cancer/treatment-types/radiation/basics.html.Accessed Aug 2024.
  4. National Cancer Institute. Definition of systemic therapy. Available at: www.cancer.gov/publications/dictionaries/cancer-terms/def/systemic-therapy. Accessed Aug 2024.
  5. Hong Kong Cancer Fund. 認識癌症:放射治療. Available at: www.cancer-fund.org/wp-content/uploads/2017/04/%E6%94%BE%E5%B0%84%E6%B2%BB%E7%99%82.pdf. Accessed Aug 2024.
  6. NHS. Radiotherapy: Overview. Available at: www.nhs.uk/conditions/radiotherapy/. Accessed Aug 2024.
  7. Cancer Research UK. About radiotherapy side effects. Available at: www.cancerresearchuk.org/about-cancer/treatment/radiotherapy/side-effects/general/about.Accessed Aug 2024.
  8. American Cancer Society. Radiation therapy side effects. Available at: www.cancer.org/cancer/managing-cancer/treatment-types/radiation/effects-on-different-parts-of-body.html. Accessed Aug 2024.
  9. National Cancer Institute. Radiation therapy side effects. Available at: www.cancer.gov/about-cancer/treatment/types/radiation-therapy/side-effects. Accessed Aug 2024.
  10. Hong Kong Anti-Cancer Society. 放射治療:放射治療的副作用及護理. Available at: www.hkacs.org.hk/ufiles/Radiotherapy.pdf. Accessed Aug 2024.
  11. MedlinePlus. Radiation therapy – questions to ask your doctor. Available at: medlineplus.gov/ency/patientinstructions/000187.htm. Accessed Aug 2024.

此網站為香港市民而設。內容僅供參考,並不能代替醫生的診斷或建議。詳情請向醫生查詢。

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border-right: 1px solid white; border-bottom: 1px solid white; padding:0px; color:#000; } .wp-block-table.p2_table_2 tr:nth-child(3) td:nth-child(4), .wp-block-table.p2_table_2 tr:nth-child(4) td:nth-child(3), .wp-block-table.p2_table_2 tr:nth-child(4) td:nth-child(3), .wp-block-table.p2_table_2 tr:nth-child(5) td:nth-child(4), .wp-block-table.p2_table_2 tr:nth-child(6) td:nth-child(2), .wp-block-table.p2_table_2 tr:nth-child(7) td:nth-child(3), .wp-block-table.p2_table_2 tr:nth-child(8) td:nth-child(2), .wp-block-table.p2_table_2 tr:nth-child(9) td:nth-child(4), .wp-block-table.p2_table_2 tr:nth-child(10) td:nth-child(2), .wp-block-table.p2_table_2 tr:nth-child(11) td:nth-child(3), .wp-block-table.p2_table_2 tr:nth-child(12) td:nth-child(2), .wp-block-table.p2_table_2 tr:nth-child(13) td:nth-child(3), .wp-block-table.p2_table_2 tr:nth-child(14) td:nth-child(3){ min-width: 230px; border-right: 1px solid white; border-bottom: 1px solid white; padding:0px; color:#000; } .wp-block-table thead,.wp-block-table thead th{ border-bottom: 0px solid; } .p2_table table tbody tr:nth-child(even),.p2_table_2 table tbody tr,.p2_table_2 table tbody tr:nth-child(even){ background-color:#FFFAF8; } .p2_table table tbody tr:nth-child(odd),.p2_table_2 table tbody tr,.p2_table_2 table tbody tr:nth-child(odd){ background-color:#FFEBE1; } .p2_table table thead th:nth-child(1){ background-color:#FFFAF8; border-radius: 25px 25px 0 0; padding-top: 10px; } .p2_table_2 table thead th:nth-child(1){ background-color:#FFFAF8; border-radius: 10px 10px 0 0; padding:5px 0px; } .p2_table_2 table thead th:nth-child(2){ width:0px; } .p2_table table tbody td:nth-child(2),.p2_table table tbody td:nth-child(3){ color:#722701; font-weight: 700; } .p2_table table tbody td:nth-child(2) ul:nth-child(1){ margin:0px; display: inline-block; width: 390px; padding-top: 15px; padding-bottom: 15px; } .p2_table table tbody td:nth-child(3) ul{ margin:0px; display: inline-block; width: 280px; } .p2_table ,.p2_table_2{ color:#722701; font-weight: 700; } .p2_table table tbody tr:nth-child(5) td:nth-child(1){ border-radius: 0px 0px 0px 25px; } .p2_table table tbody tr:nth-child(5) td:nth-child(2){ border-radius: 0px 0px 25px 0px; } .p2_sub_col1 div.mh-columns-inner div.mh-column,.p2_sub_col2 div.mh-columns-inner div.mh-column{ margin:0px; } .p4_list{ max-width:600px; } .plan_btn1{ width: 225px; } .QA_img{ min-width:65px; width:65px; } .QA_bar{ width:100%; max-width:800px; } .support_btn1{ width: 255px; } .QA_btn1{ width:250px; } figure.lightning{ width:200px; margin:auto; } ul.p4_tab_list_1 li::before{ background-color:#722701; } ul.p4_tab_list_1 li{ margin: 0; } ul.p4_tab_list_1 { margin: 0px; padding: 0px; } #what_is .pie_chart_text2{ width:100%; text-align:right; } figure.img_pie_chart_line1 { width: 30%; margin-top: -16%; margin-left: 50%; margin-bottom: -3%; } figure.img_pie_chart_line2 { width: 10%; margin-top: -4%; margin-left: 35%; margin-bottom: -10%; z-index: 1; } .p2_dot_list{ gap: 0em; } .p4_stack .p2_dot_list{ width:100%; } .p4_stack .p2_dot_list p{ text-align:justify; margin-top: -5px; } #what_is .p2_dot_list p { text-align:left; margin-top: -5px; } .p2_dot{ width:18px; height:18px; min-width:18px; min-height:18px; } .w100{ width:100%; } #mconnect-theme-banner-container-4373 > div > div > div > div > div.banner__content.sub__entry__content > div > a,#mh_back_to_top_link > a,.cta_btn{ background-color:#c94800; border: 1px #FFF solid; } sup{ white-space: pre; } .mh-nav-side-accordion ul li{ margin: 20px 0; } .mh-tabs–primary .mh-tabs-nav .mh-tabs-control .mh-tabs-control-next, .mh-tabs–primary .mh-tabs-nav .mh-tabs-control .mh-tabs-control-prev{ padding: 0px 8px; height: 40px; } .QA_list{ max-width: 800px; width: 100%; } .mh-nav–primary li:hover{ color: #298C89; border-bottom: 0.125rem solid; padding: 0 0; height: 40px; } .mh-nav–primary .mh-submenu li:hover{ color: #298C89; border: none; padding: 0 0; height: 40px; } .footer_code::before { content: “HK-KEY-00975/Jun 2025”; color:#000; }