radiationとirradiationの
意味の違いってご存知ですか？
非常によく似た単語なので、当然、意味も類似しているのですが、
実際の意味や使用方法にはそれなりの違いがあります。
その違いを調べてまとめてみました。
いまのところ、こう考えています。
radiationは単純に放射という意味で
irradiationは放射される対象物がある程度明確で
その対象物に向けて、光などを照射する場合に使用するのだと‥
irradiation ⇒ 照射（レーザー脱毛などに使用）
radiation ⇒ 放射（放射線治療などに使用）
irradiationとradiationの意味の違いについて
「irradiation」と「radiation」の意味の違いについて
同じような疑問をもっている人はいるようですね。
学術的に使う場合には気になります、やぱり。
動詞のradiateは 放つ (例えば光を放つ）
動詞のirradiate は、光にさらされる 光を被る
これだけでなるほどといった感じですね。
Irradiation is the process by which an item is exposed to radiation. The
exposure can originate from any of various sources, including those occurring
naturally, or as part of a mechanical process, or otherwise. In common usage the
term …
In physics, radiation is a process in which energetic particles or energy or
waves travel through a medium or space. There are two distinct types of
radiation; ionizing and non-ionizing. The word radiation is commonly used in
reference …
放射と照射の言葉の意味について
放射とは輻射ともいう。電磁波を放出すること，または放出された電磁波や粒子線の総称。電磁波の場合には，波長によって，赤外線，可視光線，紫外線，X線，γ線などに分けられる。
一方、照射とは
１ 日光などが照らすこと。「照射時間」
２ 治療のために赤外線や放射線を当てること。ふつうX線・α(アルファ)線・γ(ガンマ)線などについていう。「X線を照射して胸部のレントゲン写真をとる」
Radiationの使用例
Radiationの使用例です。公益社団法人日本放射線腫瘍学会（JASTRO Japanese Society for Radiation Oncology）からの引用です。
Patients number situation of radiation treatment and future predictions
Radiation therapy, along with surgery and chemotherapy are the 3 key institutional approaches for cancer treatment. Radiation therapy cancer treatment plays an important role in the multidisciplinary treatment, reduces strain on the body with high curability. Contribute as palliative treatment to relieve symptoms, while sapping the radical cure patient. In the United States, cancer radiation treatment is applied to two-thirds of the patients reported *1.
On the other hand, in Japan, only 25 percent of new patients applied for *2.
This low Japanese rate is recognized as a structural problem of treatment; therefore, it became the country’s priority promotion of radiation treatment covered in the basic insurance plan. The large difference on applicable rate between Japan and USA is actually a potential for an upcoming development.
※2 New Radio Therapy Patients Regional Cancer Registration
Radiation is energy that travels ‥
Radiation is energy that travels in the form of waves or particles and is part of our everyday environment. People are exposed to radiation from cosmic rays, as well as to radioactive materials found in the soil, water, food, air and also inside the body.
Human-made radiation sources are widely used in medicine, industry, and research. There are two types of radiation: ionizing and non-ionizing radiation.
Irradiationの使用例
下記は、レーザー脱毛に関する論文からの引用です。
Unconventional Uses of Laser Hair Removal: A Review
Abstract
Laser hair removal since its availability has been primarily used for aesthetic purposes. Over the years, it has emerged as an important therapeutic modality in various dermatological and surgical disorders, both as an adjuvant and as a monotherapy. Depending on the skin type, all laser hair removal systems have been used with good results and minimal complications. We hereby review the diverse range of unconventional indications of laser hair removal.
Keywords: Folliculitis decalvans, hairy flaps, hidradenitis suppurativa, laser hair removal, pilonidal sinus, unconventional indications
Saima Aleem and Imran Majid, J Cutan Aesthet Surg. 2019 Jan-Mar; 12(1): 8–16.
Pseudofolliculitis barbae 須毛部仮性毛包炎（Pseudofolliculitis barbae: PFB）
Papule counts performed 90 days after treatment using the highest doses tolerated
by the epidermis (50, 100, and 100 J/cm2 for type IV, V, and VI skin, respectively)
were significantly reduced in the laser-irradiated area as compared to the control.[43]
43. Ross EV, Cooke LM, Overstreet KA, Buttolph GD, Blair MA. Treatment of pseudofolliculitis barbae in very dark skin with a long pulse nd:YAG laser. J Natl Med Assoc. 2002;94:888–93.
※Unconventionalとは：型にはまらない，自由な； 慣習［因襲］にとらわれないという意味です。ロングマンの英英辞典では、「very different from the way people usually behave, think, dress etc」と記載されています。
トリア・家庭用レーザー脱毛器
tria（トリア）ア・パーソナルレーザー脱毛器プレシジョンです。なんと、 世界でシリーズ500万台突破の脱毛器！レーザーだから光にはない脱毛力を実現。脱毛ずみのはずが…ちょい生えムダ毛はレーザーにお任せなんですね。
Food Irradiation: What You Need to Know
食品照射とは、食品にX線、ガンマ線や電子線などの放射線を照射することによって貯蔵期間の延長と殺菌・殺虫などを行う技術のことである。
Irradiation does not make foods radioactive, compromise nutritional quality, or noticeably change the taste, texture, or appearance of food. In fact, any changes made by irradiation are so minimal that it is not easy to tell if a food has been irradiated.
Food irradiation (the application of ionizing radiation to food) is a technology that improves the safety and extends the shelf life of foods by reducing or eliminating microorganisms and insects. Like pasteurizing milk and canning fruits and vegetables, irradiation can make food safer for the consumer. The Food and Drug Administration (FDA) is responsible for regulating the sources of radiation that are used to irradiate food. The FDA approves a source of radiation for use on foods only after it has determined that irradiating the food is safe.
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