確定的影響のしきい値（大人の場合）（国際放射線防護委員会1990年勧告）

大部分の組織

1 回照射される場合　　　　　：数Gy
何年間も放射線を受ける場合　：年当たり約0.5グレイ

生殖腺

一時的不妊（男性）　　　　　：1 回照射で0.15グレイ
永久不妊（女性）　　　　　　：急性照射で約2.5～ 6 グレイ

眼の水晶体

水晶体混濁　　　　　　　　　：急性照射で約 2 ～10グレイ

骨髄　造血機能低下　　　　　　　　：骨髄全体の急性照射で約0.5グレイ

国際放射線防護委員会の変遷

1962年　女性の下腹部の検査は月経開始後10日以内に（10日規則）

(根拠)「胎児，特に妊娠初期は細胞分裂が盛んである」および「分裂の盛んな細胞ほど放射線に弱い」という見解

1983年　10日規則を撤回
1999年　放射線診断による胎児被ばくが妊娠中絶を正当化する理由にならない

「妊娠中絶をするのに 100mGy未満の胎児線量を理由にしてはいけない」
「受胎産物（胎児）が100mGyの吸収線量を被ばくした場合，子供が奇形を持たない確率はほぼ97%，子供（0～19歳）ががんにならない確率は99.1%」

参考

テーマ：国際放射線防護委員会ICRPの見解の変遷に伴って臨床放射線医学に生じた社会的問題－妊娠と医療放射線を中心に－

http://www.jcr.or.jp/news144/144_3b.html

「10-days-rule（10日規則）」の撤回について

http://www.medicmedia.com/doctor/qa/

WordNet

mark or draw with a ruler; "rule the margins"
keep in check; "rule ones temper" (同)harness, rein
the duration of a monarchs or governments power; "during the rule of Elizabeth"
measuring stick consisting of a strip of wood or metal or plastic with a straight edge that is used for drawing straight lines and measuring lengths (同)ruler
(mathematics) a standard procedure for solving a class of mathematical problems; "he determined the upper bound with Descartes rule of signs"; "he gave us a general formula for attacking polynomials" (同)formula
(linguistics) a rule describing (or prescribing) a linguistic practice (同)linguistic rule
prescribed guide for conduct or action (同)prescript
a principle or condition that customarily governs behavior; "it was his rule to take a walk before breakfast"; "short haircuts were the regulation" (同)regulation
any one of a systematic body of regulations defining the way of life of members of a religious order; "the rule of St. Dominic"
directions that define the way a game or sport is to be conducted; "he knew the rules of chess"
decide with authority; "The King decreed that all firstborn males should be killed" (同)decree
decide on and make a declaration about; "find someone guilty" (同)find
have an affinity with; of signs of the zodiac
the time after sunrise and before sunset while it is light outside; "the dawn turned night into day"; "it is easier to make the repairs in the daytime" (同)daytime, daylight
time for Earth to make a complete rotation on its axis; "two days later they left"; "they put on two performances every day"; "there are 30,000 passengers per day" (同)twenty-four hours, twenty-four hour period, 24-hour interval, solar day, mean solar day
a day assigned to a particular purpose or observance; "Mothers Day"
a period of opportunity; "he deserves his day in court"; "every dog has his day"
an era of existence or influence; "in the day of the dinosaurs"; "in the days of the Roman Empire"; "in the days of sailing ships"; "he was a successful pianist in his day"
some point or period in time; "it should arrive any day now"; "after that day she never trusted him again"; "those were the days"; "these days it is not unusual"
the period of time taken by a particular planet (e.g. Mars) to make a complete rotation on its axis; "how long is a day on Jupiter?"
the recurring hours when you are not sleeping (especially those when you are working); "my day began early this morning"; "it was a busy day on the stock exchange"; "she called it a day and went to bed"
manage or run; "tend a store"
have a tendency or disposition to do or be something; be inclined; "She tends to be nervous before her lectures"; "These dresses run small"; "He inclined to corpulence" (同)be given, lean, incline, run
have care of or look after; "She tends to the children"
being one more than nine (同)10, x
the cardinal number that is the sum of nine and one; the base of the decimal system (同)10, X, tenner, decade
the time during which someones life continues; "the monarchs last days"; "in his final years" (同)years

PrepTutorEJDIC

〈C〉『規則』,規定;法則 / 〈C〉『慣例』,慣習;通例,通則 / 〈U〉『支配』,統治;統治期間;統治権 / 〈C〉ものさし,定規(ruler) / 〈国・人など〉‘を'『支配する』,統治する,統御する / 《しばしば受動態で》〈感情などが〉〈人,人の行動など〉‘を'左右する,動かす / 〈裁判所・裁判官などが〉…‘と'裁決する,決定する / 〈紙〉‘に'線を引く / (…を)『支配する』,統治する《+『over』+『名』》 / (…について)裁決する,判定する《+『on』+『名』》;(…に反対の)裁決をする《+『against』+『名』(do『ing』)》・〈米俗〉抜群である、最高である
〈U〉〈C〉『昼間』,『日中』 / 〈C〉『1日』,1昼夜,日 / 〈C〉(労働や勉強の単位の)1日 / 〈C〉(物事が予定された)日・期日;《しばしばD-》祝日 / 〈C〉《しばしば複数形で》(過去・現在・未来いずれかの)『時代』;現代 / 〈C〉《しばしば複数形で》『一生』,生涯;《所有格の旧詞・代名詞とともに槻数形で》(…の)『全先宗代』,活動期 / 〈U〉《the ~》戦い,勝負
〈人が〉(…の)『傾向がある』,(…)しがちである / 〈物事が〉(ある方向に)向かう,(ある状態に)向かう
〈人・動植物など〉‘の'『世話をする』,めんどうをみる / 《米》〈店〉‘の'番をする / 《tend to+名》…に気をつける,心を配る
〈C〉(数の)『10』,10の記号(10,Xなど) / 〈U〉10時,10分;10歳 / 〈U〉《複数扱い》10人,10個 / 〈C〉10(10人,10個)一組のもの / 〈C〉(カードケームの)10の札 / 『10の』,10人の,10個の / 《補語にのみ用いて》10歳の(で)
たいてい昼間は

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English Journal

Optimization and risk analyses for rule curves of reservoir operation: application to Tien-Hua-Hu Reservoir in Taiwan.

Kuo JT, Hsu NS, Chiu SK.SourceDepartment of Civil Engineering and Hydrotech Research Institute, National Taiwan University, Taipei 106, Chinese Taiwan. kuoj@ntu.edu.tw
Water science and technology : a journal of the International Association on Water Pollution Research.Water Sci Technol.2006;53(10):317-25.
Tien-Hua-Hu Reservoir is currently under planning by the Water Resources Agency, Taiwan to meet the increasing water demands of central Taiwan arising from rapid growth of domestic water supply, and high-tech industrial parks. This study develops a simulation model for the ten-day period reservoir o
PMID 16838718

[Meconium periorchitis. Two case reports].

Bouhafs A, Bouvier R, Dodat H.SourceService de chirurgie pédiatrique, pavillon T bis, hôpital Edouard-Herriot, 69437, Lyon, France.
Archives de pédiatrie : organe officiel de la Sociéte française de pédiatrie.Arch Pediatr.2001 May;8(5):504-7.
CASE REPORTS: Two cases of meconium periorchitis respectively in a ten-day- and a five-month-old infant are reported. The presenting symptom was a scrotal mass, isolated in one case and associated with pain and inflammation in the other case. Intraoperative histological diagnosis allowed conservativ
PMID 11396111

Radioiodine treatment in unsuspected pregnancy.

Evans PM, Webster J, Evans WD, Bevan JS, Scanlon MF.SourceDepartment of Endocrinology, University Hospital of Wales, Cardiff.
Clinical endocrinology.Clin Endocrinol (Oxf).1998 Mar;48(3):281-3.
OBJECTIVE: Radioiodine is being used increasingly as first line therapy for hyperthyroidism. Our aim is to highlight some of the difficulties which can occur following the use of 131I to treat hyperthyroidism in fertile women.PATIENTS: We present 3 cases of young women to whom radioiodine was given,
PMID 9578816

Japanese Journal

医療における放射線防護の意識調査 : 第1報放射線防護の基礎知識と放射線への不安について

飯田泰治,山本友行,島田裕弘
日本放射線技術學會雜誌 53(10), 1551-1563, 1997-10-20
… Twenty-seven percent of doctors, 49% of nurses and 80% of the general public did not know the "ten-day rule". …
NAID 110003437750