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the spontaneous emission of a stream of particles or electromagnetic rays in nuclear decay (同)radioactivity
energy that is radiated or transmitted in the form of rays or waves or particles
the act of spreading outward from a central source
a radial arrangement of nerve fibers connecting different parts of the brain
the spread of a group of organisms into new habitats
inflammation of the lungs; caused by a virus or an allergic reaction

PrepTutorEJDIC

〈U〉(光・熱・放射能などの)発散,放射 / 〈C〉放射物;放射線;輻射(ふくしゃ)熱 / 〈C〉(喜び・幸福感などの)発散《+『of』+『名』》 / =radioactivity

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出典(authority):フリー百科事典『ウィキペディア（Wikipedia）』「2013/04/14 21:37:43」(JST)

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Pulmonary radiation injury is a general term for damage to the lungs which occurs as a result of exposure to ionizing radiation. In general terms, such damage is divided into early inflammatory damage (radiation pneumonitis) and later complications of chronic scarring (radiation fibrosis). Pulmonary radiation injury most commonly occurs as a result of radiation therapy administered to treat cancer.^[1]

The lungs are a radiosensitive organ, and radiation pneumonitis can occur leading to pulmonary insufficiency and death (100% after exposure to 50 gray of radiation), in a few months.

Radiation pneumonitis is characterized by:^[2]

Loss of epithelial cells
Edema
Inflammation
Occlusions of airways, air sacs and blood vessels
Fibrosis

References

^ Movsas B, Raffin TA, Epstein AH, Link CJ (April 1997). "Pulmonary radiation injury". Chest 111 (4): 1061–76. doi:10.1378/chest.111.4.1061. PMID 9106589.
^ Coggle, J. E.; Lindop, P. J. (1983). "Medical consequences of radiation following a global nuclear war". In Peterson, J. The Aftermath : the human and ecological consequences of nuclear war. New York: Pantheon Books. pp. 60–71. ISBN 0-394-53446-8.

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1. 放射線療法誘発性肺障害 radiation induced lung injury
2. 同種造血細胞移植後の肺合併症 pulmonary complications after allogeneic hematopoietic cell transplantation
3. 原発性および転移性の肺腫瘍に対する定位放射線療法 stereotactic body radiation therapy for primary and metastatic lung tumors
4. 非転移性新規乳癌に対する放射線治療の手技 radiation therapy techniques for newly diagnosed non metastatic breast cancer
5. ステージIII非小細胞肺癌のマネージメント management of stage iii non small cell lung cancer

English Journal

Computed tomography appearance of early radiation injury to the lung: correlation with clinical and dosimetric factors.

Jenkins P, Welsh A.SourceGloucestershire Oncology Centre, Cheltenham General Hospital, Cheltenham, UK.
International journal of radiation oncology, biology, physics.Int J Radiat Oncol Biol Phys.2011 Sep 1;81(1):97-103. Epub 2011 May 3.
PURPOSE: To systematically assess the spectrum of radiologic changes in the lung after radiation therapy for non-small-cell lung cancer.METHODS AND MATERIALS: We reviewed the cases of 146 patients treated with radical radiotherapy at our institution. All patients had computed tomography (CT) scans p
PMID 21543163