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Cosmic radiation and magnetic fields...

Nicholas, Joyce Shealy.

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Cosmic radiation and magnetic fields: Exposure assessment and health outcomes among airline flight crews.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	Cosmic radiation and magnetic fields: Exposure assessment and health outcomes among airline flight crews./
作者:	Nicholas, Joyce Shealy.
面頁冊數:	224 p.
附註:	Source: Dissertation Abstracts International, Volume: 58-11, Section: B, page: 5897.
Contained By:	Dissertation Abstracts International58-11B.
標題:	Health Sciences, Occupational Health and Safety. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=9816421
ISBN:	9780591677300

Cosmic radiation and magnetic fields: Exposure assessment and health outcomes among airline flight crews.
Nicholas, Joyce Shealy.

Cosmic radiation and magnetic fields: Exposure assessment and health outcomes among airline flight crews. - 224 p.

Source: Dissertation Abstracts International, Volume: 58-11, Section: B, page: 5897.

Thesis (Ph.D.)--Medical University of South Carolina, 1997.

Airline flight crews are chronically exposed to cosmic radiation and to magnetic fields generated by the aircraft's electrical system. Potential disease risks have been identified in health studies among commercial flight crews outside of the United States and among military pilots within the United States. The objectives of this study were (1) to quantify exposure to both cosmic radiation and magnetic fields onboard aircraft, (2) to develop a methodology for estimating career cosmic radiation doses to individual crew members, and (3) to compare mortality among United States commercial pilots and navigators with that of all occupational groups. Cosmic radiation equivalent doses to bone marrow and skeletal tissue were calculated on a flight-by-flight basis. Flight-by-flight calculations were used to develop an estimation methodology for cumulative (career) cosmic radiation doses. Magnetic fields were measured directly onboard aircraft during flight. Health outcomes among United States commercial pilots and navigators were investigated using proportional mortality ratios, proportional cancer mortality ratios, and mortality odds ratios. Based on the sample used in this study, the cosmic radiation equivalent dose to bone marrow and skeletal tissue associated with air travel ranges from 30 to 570 microsieverts per 100 flight hours (not including ground time) depending on altitude, latitude, phase of solar cycle, and flight duration. Magnetic field exposure appears to be characterized by frequencies between 100 and 800 hertz and varies in strength depending on stages of flight, location within the aircraft, and aircraft type. Based on limited measurements, maximum field strengths may increase from 0.6 microtesla in economy class to 1.2 microtesla in first class, suggesting that cockpit exposures may be higher. Potential synergistic effects of cosmic radiation and magnetic fields may be associated with certain cancers found in excess among flight crews, in particular, breast cancer among female flight attendants. Mortality analyses indicate that United States pilots and navigators have experienced significantly increased mortality due to cancer of the kidney and renal pelvis, cancer of the prostate, cancer of the lip, buccal cavity and pharynx, motor neuron disease, external causes of death and accidents. The results of this study support the need for further evaluation of health outcomes experienced by flight crews and the relationship of these outcomes to occupational exposures.

ISBN: 9780591677300Subjects--Topical Terms:

1017799
Health Sciences, Occupational Health and Safety.

Cosmic radiation and magnetic fields: Exposure assessment and health outcomes among airline flight crews.
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