A Pinhole Camera for Radiation Research in Dentistry

Autor:	Albert G. Richards
Rok vydání:	1962
Předmět:	0301 basic medicine Materials science business.industry Radiography Photography Dentistry 030206 dentistry Radiation law.invention 03 medical and health sciences 030104 developmental biology 0302 clinical medicine Optics law Pinhole camera business General Dentistry
Zdroj:	Journal of Dental Research. 41:29-40
ISSN:	1544-0591 0022-0345
DOI:	10.1177/00220345620410013201
Popis:	The design and theory of a pinhole camera that produces simultaneously radiographs and photographs of any object which emits x radiation and reflects visible light are described. Such a camera is useful for radiation research in dentistry because both the patient and the x-ray apparatus emit x radiation and reflect visible light while the patient is examined with x rays. The factors controlling time of exposure, size, and sharpness of the image are presented mathematically. Photographs and radiographs that were produced simultaneously of dental subjects are illustrated. Satisfactory photographs were made with the pinhole camera with exposures ranging between 35 to 60 min. Radiographic exposures made with radiation generated with 90 kvp ranged between 1500 and 4500 ma-sec. (H.H.D.)
Databáze:	OpenAIRE
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