| roentgen |
or roentgen (R): Unit of exposure measuring the ionizing ability of g radiation; one r?tgen produces one electric charge (1.6 ?10 -19 C) per 10 6 m 3 of dry air at 0?C and atmospheric pressure. This corresponds to an energy loss of 0.0877 joule per kilogram in air. The r?tgen is no longer accepted for use with the International System.
출처: www.lbl.gov/abc/wallchart/glossary/glossary.html
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| roentgen equivalent |
A measure of dose deposited in body tissue, averaged over the body. One rem is approximately the dose from any radiation corresponding to exposure to one r?tgen of g radiation. The rem is no longer accepted for use with the International System. One rem is equivalent to 0.01 sievert.
출처: www.lbl.gov/abc/wallchart/glossary/glossary.html
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| roentgenogram |
An image produced on film by roentgenography; radiograph is the preferred term.
출처: www.braces.org/braces/dentists/glossary/glossary-r...
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| roentgenography |
Production of permanent images through the use of Roentgen rays (x-rays).
출처: www.braces.org/braces/dentists/glossary/glossary-r...
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| roentgen |
The quantity of x or gamma radiation such that the associated corpuscular emission per 0.001293 grams of dry air produces, in air, ions carrying one electrostatic unit of quantity of electricity of either sign. An amount of energy equal to 2.58 E-4 coulombs/ kg air. The Roentgen is a special unit of exposure and named after Wilhelm Roentgen, a German scientist who discovered x-rays in 1895.
출처: www.oehs.wayne.edu/health%20phsics/glossaryR.html
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