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In 1974, after studies of surveillance programs for coal miners revealed unacceptable degrees of reader variability, [1] NIOSH began the "B" reader program (so named because of the Black lung or Coal Workers' X-ray Surveillance Program), with the intent to train and certify physicians in the ILO Classification system [2] (for classifying radiographs for the presence of pneumoconiosis), so as ...
Welds may be tested using NDT techniques such as industrial radiography or industrial CT scanning using X-rays or gamma rays, ultrasonic testing, liquid penetrant testing, magnetic particle inspection or via eddy current. In a proper weld, these tests would indicate a lack of cracks in the radiograph, show clear passage of sound through the ...
This program is commonly referred to as the "X-Ray Program", derived from "18X". The candidates in this program are known as "X-Rays". Active duty and National Guard components offer Special Forces Initial Accession programs. The active duty program is referred to as the "18X Program" because of the Initial Entry Code on the assignment orders.
As of 2011, 38 states use the NREMT examination for EMT certification and 45 states use the NREMT examination for Paramedic certification. [3] These levels are denoted below using an asterisk (*). At present time, use of the NREMT examination for EMT-Intermediate 85 and 99 have not been included in this list.
Radiography is an imaging technique using X-rays, gamma rays, or similar ionizing radiation and non-ionizing radiation to view the internal form of an object.Applications of radiography include medical ("diagnostic" radiography and "therapeutic radiography") and industrial radiography.
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Industrial Radiography uses either X-rays, produced with X-ray generators, or gamma rays generated by the natural radioactivity of sealed radionuclide sources. Neutrons can also be used. After crossing the specimen, photons are captured by a detector, such as a silver halide film, a phosphor plate, flat panel detector or CdTe detector.
X-ray attenuation of CBCT acquisition systems currently produces different HU values for similar bony and soft tissue structures in different areas of the scanned volume (e.g. dense bone has a specific image value at the level of the menton, but the same bone has a significantly different image value at the level of the cranial base).