3

one development that helped reduce the exposure time was the use of a fluorescent _ in conjunction with glass photographic plates

he is said to have demonstrated the use of radiographic intensifying screen in 1896

he found that by exposing 2 glass xray plates with emulsion surfaces together, exposure time was halved, and the image was considerably enhanced

demonstration of double emulsion radiography was conducted in _, but the double emulsion film did not become commercially available until _

the demands of the army increased radiologic services made necessary a substitute for the glass plate called

the - was developed in 1898 by the american inventor, Thomas Edison

edison's original fluorescent material was

edison investigated the fluorescent properties of more than 1800 other materials, including _ and _

he was edison's friend who experienced a severe x-ray burn and died in 1904, first x-ray fatality in US

used x-rays to image teeth and found that restricting the x-ray beam with a sheet of lead with a hole in the center, a _, and inserting a leather or aluminum filter improved the diagnostic quality of radiographs

these devices reduce the hazard associated with x-rays

in 1907, HC Snook introduced a sustitue high voltage power supply, an interupterless _, for static machines and induction coils the in use

he unveiled his hot cathode xray tube to the medical community in 1913

it was a vacuum tube that allowed x-ray intensity and energy to be selected separately and with great accuracy

radiology emerged as a medical specialty because of the _ and _

in 1913, he invented the stationary grid, 2 months later, he applied for a second patent for a moving grid

in 1915, he was probably unaware of bucky's patent because of ww1, also invented moving grid

potter-bucky grid was recognized in

diagnostic utz appeared in the _ as did the gamma camera

pet and xray ct were developed in the

mri became an accepted modality in the