Items tagged “snippets”

The 5 gauss line is the safety line drawn around the perimeter of the main magnet of the MRI scanner, specifying the distance at which the stray magnetic field is equivalent to 5 gauss (0.5 mT). Five gauss and below are considered 'safe' levels of static magnetic field exposure for the general ...

Optical density is a measure of the degree of radiographic film darkening, and is related to the proportion of incident x-ray photons that are transmitted through the tissue and strike the film 1. Usage Optical density is used to describe the level of film exposure in film-screen radiography. ...