Sensitometry, Densitometer, The D and log E Curve A comprehensive Guide With Correct Answers Graded A+.

What does Sensitometry measure? - correct answer measures the response of film to exposure and processing What does Sensitometry evaluate? - correct answer it evaluates and maintains exposure factor systems, intensifying screems, monitors processing equipment, film What does Senditometry maintain? - correct answer It maintains technical exposure factor charts used in mamography to see suttle changes in density Senitometry - correct answer accomplished by exposing and processing a film then it evaluates the resulting densities What is a densitometer or sensitometer used for? - correct answer used to create a uniform set of densities on a film What does a Densitometer provide? - correct answer it provides the measurement of light transmitted through film What does densitometer measure? - correct answer optical density(OD) Densitometer, aka step wedge - correct answer used to monitor x-ray equipment, also used to monitor film screen combinations and not recommended for processor monitor What is a sensitometer used to control? - correct answer light source which produces the same amount of light each time it is triggered What is the sensitometer also called? - correct answer light penetrometer Sensitometer - correct answer available in 11 or 21 step versions What does the 11 step version consist of in the sensitometer? - correct answer it increases density by a factor of 2 for each step What does the 21 step version consist of in the sensitometer? - correct answer it increases density by a factor of the square root of 2(1.41) for each step Densitometer - correct answer uniform light source and an optical sensor and calibration control allows for easy calibration Optical Density(OD) - correct answer precise numerical value What is optical density calculated by? - correct answer measuring Io and It and Io is intensity of incident light, low optical density and It is intensity of transmitted light Densitometer with OD - correct answer OD is a logarithmic function which allows a wide range of values of small numbers What are the optical density ranged - correct answer It ranges from 0-4 which corresponds from clear to black 0-clear and 4-black what does optical density mean? - correct answer An OD of 4 means that only 1 in 10,000 light photons is capable of penetrating the film What is the Optical Density Formula - correct answer OD=log10 Io/It What does Zero mean on the OD range? - correct answer 100% of the light is transmitted through the film so the film is clear What does Four mean on the OD range? - correct answer none of the light transmits through film so the film is black What is opacity? - correct answer ability of a film to stop light transmission formula What is Characteristic Sensitometric? - correct answer describes relationship between density and exposure, normally shown as a graphic relationship its the film responses to exposure What does the D and log E curve aka? - correct answer sensitometric curve, sharacteristic curve, Hurter and Driffield curve What are the roots of sensitometry? - correct answer they lie in analysis of radiographic film 0.3 of log 10 2 - correct answer 50% mor light is transmitted What is the typical diagnostic rang