Question

Briefly compare the characteristic curves of an X-ray film and a DR system, and discuss how the film’s latitude compares to the DR’s dynamic range.

Answer 1

A photo courting among the optic density (blackness) of an x-ray film and the publicity is called characteristic curve.The photographic characteristics of an emulsion on an x-ray movie primarily based on plotting the density of the image acquired in opposition to the logarithm of the exposure below particular situations of development.

In X ray film,The shape of the feature curve is largely unbiased of the wavelength of the x-ray or gamma radiation, but the place of the curve along the x-axis, with appreciate to the curve of another film, does depend on radiation satisfactory.The relative exposure that produced a density of 2.5 on Film A is located to be 68.

DR system is called Digital Radiography System.Digital radiography is achieved by way of a gadget including the subsequent practical additives:

• A digital image receptor
• A digital image processing unit
• An image management system
• Image and data storage devices
• Interface to a patient information system
• A communications network
• A display device with viewer operated controls

Its feature and gradient curves depended upon the matrix length used, but did no longer change with the field size