Concerning a digital radiography system:

An early step in image acquisition is conversion of data from an analogue to digital format

The size of the image detector is not important, as the final image may be manipulated electronically

Detector sensitivity must be high

Pixel size influences image resolution

Noise is less significant than with film-screen radiography

The requirements of a digital radiography system are:

Good X-ray sensitivity

A small field size

A digital-to-analogue converter (DAC)

A narrow dynamic range

A locally based archive

Concerning the digital radiographic image:

It is represented numerically in digital form

The image is divided into a matrix consisting of multiple pixels

The greater the sampling frequency, the greater the spatial resolution

Decreasing the detector sampling frequency may reduce detector sensitivity

The image may be read out directly from the detector electronically

Concerning the digital radiographic image:

Signal digitization expresses the image as continuous grey-scale values

The function of the analogue-to-digital converter (ADC) is to digitize the input while maintaining resolution of the information

A binary system is used for signal digitization

Eight bits is typically sufficient for most images

Data compression for storage may lead to loss of data

The number of bytes of a digital image is dependent upon:

The number of pixels within the image

Pixel size, assuming matrix size is constant

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