Exam 17: Digital Radiographic Technique

The two principal characteristics of a medical image are _______________________.

If there were such thing as a perfect imaging system, the MTF would be equal to ________.

The human visual system can distinguish ________ shades of gray.

As spatial frequency increases, the object size _____ and the spatial resolution _____.

Of all radiographic imaging systems, _____________ has the best contrast resolution.

What is the spatial frequency of a digital system that can resolve 100 µm?

Digital radiography images should be repeated if there is a problem with _________.

With digital imaging, patient dose can be reduced by using higher ______ techniques.

As mAs is increased the signal-to-noise ratio is ____________.

The use of an image receptor with _____ DQE can result in _____ patient doses. I. low, lower II) high, lower III) high, higher IV) low, higher

The number of gray shades that an imaging system can reproduce is called its ________________.

In digital imaging, spatial resolution is ultimately limited by ___________________.

The use of two screens in imaging results in a higher _______.

If a digital system has a spatial resolution of 4 lp/mm, it can resolve an object as small as _____ mm.

Spatial frequency is used to describe the quality of spatial resolution in terms of _____________.

Screen-film radiography has a dynamic range of __________.

If an image receptor has a high probability of interacting with the x-ray beam, then it has a high _______.

DQE is __________________.

The portion of useful image-forming x-rays is referred to as the ___________.

The bit capacity of each pixel identifies the ___________ of a digital imaging system.