Unit 3 exam

The more light spread the ___ the MTF

Each square in a matrix is called a

If 2 few pixels are sampled the results will be ____

Effort to display pixel of area of interest when exposure is greater/less than needed to produce an image ___ occurs

All of the following are components of a PACS except

An archive query retrieves images from the PACS based on any of the following except

Early PACS were first developed

Window width controls the ratio of black and white aka

Which of the following statements isn’t true

Deviation index is the diff between ___ and ___ expressed in logarithmic fashion

Implication of the frequency of the areas of interest is known as

Storage phosphor plate are similar to

One of the early goals related to the development of PACS was to

Automatic rescaling means that images are produced regardless of the amount of exposure with ___

Averaging the frequency of each pixel with surrounding pixel values to remove high frequincy noise is called

Which modality was the first to use the principal of digital imaging

The process of jointing two or more images into one continuous image

Multiple numeric values divided into an array of small elements capable of being processed is the definition of__ images

The active element in a storage phosphor is

The nyquist theorem states that

Improper algorithm application may result in

The efficiency of a system to convert xray input signal into a useful output image

Magnification of the entire image at the work station

The sum of the components in a recording system can not be greater than the system as a whole

High pass filtering is useful for enhancing

Factors that can adversely affect the pixel values expressed in the deviation index include all of the following except

A systems ability to respond to varying levels of exposure resulting in more detail is called

Image level parameters control image _____

Compared with a 90 second processing time found in CR image acquisition with DR has now been reduced to

Intensifying screens

The size of the pixel is determined by the

The number of bits per pixel is known as Bit

Changing the slope of the lookup table graph will increase/decrease

An image manipulation process that fills in the background so that it is darkened

A lookup table is not used as reference to

Exposure latitude is to conventional radiography as __ is to DR

If the entire range of exposure were digitized pixel values representing ___ would be digitized

A perfect image processing system would have an MTF of

The ability of an imaging system to demonstrate small details of an object is known as

A histogram displays the useful signal by locating

The longer the image is stored in a CR cassette the ____

Which of the following best describes the sequence for psp image capture

Technologist efficiency ratings are generally the same when comparing conventional radiography with ___ radiography

Changing the steepness of the exposure gradient

Teleradiology was first conceptualized by

With conventional radiography optical density is primarily controlled by

Low pass filtering is also known as

Film and intensifying screens are primarily used in:

The ___ converts xray energy directly to a digital electrical signal

In conventional radiography film processing the sensitivity speck has which electrical charge

First commercial CT scanners could image the ___

The ability of a digital system to display subtle changes in shades of gray is called

If pixel has a bit depth of 2 to the 9th the number of gray tones that pixel can produce is

Focal spot and oid effect image sharpness ____ imaging

How dark or light a digital image appears on a display monitor is known as

Critical characteristics of a digital image include all of the following except

Xray absorber typically used indirect capture DR is a

Failure of the reader to find the collimation edges of an image

Which of the following statements is not true

Excessive light entering the eye when viewing the image is known as ____ glare

If all the shades were left in an image after processing the contrast would be

Proper pt demographic input is the responsibility of

Raw data used to form the image histogram are compared with

Input of annotation for identification of the pts right or left side

The more manipulation of the image the greater the ____

The image reader scans and reads the image from the _____

The range of exposure values the image detector is able to produce is known as

Proper patient demographics image ensures

Who was the first to incorporate digital imaging with CT scanner

CR requires an image thru ____

Suppressing frequencies in the area of interest is known as

In DR system which of the following are needed to produce a radiographic image

Is this high or low frequency kVp technique

Preset image annotation controls include all of the following except

The measurement for radiation that was incident on the IR for a particular exposure is known as

Data collected within the collimator are represented by

In which decade was the first commercial MRI introduced

Which two modalities could easily be converted to digital imaging properties

The higher the kVp the ____

The ability to send images to local network stations can be accomplished using

Early reconstruction of raw CT data took a few ___ to form a recognizable image

The first full scale PACS was installed in 1993 in

X-ray energy related to indirect capture DR will stimulate a —- which eventually is changed to electrical signal

A wrap around image/ image aliasing occurs when

Invention of CT is heralded as

A look up table maps

Telegraphy incorporated ____ to produce radiographic images

Loss of detail in the digitally processed image

With PSP image capture to release the latent image which of the following devices is scanned over the Phosphorplate