Final review

compton scatter is directed at ____ angle from the incident beam

computed radiography and screen-film imaging both have a(n)

the laser is one of the ____ features of the computed radiography reader

if the quantity of electrons hitting the target are doubled, the x-ray quantity is

the computed radiography reader is made up of ____

a high quality radiograph should always demonstrate

Reregistering an image to correct for patient motion is done with?

Lossless compression reduces data files ____

which medical condition may require a lower technique?

The quantity of brems radiation increases proportionally with increased?

An exposure taken at 100 kVp would have a continuous emission spectrum with a max energy of

Which is done to the image during preprocessing?

compton contributes to

If filter thickness is ____, then X-ray intensity is ____.

the three primary factors influencing the intensity of scatter in the image forming beam are

electron interactions at the inner shell of the target atoms produce___ radiation

Each anatomical part has an image histogram w a(n) shape?

A graph frequency of occurrence versus digital value intervals is called?

The efficiency of X-ray production is ____ the tube current

The national standard for image transmission in tele radiology is the

Which modality produces the largest image files?

Image file size is determined by _____ size and gray scale

when only the optical density needs to be changed, only the ____ should be adjusted

CR cassettes and film screen cassettes can be used interchangeably with any xray imaging system

which xray interaction involves the ejection of the k shell electron

projectile electrons travel from

the xray interaction that contributes to the clear parts of the image is____

Object artifacts in digital imaging can occur from errors in ____

a radiograph with a long scale of contrast will have ___ latitude and __ contrast

____ is corrected by the application of an offset voltage

The production of heat at the anode is directly proportional to______

if mas in increased from 20 to 40 the patient does will

the HVL is lowered by a decrease in

the four steps of creating an image with computed radiography are

Europium is the ___ of the photostimulable phosphor

when were x-rays discovered KYLE?

photoelectric interactions increase when ____ is decreased

X-ray quantity increases in direct proportion to increase in?

the computesd radiology screens respond to radiation with

only at energies above 10 mev can ____ take place

decreasing kvp will increase

digital radiography was first introduced in

Preprocessing the digital image is done___ and post-processing is done _____?

the scattered xray from a compton interaction usually retains___ of the energy of the incident

beam penetrability is increased if ____ is increased

PACS stands for?

the most commonly used beam restricting device is the ____

the use of compression device will increase ______

the digital imaging plate can sit for some time after the erase cycle (longer than 48 hrs)

Within a PACS network the secretarial workstation and the viewing workstation are called?

What size is the average CR or DR image file?

Software correction that equalizes response of each pixel to uniform exposure is?

A 10% increase in kVp has ____ effect on X-ray intensity than/as a 10% increase in mAs

An increase in 15% kVp is equivalent to increasing mAs _____

grays in air are the measurement for xray

Which is not a part of PACS?

At 55 kVp, _____ of the xrays produced are bremsstrahlung.

Flatfielding is accomplished through automatic calibration images called _______ and_______.

The size and number of digital images has to be compressed to permit

the small focal spot will provide

a photostimulable phosphor in a metastable state will emit light

____ is done during preprocessing to correct for an irregular pattern over the image

X-ray beam QUALITY is improved by

the use of ____ improves contrast and lowers patient dose

Lowering kvp ___ patient dose and ___ image contrast

a ____% increase in kvp has the same effect on optical density as doubling the mas

A computation of the mean pixel value within a region of interest is performed for?

xray intensity is proportional to

what two preprocessing techniques are combined for flatfielding?

The three classifications of digital imaging artifacts are

During preprocessing the digital output of the IR May need to be manipulated to correct?

A ghost image can occur in digital imaging because of _____

K-shell binding energy increases with increasing _____

at least a ____% change in mas is necessary to produce a visible change in optical density

the efficiency of xray production increases as ___ increases

Histogram selection is done

changes in kvp effect

attenuation is caused by

Creating distinct collimated margins on all 4 sides of a DR image is important in preventing?

at 68 kvp ____ of the xrays produced are brems?