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RAD107 exam 2 review

QuestionAnswer
Which medical condition may require a lower technique? emphysema
If mAs is increased from 20 mAs to 40 mAs, the patient dose will _____________. be doubled
An increase in mAs causes ______________ in beam quality and ___________ in beam intensity. no change, an increase
With automatic exposure techniques the exposure is terminated when the optimum _____ is reached. OD (optical density)
When only the intensity needs to be changed, only the _______ should be adjusted. mAs
What are the prime exposure factors? kVp, mAs, SID
At least a _____% change in mAs is necessary to produce a visible change in the image. 30%
A high quality radiographic image should always demonstrate ____________. optimal visibility of anatomical structures
Which body habitus indicates a thin, but healthy appearing patient? hyposthenic
Radiographic technique charts embedded in the operating console are based on hypersthenic patients. false
Patient thickness affects radiographic technique by affecting ____________. mAs and kVp settings
The technologist primarily controls radiographic contrast by varying the __________. kilovoltage
The ability to image small objects that have high subject contrast is known as ________. spatial resolution
The ability to distinguish between and image similar tissues is known as ________. contrast resolution
Reregistering an image to correct for patient motion is done with ________________. pixel shift
Almost all medical flat panel digital display devices are _______________. monochrome liquid crystal displays
The decreasing luminous intensity with increasing distance from the source of light follows _____________________. inverse square law
The ambient light at a digital image workstation should be ______________. near darkness
Flatfielding is accomplished through automatic calibration images called _____________ and _______________. offset images; gain images
Preprocessing the digital image is done _____________, and post-processing is done ______________. automatically; manually
Medical flat panel display devices are identified by the ___________________. number of pixels
The national standard for image transmission in teleradiology is the ____________ format. DICOM
PACS stands for _______________________________________. Picture Archiving and Communication Systems
What system became the standard for PACS in order to receive/read images? DICOM and HL7
The principal components of a PACS are the ________________. image acquisition system, display system, network, and storage system
The process of remote transmission and viewing of medical images is known as ________________. teleradiology
When light arrives at the retina, it is detected by the __________________. rods and cones
Digital radiography is superior to analog radiography because of __________________. image brightness
The special demands of digital imaging are ________________ and _____________. postprocessing; numerical analysis
The interpretation of a digital medical image by a radiologist is a two-step process; _________________ followed by ______________. global impression; visual search
A principal advantage of digital imaging over analog imaging is ____________________. image brightness
Image perception is a scientific term for what we call visual ______________. sensitivity
Photopic vision is used for ______________________. daylight vision
Light incident on the eye must first pass through the _________________. cornea
The TG18-LPV/LPH test is used to evaluate _______________. geometric distortion
Daily quality control testing is done by the medical physicist. (True/False) false
A photometer is a _____________________. luminescence meter
A telescope photometer is used at __________. 1 meter
Medical images are transferred using the ____________ standard. DICOM
Created by: travis686
 

 



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