Chapter 3 Assignment Flashcards
A high SNR will produce what type of spatial resolution on an image?
a.) high
b.) low
a.) high
A large matrix will offer what type of spatial resolution?
a.) greater
b.) less
a.) greater
If an imaging system operated with a DQE of 1, patient dose may potentially be:
a.) increased
b.) reduced
b.) reduced
If the bit depth of a magnetic resonance imaging scanner is 14 bits, how many gray shades can be present in the image?
a.) 2048
b.) 4096
c.) 8192
d.) 16384
d.) 16384
What unit is spatial resolution measured in?
lp/mm
Which of the following describes the type of contrast that is caused by variations in the tissue density within the anatomic part to be imaged?
a.) image contrast
b.) inherent contrast
c.) subject contrast
d.) none of the answers are correct
c.) subject contrast
The window level setting in a digital imaging system is used to manupulate which of the following values?
a.) temporal resolution
b.) image brightness
c.) image contrast
d.) spatial resolution
b.) image brightness
The window width setting in a digital imaging system is used to manipulate which of the following values?
a.) image brightness
b.) temporal resolution
c.) image contrast
d.) spatial resolution
c.) image contrast
Which of the following does not affect patient dose during diagnostic radiography?
a.) inherent filtration
b.) added filtration
c.) source to image distance
d.) focal spot size
d.) focal spot size
Which of the following is known as low contrast resolution?
a.) contrast resolution
b.) spatial resolution
c.) matrix resolution
d.) none of the above
a.) contrast resolution
An artifact thats created by too few xray photons striking the IR is termed:
noise/quantam mottle
Which of the following modalities generally displays the greatest spatial resolution?
a.) computed radiography
b.) nuclear medicine
c.) digital radiography
d.) digital mammography
d.) digital mammography
Which of the following terms best describes the ability of an imaging system to create seperate images of closely spaced high contrast objects?
a.) spatial resolution
b.) contrast resolution
c.) screen speed
d.) quantam mottle
a.) spatial resolution
Which of the following best describes the ability of an imaging system to tell structures with similar thickness or density apart?
a.) spatial resolution
b.) contrast resolution
c.) temporal resolution
d.) inherent resolution
b.) contrast resolution
Which of the following is known as high contrast resolution?
a.) spatial resolition
b.) contrast resolution
c.) temporal resolution
d.) inherent resolution
a.) spatial resolution
Which of the following is known as low contrast resolution?
a.) contrast resolution
b.) spatial resolution
c.) matrix resolution
d.) none of the above
a.) contrast resolution
This type of contrast is dependent on what the system is capable of (film screen, digital, etc…)
a.) contrast resolution
b.) image contrast
c.) inherent contrast
d.) subject contrast
c.) inherent contrast
Which term describes the range of exposure over which a detector can acquire data?
a.) LUT
b.) dynamic range
c.) rescaling
d.) DQE
b.) dynamic range
Which of the following is part of a systems software that adjust the image to the desired contrast?
a.) LUT
b.) dynamic range
c.) rescaling
d.) DQE
a.) LUT
A patient scheduled for a left foot amputation accidentally receives a rhinectomy. This scenario is an example of:
a.) adverse event indicator
b.) sentinel event indicator
c.) risk indicator
d.) an “I found it like that” indicator
b.) sentinel event indicator
While performing a routine arthrogram a surgeon accidentally perforates a vessel. This scenario is an example of what:
a.) adverse event indicator
b.) sentinel event indicator
c.) risk indicator
d.) an I found it like that indicator
a.) adverse event indicator
A patient recieved injected contrast media and had a severe reaction resulting in death.
a.) adverse event indicator
b.) sentinel event indicator
c.) risk indicator
d.) an i found it like that indicator
b.) sentinel event indicator
While performing a routine l spine xray the tech gives the customary request blow all your breath out and hold but the patient mistakenly hears roll all the way on your stomach which results in the patient falling to the floor.
a.) adverse event indicator
b.) senteinel event indicator
c.) risk indicator
d.) an i found it like that indicator
a.) adverse event indicator
A generator that produces 100% ripple is most efficent type of generator used in diagnostic imaging.
a.) true
b.) false
b.) false
