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