scan field
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22 Terms
T/F: Technologist selects the SFOV size appropriate to the examination
t
SFOV is xregion
circular
•SFOV determines the number of x collecting data
detector cells
where is raw data acquired
scan field of view
why is it important in terms of SFOV, for placement of the patient
isocenter, because that is where scan data is acquired
when do we use small FOV
+ size
head 25 cm
when do we use medium FOV + size
chest 35 cm
when do we use large FOV + size
abdominal 42-50 cm
DFOV
display field of view
gantry openinng size
77 cm
what do NOT think of DFOV
magnification
DFOV can be referred to as x
“reconstruction FOV”
what does the DFOV determine
•Determines how much (diameter in mm or cm) of the scanned raw data is used to create a new set of images with only the desired anatomy being included
x is used to optimize the DFOV for the new images
Localizer scan
what is orange
SFOV
what is blue
DFOV
DFOV x be larger than SFOV
can not SFOV because the data selected for the DFOV are a subsection of all available scan data
what is green
DFOV
what is the green line in top
SFOV
pick the correct SFOV because…
reduce patient dose