Spatial Resolution (Detail)
Spatial Resolution (Detail) 2
Detail
Increase/Decrease/Not affect
Increase/Decrease/Not affect
Distortion
Distortion MATH
100
This is the primary unit of measure for recorded detail
What is lp/mm
100
The number of shades of gray of each pixel is determined by the_______________
What is gray scale bit depth?
100
Increasing SID
Increases
100
AKA size distortion
What is magnification?
100
Calculate the magnification factor when the SID is 40 in. and the SOD is 25 in.
What is 1.6?
200
The spatial resolution of a digital imaging system is the ability to resolve and render ________________ objects.
What are small high contrast objects?
200
Increasing the matrix size does this to the pixel size?
What is decreases?
200
Decreasing OID
Increases
200
Reducing magnification does what to detail?
increases
200
Calculate the magnification factor when the SID is 40 in. and the OID is 5 in.
What is 1.14?
300
Digital Imaging resolution is primarily limited by __________
What is pixel size?
300
The best spatial resolution is on the ________ side.
What is anode side?
300
Increasing patient thickness
decreases
300
This is the magnification factor formula.
300
If a projected image measures 3 in. and the magnification factor is 1.1, what is the size of the actual object?
What is 2.7 inches?
400
A series of boxes laid out in rows and columns that gives form to the image
What is a matrix?
400
The area of geometric unsharpness is called this.
What is penumbra?
400
Increasing focal spot size
decreases
400
This happens when the part is angled and not parallel to the IR and not perpendicular to the IR
What is forshortening?
400
If an object is measured as 4 in. in diameter on the image and 4 in. from the film, what is the actual size of the object if the SID is 40 in
What is 3.6 inches?
500
The overall dimension of the image matrix is called the __________
What is the field of view?
500
If an imaging system has a spatial resolution of 5 lp/mm, what is the smallest object it can resolve?
What is 1/10th mm or .1 mm?
500
Increasing filtration
Does not affect
500
This happens when the part and the CR are perpendicular but the IR is at an angle
What is elongation?
500
Calculate the magnification factor when the SID is 72 in. and the OID is 2 in.
What is 1.0?