Recorded Detail
What does recorded detail refer to?
Image sharpness
What is distortion?
Misrepresentation of size or shape
What is image evaluation?
Checking if image is diagnostic
What is positioning?
Proper alignment of patient and anatomy
What affects image sharpness?
Recorded detail factors
What is another name for recorded detail?
Spatial resolution
What are the two types of distortion?
Size distortion and shape distortion
What is one thing we check in image evaluation?
Positioning, anatomy, sharpness, distortion, or exposure
What causes elongation?
Caused by improper alignment of the x-ray beam with the object and IR
What causes motion blur?
Patient movement
What is one factor that improves recorded detail?
Small focal spot, long SID, short OID, or no motion
What causes magnification (in reference to OID and SID)?
Increased OID or decreased SID
What happens if an image is non-diagnostic?
It may need to be repeated
What causes foreshortening?
Caused when the object is angled or not parallel to the IR
What is one factor that improves image detail?
Small focal spot, long SID, short OID, no motion
What unit is used to measure recorded detail?
Line pairs per mm (lp/mm)
What is one type of shape distortion?
Elongation or foreshortening
Why is image evaluation important?
Ensures accurate diagnosis and avoids repeats
What is a common result to our images as a result of poor tube/IR/part positioning?
Non-diagnostic images
or distortion
What are artifacts?
Unwanted objects like jewelry or clothing
Why does higher lp/mm mean better detail?
Higher lp/mm means the system can see smaller, closely spaced structures, so the image has better detail
What causes distortion overall?
Misalignment of tube, part, and IR
What is the radiologist unable to do with a non-diagnostic image?
Make an accurate diagnosis
What is the relationship between positioning and distortion?
Poor positioning causes shape distortion
What is the overall goal of radiographic imaging?
Produce a diagnostic image for accurate diagnosis