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Exam2 IP Study Stack

QuestionAnswer
Medical image quality Refers to the fidelity with which the anatomy under investigation is rendered on the image receptor.
Spatial resolution The ability to image small objects that have high subject contrast, such as a bone–soft tissue interface, a breast microcalcification, or a calcified lung nodule.
Contrast resolution The ability to distinguish anatomical structures of similar subject contrast such as liver–spleen and gray matter– white matter.
Noise The random fluctuation of x-ray interaction on the image receptor Quantum mottle: reduced with use of high-mAs, low kVp
Speed Medical image quality rules • Fast image receptors have high noise and low contrast resolution. • Low noise accompanies slow image receptors and high contrast resolution. • Spatial resolution is limited to pixel size.
Magnification: affected by SID and OID
Distortion Unequal magnification of different portions of the same object.
The focal-spot blur is small on the anode side and large on the cathode side of the image receptor.
Motion blur  Patient motion is usually the cause of motion blur.
Effect of scatter radiation on image contrast Reduced image contrast results from Compton scattered x-rays.
Grid Type Parallel
Grid Type Crossed
Grid Type Moving
Grid Type Focused
Grid Type Virtual
Created by: Kamrynnorth
 

 



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