10-the smaller the focal spot the better the what of the image?
a. Contrast
b. Spatial resolution
C. Signal
d. Noise
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Contrast; Resolution; Noise ... A low contrast image has a smaller difference (i.e. it's more difficult to ... A and 150 under tissue B. The ratio of signals is now 3.6 ( 550/150) and the ... There are several ways to measure spatial resolution. ... Moving an object closer to the focal spot will increase the penumbra ...Explanation:
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