Utor Question 31 0/2.5 pts When source image distance (SID) decreases what happe
ID: 1882299 • Letter: U
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Utor Question 31 0/2.5 pts When source image distance (SID) decreases what happens to contrast? 1- Contrast is eliminated 2- Contrast increases 3- Contrast remains the same 4- Contrast decreases Question 32 2.5/2.5 pts What is does NOT determine digital image recorded detail? 1- Gray scale of bit depth 2- Scale of contrast 3- Pixel size 4- Matrix size Question 33 2.5/2.5 pts When an object measures 8 cm and the image measures 12 cm what would percentage of magnification of the object? 1- 45 percent 2- 30 percent 3- 20 percent 4- 50 percent Question 34 0/2.5 pts What has happened to source-to-image receptor distance (SID) since the beginning of radiology? 1- It has decreased 2- It has increased 3- It has been eliminated 4- It has remained the same 1124 Words English (US) MacBook ProExplanation / Answer
31 ) option 3 .SID has no effect on contrast .So decresing SID will not change the contrast .it remains the same.
32) optin 2.a digital image recorded detail is the degree of sharpness and accuracy of the structural lines recorded in image . it includes matrix size , pixel size and grey scale of depth field . even if contrast is poor a detail can exist.
33)percentage of magnification = (image size- object size )/object size *100
=((12-8)/8 )*100
=50
34) SID in Radiology over time i=has increased from 40 to 72 inches. the more SID more the divergence with increased image of anatomy.
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