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Intro to Rad Chp 7

Effects to Density, Contrast, Etc

QuestionAnswer
What is the controlling factor of density? mAs
What is the controlling factor of contrast? kVp
Changing these will have what effect on density? mAs, kVp, speed factors, temp of processing chemicals, chemical fog, silver directly proportional, so increasing these will increase density & decreasing will decrease density
Changes to these factors will have what effect on density? grid ration, thickness of body part, collimation, SID, contrast, OID and filter thickness inversely proportional, increasing these will DECREASE density, etc
What effect does FSS have on density? no effect
Fat, muscle, and air equate to _____ density than bone or contrast media. more
Thin patients have ____ density on an image. more
Changing these factors will do what to contrast? collimation, grid ration, screen speed, tube filtration, processing time/temp (2 sec/2deg), OID directly proportional
CHanging these factors will have what effect on contrast? kVp, processing time/temp(more than 2sec/2/deg ), and speed of film inversely proportional
Abdomen/chest and breast will have what effect on contrast? decrease contrast, these location have very low contrast
Smaller parts have higher or lower contrast? higher
What effect do these factors have on contrast? mAs, ma, time,FSS, SID No effect
Created by: erikasmith28