RADIOLOGY PHYSICS COMPREHENSIVE EXAM 2026/2027
QUESTIONS AND SOLUTIONS RATED A+
✔✔which would creat the most amount of scatter?
a 4x4
b 12x17
c 10x12 - ✔✔14x17
its the largest
✔✔which has greater attenuation? (meaning absorption)
bone vs water
fat vs water
muscle vs water
ice vs water - ✔✔bone
water
muscle
water
✔✔which is has more radiographic density? (more see through)
normal bone vs osteoporotic bone
normal lung vs pneumonia
magenblass vs soft tissue
fat vs soft tissue
5:1 grid vs 10:1 grid - ✔✔osteo
nl lung
magenblass
fat
5:1
✔✔increasing kVp will result in ___
a increased scatter
b decreased scater - ✔✔increased scatter
✔✔increasing kVp will result in ___
more pt dose
less pt dose - ✔✔less pt dose via decreasing mAS
✔✔AP thoracic part of the tube towards the pt head
a cathode
b anode - ✔✔anode
✔✔which would result in the highest RD
a 55 kVp 100 mAS
b 65 kVp 500 mAS
, c 85 kVp 25 mAS - ✔✔highest kVp with lowest mAS
85 and 25
the other 2 are equal
✔✔ If you change the number of protons - ✔✔you change the element
✔✔Isotope vs Ion - ✔✔iso = change the # of neutrons
ion = change the # of electrons
✔✔types of energy - ✔✔mechanical
potential
kinetic
chemical
thermal
electrical
nuclear
✔✔binding energy - ✔✔energy that holds electrons in their orbit
✔✔centripetal energy - ✔✔energy that moving electrons possess in their orbit
✔✔how are binding energy and centripetal energy related - ✔✔inversely related
✔✔equation for velocit - ✔✔frequency x wavelength
✔✔X-ray properties - ✔✔-highly penetrating
-invisible
-electrically neutral
-travels in a straight line at the speed of light
-can cause ionization in matter
-causes fluorescence
-cannot be focused by a lens
-affects photographic film
-produces change in matter and causes scatter
✔✔radiolucent - ✔✔radiation can go though the object
Lucent = black area on film
✔✔radiopaque - ✔✔radiation can not go though the object
opaque = white, clear area
✔✔x-ray machine parts - ✔✔anode +
cathode -
tungsten - releases electrons easy, #74
filament
QUESTIONS AND SOLUTIONS RATED A+
✔✔which would creat the most amount of scatter?
a 4x4
b 12x17
c 10x12 - ✔✔14x17
its the largest
✔✔which has greater attenuation? (meaning absorption)
bone vs water
fat vs water
muscle vs water
ice vs water - ✔✔bone
water
muscle
water
✔✔which is has more radiographic density? (more see through)
normal bone vs osteoporotic bone
normal lung vs pneumonia
magenblass vs soft tissue
fat vs soft tissue
5:1 grid vs 10:1 grid - ✔✔osteo
nl lung
magenblass
fat
5:1
✔✔increasing kVp will result in ___
a increased scatter
b decreased scater - ✔✔increased scatter
✔✔increasing kVp will result in ___
more pt dose
less pt dose - ✔✔less pt dose via decreasing mAS
✔✔AP thoracic part of the tube towards the pt head
a cathode
b anode - ✔✔anode
✔✔which would result in the highest RD
a 55 kVp 100 mAS
b 65 kVp 500 mAS
, c 85 kVp 25 mAS - ✔✔highest kVp with lowest mAS
85 and 25
the other 2 are equal
✔✔ If you change the number of protons - ✔✔you change the element
✔✔Isotope vs Ion - ✔✔iso = change the # of neutrons
ion = change the # of electrons
✔✔types of energy - ✔✔mechanical
potential
kinetic
chemical
thermal
electrical
nuclear
✔✔binding energy - ✔✔energy that holds electrons in their orbit
✔✔centripetal energy - ✔✔energy that moving electrons possess in their orbit
✔✔how are binding energy and centripetal energy related - ✔✔inversely related
✔✔equation for velocit - ✔✔frequency x wavelength
✔✔X-ray properties - ✔✔-highly penetrating
-invisible
-electrically neutral
-travels in a straight line at the speed of light
-can cause ionization in matter
-causes fluorescence
-cannot be focused by a lens
-affects photographic film
-produces change in matter and causes scatter
✔✔radiolucent - ✔✔radiation can go though the object
Lucent = black area on film
✔✔radiopaque - ✔✔radiation can not go though the object
opaque = white, clear area
✔✔x-ray machine parts - ✔✔anode +
cathode -
tungsten - releases electrons easy, #74
filament
