Average Hounsfield units (HU)
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HU for blood (old)
+10 to +15
HU for bone
+150 to +1000
HU for brain
+20 to +40
HU for blood (fluid)
+20 to +50
HU for metal
+2000 to +4000
HU for tumor
+25 to +100
HU for aorta
+35 to +50
HU for muscle
+35 to +50
HU for liver
+40 to +70
HU for gallbladder
+5 to +30
HU for blood (clotted)
+50 to +75
HU for fat
-100
HU for air
-1000
HU for orbit
-25
HU for lungs
-250 to -850
HU for cyst
-5 to +10
HU for water
0
HU for fluid
0 to +25
