Overview
| Air |
-1000 HU |
| Adipose tissue (fat) |
-200 to -50 HU |
| Water |
0 HU |
| Soft tissue |
+40 HU |
| Blood (non contrast) |
+40 to +80 HU |
| Nephroliths (kidney stones) |
+100 to +400 HU |
| Bone |
+1000 to +3000 HU |
By organ
| Lung |
-900 to -150 HU |
| Breast tissue |
-100 to -50 HU |
| Adrenal gland |
+10 to +30 HU |
| Intestine |
+10 to +30 HU |
| Pancreas |
+10 to +40 HU |
| Bladder |
+20 to +40 HU |
| Heart muscle |
+20 to +50 HU |
| Tumor |
+20 to +60 HU |
| Liver |
+20 to +60 HU |
| Kidney |
+30 to +50 HU |
| Spleen |
+40 to +50 HU |
Note: all of these figures are approximate. Depending on the CT machine and patient, the values might be just below or above the range provided.