TABLE 2.
Data for Hounsfield Unit Values Obtained by the Definition AS Plus (Siemens Healthcare) and Volume CT (GE Healthcare) 64-MDCT Scanners for the Nine Anatomic Soft-Tissue Sites Studied
| Scanner, Anatomic Site | No. of Scans | Hounsfield Unit Measurements
|
||||||
|---|---|---|---|---|---|---|---|---|
| Mean | SD | Standard Error | Median | Minimum | Maximum | Interquartile Range | ||
|
| ||||||||
| Definition AS Plus | ||||||||
| Right lobe liver | 45 | 47.5 | 11.8 | 7.8 | 49.0 | 9.6 | 63.2 | 14.5 |
| Spleen | 48 | 37.7 | 7.3 | 1.1 | 38.5 | 11.9 | 49.0 | 8.3 |
| Right renal cortex | 47 | 25.4 | 5.1 | 0.7 | 26.6 | 14.1 | 33.2 | 8.4 |
| Left renal cortex | 44 | 24.5 | 4.1 | 0.6 | 25.2 | 14.1 | 33.1 | 4.4 |
| Right psoas muscle | 47 | 44.4 | 6.1 | 0.9 | 45.3 | 21.9 | 53.7 | 5.0 |
| Left psoas muscle | 47 | 44.0 | 5.7 | 0.8 | 44.6 | 25.7 | 53.1 | 7.1 |
| Midline anterior subcutaneous fat | 47 | −102.9 | 6.7 | 1.0 | −103.7 | −114.1 | −78.9 | 7.3 |
| Right posterolateral flank subcutaneous fat | 48 | −113.4 | 7.0 | 1.0 | −113.3 | −129.9 | −94.6 | 6.4 |
| Left posterolateral flank subcutaneous fat | 48 | −113.1 | 7.5 | 1.1 | −113.1 | −129.4 | −84.2 | 7.1 |
| Volume CT | ||||||||
| Right lobe liver | 45 | 50.4 | 10.7 | 1.6 | 50.6 | 20.0 | 77.2 | 11.5 |
| Spleen | 48 | 44.3 | 4.1 | 1.1 | 44.7 | 34.4 | 50.9 | 6.2 |
| Right renal cortex | 47 | 29.5 | 5.1 | 0.7 | 29.8 | 17.0 | 42.6 | 6.9 |
| Left renal cortex | 44 | 28.3 | 4.4 | 0.7 | 28.9 | 18.1 | 36.0 | 5.2 |
| Right psoas muscle | 47 | 47.7 | 7.3 | 1.1 | 49.2 | 28.5 | 64.2 | 6.3 |
| Left psoas muscle | 47 | 49.4 | 6.8 | 1.0 | 50.6 | 27.9 | 66.6 | 6.4 |
| Midline anterior subcutaneous fat | 47 | −113.4 | 7.9 | 1.2 | −115.0 | −129.7 | −93.5 | 9.8 |
| Right posterolateral flank subcutaneous fat | 48 | −107.4 | 6.7 | 1.0 | −107.8 | −121.0 | −91.1 | 7.5 |
| Left posterolateral flank subcutaneous fat | 48 | −107.0 | 6.7 | 1.0 | −108.5 | −119.2 | −84.4 | 9.5 |
Note—All values have been rounded off to one decimal place.