Table 2.
Time course of computed tomography lymphography for the detection of SN after injection of contrast agent
| Case number | Time course | Time to the first appearance of SN (min) | Time to greatest nodal enhancement (min) and HU at that time | |||
|---|---|---|---|---|---|---|
| 1 min | 3 min | 5 min | 10 min | |||
| 1 | NE | − | − | + | 10 | 10 (46.3 HU) |
| 2 | − | + | + | + | 3 | 10 (88.0 HU) |
| 3 | NE | + | + | − | 3 | 3 (77.2 HU) |
| 4 | NE | − | + | + | 5 | 10 (85.6HU) |
| 5 | + | + | + | + | 1 | 1 (126.1HU) |
| 6 | − | − | − | − | – | – |
| 7 | + | + | + | + | 1 | 1 (92.0HU) |
| 8 | − | − | − | − | – | – |
| 9 | + | + | + | + | 1 | 3 (133.5HU) |
| 10 | − | + | + | + | 3 | 3 (273.4HU) |
| 11 | − | + | + | + | 3 | 3 (100.0HU) |
| 12 | + | + | + | + | 1 | 5 (86.2HU) |
| 13 | + | + | + | + | 1 | 1 (102.8HU) |
| 14 | − | − | − | − | – | – |
| 15 | + | + | + | + | 1 | 3 (723.0HU) |
| 16 | + | + | + | + | 1 | 3 (78.2HU) |
| 17 | + | + | + | + | 1 | 1 (101.3HU)) |
| 18 | − | − | − | − | – | – |
| 19 | + | + | + | + | 1 | 5 (69.6HU)) |
| 20 | − | + | + | + | 3 | 3 (361.2HU) |
| 21 | − | + | + | + | 1 | 5 (199.7HU) |
| 22 | + | + | + | + | 1 | 10 (210.5HU) |
| 23 | − | − | + | + | 3 | 10 (157.9HU) |
| 24 | + | + | + | + | 1 | 1 (140.0HU) |
| Detection rate | 11/21 (52.4%) | 17/24 (70.8%) | 19/24 (79.2%) | 19/24 (79.2%) | ||
HU, Hounsfield units; NE, not examined; SN, sentinel node.