Table 2 Intraoperative freehandSPECT findings
Acquisition time (s) | % VOI scanned | Reconstruction time (s) | No. of SNs on freehandSPECT/total no. of SNs preoperative imaging (%) | No. of SNs located with navigation/no. of SNs seen on freehandSPECT (%) | Error of navigation per SN (mm) | Note | |
|---|---|---|---|---|---|---|---|
1 | 85 | 66.3 | 31 | 3/4 (75) | 3/3 (75) | 7, 8, 4 | SN in parotid gland not visible on freehandSPECT |
2 | 100 | 78 | n.n. | 3/3 (100) | 3/3 (100) | 9, 9, 9 | Level V cluster of 2 |
3 | 121 | 67.6 | 87 | 1/1 (100) | 1/1 (100) | 5 | – |
4 | 126 | 51.5 | 211 | 1/1(100) | 1/1 (100) | 2 | – |
5 | 94 | 71 | 31 | 1/1(100) | 1/1 (100) | 5 | – |
6 | 74 | 59 | 89 | 1/1 (100) | 0/1 (0) | – | SN part of IS, navigation not possible; level II SN cluster of 3 |
7 | 132 | 82 | 135 | 2/2 (100) | 2/2 (100) | 0, 5 | Level II cluster of 2 |
8 | 199 | 80.4 | 90 | 2/2 (100) | 2/2 (100) | 7, 5 | – |
Average | 116.4 | 69.5 | 96.3 | 5.8 | |||
Total | 14/15 (93.3) | 13/14 (92.9) |