Table 3.
Mean (standard deviation) of the magnitude of centroid LE for both individual target registration (GTVP or GTVLN) and simultaneous target registration (collective or averaged). “Collective” registration involved the simultaneous alignment of the GTVP and GTVLN using a single registration, whereas “averaged” registration consisted of separate alignments for each individual target volume, which were then averaged together to obtain the final transform.
| Primary tumor registration (mm) | Lymph node registration (mm) | ||||||
|---|---|---|---|---|---|---|---|
| Registration | Short name | GTVP | Collective | Averaged | GTVLN | Collective | Averaged |
| Bony-anatomy | Bony | 7.3 (5.4) | 7.3 (5.7) | 7.3 (5.7) | 5.3 (3.4) | 5.3 (3.4) | 5.3 (3.4) |
| Standard NMI | Standard | 5.8 (6.0) | 6.7 (6.9) | 5.7 (5.5) | 3.2 (2.5) | 4.9 (4.1) | 4.0 (2.7) |
| Seeded NMI | Seeded | 4.3 (2.5) | 6.0 (6.1) | 4.6 (3.1) | 2.8 (1.8) | 5.1 (4.4) | 3.9 (2.3) |
| Intermediate transitive-based | Intermediate-TB | 4.7 (3.7) | 6.3 (7.2) | 4.9 (4.2) | 3.0 (2.0) | 5.7 (5.0) | 3.6 (2.1) |
| Consecutive transitive-based | Consecutive-TB | 4.8 (3.7) | 7.8 (12.3) | 5.1 (3.8) | 3.3 (1.7) | 6.9 (10.7) | 3.8 (2.2) |
| Intermediate rereferenced | Intermediate-RR | 3.2 (3.0) | 5.5 (5.8) | 4.2 (3.3) | 2.6 (2.2) | 5.2 (4.3) | 3.9 (2.5) |
| Consecutive rereferenced | Consecutive-RR | 2.4 (2.1) | 5.0 (5.2) | 3.9 (2.7) | 2.2 (1.4) | 4.9 (3.7) | 3.8 (2.3) |
| Nominal centroid alignment | Centroid | 0.0 (0.0) | 3.3 (2.3) | 3.3 (2.3) | 0.0 (0.0) | 3.3 (2.3) | 3.3 (2.3) |
Note: GTVP: primary gross tumor volume; GTVLN: lymph node gross tumor volume; NMI: normalized mutual information algorithm.