Table 4.
Mean, median and standard deviation of time spent per recorded case by H&N anatomy experts for OAR segmentation and related revisions, broken down per cohort subset.
| MDA carotid time (min.) | MDA other OAR time (hr.) | Physician time (hr.) | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Cohort | NCases | NSamples | mean | median | σ | NSamples | mean | median | σ | NSamples | mean | median | σ |
| 1 | 251 | 28 | 27.7 | 27.5 | 6.6 | 63 | 6.9 | 6.00 | 2.9 | - | - | - | - |
| 2 | 105 | 39 | 24.1 | 20.0 | 9.2 | 72 | 7.1 | 7.00 | 0.6 | - | - | - | - |
| 3 | 99 | 74 | 35.3 | 35.0 | 8.7 | 77 | 7.4 | 7.50 | 0.6 | - | - | - | - |
| Hold Out | 35 | - | - | - | - | 35 | 6.6 | 6.75 | 0.8 | 34 | 4.0 | 4.25 | 1.6 |
| Combined | 490 | 141 | 30.7 | 30.0 | 9.8 | 247 | 7.1 | 7.00 | 1.6 | 34 | 4.0 | 4.25 | 1.6 |
MDA time spent on carotid segmentation was recorded to the nearest 5 minutes; time spent by MDAs on other OARs, as well as physician time, was recorded to the nearest 15 minutes. MDA effort can be considered as interchangeable with dosimetrist effort.