Table 3.
CT-based larynx OAR volumes for 44 additional patients with locally advanced head and neck cancer
| p value | |||
|---|---|---|---|
| Organ at risk | Mean ± SD | CT 44 pts –CT 5 pts * | CT 44 pts –MRI 5 pts * |
| Thyroid cartilage, cm3 | 10.2 ± 3.11 | 0.26 | 0.21 |
| Cricoid cartilage, cm3 | 3.83 ± 1.29 | 0.93 | 0.99 |
| Arytenoid cartilages, cm3 | 1.00 ± 0.39 | 0.55 | 0.52 |
| Suprahyoid epiglottis, cm3 | 1.94 ± 0.86 | 0.67 | 0.83 |
| Infrahyoid epiglottis, cm3 | 0.96 ± 0.51 | 0.99 | 0.61 |
| Epiglottis, cm3 | 2.91 ± 1.09 | 0.73 | 0.59 |
| Aryepiglottic folds/false vocal folds, cm3 | 6.11 ± 1.72 | 0.32 | 0.29 |
| Supraglottic larynx, cm3 | 13.87 ± 3.68 | 0.56 | 0.36 |
| Glottic larynx, cm3 | 2.99 ± 0.70 | 0.64 | 0.44 |
| Subglottic larynx, cm3 | 5.55 ± 1.94 | 0.52 | 0.66 |
| Larynx, cm3 | 37.20 ± 9.20 | 0.53 | 0.62 |
Abbreviations: OAR = organ at risk; SD = standard deviation; CT = computed tomography-based volumes; MRI = magnetic resonance imaging-based volumes; pts = patients.
*Comparisons are between volumes obtained from 44 additional patients and five initial patients.