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Quantitative computerized analysis of stable and growing pure ground glass nodules at the baseline CT scan.
| CT features | Stable pGGN | Growing pGGN |
|---|---|---|
| Mean diameter (mm) | 10 | 12 |
| Mean CT attenuation (HU) | −702 | −620 |
| SD CT attenuation (HU) | 78 | 154 |
| Volume (mm³) | 354 | 522 |
| Mass (mg) | 105 | 198 |
SD, standard deviation; HU, Hounsfield unit; pGGN, pure ground glass nodule.
