Mean Maximal Diameters (Large-Axis Measurement) and Mean Minimal Diameters (Small-Axis Measurement) of RF-Induced Necrotic Zone as Determined by Different Imaging Procedures
| Imaging procedure | Measurement 1 | Measurement 2 | ||||
|---|---|---|---|---|---|---|
| Maximal diameter (cm) | Minimal diameter (cm) | Maximal diameter (cm) | Minimal diameter (cm) | |||
| US | 3.7 ± 0.7 | 2.5 ± 0.6 | 3.6 ± 0.6 | 2.4 ± 0.4 | ||
| CT | 3.8 ± 0.7 | 2.5 ± 0.5 | 3.8 ± 0.7 | 2.5 ± 0.5 | ||
| MRI | 3.8 ± 0.9 | 2.5 ± 0.6 | 4.1 ± 0.9 | 2.7 ± 0.7 | ||
| PET | 3.4 ± 0.8 | 2.3 ± 0.5 | — | — | ||
| PET/CT | 3.8 ± 0.7 | 2.5 ± 0.3 | — | — | ||
For US, CT, and MRI, measurement 1 represents determination of lesion size in venous phase, and measurement 2 represents lesion size in arterial phase. For PET and PET/CT, only 1 measurement was performed (measurement 1). Measurements are expressed as mean ± SD.