Table 3.
Geometry analysis, Dice similarity coefficient (DSC).
| Group | N | DSC | p |
|---|---|---|---|
| All lesions | 70 | 0.56 ± 0.20 | – |
| Subgroups defined by target volume | |||
| Group A BTVPSMA > GTVCT | 17 | 0.55 ± 0.16 | 0.775 |
|
Group B
BTVPSMA ≤ GTVCT |
53 | 0.56± 0.21 | |
| Subgroups defined by imaging modality | |||
|
Group C
PSMA-SPECT/CT |
56 | 0.55 ± 0.20 | 0.791 |
|
Group D
PSMA-PET/CT |
14 | 0.57 ± 0.20 | |
GTVCT, gross tumor volume on the topometric CT; BTVPSMA, biological target volume on the PSMA isotope-based examination; PSMA, prostate-specific membrane antigen; SPECT, single-photon emission computed tomography.