Table 3 Average relative distribution (%) of the radiotracer, as determined on SPECT-CT images by manual segmentation and AutoLung3D, for the 21 patients with emphysema
From: Clinical validation of an AI-based automatic quantification tool for lung lobes in SPECT/CT
Quantification method | Right lung lobe values | Left lung lobe values | Total lung values | ||||
|---|---|---|---|---|---|---|---|
Superior lobe | Middle lobe | Inferior lobe | Superior lobe | Inferior lobe | Right lung | Left lung | |
Ventilation SPECT AutoLung3D | 17.7 | 9.2 | 25.5 | 22.7 | 24.9 | 52.4 | 47.6 |
Ventilation SPECT manual segmentation | 20.3 | 8.3 | 23.8 | 26.3 | 21.2 | 52.4 | 47.6 |
Error (%) on ventilation distribution | − 2.6 | + 0.9 | + 1.7 | − 3.6 | − 3.7 | 0 | 0 |
Perfusion SPECT AutoLung3D | 21.1 | 8.3 | 22.1 | 26.6 | 21.8 | 51.5 | 48.5 |
Perfusion SPECT manual segmentation | 24.1 | 7.3 | 20.7 | 29.3 | 18.6 | 52.1 | 47.9 |
Error (%) on perfusion distribution | − 3.0 | + 1.0 | + 1.4 | − 2.7 | + 3.3 | − 0.6 | + 0.6 |