Quantitative SPECT/CT Sensitivity and Specificity
| Western blot FRα | ||
| Quantitative assessment | + | − |
| + | 25 | 3 |
| − | 6 | 15 |
Tumor-to-scalp 99mTc-EC20 count ratio threshold of 3.5 was used for presence of folate receptors, and sensitivity and specificity of results were calculated, compared with WBA of FRα in tumor on positive–negative scale. These calculations yielded a sensitivity of 81% and specificity of 83%.