The reliability of the measurements taken in cerebral CT angiography (CCTA) images
| rt VA | lft VA | BA | rt P2 | lft P2 | rt PcomA | lft PcomA | rt ICA | lft ICA | rt A2 | lft A2 | AcomA | rt M1 | lft M1 | rt P1 | lft P1 | rt A1 | lft A1 | |
| TEM error | 0.025 | 0.021 | 0.019 | 0.018 | 0.017 | 0.013 | 0.014 | 0.023 | 0.055 | 0.020 | 0.069 | 0.070 | 0.020 | 0.023 | 0.018 | 0.017 | 0.076 | 0.115 |
| rTem (CV) | 0.982 | 0.767 | 0.644 | 0.793 | 0.697 | 0.708 | 0.909 | 0.533 | 1.305 | 0.751 | 2.783 | 3.623 | 0.684 | 0.805 | 0.842 | 0.755 | 3.732 | 5.825 |
| R reliability | 0.998 | 0.999 | 0.999 | 0.997 | 0.996 | 0.999 | 0.999 | 0.998 | 0.988 | 0.998 | 0.948 | 0.971 | 0.998 | 0.998 | 0.999 | 0.998 | 0.991 | 0.982 |
Reliability, the coefficients of variation (CV) or the relative technical error of cerebral vessel internal diameter measurements (rTEM) and the technical error of measurements (TEM) are presented. Reliability is the correlation among the first measurements and the second measurements taken from the same artery, n = 10.
A1, first segment of ACA; ACA, anterior cerebral artery; AcomA, anterior communicating artery; BA, basilar artery; dia, internal diameter; ICA, cranial component of internal carotid artery; lft, left; M1, first segment of MCA; MCA, middle cerebral artery; P1, first segment of PCA; P2, second segment of PCA; PCA, posterior cerebral artery; PcomA, posterior communicating artery; rt, right; VA, vertebral artery.