| Parameter | Criteria | 1st measurement | 2nd measurement |
| Pulmonary Group | Contrast agent was injected into the pulmonary artery | Mean value at the hilus of the pulmonary artery | Mean value of the autochthonic back muscles |
| Aortic Group | Contrast agent was injected into the aortic arch | Mean value in the descending aorta | Mean value of the autochthonic back muscles |
| Glenn Group | Contrast agent was injected into the Glenn anastomosis | Mean value within the Glenn anastomosis | Mean value of the autochthonic back muscles |