Fig. 5: Time-resolved MRA in the patient shown in Fig. 4. | Communications Medicine

Fig. 5: Time-resolved MRA in the patient shown in Fig. 4.

From: Applying artificial intelligence to cardiac MRI to diagnose congenital heart disease in low-resource settings such as Sub-Saharan Africa

Fig. 5

Time-resolved MRA demonstrated decreased perfusion in the right lung parenchyma (asterisks; a–d), consistent with hypoperfusion, veno-venous collaterals (arrows; a–c), and aortopulmonary collaterals (arrow; d). Flow quantification was performed using phase-contrast CMR and demonstrated restricted flow towards the right pulmonary artery (RPA-to-LPA flow ratio is calculated as 27/73%). Manually drawn planes, illustrated in the planning image, were used to target key sites of systemic and pulmonary venous return and to provide a rapid visual explanation for the clinician. This complex anatomy and suspected vascular complication highlight the challenges in both diagnosis and management, particularly in patients with complex congenital heart disease. CHD congenital heart disease, CMR cardiac magnetic resonance imaging, LPA left pulmonary artery, MRA magnetic resonance angiography, RPA right pulmonary artery.

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