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Complex congenital heart malformation evaluated with MR imaging at 0.3 T
N Malmgren1, P Hochbergs, C Holmqvist
1Department of Radiology, University Hospital, Lund, Sweden.
Insights
This study shows Magnetic Resonance (MR) imaging at 0.3 Tesla is effective for diagnosing complex congenital heart disease (CHD). It accurately identifies anomalous vessels and their connections, proving valuable in pediatric radiology.
Area of Science:
- Radiology
- Cardiovascular Imaging
- Pediatric Cardiology
Background:
- Congenital heart disease (CHD) presents complex diagnostic challenges.
- Accurate imaging is crucial for effective treatment planning in pediatric patients.
Purpose of the Study:
- To assess the diagnostic efficiency of 0.3 Tesla (T) Magnetic Resonance (MR) imaging as a standalone tool for complex CHD.
- To specifically evaluate its performance in identifying anomalous venous return and vessel connections.
Main Methods:
- Retrospective review of 45 congenital heart disease cases by pediatric radiology specialists.
- Two-stage review process: general CHD diagnosis followed by detailed anomalous venous return analysis.
- Independent assessment by multiple radiologists to ensure objectivity.
Main Results:
- High overall accuracy (92%) for general cardiovascular anomaly diagnosis using 0.3 T MR imaging.
- Excellent sensitivity (80%) and specificity (96%) for detecting complex CHD.
- Good sensitivity (85%) for anomalous veins, with slightly lower rates (79%) for identifying their specific connection sites.
- High specificity (97%) for all findings related to anomalous vessels.
Conclusions:
- 0.3 T MR imaging is a valuable single modality for diagnosing complex congenital heart disease.
- It demonstrates particular strength in identifying anomalous vessels and their anatomical connections.
- The findings support the use of low-field MR imaging in pediatric CHD assessment.
Abstract:
The aim of this study was to evaluate the efficiency of MR imaging at 0.3 T as the single modality in diagnosing complex congenital heart disease (CHD). Films from 45 cases were reviewed in two stages by four specialists and one fellow in pediatric radiology, who were unfamiliar with the patients. First a general review of CHD diagnosis was made, then a detailed study of anomalous venous return was performed. Regarding the general diagnosis of cardiovascular anomalies the results were good, with sensitivity of 80%, specificity of 96%, a positive predictive value of 88%, a negative predictive value of 93% and accuracy of 92%. As expected, the less experienced reviewer had somewhat lower figures. As for detailed evaluation of the anomalous veins, the diagnostic results were again good (sensitivity 85%), although less so when also the connection sites of the anomalous veins were considered (sensitivity 79%). The specificity of the findings was high at 97%. MR imaging at 0.3 T is valuable in the diagnosis of complex CHD, especially for anomalous vessels and their connections.