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Published on: March 8, 2013
MR Lymphangiography in Children: Technique and Potential Applications
Govind B Chavhan1, Joao G Amaral1, Michael Temple1
1From the Department of Diagnostic Imaging (G.B.C., J.G.A., M.T.) and Division of Image Guided Therapy, Department of Diagnostic Imaging (J.G.A., M.T.), The Hospital for Sick Children, Medical Imaging, University of Toronto, 555 University Ave, Toronto, ON, Canada M5G 1X8; and Center for Lymphatic Imaging and Interventions, Children's Hospital of Philadelphia, Hospital of the University of Pennsylvania, Philadelphia, Pa (M.I.).
Dynamic contrast-enhanced (DCE) MR lymphangiography offers a safe and effective method for visualizing the lymphatic system, overcoming limitations of traditional imaging techniques for central conducting lymphatics in children.
Area of Science:
- Medical Imaging
- Lymphatic System Physiology
- Pediatric Radiology
Background:
- The lymphatic system is crucial for circulatory health but challenging to image due to its small size.
- Traditional lymphatic imaging methods have limitations in visualizing central conducting lymphatics (CCLs).
- Previous techniques like fluoroscopic lymphangiography pose risks such as radiation exposure and embolization.
Purpose of the Study:
- To review the evolution of lymphatic system imaging techniques.
- To highlight the advantages and applications of dynamic contrast-enhanced (DCE) magnetic resonance (MR) lymphangiography.
- To discuss the role of DCE MR lymphangiography in pediatric lymphatic disorders.
Main Methods:
- Review of existing literature on lymphatic imaging.
- Description of the DCE MR lymphangiography technique, including contrast material injection into lymph nodes.
- Complementary use of T2-weighted imaging for CCL assessment.
Main Results:
- DCE MR lymphangiography effectively visualizes CCL integrity and abnormalities like blockages or leaks.
- The technique has been successfully applied in pediatric cases of plastic bronchitis, neonatal lymphatic disorders, and chylothorax.
- It aids in identifying the source of chylous ascites and planning interventions for lymphatic malformations.
Conclusions:
- DCE MR lymphangiography is a valuable tool for assessing pediatric lymphatic abnormalities, overcoming limitations of older methods.
- This advanced imaging modality improves the understanding and management of various lymphatic flow disorders.
- It offers a safer alternative to radiation-based techniques for detailed lymphatic system evaluation.
