Lymphatic Imaging Techniques: Evaluation of the Central Lymphatic System.

Area of Science:

• Pediatric radiology
• Lymphatic imaging
• Cardiovascular imaging

Background:

• The central lymphatic system is crucial for fluid balance and immune function.
• Lymphatic flow disorders in children are linked to congenital heart disease and postsurgical complications.
• Conditions like chylothorax and plastic bronchitis necessitate detailed imaging for diagnosis and treatment.

Purpose of the Study:

• To review current imaging techniques for the pediatric central lymphatic system.
• To highlight dynamic contrast-enhanced MR lymphangiography as a reference standard.
• To provide guidance on clinical indications, techniques, and interpretation for broader adoption.

Main Methods:

• Review of traditional and advanced cross-sectional imaging modalities.
• Focus on noninvasive techniques: noncontrast MR lymphangiography, contrast-enhanced ultrasound, CT lymphangiography, and dynamic contrast-enhanced MR lymphangiography.
• Detailed description of dynamic contrast-enhanced MR lymphangiography protocols and interpretation.

Main Results:

• Traditional methods offer limited anatomical and functional detail.
• Advanced noninvasive techniques provide high-resolution visualization of central lymphatics like the thoracic duct.
• Dynamic contrast-enhanced MR lymphangiography is established as the reference standard for anatomical mapping and functional assessment.

Conclusions:

• Advances in cross-sectional imaging have significantly improved the evaluation of pediatric lymphatic disorders.
• Dynamic contrast-enhanced MR lymphangiography is a key modality for diagnosing and planning treatment for these conditions.
• Standardization of techniques and interpretation will enhance reproducibility and clinical utility.