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MR lymphangiography at 3.0 T: correlation with lymphoscintigraphy
Mike Notohamiprodjo1, Mayo Weiss, Ruediger G Baumeister
1Department of Clinical Radiology, Clinic of Nuclear Medicine, University Hospitals Munich, and Institute of Medical Informatics, Biometry and Epidemiology, University of Munich, Campus Grosshadern, Marchioninistrasse 15, 81377 Munich, Germany. mike.notohamiprodjo@med.uni-muenchen.de
Magnetic resonance (MR) lymphangiography and lymphoscintigraphy show concordance in evaluating lymphatic drainage. MR lymphangiography excels in visualizing lymph vessels, while lymphoscintigraphy offers superior depiction of inguinal lymph nodes.
Area of Science:
- Radiology
- Nuclear Medicine
- Medical Imaging
Background:
- Lymphedema diagnosis and management rely on accurate lymphatic system imaging.
- Lymphoscintigraphy is a standard but has limitations in visualizing lymph vessels.
- Magnetic resonance (MR) lymphangiography offers potential for detailed lymphatic imaging.
Purpose of the Study:
- To prospectively compare MR lymphangiography and lymphoscintigraphy in patients with lymphedema.
- To evaluate and compare the pattern and delay of lymphatic drainage between the two techniques.
- To investigate discrepancies and assess the diagnostic performance of each modality.
Main Methods:
- Prospective study of 30 patients with lower extremity lymphedema.
- Examination using 3.0-T MR lymphangiography after gadopentetate dimeglumine injection.
- Correlation of MR findings with lymphoscintigraphy results and clinical presentation.
Main Results:
- Excellent correlation between MR lymphangiography and lymphoscintigraphy for drainage delay (κ=0.93) and pattern (κ=0.84).
- MR lymphangiography demonstrated higher sensitivity for lymph vessel abnormalities (100%) compared to lymphoscintigraphy (79%).
- Lymphoscintigraphy provided clearer depiction of inguinal lymph nodes (100%) versus MR lymphangiography (78%).
Conclusions:
- MR lymphangiography and lymphoscintigraphy show significant concordance in imaging findings.
- MR lymphangiography offers superior visualization of lymph vessels and their abnormalities.
- Lymphoscintigraphy remains advantageous for detailed assessment of inguinal lymph nodes.
