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J Magn Reson Imaging. 2015 Dec;42(6):1465-77. doi: 10.1002/jmri.24887. Epub 2015 Apr 23.

MR lymphangiography: How i do it.

Author information

1
Department of Radiology, Straub Clinic and Hospital, Honolulu, Hawaii, USA.
2
Department of Radiology, University of Pennsylvania, Philadelphia, Pennsylvania, USA.
3
Department of Radiology, University of Washington, Seattle, Washington, USA.
4
Department of Plastic Surgery, University of Washington, Seattle, Washington, USA.

Abstract

Lymphedema is a chronic progressive edematous disease that in the United States is most commonly related to malignancy and its treatment. Lymphaticovenular anastomosis is a recently introduced microsurgical treatment option for lymphedema that requires the identification and mapping of individual lymphatic channels. While nuclear medicine lymphoscintigraphy has been the primary imaging modality performed to evaluate suspected lymphedema, lymphoscintigraphy does not provide the spatial information necessary for presurgical planning. High-resolution dynamic 3D magnetic resonance imaging (MRI) can noninvasively image abnormal lymphatic channels to both diagnose lymphedema and depict the location and number of individual lymphatic channels for surgical planning. MR lymphangiography can be performed at 1.5T or 3.0T using multichannel phased array surface coils. The main components of the exam are a heavily T2 -weighted 3D sequence to define the severity and extent of edema, a high-resolution dynamic 3D gradient echo imaging after intracutaneous contrast injection to visualize lymphatic channels, and a delayed 3D gradient echo sequence after intravenous contrast to define veins. This article reviews the pathophysiology and microsurgical treatment of lymphedema, presents the imaging protocol used at our institution, and describes exam interpretation and the image postprocessing performed for surgical planning.

KEYWORDS:

MR lymphangiography; breast cancer; image postprocessing; lymphaticovenular anastomosis; lymphedema; microsurgery

PMID:
25906741
DOI:
10.1002/jmri.24887
[Indexed for MEDLINE]

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