Neurointervention.  2017 Sep;12(2):110-115. 10.5469/neuroint.2017.12.2.110.

Visualization of Soft Tissue Venous Malformations of Head and Neck with 4D Flow Magnetic Resonance Imaging

• Lee JY
• Suh DC

• KMID: 2389503
• DOI: http://doi.org/10.5469/neuroint.2017.12.2.110

Abstract

Evaluation of hemodynamics in venous malformation (VM) in the head and neck area is done by direct puncture venography before alcohol sclerotherapy, but it is difficult due to a variable degree of filling in from the artery and filling out into the draining vein. We present our preliminary experience of 4D MRI to evaluate VM hemodynamics. Four patients with venous malformation in the maxillofacial area underwent both 4D MRI and direct puncture venography before alcohol sclerotherapy. To find out appropriate velocity encoding (VENC) for VM, we applied 5-50 cm/sec VENC. Significant high-flow foci demonstrated by phase changes in magnitude images were compared with lesion types shown on a direct puncture venogram. Detection of flow in VM was possible in magnitude images or phase-difference images when VENC was set to less than 30 cm/sec. Appropriate VENC for VM was regarded as less than 5 cm/sec. High-flow areas in the dilated venous sac demonstrated focal spots or linear band-like areas on phase changes of 4D MRI. Appropriate VENC application was mandatory to detect flow in VM. Flow information on 4D MRI provided flow information in VM which was not detected on a direct puncture venogram in the compartmentalized lesion and thus can make alcohol sclerotherapy safer.

Keyword

Venous malformation; 4D MRI; Sclerotherapy; Direct puncture venogram

MeSH Terms

Arteries
Head*
Hemodynamics
Humans
Magnetic Resonance Imaging*
Neck*
Phlebography
Punctures
Sclerotherapy
Veins

Figure

• 

  Fig. 1 A 17-year-old male (Patient 3) with venous malformation at left masticator space and cheek. (A) T2WI shows high-signal intense venous malformation at the left masticator space and cheek. (B) Magnitude image of phase-difference images obtained by velocity encoding of 30 cm/sec shows a focal phase change in left cheek (arrow). (C) Direct puncture venogram obtained before sclerotherapy shows a dysmorphic lesion pattern and normal-sized venous drainage to the internal jugular vein (type 2).

• 

  Fig. 2 A 35-year-old male (Patient 4) with venous malformation at the left cheek. (A) T2WI and magnitude image shows high signal intense venous malformation at the left cheek (B) The magnitude image of phase-difference images obtained by velocity encoding of 5 cm/sec shows a dark signal intense linear shaped incoming flow within the malformed venous sac (arrow). (C) A direct puncture venogram before sclerotherapy shows spongiform lesion pattern and normal-sized venous drainage to the internal jugular vein (type 2).

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