1. Magnetic Resonance Imaging Characteristics of Peripheral Arterial Lesions Relate to the Difficulty of Endovascular Procedures 
Trisha L. Roy, BASc, MD, Andrew D. Dueck, MD, MSc, Graham A. Wright, PhD 
Journal of Vascular Surgery 
Volume 66, Issue 3, Pages e71-e72 (September 2017)
DOI: /j.jvs
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2. Fig 1
Noncalcified hard lesion in the superficial femoral artery. Magnetic resonance images identify a hard occlusive plug in the center of the vessel (purple) that cannot be visualized with X-ray angiography, indicating that it is minimally calcified or noncalcified. There are small channels of patency that cannot be visualized with X-ray angiography because of a more proximal occlusion that does not allow contrast material to fill the superficial femoral artery distally.
Journal of Vascular Surgery  , e71-e72DOI: ( /j.jvs )
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3. Fig 2
The same hard, noncalcified superficial femoral artery lesion as in Fig 1. Magnetic resonance imaging (MRI) identified this lesion as hard (purple) even though it is not calcified. This finding was confirmed intraprocedurally because the lesion was challenging to cross with a guidewire (indicated by wire buckling) or balloon open (indicated by waisting at the hardest cross section of the vessel).
Journal of Vascular Surgery  , e71-e72DOI: ( /j.jvs )
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