Mara M Barth

Beth Israel Deaconess Medical Center, Boston, Massachusetts, United States

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Publications (2)5.01 Total impact

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    ABSTRACT: Arteriovenous fistula (AVF) is a rare but well-documented complication of pancreatic allotransplantation. Small, tortuous vessels in the head of the transplanted pancreas may complicate transarterial embolization. The authors recently encountered two women who developed clinical pancreatitis after right pelvic transplant placement with documented AVF in the head of the transplanted pancreas. In the first patient, embolization was successfully performed transarterially. In the second patient, transarterial embolization was not feasible due to the small caliber and extreme tortuosity of the pancreaticoduodenal arcade and transvenous embolic occlusion was successfully performed. Both patients recovered with normalization of enzyme levels and pain reduction.
    No preview · Article · Aug 2008 · Journal of vascular and interventional radiology: JVIR
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    ABSTRACT: The development of high-field-strength magnetic resonance (MR) imaging systems has been driven in part by expected improvements in signal-to-noise ratio, contrast-to-noise ratio, spatial-temporal resolution trade-off, and spectral resolution. However, the transition from 1.5- to 3.0-T MR imaging is not straightforward. Compared with body imaging at lower field strength, body imaging at 3.0 T results in altered relaxation times, augmented and new artifacts, changes in chemical shift effects, and a dramatic increase in power deposition, all of which must be accounted for when developing imaging protocols. Inhomogeneities in the static magnetic field and the radiofrequency field at 3.0 T necessitate alterations in the design of coils and other hardware and new approaches to pulse sequence design. Techniques to reduce total body heating are demanded by the physics governing the specific absorption rate. Furthermore, the siting and maintenance of 3.0-T MR imaging systems are complicated by additional safety hazards unique to high-field-strength magnets. These aspects of 3.0-T body imaging represent current challenges and opportunities for radiology practice.
    Preview · Article · Sep 2007 · Radiographics