Iatrogenic Brain and Cervical Cord Magnetic Resonance Imaging Susceptibility Artifacts From Metallic Microemboli

Roshal, David; Snapp, Meredith; Friedman, David P.; Zangaladze, Andro

doi:10.1001/archneurol.2010.336

Cited by 3 publications

(5 citation statements)

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“…Cerebral MR imaging findings suggesting embolic metal fragments are rare, and only 4 cases have been reported (Table 3). [7][8][9][10] In addition to a mechanical prosthetic cardiac valve and robotic surgery, angiographic guidewires used during cardiac catheterization were suspected as an embolic source in 2 cases. 9,10 To the best of our knowledge, this cases series is the first in reporting MR imaging metallic signal following neuroendovascular treatment of intracranial aneurysms.…”

Section: Discussionmentioning

confidence: 99%

“…[7][8][9][10] In addition to a mechanical prosthetic cardiac valve and robotic surgery, angiographic guidewires used during cardiac catheterization were suspected as an embolic source in 2 cases. 9,10 To the best of our knowledge, this cases series is the first in reporting MR imaging metallic signal following neuroendovascular treatment of intracranial aneurysms. Besides the guidewires, various devices (ie, coils, balloons, and stents) composed of metal are used in neuroendovascular procedures, which can provide more frequent opportunities for metallic embolism compared with cardiac catheterization.…”

Section: Discussionmentioning

confidence: 99%

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Suspected Metallic Embolism following Endovascular Treatment of Intracranial Aneurysms

Yasuda

Maeda

Umino

et al. 2016

AJNR Am J Neuroradiol

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SUMMARY:We describe a case series of suspected metallic embolism after coil embolization for intracranial aneurysms. Between January 2012 and December 2014, 110 intracranial aneurysms had been treated by coil embolization in our institution. In 6 cases, the postprocedural MR imaging revealed abnormal spotty lesions not detected on the preprocedural MR imaging. The lesions were also undetectable on the postprocedural CT scan. They were demonstrated as low-intensity spots on T1WI, T2WI, DWI, and T2*-weighted imaging. On DWI, they were accompanied by bright "halo," and on T2*-weighted imaging, they showed a "blooming" effect. In 3 of the 6 cases, follow-up MR imaging was available and all the lesions remained and demonstrated no signal changes. Although histologic examination had not been performed, these neuroradiologic findings strongly supported the lesions being from metallic fragments. No specific responsible device was detected after reviewing all the devices used for the neuroendovascular treatment in the 6 cases.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Suspected Metallic Embolism following Endovascular Treatment of Intracranial Aneurysms

Yasuda

Maeda

Umino

et al. 2016

AJNR Am J Neuroradiol

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confidence: 99%

“…

Brain embolic metallic microfragments are reported as a very rare consequence of mechanical prosthetic heart valve implantation or angiographic procedures using stainless steel guide wires. [1][2][3][4][5] Extremely small metallic microemboli, as small as 0.01 mg 1 , are not visible on computerised tomography (CT) but can be easily detected by magnetic resonance imaging (MRI) because of their strong local field inhomogeneity causing striking ferromagnetic susceptibility artefacts.We report a case of a presumed embolic brain metallic fragment detected in a fetus by fetal MRI and confirmed by postnatal brain MR.A 29-year-old pregnant woman, gravida 3, was referred at 23 weeks' gestation because of red cell alloimmunization. A detailed ultrasound (US) examination was performed with a multiplanar approach, and no brain abnormalities were observed.

…”

mentioning

confidence: 99%

“…Brain embolic metallic microfragments are reported as a very rare consequence of mechanical prosthetic heart valve implantation or angiographic procedures using stainless steel guide wires. [1][2][3][4][5] Extremely small metallic microemboli, as small as 0.01 mg 1 , are not visible on computerised tomography (CT) but can be easily detected by magnetic resonance imaging (MRI) because of their strong local field inhomogeneity causing striking ferromagnetic susceptibility artefacts.…”

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confidence: 99%

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