RT Journal Article
SR Electronic
T1 Black Holes on MR Images of the Brain of Patients with Björk-Shiley Heart Valves: Additional Observation in Three Cases
JF American Journal of Neuroradiology
JO Am. J. Neuroradiol.
FD American Society of Neuroradiology
SP 512
OP 514
VO 24
IS 3
A1 Maarten J. van Gorp
A1 Bas A.J.M. de Mol
A1 Chris J.G. Bakker
A1 Yolanda van der Graaf
A1 Willem P.T.M. Mali
YR 2003
UL http://www.ajnr.org/content/24/3/512.abstract
AB Summary: We report the cases of three patients with Björk-Shiley convexo-concave heart valves with unusual black holes shown on cerebral MR images. For two patients, these findings were associated with fracture of the Björk-Shiley convexo-concave heart valve, and for the third, with worn surfaces on the heart valve. Susceptibility changes shown by MR imaging suggest the possibility that these black holes may be associated with microscopic metallic particles, although, the exact cause of these black holes remains undetermined.