Summary
This study was designed to assess the diagnostic value of 3D time-of-flight MR-angiography in cerebral cavernomas. In seven patients, nine out of ten cavernomas were removed by microsurgery. While MR-angiography demonstrated well branches of brain arteries adjacent to the lesions, no flow signal in the vascular malformations was observed. On the other hand, there was a high intensity signal induced by methaemoglobin in those three patients with brainstem cavernomas who had experienced a significant bleeding attack seven months prior to admission. It had a spotted appearence in MR-angiography with volumes of the largest spots around 1.8 cm3. It is suggested that this spot signal could be used as a path marker for the surgical approach in brainstem cavernomas.
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Abbreviations
- FISP:
-
Fast Imaging with Steady Precision
- FLASH:
-
Fast Low Angle Shot
- MIP:
-
Maximum Intensity Projection Method
- MRI:
-
Magnetic Resonance Imaging
- MRA:
-
Magnetic Resonance Angiography
- SE:
-
Spin Echo Sequence
- 3D:
-
Three dimensional
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Wowra, B., Layer, G., Schad, L.R. et al. Three-dimensional time-of-flight MR-angiography and the surgical indication in brainstem cavernomas. Acta neurochir 112, 77–82 (1991). https://doi.org/10.1007/BF01405130
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DOI: https://doi.org/10.1007/BF01405130