Imaging of Acute Subarachnoid Hemorrhage with a Fluid-Attenuated Inversion Recovery Sequence in an Animal Model: Comparison with Non–Contrast-Enhanced CT
Richard J. Woodcock Jra,
John Shorta,
Huy M. Doa,
Mary E. Jensena and
David F. Kallmesa
a From the Department of Radiology, Emory University, Atlanta, GA (R.J.W.), Department of Radiology; University of Virginia, Charlottesville, VA (J.S., M.E.J., D.F.K.); and the Department of Radiology, Stanford University, Palo Alto, CA (H.M.D.).
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FIG 1. Brain images in a control animal.
A and B, Sagittal (A) and axial (B) FLAIR MR images (10,000/150/2500 [TR/TE/TI]) show no evidence of increased signal in the subarachnoid space.
C, CT image demonstrates no hyperattenuation to suggest SAH.
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FIG 2. High-volume injection of blood to induce SAH.
A and B, Sagittal (A) and axial (B) FLAIR MR images (10,000/150/2500) show hyperintense signal throughout the subarachnoid space; this finding is consistent with hemorrhage.
C, CT image shows linear areas of increased attenuation (arrows) probably due to SAH
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FIG 3. Low-volume injection of blood to induce SAH.
A and B, Sagittal (A) and axial (B) FLAIR (10,000/150/2500) MR images show hyperintense signal throughout the subarachnoid space, consistent with hemorrhage.
C, CT image shows a linear area of increased attenuation (arrowhead), which may be due to SAH or streak artifact.
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