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characteristics. Dynamic contrast-enhanced CT angiogram studies can provide high-resolution images of the intracranial arteries and veins that match up to the details provided by catheter angiographic studies but without the invasive catheterization of vessels.
![]() Figure 1.1. (continued) G-I. Axial T2: Heterogeneously hypointense mass. J-L. Axial SWI: Marked susceptibility due to calcium. |
![]() Figure 1.2. Pitfall of CT in detecting isodense mass, meningioma. A-C. Axial CT, unenhanced: Midline anterior cranial fossa meningioma is hardly detectable. |
![]() Figure 1.2. (continued) D-E. Axial T2: Homogeneously hypointense meningioma is clearly visible. G-I. Axial T1-postcontrast: Homogeneous and avid enhancement within meningioma. |
![]() Figure 1.5. DSA of meningioma, pre- and post-embolization. A. Axial T2: Heterogeneously isointense dural based right frontal mass. B. Coronal T1-postcontrast: Avid tumor enhancement. |
![]() Figure 1.5. (continued) C. Axial T1-postcontrast: Avid tumor enhancement. D. DSA, right external carotid artery injection (arterial phase): Hypervascular right frontal mass with primary arterial supply from the anterior division of right middle meningeal artery (white arrows), and right superficial temporal artery (red arrow). E. DSA, right external carotid artery injection (delayed venous phase): Hypervascular right frontal tumor with persistent intratumoral contrast staining. F. DSA, right external carotid artery injection (arterial phase, post-embolization): Markedly diminished flow following embolization of the right middle meningeal artery anterior division and right superficial temporal artery using Polyvinyl Alcohol (PVA) particles (355-500 µm) and proximal coil occlusion (black arrow).
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