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Title | Creator | Subject | Description |
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Occipital Hemorrhagic Infarction Secondary to Bacterial Endocarditis-Congruent Homonymous Scotomatous Hemianopic Defect | Samuel Bidot, MD; Amit M. Saindane, MD; Valérie Biousse, MD | Homonymous Visual Field Defect; Occipital Lobe; Hemorrhage; Hematoma; Endocarditis | MRI features of occipital hemorrhage secondary to bacterial endocarditis Figure 1 : Humphrey visual fields showing a congruent homonymous scotomatous hemianopic defect Figure 2 : axial gradient echo T2*w brain MRI Figure 3 : axial T1w and T2w brain MRI Figure 4 : axial postcontrast T1w brain MRI |
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Posterior Cerebral Artery Infarction from Vertebral Artery Dissection | Kristen Hudson, MD; Valérie Biousse, MD | Cerebral Infarction; Vertebral Artery Dissection; Homonymous Hemianopia; Posterior Cerebral Artery Occlusion; MRI; DWI; ADC; MRA | Right posterior cerebral artery ischemic infarction due to post traumatic (martial arts) left vertebral artery dissection with resulting right PCA occlusion. Left homonymous hemianopia due to right occipital lobe infarction and left hemisensory loss due to right thalamic infarction. Imaging of the a... |
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Artifact from Incomplete Orbital Fat Suppression on Magnetic Resonance Imaging | Matthew Boyko, MD; Valérie Biousse, MD | Magnetic Resonance Imaging; T1; Fat Suppression | Orbital fat has short relaxation times that results in a hyperintense appearance on T1-weighted magnetic resonance imaging (MRI). Fat suppressed T1 MRI sequences are needed to remove the fat signal and better visualize the orbital anatomy, including the optic nerve. Contrast can be used with fat sup... |
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Radiologic Appearance of Unilateral Sphenoid Wing Hypoplasia in Neurofibromatosis Type I | Samuel Bidot, MD; Amit M. Saindane, MD; Valérie Biousse, MD | Sphenoid Bone; Hypoplasia; Neurofibromatosis; Pulsatile Proptosis | MRI features of greater wing sphenoid hypoplasia in the setting of neurofibromatosis type 1. - Figure 1 : Orbital MRI with contrast showing right greater sphenoid wing hypoplasia. The lack of bone tissue leads to herniation of the right temporal lobe into the orbit, pushing forward the orbital conte... |
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Choroidal Infarction in Giant Cell Arteritis | Wael A. Alsakran, MD; Andre Aung, MD; Valérie Biousse, MD | Giant Cell Arteritis; Ancillary Testing | An 80-year-old Caucasian woman presented with a 10-day history of headaches, intermittent binocular diplopia, and jaw pain. Temporal artery biopsy confirmed a diagnosis of giant cell arteritis. Examination showed characteristic large area of choroidal ischemia that is well-known to be associated wit... |
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MRI Findings in Giant Cell Arteritis | Wael A. Alsakran, MD; Andre Aung, MD; Valérie Biousse, MD | Giant Cell Arteritis; Imaging | Case 1. An 80-year-old Caucasian woman presented with a 10-day history of headaches, intermittent binocular diplopia, and jaw pain. Temporal artery biopsy confirmed a diagnosis of giant cell arteritis. MRI with contrast showed enhancement of bilateral optic nerve sheaths in addition to enhancement o... |
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MRI Characteristics of Cavernous Sinus and Superior Ophthalmic Vein Septic Thrombosis | Devin D. Mackay, MD; Valérie Biousse, MD | Cerebral Venous Thrombosis; Cavernous Sinus Thrombosis; Superior Ophthalmic Vein; MRI | Septic left cavernous sinus and superior ophthalmic vein thrombosis, secondary to left maxillary tooth abscess. MRI characteristics. Figure 1 : MRI Orbits (Coronal T2 with fat suppression) : Left periorbital edema (increased T2 signal, yellow arrows) extends inferiorly along the premalar tissues to ... |