硬脑膜静脉窦血栓形成和静脉性脑梗
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History
A 23-year-old patient with a history of sickle cell disease presents with an altered mental status.
Question
1.1Based on the following images, which radiographic findings are present? (Check all that apply and click the Submit button.)
A、'Cord' sign
B、'Empty delta' sign
C、'Dense vein' sign
D、'Radial band' sign
Question
2.1 What is the most likely etiology of the findings in these diffusion-weighted/apparent diffusion coefficient map images?
A、Left middle cerebral artery thrombus
B、Right posterior cerebral artery thrombus
C、Superior sagittal sinus thrombus
D、Right anterior cerebral artery thrombus
Question
3.1 Cerebral MR venography is commonly performed with 2D time-of-flight (TOF) and phase-contrast imaging. What are some potential disadvantages of 2D TOF venography?
A、An unreliable suppression of short T1 substances, which may mimic blood flow
B、Poor visualization of in-plane flow
C、Long scan times
D、Signal loss due to susceptibility artifacts
Question
4.1 Which of the following conditions are associated with cerebral venous sinus thrombosis?
A、Malignancy
B、Dehydration
C、Sickle cell disease
D、Oral contraceptive use
E、Alzheimer disease
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