MRI Head Without and With IV Contrast MRI of the head is useful in the ongoing evaluation of CVT in evaluating for progressive ischemic and hemorrhagic venous infarct. Contrast is not always required for structural brain imaging but adds to the overall MRI evaluation of venous sinus thrombosis [102] and is commonly administered when MRI is performed together with MRV. Delayed postcontrast imaging can further improve assessment of T1 hyperintense thrombus burden. Noncontrast black blood thrombus imaging may approach the accuracy of contrast-enhanced MRV and negate the need for either MRV or contrast-enhanced examination, but it is less well-validated in clinical practice [103]. MRI Head Without IV Contrast MRI of the head is useful in the ongoing evaluation of CVT in evaluating for progressive ischemic and hemorrhagic venous infarct. Contrast is not always required for structural brain imaging but adds to the overall MRI evaluation Cerebrovascular Diseases-Stroke of venous sinus thrombosis [102] and is commonly administered when MRI is performed together with MRV. Delayed postcontrast imaging can further improve assessment of T1 hyperintense thrombus burden. Noncontrast black blood thrombus imaging may approach the accuracy of contrast-enhanced MRV and negate the need for either MRV or contrast-enhanced examination, but it is less well-validated in clinical practice [103]. MRV Head Without and With IV Contrast Although contrast-enhanced venography is the most accurate means of assessment for CVT, contrast-enhanced and TOF MRV imaging techniques are complementary, in that a contrast-enhanced MRV may provide a better assessment of a hypoplastic dural venous sinus with slow flow and TOF MRV mitigates against T1 isointense thrombus, which may mimic a normal opacification of the sinus on contrast-enhanced MRV [104].
Cerebrovascular Diseases Stroke and Stroke Related Conditions PCAs. MRI Head Without and With IV Contrast MRI of the head is useful in the ongoing evaluation of CVT in evaluating for progressive ischemic and hemorrhagic venous infarct. Contrast is not always required for structural brain imaging but adds to the overall MRI evaluation of venous sinus thrombosis [102] and is commonly administered when MRI is performed together with MRV. Delayed postcontrast imaging can further improve assessment of T1 hyperintense thrombus burden. Noncontrast black blood thrombus imaging may approach the accuracy of contrast-enhanced MRV and negate the need for either MRV or contrast-enhanced examination, but it is less well-validated in clinical practice [103]. MRI Head Without IV Contrast MRI of the head is useful in the ongoing evaluation of CVT in evaluating for progressive ischemic and hemorrhagic venous infarct. Contrast is not always required for structural brain imaging but adds to the overall MRI evaluation Cerebrovascular Diseases-Stroke of venous sinus thrombosis [102] and is commonly administered when MRI is performed together with MRV. Delayed postcontrast imaging can further improve assessment of T1 hyperintense thrombus burden. Noncontrast black blood thrombus imaging may approach the accuracy of contrast-enhanced MRV and negate the need for either MRV or contrast-enhanced examination, but it is less well-validated in clinical practice [103]. MRV Head Without and With IV Contrast Although contrast-enhanced venography is the most accurate means of assessment for CVT, contrast-enhanced and TOF MRV imaging techniques are complementary, in that a contrast-enhanced MRV may provide a better assessment of a hypoplastic dural venous sinus with slow flow and TOF MRV mitigates against T1 isointense thrombus, which may mimic a normal opacification of the sinus on contrast-enhanced MRV [104].