Moreover, the requirement for iodinated contrast may limit use of CTP in patients with acute or severe chronic renal insufficiency. Cerebrovascular Diseases-Stroke head without and with IV contrast specifically for the evaluation of venous sinus thrombosis unless noncontrast CT is otherwise indicated for parenchymal assessment. CT Head Without IV Contrast Noncontrast CT of the head is essential in the initial evaluation of CVT. The primary usefulness of noncontrast CT of the head in the initial evaluation of CVT is to evaluate for hemorrhagic complication and alternative etiologies. Noncontrast CT may show sinus hyperdensity. However, only 30% of noncontrast head CT examinations are abnormal in the setting of CVT [99]. CTA Neck With IV Contrast There is no relevant literature to support the use of CTA of the neck in the initial evaluation of CVT. CTA of the neck may be useful for endovascular surgical planning for venous sinus thrombectomy, if clinically relevant. CTV Head With IV Contrast CTV of the head is a useful, rapid initial evaluation with a high sensitivity and specificity for detection of CVT. CT is particularly useful when MRI is contraindicated or when MRI artifacts are suspected that could obscure the diagnosis. Specifically, CTV is as accurate in diagnosis of CVT as MRV [101]. MRA Head Without and With IV Contrast There is no relevant literature to support the use of MRA of the head in the initial evaluation of CVT. MRA Head Without IV Contrast There is no relevant literature to support the use of MRA of the head in the initial evaluation of CVT. MRA Neck Without and With IV Contrast There is no relevant literature to support the use of MRA of the neck in the initial evaluation of CVT. MRA Neck Without IV Contrast There is no relevant literature to support the use of MRA of the neck in the initial evaluation of CVT.
Cerebrovascular Diseases Stroke and Stroke Related Conditions PCAs. Moreover, the requirement for iodinated contrast may limit use of CTP in patients with acute or severe chronic renal insufficiency. Cerebrovascular Diseases-Stroke head without and with IV contrast specifically for the evaluation of venous sinus thrombosis unless noncontrast CT is otherwise indicated for parenchymal assessment. CT Head Without IV Contrast Noncontrast CT of the head is essential in the initial evaluation of CVT. The primary usefulness of noncontrast CT of the head in the initial evaluation of CVT is to evaluate for hemorrhagic complication and alternative etiologies. Noncontrast CT may show sinus hyperdensity. However, only 30% of noncontrast head CT examinations are abnormal in the setting of CVT [99]. CTA Neck With IV Contrast There is no relevant literature to support the use of CTA of the neck in the initial evaluation of CVT. CTA of the neck may be useful for endovascular surgical planning for venous sinus thrombectomy, if clinically relevant. CTV Head With IV Contrast CTV of the head is a useful, rapid initial evaluation with a high sensitivity and specificity for detection of CVT. CT is particularly useful when MRI is contraindicated or when MRI artifacts are suspected that could obscure the diagnosis. Specifically, CTV is as accurate in diagnosis of CVT as MRV [101]. MRA Head Without and With IV Contrast There is no relevant literature to support the use of MRA of the head in the initial evaluation of CVT. MRA Head Without IV Contrast There is no relevant literature to support the use of MRA of the head in the initial evaluation of CVT. MRA Neck Without and With IV Contrast There is no relevant literature to support the use of MRA of the neck in the initial evaluation of CVT. MRA Neck Without IV Contrast There is no relevant literature to support the use of MRA of the neck in the initial evaluation of CVT.