For example, a concurrent or follow-up CTA is useful in suspected cases of intracranial aneurysm (ruptured or unruptured), arterial dissection, and RCVS [10-12,18]. CTV Head With IV Contrast There is no relevant literature to support the use of CT venography (CTV) head with IV contrast in the initial imaging evaluation of TCH. Following initial evaluation with a noncontrast head CT, head CTV can be useful when there are clinical or imaging findings suspicious for CVT, which is a less common cause of TCH [11,13]. MRA Head With IV Contrast There is no relevant literature to support the use of MR angiography (MRA) head with IV contrast in the initial imaging evaluation of TCH. MRA Head Without and With IV Contrast There is no relevant literature to support the use of MRA head without and with IV contrast in the initial imaging evaluation of TCH. MRA Head Without IV Contrast There is no relevant literature to support the use of MRA head without IV contrast in the initial imaging evaluation of TCH. However, similar to head CTA, brain MRA can be obtained as a follow-up imaging study when there are clinical or imaging findings concerning for aneurysm, dissection, RCVS, or AVM [11]. MRI Head With IV Contrast There is no relevant literature to support the use of MRI head with IV contrast in the initial imaging evaluation of TCH. MRI Head Without and With IV Contrast There is no relevant literature to support the use of MRI head without and with IV contrast in the initial imaging evaluation of TCH; it may have utility in follow-up evaluation after initial neuroimaging. Contrast-enhanced brain MRI can be useful in the diagnosis of SIH, pituitary apoplexy, and intraventricular colloid cyst, which are rare causes of TCH [11]. High-resolution MRI using vessel wall imaging may be useful in differentiating various vasculitides from RCVS and in identifying dissection of the intracranial vessels, compared with standard MRI.
Headache PCAs. For example, a concurrent or follow-up CTA is useful in suspected cases of intracranial aneurysm (ruptured or unruptured), arterial dissection, and RCVS [10-12,18]. CTV Head With IV Contrast There is no relevant literature to support the use of CT venography (CTV) head with IV contrast in the initial imaging evaluation of TCH. Following initial evaluation with a noncontrast head CT, head CTV can be useful when there are clinical or imaging findings suspicious for CVT, which is a less common cause of TCH [11,13]. MRA Head With IV Contrast There is no relevant literature to support the use of MR angiography (MRA) head with IV contrast in the initial imaging evaluation of TCH. MRA Head Without and With IV Contrast There is no relevant literature to support the use of MRA head without and with IV contrast in the initial imaging evaluation of TCH. MRA Head Without IV Contrast There is no relevant literature to support the use of MRA head without IV contrast in the initial imaging evaluation of TCH. However, similar to head CTA, brain MRA can be obtained as a follow-up imaging study when there are clinical or imaging findings concerning for aneurysm, dissection, RCVS, or AVM [11]. MRI Head With IV Contrast There is no relevant literature to support the use of MRI head with IV contrast in the initial imaging evaluation of TCH. MRI Head Without and With IV Contrast There is no relevant literature to support the use of MRI head without and with IV contrast in the initial imaging evaluation of TCH; it may have utility in follow-up evaluation after initial neuroimaging. Contrast-enhanced brain MRI can be useful in the diagnosis of SIH, pituitary apoplexy, and intraventricular colloid cyst, which are rare causes of TCH [11]. High-resolution MRI using vessel wall imaging may be useful in differentiating various vasculitides from RCVS and in identifying dissection of the intracranial vessels, compared with standard MRI.