Abstract
In the article published in this issue of the American Journal of Neuroradiology , “Evaluation of Virtual Noncontrast Images Obtained from Dual-Energy CTA for Diagnosing Subarachnoid Hemorrhage,”[1][1] the authors studied 84 patients, including 55 with subarachnoid hemorrhages (SAHs), by using
Highlights
In the article published in this issue of the American Journal of Neuroradiology, “Evaluation of Virtual Noncontrast Images Obtained from Dual-Energy CTA for Diagnosing Subarachnoid Hemorrhage,”[1] the authors studied 84 patients, including 55 with subarachnoid hemorrhages (SAHs), by using standard noncontrast head CT (TNC), dual-energy CT (DECT) angiography, and a virtual noncontrast CT (VNC) derived from the DECT angiography
DECT angiography has been used for other disease entities outside the central nervous system, and only very few publications have touched on its use within the central nervous system, including 1 article on unruptured aneurysms[2] and another on a heterogeneous collection of intracranial bleeds.[3]
An estimated 80%– 85% of atraumatic SAH is caused by a ruptured cerebral aneurysm
Summary
In the article published in this issue of the American Journal of Neuroradiology, “Evaluation of Virtual Noncontrast Images Obtained from Dual-Energy CTA for Diagnosing Subarachnoid Hemorrhage,”[1] the authors studied 84 patients, including 55 with subarachnoid hemorrhages (SAHs), by using standard (true) noncontrast head CT (TNC), dual-energy CT (DECT) angiography, and a virtual noncontrast CT (VNC) derived from the DECT angiography. One must very carefully perform a risk/benefit analysis for any dose reduction in terms of potential compromise in missed diagnoses and the ultimate harm to patients of such misses.
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