Mirror-image artifact can affect transcranial Doppler interpretation.
Transcranial Doppler ultrasonography (TCD) allows evaluation of blood-flow velocity in intracranial arteries detection and monitoring of vasospasm in patients with subarachnoid hemorrhage. Spectral Doppler artifacts can affect TCD data. A 1-month series of TCD findings showed marked fluctuation in blood-flow velocity values in both the middle and anterior cerebral arteries of a patient with subarachnoid hemorrhage. A mirror-image artifact of the Doppler fast Fourier transform velocity spectrum resulted in erroneous interpretation of higher flow velocity in certain vessels. This artifact may cause misinterpretation of TCD flow-velocity data and lead to improper diagnosis of the condition and treatment of patients.
Department of Neurology, Wake Forest University School of Medicine, Winston-Salem, NC, USA.
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Ratanakorn
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Kremkau
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Myers
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Meads
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Tegeler
D017542:Aneurysm, Ruptured / Q000000981:diagnostic imaging*; D016477:Artifacts; D001783:Blood Flow Velocity / Q000502:physiology; D005260:Female; D006801:Humans; D002532:Intracranial Aneurysm / Q000000981:diagnostic imaging*; D002546:Ischemic Attack, Transient / Q000000981:diagnostic imaging*; D008875:Middle Aged; D012680:Sensitivity and Specificity; D013345:Subarachnoid Hemorrhage / Q000000981:diagnostic imaging*; D017585:Ultrasonography, Doppler, Transcranial