Disya RatanakornFrederick W. KremkauLawrence G. MyersDana B. MeadsCharles H. TegelerWake Forest University School of MedicineMahidol UniversityNorth Carolina Baptist Hospital2018-07-042018-07-041998-01-01Journal of Neuroimaging. Vol.8, No.3 (1998), 175-17715526569105122842-s2.0-0031808064https://repository.li.mahidol.ac.th/handle/20.500.14594/18363© 1998 by the American Society of Neuroimaging. 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.Mahidol UniversityHealth ProfessionsMedicineNeuroscienceArticleSCOPUS10.1111/jon199883175