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Comparison of Transcranial Doppler Sonography With and Without Imaging in the Evaluation of Children With Sickle Cell Anemia

M. Beth McCarville1,2, Chenghong Li3, Xiaoping Xiong3 and Winfred Wang4,5

1 Department of Radiological Sciences, Division of Diagnostic Imaging, St. Jude Children's Research Hospital, 332 N Lauderdale St., Memphis, TN 38015-2794.
2 Department of Radiology, University of Tennessee, School of Medicine, Memphis, TN 38163.
3 Department of Biostatistics, St. Jude Children's Research Hospital, Memphis, TN 38015-2794.
4 Department of Hematology-Oncology, St. Jude Children's Research Hospital, Memphis, TN 38015-2794.
5 Department of Pediatrics, University of Tennessee, School of Medicine, Memphis, TN 38163.



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  		Fig. 1. —Typical transcranial Doppler with imaging scan and recording from middle cerebral artery (MCA). Waveform is enclosed in envelope, and measurements are made over two cardiac cycles. Image is frozen to allow user to scroll along waveform and identify highest velocity. Doppler image shows circle of Willis. A = anterior cerebral artery, M = middle cerebral artery, P = posterior cerebral artery, RI = resistive index, TAMx = time-averaged mean-maximum.

 


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  		Fig. 2. —Typical transcranial Doppler sonographic recording from middle cerebral artery. Waveform is enclosed by envelope, and mean velocity measurement for entire strip (mean, 118 cm/sec) is instantaneously displayed on side panel. SYS = peak systolic velocity.

 


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  		Fig. 3. —Graph shows age-related changes in time-averaged mean-maximum velocity measurements obtained with transcranial Doppler (TCD) sonography (solid line) and TCD sonography with imaging (TCDI) (dotted line). This correlation was significant for TCD (p = 0.02) but not for TCDI (p = 0.08).

 

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