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Table 1: 
Mean blood flow velocities in major cerebral arteries obtained with imaging transcranial Doppler sonography (TCDI) versus nonimaging transcranial Doppler sonographic (TCD) velocities in children with sickle cell disease
Artery (n)IIIIIIAngle of Insonation±SD (degrees)Difference between I and III (%)Difference between II and III (%)
TCDI Angle-Corrected Velocity ± SD (cm/s)TCDI Velocity ± SD (cm/s)TCD Velocity ± SD (cm/s)
ICA Right (37)112 ± 3490 ± 14*117 ± 1823 ± 23423**
ICA Left (36)122 ± 3698 ± 27*119 ± 2327 ± 23218**
MCA Right (36)128 ± 26106 ± 22*130 ± 1930 ± 16218**
MCA Left (35)135 ± 32111 ± 33*134 ± 2632 ± 13<117**
ACA Right (35)103 ± 3474 ± 24*105 ± 2337 ± 20230**
ACA Left (34)120 ± 3888 ± 25*105 ± 3149 ± 1412*16**
PCA Right (34)105 ± 3384 ± 27*95 ± 2332 ± 161012**
PCA Left (31)99 ± 3382 ± 21*94 ± 2025 ± 17513**
  • Note:—I indicates angle-corrected TCDI; II, TCDI with no correction for the angle; III, TCD; ICA, internal carotid artery; MCA, middle cerebral artery; ACA, anterior cerebral artery; PCA, posterior cerebral artery; n, number of compared pairs.
  • * P <.05 I vs III
  • ** P <.05 II vs III.