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Fig. 3C —Comparison of image quality and image noise in three patients
with different types of congenital aortic arch abnormalities (arrows)
evaluated with 64-MDCT with use of automatic tube current modulation. All
patients are male and under 1 year old. Oblique sagittal
maximum-intensity-projection images (upper row) and transverse
section images (lower row) of patients scanned at 80 (A), 100
(B), and 120 (C) kVp appear grainier at lower compared with
higher beam energy levels, but diagnostic quality is not compromised in any
cases. Asterisk in C indicates patent ductus arteriosus in patient with
an interrupted aortic arch.
