Results
CTDI values demonstrated a weak correlation (r = 0.33) with CTW(n) in Group A. SNR values
demonstrated a weak negative correlation (r = -0.46) with CTW(n) in Group C. MDCT
with higher slice numbers used more tube potential resulting in higher effective doses.
There were both significantly lower CTDI and SNR values in helical mode than in axial
mode in Group B, but not Group C.