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Results for mean, range, and upper limits of normal PVST thickness on MDCT*
Mean PVST Thickness (range) (mm)Upper Limit of Normal PVST Thickness (mm)
C14.4 (1.5–11)8.5
C23.7 (1.5–8.5)6
C34.2 (2–9.5)7
C47 (2.5–16)N/C
C512.4 (5–20)N/C
C613 (5.5–24)18
C711.6 (2.5–21)18
  • Note:—N/C indicates that upper limits of normal at C4 and C5 were not calculated due to the inconsistent position of the esophagus and larynx among the patient population: PVST, prevertebral soft tissue; MDCT, multidetector CT.
  • * Upper limit of normal calculated as 2 SDs above the mean maximum value for 97.5% of the population.