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Table 4 Comparison between MRI and two different US methods in ONSD assessment

From: The CLOSED protocol to assess optic nerve sheath diameter using color-Doppler: a comparison study in a cohort of idiopathic normal pressure hydrocephalus patients

Difference

MRI vs. US B-mode

(27 pt.)

TDR

SDR

TDL

SDL

Average (SD)

1.338 (1.629)

1.416 (1.574)

1.274 (1.681)

1.335 (1.546)

Difference

MRI vs. US color-Doppler (23 pt.)

TDR

SDR

TDL

SDL

Average (SD)

3.178 (0.769)

3.176 (0.500)

3.011 (0.780)

3.052 (0.563)

  1. The average difference between MRI and US B-mode measurements has much lower values than the average difference between MRI and US color-Doppler mode for each diameter
  2. MRI magnetic resonance imaging, US ultrasound, SD standard deviation, TDR, transverse diameter right, SDR, sagittal diameter right, TDL transverse diameter left, SDL sagittal diameter left