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Table 1 Description of Measurements taken from first lumbar vertebra (L1)

From: Identification of sex and age for Egyptians using computed tomography of the first lumbar vertebra

Measu-rement

Description

Measure-ment planea

Adjustment Planeb

EPDu

Measurement taken in between the most anterior and the most posterior edges of upper border of the body of the vertebra (upper endplate)

MIP Sagittal

In axial and coronal planes to obtain the best view for L1 center

EPDl

Measurement taken in between the most anterior and the most posterior edges of lower border of the body of the vertebra (lower endplate)

XHA

taken between the uppermost and lowermost points for the anterior body border

XHP

taken between uppermost and lowermost points for the posterior body border

LVF

Internal sagittal length of foramen of the vertebra from inner part of posterior border of the spinous process to inner aspect of posterior border of the body of vertebra

SPL

From most posterior edge of the spinous process to inner posterior border of vertebral foramen

SPH

Measurement from superior to inferior borders of the vertebral spinous process at junction of posterior and middle one third

VL

Measured From the most posterior endpoint of the spinous process to the center of an imaginary line passing with anterior border of the body

PH

Measured from superior to inferior borders of the left pedicle

MIP Sagittal

In axial plane

EPWl

Distance taken between the two lateralmost points in the lower border of the body of the vertebra (lower endplate)

MIP Coronal

In axial and sagittal planes for best view of body center

EPWu

Distance taken between the two lateralmost points in the upper border of the body of the vertebra (upper endplate)

WFV

maximum inner width of foramen of the vertebra

Axial

In sagittal plane at level passing the pedicle center

PW

Distance taken from the most lateral to the most medial edges for left pedicle

TDm

Measured between lateral edges of both transverse processes

TD

Measured from inner border of the lamina to the right transverse process tip

  1. athe primary plane in which the measurement was taken
  2. bthe plane used to adjust the primary images for best and accurate view of measurement
  3. PW, WVF, TDm and TD weren’t taken in MIP because either the measurement is small so may be distorted in MIP images or the measurement borders aren’t well identified or not clear in MIP images