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Related Experiment Videos

[The physiological pattern of lumbar intervertebral disk height]

M Biggemann1, W Frobin, P Brinckmann

  • 1Radiologische Klinik, Evangelisches Krankenhaus Bethesda, Duisburg.

Rofo : Fortschritte Auf Dem Gebiete Der Rontgenstrahlen Und Der Nuklearmedizin
|July 1, 1997
PubMed
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A new method objectively quantifies lumbar disc heights from lateral spine radiographs. The physiological sequence of disc height is uncommon, meaning deviations may be normal, not pathological.

Area of Science:

  • Radiology
  • Orthopedics
  • Biomechanics

Background:

  • Assessing lumbar disc height is crucial for diagnosing spinal conditions.
  • Current methods may lack objectivity and be influenced by spinal curvature.

Purpose of the Study:

  • To introduce a novel, objective method for quantifying lumbar disc heights on lateral radiographs.
  • To analyze the typical craniocaudal sequence pattern of lumbar disc heights in healthy individuals.

Main Methods:

  • Developed a new parameter: ventrally measured disc height, corrected for lordosis and radiographic magnification.
  • Measured lumbar disc heights objectively in 211 healthy individuals (146 males, 65 females).
  • Analyzed the craniocaudal sequence pattern using mean values and inter-disc height differences.

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Main Results:

  • Normative values showed increased disc height from L1/L2 to L4/L5, then stable or decreased height from L4/L5 to L5/S1.
  • This "physiological sequence" was observed in only 36% of males and 55% of females.
  • Significant deviations from the mean sequence were common in healthy subjects.

Conclusions:

  • The "physiological sequence of lumbar disc height" pattern can lead to false positive pathological results, particularly at L4/L5.
  • An increase in disc height from L4/L5 to L5/S1 can be a normal finding.
  • Decreased disc height should be identified by abrupt changes between adjacent discs, not by deviation from a sequence pattern.