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Degeneration and height of cervical discs classified from MRI compared with precise height measurements from radiographs.

Abstract：

STUDY DESIGN:Descriptive study comparing MRI classifications with measurements from radiographs. OBJECTIVES:1. Define the relationship between MRI classified cervical disc degeneration and objectively measured disc height. 2. Assess the level of inter- and intra-observer errors using MRI in defining cervical disc degeneration. SUMMARY OF BACKGROUND DATA:Cervical spine degeneration has been defined radiologically by loss of disc height, decreased disc and bone marrow signal intensity and disc protrusion/herniation on MRI. The intra- and inter-observer error using MRI in defining cervical degeneration influences data interpretation. Few previous studies have addressed this source of error. The relation and time sequence between cervical disc degeneration classified by MRI and cervical disc height decrease measured from radiographs is unclear. METHODS:The MRI classification of degeneration was based on nucleus signal, prolaps identification and bone marrow signal. Two neuro-radiologists evaluated the MR-images independently in a blinded fashion. The radiographic disc height measurements were done by a new computer-assisted method compensating for image distortion and permitting comparison with normal level-, age- and gender-appropriate disc height. RESULTS/CONCLUSIONS:1. Progressing disc degeneration classified from MRI is on average significantly associated with a decrease of disc height as measured from radiographs. Within each MRI defined category of degeneration measured disc heights, however, scatter in a wide range. 2. The inter-observer agreement between two neuro-radiologists in both defining degeneration and disc height by MRI was only moderate. Studies addressing questions related to cervical disc degeneration should take this into consideration.

journal_name

Eur J Radiol

journal_title

European journal of radiology

authors

Kolstad F,Myhr G,Kvistad KA,Nygaard OP,Leivseth G

doi

10.1016/j.ejrad.2005.02.005

keywords:

subject

Has Abstract

pub_date

2005-09-01 00:00:00

pages

415-20

issue

eissn

0720-048X

issn

1872-7727

pii

S0720-048X(05)00074-4

journal_volume

pub_type

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Degeneration and height of cervical discs classified from MRI compared with precise height measurements from radiographs.