DYNAMIC MAGNETIC RESONANCE IMAGING: PRELIMINARY PRESENTATION OF A TECHNIQUE

Bruno Da Costa Ancheschi,Helton Luiz Aparecido Defino,Raphael De Rezende Pratali,Daniel Augusto Carvalho Maranho,Marcello Teixeira Castilha,Aniello Savarese,Herton Rodrigo Tavares Costa,Carlos Fernando Pereira Da Silva Herrero,Marcello Henrique Nogueira-Barbosa

doi:10.1590/s1808-185120161503162794

Bruno Da Costa Ancheschi, Helton Luiz Aparecido Defino + Show 7 more

Open Access

https://doi.org/10.1590/s1808-185120161503162794

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Abstract

ABSTRACT Objective: To evaluate morphometric variations of the cervical spine in patients with cervical spondylotic myelopathy (CSM) using dynamic magnetic resonance imaging (MRI) in neutral, flexion and extension positions. Methods: This is a prospective study of patients with CSM secondary to degenerative disease of the cervical spine. The morphometric parameters were evaluated using T2-weighted MRI sequences in the sagittal plane in neutral, flexion and extension position of the neck. The parameters studied were the anterior length of the spinal cord (ALSC), the posterior length of the spinal cord (PLSC), the diameter of the vertebral canal (DVC) and the diameter of the spinal cord (DSC). Results: The ALSC and PLSC were longer in flexion than in extension and neutral position, with statistically significant difference between the flexion and extension position. The DVC and the DSC were greater in flexion than in extension and neutral position, however, there was no statistically significant difference when they were compared in the neutral, flexion and extension positions. Conclusion: Dynamic MRI allows to evaluate morphometric variations in the cervical spinal canal in patients with cervical spondylotic myelopathy.

Highlights

The parameters studied were the anterior length of the spinal cord (ALSC), the posterior length of the spinal cord (PLSC), the diameter of the vertebral canal (DVC) and the diameter of the spinal cord (DSC)
The DVC and the DSC were greater in flexion than in extension and neutral position, there was no statistically significant difference when they were compared in the neutral, flexion and extension positions
The parameters studied were the anterior length of the spinal cord (ALSC), the posterior length of the spinal cord (PLSC), the diameter of the vertebral canal (DVC), and the diameter of the spinal cord (DSC). (Table 1) All the images were analyzed by the same observer (BCA) using the OsiriX MD v.7.0 64-bit program under standardized 300% magnification

Summary

Introduction

Magnetic resonance (MRI) is the imaging exam of choice for the Coluna/Columna. Evaluation of CSM because, in addition to identifying intramedullary lesions, it is capable of showing compression of the cervical spinal canal.[8] The dynamic MRI modality has been studied by several authors, involving healthy individuals.[5] there is little available information in the literature about the evaluation of patients with CSM using dynamic magnetic resonance.[5] the morphological, physiological, and pathological variations in the different positions of the cervical spine revealed by dynamic magnetic resonance imaging (DMRI) were described.[5]

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