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Sep 15, 2017 · Upright or postural MRI is conceptually the modality of choice for dynamic imaging of the spine. It combines the superior contrast resolution of MRI with the advantages of imaging the spine in a truly functional position and may more specifically and sensitively relate the patient’s clinical symptoms to objective imaging evidences.
- Giulia Michelini, Antonella Corridore, Silvia Torlone, Federico Bruno, Claudia Marsecano, Raffaella ...
- 10.23750/abm.v89i1-S.7012
- 2018
- Acta Biomed. 2018; 89(Suppl 1): 89-101.
- Weight-Bearing
- Flexion and Extension
- Disk Morphology
- Spinal Canal and Intervertebral Foramen
- Paraspinal Muscles
- Ligaments
- Facet Joints
- Biomechanical Aspects and Intraoperative and Postoperative Evaluation
- Translational Motion
- Angular Motion
The spine’s weight-bearing capacity, such as during standing and sitting, is an important function to evaluate. Many symptoms occur and/or are aggravated during weight-bearing. Conventional supine MRI imaging may not reveal the pathology related to one or more symptoms. Utilizing kinetic MRI provides more reliable and suitable information to accura...
Diagnostic evaluation of motion in the axial and sagittal planes is important, as symptoms may be influenced or aggravated upon positional change. Unlike kinetic MRI, other imaging methods are limited in demonstrating motion-related abnormalities.
Disk degeneration accompanies aging and some spinal disorders. Age-dependent changes in disk morphology are closely correlated with progressive disk degeneration . Signal changes in the nucleus pulposus using T2-weighted imaging is well-known in the evaluation of disk degeneration. While several grading systems have been developed to assess the sev...
Spinal canal diameter is closely associated with spinal stenosis and myelopathy. Symptoms of these disorders are relatively sensitive to positional change(s). Vitaz et al. suggested that kinetic MRI is suitable for evaluating degenerative cervical myelopathy. Muhle et al. reported a correlation between the degenerative stage and cervical myelopat...
The role of the paraspinal muscles in relation to low back pain remains unclear. However, atrophy of the paraspinal muscles may accompany pathologies such as disk herniation, spinal stenosis, and spondylolisthesis. Electromyography, ultrasonography, histopathology, and static MRI have been used to study the paraspinal muscles. However, dynamic MRI ...
Thickness of the ligamentum flavum has been frequently evaluated in relation to spinal stenosis [13, 15, 18]. However, in acute traumatic conditions, other ligaments may be important. Ignelzi reported four cases where kinetic MRI was used to assess acute cervical trauma. Though fractures demonstrated on plain X-ray or CT alone may not be indicativ...
The function spinal unit consists of three joint complexes, one intervertebral disk and two facet joints. Facet joints play an important role in segmental stability and biomechanics and are best visualized on axial images. In a study comparing normal volunteers to patients with disk herniation, it was demonstrated that the facet angle in patients i...
The definition of instability remains unclear and may be due to unknowns related to biomechanics of the functional spinal unit in vivo. Kinetic MRI’s positional imaging capability is a significant advancement in analyzing in vivo biomechanics.
For instability assessment, translation and angular motion are considered to be important parameters. Segmental motion in the sagittal plane in relation to instability has frequently been studied using flexion-extension radiographs and fluoroscopy. However, high radiation exposure and low accuracy may limit the use of radiography and fluoroscopy. W...
Using kinetic MRI, Harvey et al. demonstrated that lordosis and flexion in the lumbosacral spine had linear correlation with age in healthy subjects. McGregor et al. reported that segmental angular motion had the greatest value in the lower lumbar levels, specifically L4-L5 and L5-S1. The least amount of motion occurred at the L1-L2 junction. The...
- J. J. Abitbol, Soon-Woo Hong, Sana Khan, Jeffrey C. Wang
- 2010
Jan 19, 2018 · Dynamic MRI in the evaluation of the spine: state of the art. Abstract. Introduction: Degenerative disease of the spine is a generic term encompassing a wide range of different disease processes, which leads to spinal instability; traumatic/neoplastic events can accelerate this aging process.
- Giulia Michelini, Antonella Corridore, Silvia Torlone, Federico Bruno, Claudia Marsecano, Raffaella ...
- 2018
Mar 31, 2020 · While dynamic radiographs remain the gold standard for assessment of spondylolisthesis, real-time dynamic MRI may be a useful adjunct to conventional spine MRI, obviating the need for radiographs in select patients.
- William R Walter, Hamza Alizai, Mary Bruno, Salvador Portugal, Christopher J Burke
- 2021
Feb 7, 2020 · Dynamic MRI could show the flexional and extensional position of cervical spine, which is more similar with the natural condition of cervical spine. Some changes of spinal cord would be missed in the static MRI and can be demonstrable in dMRI [ 13 ].
- Nanfang Xu, Youyu Zhang, Guangjin Zhou, Qiang Zhao, Shaobo Wang
- 2020
Jan 19, 2018 · In human medicine, three kMRI methods exist: (1) incremental (quasi-static) acquisition, i.e., a static MRI study repeated after a change in the joint/spine position; (2) motion-triggered ...
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Sep 1, 2020 · T1-weighted dynamic contrast-enhanced MRI to differentiate nonneoplastic and malignant vertebral body lesions in the spine. Radiology 2020 ;297:382–389. Google Scholar
