Results of a prospective multicenter study for evaluation of the diagnostic quality of an open whole-body low-field MRI unit.

Merl, T.; Scholz, Martin; Gerhardt, P; Langer, Mathias; Laubenberger, Jörg; Weiss, H.-D.; Gehl, Hans-Björn; Wolf, K. J.; Ohnesorge, I.

doi:10.1016/s0720-048x(98)00134-x

Cited by 51 publications

(37 citation statements)

References 47 publications

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“…On the other hand, the low-field system have less chemical shift, susceptibility and flow artefacts, the evaluation of subchondral bones is better by low-field and the patient tolerance is slightly better [32]. Also one multi-centre study found comparable diagnostic accuracy in spinal disease using a low-field 0.2 T Magnetom Open as used in this study and a high-field MRI system [26]. To our knowledge low-and high-field have not been compared in relation to cervical trauma.…”

Section: Discussionmentioning

confidence: 58%

Are early MRI findings correlated with long-lasting symptoms following whiplash injury? A prospective trial with 1-year follow-up

et al. 2008

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Neck pain is the cardinal symptom following whiplash injuries. The trauma mechanism could theoretically lead to both soft tissue and bone injury that could be visualised by means of MRI. From previous quite small trials it seems that MRI does not demonstrate significant tissue damage. Large prospectively followed cohorts are needed to identify possible clinically relevant MRI findings. The objective of this trial was to evaluate (1) the predictive value of cervical MRI after whiplash injuries and (2) the value of repeating MRI examinations after 3 months including sequences with flexion and extension of the cervical spine. Participants were included after rearend or frontal car collisions. Patients with fractures or dislocations diagnosed by standard procedures at the emergency unit were not included. MRI scans of the cervical spine were performed at baseline and repeated after 3 months. Clinical follow-ups were performed after 3 and 12 months. Outcome parameters were neck pain, headache, neck disability and working ability. A total of 178 participants had a cervical MRI scan on average 13 days after the injury. Traumatic findings were observed in seven participants. Signs of disc degeneration were common and most frequent at the C5-6 and C6-7 levels. Findings were not associated with outcome after 3 or 12 months. The population had no considerable neck trouble prior to the whiplash injury and the non-traumatic findings represent findings to be expected in the background population. Trauma-related MRI findings are rare in a whiplash population screened for serious injuries in the emergency unit and not related to a specific symptomatology. Also, pre-existing degeneration is not associated with prognosis.

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Section: Discussionmentioning

confidence: 58%

Are early MRI findings correlated with long-lasting symptoms following whiplash injury? A prospective trial with 1-year follow-up

et al. 2008

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“…There were three false-negative findings due to partial tears that were missed on MR imaging but seen during the arthroscopic procedure. Merl et al [24] in their multi-center study found no significant differences between unenhanced high-field and low-field imaging in diagnosing shoulder impingement and tears of the rotator cuff. Loew and co-workers in their performance study on low-field MR arthrography [8] reported an excellent or substantial interobserver agreement with respect to complete tears of the supraspinatus and the infraspinatus tendon, and the presence of tendinitis of the rotator cuff (κ=0.93, 0.65, and 0.80, respectively; Figs.…”

Section: Rotator Cuff Lesionsmentioning

confidence: 91%

“…Shellock et al in a recent study on unenhanced low-field imaging of 47 patients found a sensitivity and specificity for the detection of labral lesions of 89 and 95%, respectively [23]. In a multicenter study on 122 patients, Merl and co-workers reported no significant discrepancies between unenhanced high-field and low-field imaging with an accuracy of 77 and 80%, respectively [24]. Allmann et al [25] analyzed the effect of field strength in the evaluation of shoulder instability.…”

Section: Glenohumeral Instabilitymentioning

confidence: 96%

Low-field MR arthrography of the shoulder joint: technique, indications, and clinical results

et al. 2003

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“…Until recently, their main disadvantage was the low field (0.2 T), which resulted in poor quality imaging. [26]. Diagnostic value of recently produced "open" high field MRI scanners (1.0 T) is yet to be confirmed [27].…”

Section: Discussionmentioning

confidence: 99%

Patient’s Comfort and Technical Quality Exams at 1.5 and 3.0 T Magnetic Resonance Imaging

Vujmilović¹,

Vujnović²,

Kovačević-Dragosavljević³

et al. 2016

OJRad

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Increased interest of clinicians for using 3.0 T magnetic resonance imaging (MRI), as imaging modality of choice for their patients, has been evident in the past few years. The aim of this study was to compare the technical quality of the obtained tomography using 3.0 T and 1.5 T MRI, and to compare the subjective feeling of discomfort of patients and subjective acoustic noise experience during imaging using MRI at 3.0 T and 1.5 T. Brain MRI (1.5 and 3.0 T) was performed in 58 patients, according to a standardized protocol. All studies have been randomly described by independent two radiologists. The reference standard for the existence of technical artifact is established on the basis of both radiologists' consensus. We also compared the subjective feelings of the discomfort and acoustic noise during the both MRI (1.5 T and 3.0 T) exams. Artifacts were significantly more common during 3.0 T MRI in comparison with the 1.5 T MRI (χ 2 = 5.286, P < 0.05), as well as in male patients (χ 2 = 8.841, P < 0.05), and subjective assessments of discomfort and acoustic noise were higher in patients who underwent imaging using 3.0 T MRI, (χ 2 = 125.959, df = 1, P < 0.001) and in females (χ 2 = 195.449, df = 1, P < 0.001). Additional research is needed to prove that appropriate information for patients about the discomfort during 3.0 T MRI and their psychological preparation is very important element for optimal use of 3.0 T MRI in daily clinical practice.

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Results of a prospective multicenter study for evaluation of the diagnostic quality of an open whole-body low-field MRI unit.

Cited by 51 publications

References 47 publications

Are early MRI findings correlated with long-lasting symptoms following whiplash injury? A prospective trial with 1-year follow-up

Are early MRI findings correlated with long-lasting symptoms following whiplash injury? A prospective trial with 1-year follow-up

Low-field MR arthrography of the shoulder joint: technique, indications, and clinical results

Patient’s Comfort and Technical Quality Exams at 1.5 and 3.0 T Magnetic Resonance Imaging

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