MRI of the Knee at 7.0 Tesla

Kraff, Oliver; Theysohn, JM; Maderwald, Stefan; Saylor, Charles; Ladd, Susanne C.; Ladd, Mark E.; Barkhausen, Jörg

doi:10.1055/s-2007-963607

Cited by 43 publications

(28 citation statements)

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“…Reasons for the long examination time were the long scanning time itself that was partly due to little experience with the scanning protocols and the optimization of image contrasts as well as a lack of routine with subjects' logistics (e.g., handling of the coils, manual movement of the scanner table). However, working routine and the establishment of standardized protocols will bring a significant reduction in examination time [Kraff et al, 2007]; although the length of a 7 T examination might, in general, be longer than for 1.5 T given that higher spatial resolutions are usually desired and achievable.…”

Section: Discussionmentioning

confidence: 99%

A large-scale study on subjective perception of discomfort during 7 and 1.5 T MRI examinations

Heilmaier

Theysohn

Maderwald

et al. 2011

Bioelectromagnetics

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A study on subjective perception has been carried out in order to gain further insight into subjective discomfort and sensations experienced during 7 T magnetic resonance imaging (MRI). This study provides information about subjective acceptance, which is essential if 7 T MRI is to become a clinical diagnostic tool. Of 573 subjects who underwent 7 T MRI, 166 were also examined at 1.5 T, providing a means of discriminating field-dependent discomfort. All subjects judged sources of discomfort and physiological sensations on an 11-point scale (0 = no side effects, 10 = intolerable side effects) and scores were analyzed separately for exam phases, with and without table movement at each field strength. Results revealed that 7 T MRI was, in general, judged more uncomfortable than 1.5 T; however, most subjects rated the effects as being non-critical (mean scores between 0.5 and 3.5). Significant differences were detected regarding vertigo and sweating between subjects positioned "head-first" and "feet-first" at 7 T (worse in "head-first") and between 7 and 1.5 T (worse at 7 T), with the effects being more pronounced in the moving compared to the stationary table position. The most unpleasant factor at 7 T was the extensive examination duration, while potentially field-dependent sensations were rated less bothersome. In summary, our study indicates that although certain sensations increase at 7 T compared to 1.5 T, they are unlikely to hinder the use of 7 T MRI as a clinical diagnostic tool.

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Section: Discussionmentioning

confidence: 99%

A large-scale study on subjective perception of discomfort during 7 and 1.5 T MRI examinations

Heilmaier

Theysohn

Maderwald

et al. 2011

Bioelectromagnetics

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“…Different field strengths are used for MRI, commonly ranging from 0.2 to 4.0 Tesla (T). Higher field strengths have been scientifically introduced with up to 7.0 T and more since 2007 (5).…”

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confidence: 99%

Revision Surgery Due to Magnet Dislocation in Cochlear Implant Patients

Hassepaß

Stabenau

Maier

et al. 2014

Otology &Amp; Neurotology

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The present study underlines that MRI examination is the main cause of magnet dislocation. The use of compressive bandaging when using 1.5-T MRI does not eliminate the risk of magnet dislocation. Additional cautionary measures are for required for conditional MRI. We recommend X-ray examination after MRI to determine magnet dislocation and avoid major complications in all cases reporting pain during or after MRI. Additional research regarding silicon magnet pocket design for added retention is needed. Effective communication of guidelines for precautionary measures during MRI examination in CI patients is mandatory for all clinicians involved. MRI in CI recipients should be indicated with caution.

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“…As MSK MRI involves imaging of stationary tissue without the need for breath-holding, potentially advantageous characteristics of high-field MRI could be exploited to their full extent. This results in excellent visualization of detailed anatomy [42,43] Fig. 4) and reveals its superiority compared to lower, yet well-established field strengths (3 T) [44,45].…”

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confidence: 99%

7 Tesla MR Imaging: Opportunities and Challenges

Umutlu

Ladd

Forsting³

et al. 2013

Fortschr Röntgenstr

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The urge to increase magnetic field strength is driven by a number of potentially beneficial physical changes, possibly resulting in improved MR diagnostics. With the successful introduction of in-vivo ultra-high-field MR imaging, by means of 7 Tesla MRI, the focus of scientific research has been set on compiling different applications of brain and body imaging. This review presents an overview on the current status of 7?T MR imaging, investigating the opportunities as well as challenges associated with ultra-high-field MRI. Citation Format: ??Umutlu L, Ladd ME, Forsting M et?al. 7 Tesla MR?Imaging: Opportunities and Challenges. Fortschr R?ntgenstr 2014; 186: 121???129

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MRI of the Knee at 7.0 Tesla

Cited by 43 publications

References 0 publications

A large-scale study on subjective perception of discomfort during 7 and 1.5 T MRI examinations

A large-scale study on subjective perception of discomfort during 7 and 1.5 T MRI examinations

Revision Surgery Due to Magnet Dislocation in Cochlear Implant Patients

7 Tesla MR Imaging: Opportunities and Challenges

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