Some results of high‐flow‐velocity NMR imaging using selection gradient

Cho, Z. H.; Oh, Chang Hyun; Mun, C. W.; Kim, Y. S.

doi:10.1002/mrm.1910030606

Cited by 11 publications

(5 citation statements)

References 8 publications

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“…In this study, a second radiologist did confirm positive results and the authors believe, while this is not a formal test of reliability, it does show that both tests are certainly reliable for positive findings. Finally, we used a new technique for evaluation of patients with THA and possible pseudotumors (SEMAC), and because we did not also perform the MARS technique used by other authors [8,25], the two methods cannot be directly compared.…”

Section: Discussionmentioning

confidence: 99%

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The John Charnley Award: Diagnostic Accuracy of MRI Versus Ultrasound for Detecting Pseudotumors in Asymptomatic Metal-on-Metal THA

Garbuz

Hargreaves

Duncan

et al. 2013

Clin Orthop Relat Res

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Background The prevalence of pseudotumors in patients with large-head metal-on-metal (MOM) THA has been the subject of implant recalls and warnings from various regulatory agencies. To date, there is no consensus on whether ultrasound or MRI is superior for the detection of pseudotumors. Questions/purposes We prospectively compared ultrasound to MRI for pseudotumor detection in an asymptomatic cohort of patients with MOM THAs. We also compared ultrasound to MRI for assessment of pseudotumor growth and progressive soft tissue involvement at a 6-month interval. Methods We enrolled 40 patients with large-head MOM THAs in the study. The mean age was 54 years (range, 34-76 years). The mean time from surgery was 54 months (range, 40-81 months). There were 28 men and 12 women. All patients underwent ultrasound and MRI using slice encoding for metal artifact correction. The gold standard was defined as follows: if both ultrasound and MRI agreed, this was interpreted as concordant and the result was considered accurate. (Toronto, Ontario, Canada). The institution of one or more of the authors (BAH) has received, during the study period, funding from GE Healthcare (Waukesha, WI, USA) and the NIH (Bethesda, MD, USA). One of the authors (DSG) certifies that he or she has received or may receive payments or benefits, during the study period, an amount of USD 10,000 to USD 100,000 from Zimmer, Inc. One of the authors (CPD) certifies that he or she has received or may receive payments or benefits, during the study period, an amount of USD 10,000 to USD 100,000 from Zimmer, Inc, and an amount of USD 10,000 to USD 100,000 from DePuy Synthes Canada Ltd. One of the authors (BAM) certifies that he or she has received or may receive payments or benefits, during the study period, an amount of USD 10,000 to USD 100,000 from Zimmer, Inc. The remaining authors (BAH, DFW, BBF) certify that they have no commercial associations (eg, consultancies, stock ownership, equity interest, patent/licensing arrangements, etc) that might pose a conflict of interest in connection with the submitted article. All ICMJE Conflict of Interest Forms for authors and Clinical Orthopaedics and Related Research editors and board members are on file with the publication and can be viewed on request. Clinical Orthopaedics and Related Research neither advocates nor endorses the use of any treatment, drug, or device. Readers are encouraged to always seek additional information, including FDA approval status, of any drug or device before clinical use. Each author certifies that the human protocol for this investigation was approved by the appropriate ethics committee at his or her institution, that all investigations were conducted in conformity with the ethical principles of research, and that informed consent for participation in the study was obtained. This work was performed at the Departments of Orthopaedics and Radiology, University of British Columbia (Vancouver, British Columbia, Canada) and at Vancouver General Hospital (Vancouver, British Columbia...

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Section: Discussionmentioning

confidence: 99%

“…View angle tilting (VAT) [8] is a simple pulse sequence modification to spin echo imaging to reduce in-plane displacements. For both VAT and conventional sequences, parameters may also be adjusted to reduce artifacts.…”

Section: Discussionmentioning

confidence: 99%

The John Charnley Award: Diagnostic Accuracy of MRI Versus Ultrasound for Detecting Pseudotumors in Asymptomatic Metal-on-Metal THA

Garbuz

Hargreaves

Duncan

et al. 2013

Clin Orthop Relat Res

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“…The fifth line of the figure indicates that signal acquisition captures the spin-echo signal. This sequence measures velocity through the slice (Cho et al, 1986).…”

Section: Nmr Imaging Experimentsmentioning

confidence: 99%

NMR and Microelectrode Studies of Hydrodynamics and Kinetics in Biofilms

Lewandowski

Altobelli

Fukushima

1993

Biotechnology Progress

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“…From the early and mid-1980, superconducting magnet became available and began to obtain clinically usable images. First 2.0T* MRI became a reality in 1985 (KAIS 1985) and began to provide superior images with time limits that are acceptable to the clinical community and rapidly became the major diagnostic tool (4,5). In the mid-1990, sporadically 3.0T MRI became available and starts providing improved images in certain areas.…”

Section: Introductionmentioning

confidence: 99%

Review of Recent Advancement of Ultra High Field Magnetic Resonance Imaging: from Anatomy to Tractography

Cho

2016

Investig Magn Reson Imaging

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Review ArticlePurpose: Advances of magnetic resonance imaging (MRI), especially that of the Ultra-High Field (UHF) MRI will be reviewed. Materials and Methods: Diffusion MRI data was obtained from a healthy adult young male of age 30 using a 7.0T research MRI scanner (Magnetom, Siemens) with 40 mT/m maximum gradient field. The specific imaging parameters used for the data acquisition were a single shot DW echo planar imaging. Results: Three areas of the imaging experiments are focused on for the study, namely the anatomy, angiography, and tractography. Conclusion: It is envisioned that, in near future, there will be more 7.0T MRIs for brain research and explosive clinical application research will also be developed, for example in the area of connectomics in neuroscience and clinical neurology and neurosurgery.

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Some results of high‐flow‐velocity NMR imaging using selection gradient

Cited by 11 publications

References 8 publications

The John Charnley Award: Diagnostic Accuracy of MRI Versus Ultrasound for Detecting Pseudotumors in Asymptomatic Metal-on-Metal THA

The John Charnley Award: Diagnostic Accuracy of MRI Versus Ultrasound for Detecting Pseudotumors in Asymptomatic Metal-on-Metal THA

NMR and Microelectrode Studies of Hydrodynamics and Kinetics in Biofilms

Review of Recent Advancement of Ultra High Field Magnetic Resonance Imaging: from Anatomy to Tractography

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