Usefulness of the fast spin-echo three-point Dixon (mDixon) image of the knee joint on 3.0-T MRI: comparison with conventional fast spin-echo<i>T</i><sub>2</sub>weighted image

Park, Hee Jin; Lee, So Yeon; Rho, Myung Ho; Chung, Eun Chul; Ahn, Jin Hwan; Park, Jai H; Lee, In S

doi:10.1259/bjr.20151074

Cited by 21 publications

(15 citation statements)

References 20 publications

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“…Most of our spine MR imaging examinations are performed with 3-T (12). In musculoskeletal applications, Dixon SE imaging has been mostly used to provide more homogeneous fat suppression than is achieved with CHESS, notably with large fields of view, such as in spine imaging, and higher signalto-noise ratio than with STIR imaging (11,(15)(16)(17)(18)(19)(20)(21). In addition, Dixon SE T2weighted water-only images have shown low sensitivity to susceptibility artifacts and performance similar to that of T2weighted CHESS and STIR techniques in detecting pathologic spinal abnormalities (16,19,22).…”

Section: Patient Populationmentioning

confidence: 99%

Bone Marrow Metastases: T2-weighted Dixon Spin-Echo Fat Images Can Replace T1-weighted Spin-Echo Images

et al. 2018

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Purpose To test the potential of Dixon T2-weighted fat-only sequences to replace T1-weighted sequences for the detection of bone metastases, with the hypothesis that diagnostic performance with an alternative magnetic resonance (MR) imaging protocol (sagittal spin-echo Dixon T2-weighted fat-only and water-only imaging) would not be inferior to that with the standard protocol (sagittal spin-echo T1-weighted and spin-echo Dixon T2-weighted water-only imaging). Materials and Methods A total of 121 consecutive whole-spine MR imaging examinations (63 men; mean age ± standard deviation, 61.4 years ± 11.8) performed for suspected vertebral bone metastases were included in this retrospective, institutional review board-approved study. Quantitative image analysis was performed for 30 randomly selected spine levels. Qualitative analysis was performed separately by two musculoskeletal radiologists, who registered the number of metastases for each spine level. Areas under the curve with the protocols were compared on the basis of nonparametric receiver operating characteristic curve estimations by using a noninferiority test on paired data, with a best valuable comparator as a reference. Interobserver and interprotocol agreement was assessed by using κ statistics. Results Contrast-to-noise ratio was significantly higher on the alternative protocol images than on the standard protocol images (181.1 [95% confidence interval: 140.4, 221.7] vs 84.7 [95% confidence interval: 66.3, 103.1] respectively; P < .001). Diagnostic performance was not significantly inferior with the alternative protocol than with the standard protocol for both readers in a per-patient analysis (sensitivity, 97.9%-98.9% vs 93.6%-97.9%; specificity, 85.2%-92.6% vs 92.6%-96.3%; area under the curve, 0.92-0.96 vs 0.95, respectively; all P ≤ .02) and a per-spine level analysis (all P < .01). Interobserver and interprotocol agreement was good to very good (κ = 0.70-0.81). Conclusion Dixon T2-weighted fat-only and water-only imaging provide, in one sequence, diagnostic performance similar to that of the standard combination of morphologic sequences for the detection of probable spinal bone metastases, thereby providing an opportunity to reduce imaging time by eliminating the need to perform T1 sequences. RSNA, 2017 An earlier incorrect version of this article appeared online. This article was corrected on November 6, 2017.

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Section: Patient Populationmentioning

confidence: 99%

Bone Marrow Metastases: T2-weighted Dixon Spin-Echo Fat Images Can Replace T1-weighted Spin-Echo Images

et al. 2018

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“…As radiology departments attempt to scan more patients in less time, sequence optimisation becomes critical, and DIXON‐based approaches are potentially very useful in this regard. In the 2016 paper by Park et al, a comparison of signal to noise resolution (SNR) and contrast to noise resolution (CNR), image sharpness, fat suppression and soft tissue (cartilage/ligament/menisci) interrogation between standard SE acquisitions using a 3‐point Dixon (mDIXON) method was undertaken. The authors found no significant difference in sensitivity, specificity and accuracy between the DIXON sequence and standard T2 SE sequences in regard to diagnostic performance.…”

Section: Discussionmentioning

confidence: 99%

A quality audit of MRI knee exams with the implementation of a novel 2‐point DIXON sequence

Bastian-Jordan

Dhupelia

McMeniman³

et al. 2019

J of Medical Radiation Sci

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Introduction The objective of this study was to evaluate the effect on diagnostic image quality and acquisition time utilising a DIXON sequence to replace two standard proton density (PD) fat saturation (FS) sequences in routine magnetic resonance (MR) evaluation of the knee. Methods Thirty‐one consecutive patients referred for an MR examination of the knee were examined using the routine departmental protocol along with the addition of a DIXON sequence. The sequences were all evaluated by a senior radiologist and feedback provided via both written and scored responses. The sequences were then repackaged for two additional reviewers with the sagittal PD FS (Chemical Shift Selective Fat Saturation or CHESS) and sagittal PD removed and replaced with the DIXON (fat suppressed and in‐phase, respectively) sequence equivalents. Scored and written responses were tabled and reviewed to assess the suitability of sequence replacement. Results The DIXON‐based images were judged as being comparable replacements for the sagittal PD fat sat and PD sequences. There was no report of any loss in diagnostic confidence across the 31 patients (total of 32 knees) with a time saving of just over 10% gained. The most common issues raised affecting image quality, though not affecting diagnostic attributes, were patient motion and a minor chemical shift artefact. Conclusion The use of the DIXON technique in place of the PD sequences was of equivalent diagnostic quality with’good’ to ‘outstanding’ fat suppression observed for the majority of cases using the DIXON sequence with an incremental time saving obtained.

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“…Finally, DIXON provides quantitative parameters about water and fat content of bone marrow and other tissues, including the percentage of signal loss between in phase and opposed phase images (fat fraction), which may provide potential biomarkers for treatment monitoring of arthritis[ 12 , 16 ]. Water only GE T1-weighted images provide high quality fat-suppression, which can be especially useful in dynamic postcontrast series or high-resolution late post-contrast studies, thereby improving the detection of subtle areas of enhancement[ 17 ].…”

Section: Advanced Mri Sequences For Arthritis Evaluationmentioning

confidence: 99%

Clinical applications of advanced magnetic resonance imaging techniques for arthritis evaluation

Noguerol¹,

Luna²,

Cabrera³

et al. 2017

WJO

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Magnetic resonance imaging (MRI) has allowed a comprehensive evaluation of articular disease, increasing the detection of early cartilage involvement, bone erosions, and edema in soft tissue and bone marrow compared to other imaging techniques. In the era of functional imaging, new advanced MRI sequences are being successfully applied for articular evaluation in cases of inflammatory, infectious, and degenerative arthropathies. Diffusion weighted imaging, new fat suppression techniques such as DIXON, dynamic contrast enhanced-MRI, and specific T2 mapping cartilage sequences allow a better understanding of the physiopathological processes that underlie these different arthropathies. They provide valuable quantitative information that aids in their differentiation and can be used as potential biomarkers of articular disease course and treatment response.

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Usefulness of the fast spin-echo three-point Dixon (mDixon) image of the knee joint on 3.0-T MRI: comparison with conventional fast spin-echoT₂weighted image

Abstract: FULL PAPERUsefulness of the fast spin-echo three-point Dixon (mDixon) image of the knee joint on 3.0-T MRI: comparison with conventional fast spin-echo T 2 weighted image 1

Cited by 21 publications

References 20 publications

Bone Marrow Metastases: T2-weighted Dixon Spin-Echo Fat Images Can Replace T1-weighted Spin-Echo Images

Bone Marrow Metastases: T2-weighted Dixon Spin-Echo Fat Images Can Replace T1-weighted Spin-Echo Images

A quality audit of MRI knee exams with the implementation of a novel 2‐point DIXON sequence

Clinical applications of advanced magnetic resonance imaging techniques for arthritis evaluation

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Usefulness of the fast spin-echo three-point Dixon (mDixon) image of the knee joint on 3.0-T MRI: comparison with conventional fast spin-echoT2weighted image

Abstract: FULL PAPERUsefulness of the fast spin-echo three-point Dixon (mDixon) image of the knee joint on 3.0-T MRI: comparison with conventional fast spin-echo T 2 weighted image 1

Cited by 21 publications

References 20 publications

Bone Marrow Metastases: T2-weighted Dixon Spin-Echo Fat Images Can Replace T1-weighted Spin-Echo Images

Bone Marrow Metastases: T2-weighted Dixon Spin-Echo Fat Images Can Replace T1-weighted Spin-Echo Images

A quality audit of MRI knee exams with the implementation of a novel 2‐point DIXON sequence

Clinical applications of advanced magnetic resonance imaging techniques for arthritis evaluation

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Usefulness of the fast spin-echo three-point Dixon (mDixon) image of the knee joint on 3.0-T MRI: comparison with conventional fast spin-echoT₂weighted image