Fast and ultrafast non-echo-planar MR imaging techniques

Wr, Nitz

doi:10.1007/s00330-002-1428-9

Cited by 86 publications

(38 citation statements)

References 69 publications

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“…Hardware improvements in conjunction with the development of various imaging techniques have contributed to in-crease acquisition speeds during the past decades. [2][3][4] One of the advancements in magnetic resonance (MR) technology is the implementation of parallel imaging which utilizes information obtained from phased-array coils with different sensitivities, enabling reduction of phase encoding steps through increased spacing between k-space lines. [5][6][7] However, the effective application of higher acceleration factors in parallel imaging has to be balanced with the reduction of signal to noise ratio (SNR).…”

Section: Introductionmentioning

confidence: 99%

Ultrafast Brain MRI: Clinical Deployment and Comparison to Conventional Brain MRI at 3T

Prakkamakul

Witzel

Huang

et al. 2016

Journal of Neuroimaging

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Section: Introductionmentioning

confidence: 99%

Ultrafast Brain MRI: Clinical Deployment and Comparison to Conventional Brain MRI at 3T

Prakkamakul

Witzel

Huang

et al. 2016

Journal of Neuroimaging

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“…TSE generates a train of spin echoes after a single excitation and uses each echo to sample one line in k-space. There are many ways to study and accelerate TSE MR imaging (2)(3)(4)(5)(6)(7)(8)(9)(10)(11)(12)(13). TSE typically shortens scan times by factors of 2 to 32 directly dependent upon the number of echoes in the echo train.…”

Section: Introductionmentioning

confidence: 99%

Experimental O‐space turbo spin echo imaging

Wang

Tam

Kopanoğlu

et al. 2015

Magnetic Resonance in Med

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Purpose Turbo Spin Echo (TSE) imaging reduces imaging time by acquiring multiple echoes per repetition (TR), requiring fewer TRs. O-Space also can require fewer TRs by using a combination of nonlinear magnetic gradient fields and surface coil arrays. Although to date, O-Space has only been demonstrated for gradient echo imaging, it’s valuable to combine these two techniques. However, collecting multiple O-Space echoes per TR is difficult because of the different local k-space trajectories and variable T2-weighting. Theory and Methods A practical scheme is demonstrated to combine the benefits of TSE and O-Space for highly accelerated T2-weighted images. The scheme uses a modified acquisition order and filtered projection reconstruction to reduce artifacts caused by T2-decay, while retaining T2 contrast that corresponds to a specific echo time. Results The experiments illustrate the proposed method can produce highly accelerated T2-weighted images. Moreover, the proposed method can generate multiple images with different T2 contrasts from a single dataset. Conclusions The proposed O-Space TSE imaging method requires fewer echoes than conventional TSE and fewer repetitions than conventional O-Space imaging. It retains resilience to undersampling, clearly outperforming Cartesian SENSE at high levels of undersampling, and can generate undistorted images with a range of T2 contrast from a single acquired dataset.

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“…Given the generally long T 1 relaxation time of lowmolecular-weight fluorinated compounds (19,20), fast imaging sequences (21) are useful for 19 F-MRI, in order to increase the number of averages and hence the SNR. An efficient k-space sampling strategy (22) can add further improvement.…”

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confidence: 99%

Optimization of rapid acquisition with relaxation enhancement (RARE) pulse sequence parameters for ¹⁹F‐MRI studies

Mastropietro

Bernardi

Breschi

et al. 2013

Magnetic Resonance Imaging

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Fast and ultrafast non-echo-planar MR imaging techniques

Cited by 86 publications

References 69 publications

Ultrafast Brain MRI: Clinical Deployment and Comparison to Conventional Brain MRI at 3T

Ultrafast Brain MRI: Clinical Deployment and Comparison to Conventional Brain MRI at 3T

Experimental O‐space turbo spin echo imaging

Optimization of rapid acquisition with relaxation enhancement (RARE) pulse sequence parameters for ¹⁹F‐MRI studies

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Fast and ultrafast non-echo-planar MR imaging techniques

Cited by 86 publications

References 69 publications

Ultrafast Brain MRI: Clinical Deployment and Comparison to Conventional Brain MRI at 3T

Ultrafast Brain MRI: Clinical Deployment and Comparison to Conventional Brain MRI at 3T

Experimental O‐space turbo spin echo imaging

Optimization of rapid acquisition with relaxation enhancement (RARE) pulse sequence parameters for 19F‐MRI studies

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Optimization of rapid acquisition with relaxation enhancement (RARE) pulse sequence parameters for ¹⁹F‐MRI studies