A Comparison between Different Imaging Strategies for Diffusion Measurements with the Centric Phase-Encoded TurboFLASH Sequence

Coremans, Jean; Spanoghe, M.; Budinský, Luboš; Sterckx, J.; Luypaert, Robert; Eisendrath, Henri; Osteaux, M

doi:10.1006/jmre.1996.1025

Cited by 30 publications

(48 citation statements)

References 6 publications

(17 reference statements)

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“…To eliminate T1 effects in the acquired signal by TFE, we used a phase-cycling scheme. 16,17 The imaging parameters for the DSDE-TFE were as follows: TR/TE ϭ 6.2/3 ms, flip angle ϭ 10°, echo-train length ϭ 75, b factors ϭ 0, 500 s/mm 2 , sensitivity-encoding factor ϭ 2, FOV ϭ 240 mm, voxel size ϭ 1.5 ϫ 1.5 ϫ 1.5 mm 3 , number of signal averages ϭ 2, and acquisition time ϭ 5 minutes 22 seconds. The imaging parameters for the EP-DWI were as follows: TR/TE ϭ 3000/62 ms, b factors ϭ 0, 500 s/mm 2 (anteroposterior direction), sensitivity encoding factor ϭ 2.5, FOV ϭ 240 mm, matrix ϭ 160 ϫ 128, section thickness/gap ϭ 3/0 mm, voxel size ϭ 1.5 ϫ 1.9 ϫ 3 mm 3 , number of signal averages ϭ 2, and acquisition time ϭ 48 seconds.…”

Section: Imaging Techniquementioning

confidence: 99%

Evaluation of Diffusivity in the Anterior Lobe of the Pituitary Gland: 3D Turbo Field Echo with Diffusion-Sensitized Driven-Equilibrium Preparation

Hiwatashi¹,

Yamada²,

Togao

et al. 2013

AJNR Am J Neuroradiol

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BACKGROUND AND PURPOSE: 3D turbo field echo with diffusion-sensitized driven-equilibrium preparation is a non-echo-planar technique for DWI, which enables high-resolution DWI without field inhomogeneity-related image distortion. The purpose of this study was to evaluate the feasibility of diffusion-sensitized driven-equilibrium turbo field echo in evaluating diffusivity in the normal pituitary gland.

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Section: Imaging Techniquementioning

confidence: 99%

Evaluation of Diffusivity in the Anterior Lobe of the Pituitary Gland: 3D Turbo Field Echo with Diffusion-Sensitized Driven-Equilibrium Preparation

Hiwatashi¹,

Yamada²,

Togao

et al. 2013

AJNR Am J Neuroradiol

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“…Low b-values and the unidirectional diffusion weighting are technical limitations of this study. We were able to obtain DW images with DSDE-TFE with b-values .500 s mm 22 , but it was sometimes difficult to obtain ADC maps, probably owing to insufficient eddy current corrections. In addition, we are trying to apply diffusion weighting in more than three directions.…”

Section: Discussionmentioning

confidence: 99%

“…22,23 For the DSDE-TFE, motion-probing gradients were used in one direction with b-values of 0 and 500 s mm 22 Axial T 1 weighted images, T 2 weighted images with fat suppression and post-contrast T 1 weighted images with fat suppression were also obtained. The contrast material was injected at 0.1 mmol kg 21 [gadopentetate dimeglumine (Magnevist®; Bayer, Osaka, Japan), gadodiamide (Omniscan; Daiichi Sankyo, Tokyo, Japan) or gadoteridol (Prohance®; Eisai, Tokyo, Japan)].…”

Section: Imaging Techniquementioning

confidence: 99%

3D turbo field echo with diffusion-sensitized driven-equilibrium preparation technique (DSDE-TFE) versus echo planar imaging in evaluation of diffusivity of retinoblastoma

Hiwatashi¹,

Togao²,

Yamashita³

et al. 2016

BJR

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Makoto Obara is an employee of Philips Electronics Japan. He was not involved in data analysis in this study.Objective: Compared with echoplanar (EP) diffusionweighted imaging (DWI), three-dimensional (3D) turbo field echo with diffusion-sensitized driven-equilibrium (DSDE-TFE) preparation DWI obtains images with higher spatial resolution and less susceptibility artefacts. The purpose of this study was to evaluate the feasibility of DSDE-TFE to visualize retinoblastomas compared with EP imaging. Methods: This retrospective study was approved by our institutional review boards. Eight patients with retinoblastomas (five males and three females; age range 0-87 months; median 21 months) were studied. For the DSDE-TFE, motion-probing gradients (MPGs) were conducted at one direction with b-values of 0 and 500 s mm 22 and a voxel size of 1.5 3 1.5 3 1.5 mm 3 . For the EP imaging, MPGs were conducted at three directions with b-values of 0 and 1000 s mm 22 and a voxel size of 1.4 3 1.8 3 3 mm 3 . The apparent diffusion coefficients (ADCs) of each lesion were measured. Statistical analyses were performed with Pearson R and linear correlation coefficients. Results: Intraocular lesions were clearly visualized on the DSDE-TFE without obvious geometrical distortion, whereas all showed deformity on EP images. On the DSDE-TFE, the ADCs of the lesions ranged from 0.83 3 10 23 to 2.93 3 10 23 mm 2 s 21 (mean 6 standard deviation 1.73 6 0.73 3 10 23 mm 2 s 21 ). On the EP images, the ADCs ranged from 0.53 3 10 23 to 2.03 3 10 23 mm 2 s 21 (0.93 6 0.53 3 10 23 mm 2 s 21 ). There was a significant correlation in ADC measurement between the DSDE-TFE and EP imaging (r 5 0.81, p , 0.05). Conclusion: With its insensitivity to field inhomogeneity and high spatial resolution, the 3D DSDE-TFE technique enabled us to assess diffusivity in retinoblastomas. Advances in knowledge: DSDE-TFE could enable us to assess the ADC of retinoblastomas without obvious geometrical distortion.

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“…To simulate the effect of the crusher gradients in Methods 3 and 4, Eqs. [2] and [3] were modified to eliminate the relaxed component and to take account of the factor of 2 reduction in SNR due to the stimulated echo mechanism, so that [9] and…”

Section: Simulationsmentioning

confidence: 99%

“…However, it should be noted that these effects will be important in the measurement of other parameters using snapshot FLASH, such as T 1 values and diffusion coefficients. A closely related approach has recently been published by Coremans et al in the context of diffusion-weighted snapshot FLASH imaging (9).…”

Section: Introductionmentioning

confidence: 99%

Sources of artifact and systematic error in quantitative snapshot FLASH imaging and methods for their elimination

Williams

Redpath

1999

Magn. Reson. Med.

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A Comparison between Different Imaging Strategies for Diffusion Measurements with the Centric Phase-Encoded TurboFLASH Sequence

Cited by 30 publications

References 6 publications

Evaluation of Diffusivity in the Anterior Lobe of the Pituitary Gland: 3D Turbo Field Echo with Diffusion-Sensitized Driven-Equilibrium Preparation

Evaluation of Diffusivity in the Anterior Lobe of the Pituitary Gland: 3D Turbo Field Echo with Diffusion-Sensitized Driven-Equilibrium Preparation

3D turbo field echo with diffusion-sensitized driven-equilibrium preparation technique (DSDE-TFE) versus echo planar imaging in evaluation of diffusivity of retinoblastoma

Sources of artifact and systematic error in quantitative snapshot FLASH imaging and methods for their elimination

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