Assessment of the Quality of Breast MR Imaging Using the Modified Dixon Method and Frequency-Selective Fat Suppression: A Phantom Study

Takatsu, Yasuo; Kyotani, Katsusuke; Ueyama, Takeshi; Miyati, Tosiaki; Yamamura, Kenichiro; Andou, Atsushi

doi:10.2463/mrms.tn.2017-0144

magn reson med sci

2018

DOI: 10.2463/mrms.tn.2017-0144

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Assessment of the Quality of Breast MR Imaging Using the Modified Dixon Method and Frequency-Selective Fat Suppression: A Phantom Study

Yasuo Takatsu

Katsusuke Kyotani

Takeshi Ueyama

et al.

Abstract: To obtain objective and concrete data by physically assessing the quality of breast magnetic resonance images based on the fat-suppression effect by the modified Dixon method (mDixon) and frequency-selective fat suppression (e-Thrive) using an original lipid-content breast phantom that could easily reveal the influence of non-uniform fat suppression in breast magnetic resonance imaging. The fat-suppression uniformity was approximately seven times superior when using mDixon compared with when using e-Thrive. mD… Show more

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Cited by 8 publications

References 11 publications

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Effect of Phase Encoding Direction on Image Quality in Single‐Shot EPI Diffusion‐Weighted Imaging of the Breast

Rodríguez‐Soto,

Zou,

Loubrie

et al. 2024

Magnetic Resonance Imaging

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BackgroundIn breast diffusion‐weighted imaging (DWI), distortion and physiologic artifacts affect clinical interpretation. Image quality can be optimized by addressing the effect of phase encoding (PE) direction on these artifacts.PurposeTo compare distortion artifacts in breast DWI acquired with different PE directions and polarities, and to discuss their clinical implications.Study TypeProspective.PopulationEleven healthy volunteers (median age: 47 years old; range: 22–74 years old) and a breast phantom.Field Strength/SequenceSingle‐shot echo planar DWI and three‐dimensional fast gradient echo sequences at 3 T.AssessmentAll DWI data were acquired with left–right, right–left, posterior–anterior, and anterior–posterior PE directions. In phantom data, displacement magnitude was evaluated by comparing the location of landmarks in anatomical and DWI images. Three breast radiologists (5, 17, and 23 years of experience) assessed the presence or absence of physiologic artifacts in volunteers' DWI datasets and indicated their PE‐direction preference.Statistical TestsAnalysis of variance with post‐hoc tests were used to assess differences in displacement magnitude across DWI datasets and observers. A binomial test and a chi‐squared test were used to evaluate if each in vivo DWI dataset had an equal probability (25%) of being preferred by radiologists. Inter‐reader agreement was evaluated using Gwet's AC1 agreement coefficient. A P‐value <0.05 was considered statistically significant.ResultsIn the phantom study, median displacement was the significantly largest in posterior–anterior data. While the displacement in the anterior–posterior and left–right data were equivalent (P = 0.545). In the in vivo data, there were no physiological artifacts observed in any dataset, regardless of PE direction. In the reader study, there was a significant preference for the posterior–anterior datasets which were selected 94% of the time. There was good agreement between readers (0.936).Data ConclusionThis study showed the impact of PE direction on distortion artifacts in breast DWI. In healthy volunteers, the posterior‐to‐anterior PE direction was preferred by readers.Level of Evidence2Technical EfficacyStage 1

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Effect of Phase Encoding Direction on Image Quality in Single‐Shot EPI Diffusion‐Weighted Imaging of the Breast

Rodríguez‐Soto,

Zou,

Loubrie

et al. 2024

Magnetic Resonance Imaging

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show abstract

A mask method to assess the uniformity of fat suppression in phantom studies

Takatsu

Nakamura

Yamamura

et al. 2019

Radiol Phys Technol

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Novel distortion correction method for diffusion-weighted imaging based on non-rigid image registration between low b value image and anatomical image

Takatsu

Sagawa

Nakamura

et al. 2019

Magnetic Resonance Imaging

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Assessment of the Quality of Breast MR Imaging Using the Modified Dixon Method and Frequency-Selective Fat Suppression: A Phantom Study

Cited by 8 publications

References 11 publications

Effect of Phase Encoding Direction on Image Quality in Single‐Shot EPI Diffusion‐Weighted Imaging of the Breast

Effect of Phase Encoding Direction on Image Quality in Single‐Shot EPI Diffusion‐Weighted Imaging of the Breast

A mask method to assess the uniformity of fat suppression in phantom studies

Novel distortion correction method for diffusion-weighted imaging based on non-rigid image registration between low b value image and anatomical image

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