Characterization of Effects of Compressed Sensing on High Spectral and Spatial Resolution (HiSS) MRI with Comparison to SENSE.
Characterization of Effects of Compressed Sensing on High Spectral and Spatial Resolution (HiSS) MRI with Comparison to SENSE.
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DOI：
10.3390/tomography9020055
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发表时间：
2023-03-19
期刊：
影响因子：
--
通讯作者：
Karczmar GS
中科院分区：
文献类型：
--
作者：
Medved M;Vicari M;Karczmar GS
高光谱和空间分辨率（HiSS） MRI在乳腺中具有很高的诊断价值。基于k空间欠采样的加速方法可以实现更强的基于T2*的图像对比度和/或更高的光谱分辨率，从而潜在地提高诊断性能。制备了琼脂/油幻影，其水-脂边界垂直于乳腺线圈中的读出和相位编码方向。在3T，灵敏度编码（SENSE）加速度因子R为10时获取HiSS MRI，并使用R = 1数据集模拟相应的压缩感知（CS）加速度。通过量化噪声和伪影水平来评估图像质量。通过调制传递函数分析确定有效空间分辨率。色散与吸收（DISPA）分析和半最大值全宽度（FWHM）量化了谱线形状的变化。CS的噪音水平在R时保持不变，但在SENSE时放大。SENSE保留了HiSS MRI的空间分辨率，而CS在相位编码方向上降低了HiSS MRI的空间分辨率。SENSE对FWHM和DISPA标记没有影响，而CS则增加了FWHM。因此，CS可能在噪声限制或几何限制的应用中表现更好，但在乳腺MRI特定的几何配置中，频谱分析可能会受到损害，从而降低HiSS MRI的诊断性能。
High Spectral and Spatial resolution (HiSS) MRI shows high diagnostic performance in the breast. Acceleration methods based on k-space undersampling could allow stronger T2*-based image contrast and/or higher spectral resolution, potentially increasing diagnostic performance. An agar/oil phantom was prepared with water-fat boundaries perpendicular to the readout and phase encoding directions in a breast coil. HiSS MRI was acquired at 3T, at sensitivity encoding (SENSE) acceleration factors R of up to 10, and the R = 1 dataset was used to simulate corresponding compressed sensing (CS) accelerations. Image quality was evaluated by quantifying noise and artifact levels. Effective spatial resolution was determined via modulation transfer function analysis. Dispersion vs. absorption (DISPA) analysis and full width at half maximum (FWHM) quantified spectral lineshape changes. Noise levels remained constant with R for CS but amplified with SENSE. SENSE preserved the spatial resolution of HiSS MRI, while CS reduced it in the phase encoding direction. SENSE showed no effect on FWHM or DISPA markers, while CS increased FWHM. Thus, CS might perform better in noise-limited or geometrically constrained applications, but in geometric configurations specific to breast MRI, spectral analysis might be compromised, decreasing the diagnostic performance of HiSS MRI.
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影响因子：
5.9
作者：
Kim, Jin Joo;Kim, Jin You
通讯作者：
Kim, Jin You
DOI：
10.1016/0169-7439(88)80027-3
发表时间：
1988-06-01
影响因子：
3.9
作者：
MARSHALL, AG
通讯作者：
MARSHALL, AG
影响因子：
3.3
作者：
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通讯作者：
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影响因子：
19.7
作者：
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通讯作者：
Karczmar, GS
影响因子：
5
作者：
Medved, M;Newstead, GM;Karczmar, GS
通讯作者：
Karczmar, GS