کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
9953834 | 1524989 | 2018 | 46 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Development of a robust diffusion-MR elastography (dMRE) technique to mitigate intravoxel phase dispersion
دانلود مقاله + سفارش ترجمه
دانلود مقاله ISI انگلیسی
رایگان برای ایرانیان
کلمات کلیدی
SNRLFEQSIPNRMREmpMRIDTIMADIVPDDSGROIADCMSGDFT - DFTMulti-parametric MRI - MRI چند پارامتریQuantitative MRI - MRI کمیSpin echo - اسپین اسپینMRI - امآرآی یا تصویرسازی تشدید مغناطیسیstandard deviation - انحراف معیارMagnetic resonance elastography - انعطاف پذیری رزونانس مغناطیسیAlzheimer's disease - بیماری آلزایمرDiscrete Fourier transformation - تحول فوریه گسستهQ-space imaging - تصویربرداری Q-spacediffusion tensor imaging - تصویربرداری تانسور انتشارMagnetic resonance imaging - تصویربرداری رزونانس مغناطیسیStiffness - سفتیapparent diffusion coefficient - ضریب انتشار آشکارshear modulus - مدول برشیregion of interest - منطقه مورد نظرSignal-to-noise ratio - نسبت سیگنال به نویزHARDI - هاردیDiffusion - واپخش یا انتشار
موضوعات مرتبط
مهندسی و علوم پایه
فیزیک و نجوم
فیزیک ماده چگال
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
Diffusion-magnetic resonance elastography (dMRE) is an emerging practical technique that can acquire diffusion magnetic resonance imaging and MRE simultaneously. However, a signal loss attributable to intravoxel phase dispersion (IVPD) interferes with the calculation of the apparent diffusion coefficient (ADC). This study presents an approach to dMRE that reduces the influence of IVPD by introducing a new pulse sequence. The existing and proposed techniques were performed using a phantom comprising five rods with different elasticities at 60â¯Hz vibration to investigate the accuracy of previous and proposed dMRE techniques. The measures of ADC and stiffness, obtained by using both dMRE techniques, were compared with conventional spin-echo (SE) diffusion and SE-MRE. Then, we evaluated those differences by using the mean of absolute differences (MAD) in each rod within the phantom. The results of the MAD of the stiffness from both dMRE techniques showed almost no difference. In contrast, the value of the ADC MAD (MADâ¯ââ¯0.16â¯Ãâ¯10â3â¯mm2/s), obtained in the soft region within the phantom with the previous dMRE technique, was large. This value was about 2.7 times that of the value produced by the proposed dMRE technique. This difference must reflect the degree of influence of IVPD in both techniques. These results demonstrate that our dMRE technique is a robust method for addressing the signal loss attributable to IVPD.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Magnetic Resonance Imaging - Volume 54, December 2018, Pages 160-170
Journal: Magnetic Resonance Imaging - Volume 54, December 2018, Pages 160-170
نویسندگان
Daiki Ito, Tomokazu Numano, Kazuyuki Mizuhara, Toshikatsu Washio, Masaki Misawa, Naotaka Nitta,