Mono-exponential and bi-exponential model-based diffusion-weighted MR imaging and IDEAL-IQ sequence for quantitative evaluation of sacroiliitis in patients with ankylosing spondylitis

2018 ◽  
Vol 37 (11) ◽  
pp. 3069-3076 ◽  
Author(s):  
Cui Ren ◽  
Qiao Zhu ◽  
Huishu Yuan
Keyword(s):  
Ankylosing Spondylitis ◽  
Mr Imaging ◽  
Quantitative Evaluation ◽  
Exponential Model ◽  
Model Based ◽  
Diffusion Weighted

Grading meningiomas using mono-exponential, bi-exponential and stretched exponential model-based diffusion-weighted MR imaging

2019 ◽  
Vol 74 (8) ◽  
pp. 651.e15-651.e23 ◽  
Author(s):  
L. Lin ◽  
Y. Xue ◽  
Q. Duan ◽  
X. Chen ◽  
H. Chen ◽  
...  
Keyword(s):  
Mr Imaging ◽  
Exponential Model ◽  
Stretched Exponential ◽  
Model Based ◽  
Diffusion Weighted ◽  
Stretched Exponential Model

Quantitative evaluation of brainstem involvement in multiple system atrophy by diffusion-weighted MR imaging

2004 ◽  
Vol 251 (9) ◽  
Author(s):  
Masato Kanazawa ◽  
Takayoshi Shimohata ◽  
Kenshi Terajima ◽  
Osamu Onodera ◽  
Keiko Tanaka ◽  
...  
Keyword(s):  
Mr Imaging ◽  
Multiple System Atrophy ◽  
Quantitative Evaluation ◽  
Diffusion Weighted

scholarly journals Assessment of Correlation between Intravoxel Incoherent Motion Diffusion Weighted MR Imaging and Dynamic Contrast-Enhanced MR Imaging of Sacroiliitis with Ankylosing Spondylitis

2017 ◽  
Vol 2017 ◽  
pp. 1-9
Author(s):  
Yinghua Zhao ◽  
Qun Zhang ◽  
Wei Li ◽  
Yanqiu Feng ◽  
Yihao Guo ◽  
...  
Keyword(s):  
Ankylosing Spondylitis ◽  
Mr Imaging ◽  
Molecular Diffusion ◽  
Critical Role ◽  
Intravoxel Incoherent Motion ◽  
Maximum Enhancement ◽  
Dce Mri ◽  
Dynamic Contrast Enhanced ◽  
Diffusion Weighted ◽  
Contrast Enhanced

The relationships between IVIM and DCE-MRI parameters in AS are not clear. We explore the correlation between intravoxel incoherent motion (IVIM) diffusion weighted imaging (DWI) and dynamic contrast-enhanced (DCE) parameters obtained on MR images in patients with ankylosing spondylitis (AS). Forty-four patients with AS were prospectively examined using a 1.5-T MR system. IVIM DWI was performed with 11 b values (range, 0–800 s/mm2) for all patients. The correlation coefficients between IVIM and DCE-MRI parameters were analyzed using Spearman’s method. Our results showed that intra- and interobserver reproducibility were excellent to relatively good (ICC = 0.804–0.981; narrow width of 95% limits of agreement). Moderate positive correlations were observed between pure molecular diffusion (Ds) and maximum enhancement (ME) and relative enhancement (RE) (r = 0.700, P<0.001; r=0.607, P < 0.001, resp.). Perfusion-related diffusion (Df) showed negative moderate correlation with ME (r = -0.608, P < 0.001). However, no correlation was observed between perfusion fraction (f) and any parameters of ME, RE, TTP, and BE (r = −0.093–0.213; P > 0.165). In conclusion, the IVIM parameters, especially f, might play a critical role in detecting the progression of AS, because it can provide more perfusion information compared with DCE-MRI; besides the IVIM MRI is a noninvasive method.

scholarly journals Whole-Body PET/MR Imaging: Quantitative Evaluation of a Novel Model-Based MR Attenuation Correction Method Including Bone

2015 ◽  
Vol 56 (7) ◽  
pp. 1061-1066 ◽  
Author(s):  
D. H. Paulus ◽  
H. H. Quick ◽  
C. Geppert ◽  
M. Fenchel ◽  
Y. Zhan ◽  
...  
Keyword(s):  
Mr Imaging ◽  
Attenuation Correction ◽  
Quantitative Evaluation ◽  
Correction Method ◽  
Whole Body ◽  
Model Based ◽  
Novel Model

Intrahepatic and hilar mass-forming cholangiocarcinoma: Qualitative and quantitative evaluation with diffusion-weighted MR imaging

2015 ◽  
Vol 84 (8) ◽  
pp. 1444-1451 ◽  
Author(s):  
Hassan El Fattach ◽  
Anthony Dohan ◽  
Youcef Guerrache ◽  
Raphael Dautry ◽  
Mourad Boudiaf ◽  
...  
Keyword(s):  
Mr Imaging ◽  
Quantitative Evaluation ◽  
Qualitative And Quantitative ◽  
Diffusion Weighted

Quantitative evaluation of brain involvement in ataxia telangiectasia by diffusion weighted MR imaging

2005 ◽  
Vol 56 (2) ◽  
pp. 192-196 ◽  
Author(s):  
Ahmet Kemal Fırat ◽  
Hakkı Muammer Karakaş ◽  
Yezdan Fırat ◽  
Cengiz Yakıncı
Keyword(s):  
Mr Imaging ◽  
Quantitative Evaluation ◽  
Ataxia Telangiectasia ◽  
Diffusion Weighted ◽  
Brain Involvement
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