scholarly journals Compared with the Conventional MR Imaging, Do the Constructive Interference Steady State Sequence and Diffusion Weighted Imaging Aid in the Diagnosis of Lumbar Disc Hernias?

2011 ◽  
Vol 42 (3) ◽  
pp. 152-161 ◽  
Author(s):  
Hasan Aydin ◽  
Volkan Kizilgoz ◽  
Baki Hekimoglu
Keyword(s):  
Steady State ◽  
Mr Imaging ◽  
Diffusion Weighted Imaging ◽  
Lumbar Disc ◽  
Constructive Interference ◽  
State Sequence ◽  
Diffusion Weighted ◽  
And Diffusion

scholarly journals Evaluation of primary adnexal masses by 3T MRI: categorization with conventional MR imaging and diffusion-weighted imaging

2012 ◽  
Vol 5 (1) ◽  
pp. 33 ◽  
Author(s):  
He Zhang ◽  
Guo-Fu Zhang ◽  
Zhi-Yan He ◽  
Zheng-Yu Li ◽  
Ming Zhu ◽  
...  
Keyword(s):  
Mr Imaging ◽  
Diffusion Weighted Imaging ◽  
Adnexal Masses ◽  
3T Mri ◽  
Diffusion Weighted ◽  
And Diffusion

scholarly journals Diffusion-Weighted Imaging and Diffusion Tensor Imaging of Asymptomatic Lumbar Disc Herniation

2000 ◽  
Vol 40 (1.2) ◽  
pp. 197-203
Author(s):  
Toshinori Sakai ◽  
Ryo Miyagi ◽  
Eiko Yamabe ◽  
Yasunari Fujinaga ◽  
Nitin N. Bhatia ◽  
...  
Keyword(s):  
Diffusion Tensor Imaging ◽  
Lumbar Disc Herniation ◽  
Disc Herniation ◽  
Diffusion Weighted Imaging ◽  
Diffusion Tensor ◽  
Lumbar Disc ◽  
Diffusion Weighted ◽  
And Diffusion

scholarly journals Tracking accuracy of T2- and diffusion-weighted magnetic resonance imaging for infusate distribution by convection-enhanced delivery

2011 ◽  
Vol 115 (3) ◽  
pp. 474-480 ◽  
Author(s):  
Rajiv R. Iyer ◽  
John A. Butman ◽  
Stuart Walbridge ◽  
Neville D. Gai ◽  
John D. Heiss ◽  
...  
Keyword(s):  
Mr Imaging ◽  
Diffusion Weighted Imaging ◽  
Nonhuman Primates ◽  
Drug Distribution ◽  
Imaging Analysis ◽  
Tracking Accuracy ◽  
Convection Enhanced Delivery ◽  
Diffusion Weighted ◽  
Mean Differences ◽  
And Diffusion

Object Because convection-enhanced delivery relies on bulk flow of fluid in the interstitial spaces, MR imaging techniques that detect extracellular fluid and fluid movement may be useful for tracking convective drug distribution. To determine the tracking accuracy of T2-weighted and diffusion-weighted MR imaging sequences, the authors followed convective distribution of radiolabeled compounds using these imaging sequences in nonhuman primates. Methods Three nonhuman primates underwent thalamic convective infusions (5 infusions) with 14C-sucrose (MW 342 D) or 14C-dextran (MW 70,000 D) during serial MR imaging (T2- and diffusion-weighted imaging). Imaging, histological, and autoradiographic findings were analyzed. Results Real-time T2- and diffusion-weighted imaging clearly demonstrated the region of infusion, and serial images revealed progressive filling of the bilateral thalami during infusion. Imaging analysis for T2- and diffusion-weighted sequences revealed that the tissue volume of distribution (Vd) increased linearly with volume of infusion (Vi; R2 = 0.94, R2 = 0.91). Magnetic resonance imaging analysis demonstrated that the mean ± SD Vd/Vi ratios for T2-weighted (3.6 ± 0.5) and diffusion-weighted (3.3 ± 0.4) imaging were similar (p = 0.5). While 14C-sucrose and 14C-dextran were homogeneously distributed over the infused region, autoradiographic analysis revealed that T2-weighted and diffusion-weighted imaging significantly underestimated the Vd of both 14C-sucrose (mean differences 51.3% and 52.3%, respectively; p = 0.02) and 14C-dextran (mean differences 49.3% and 59.6%; respectively, p = 0.001). Conclusions Real-time T2- and diffusion-weighted MR imaging significantly underestimate tissue Vd during convection-enhanced delivery over a wide range of molecular sizes. Application of these imaging modalities may lead to inaccurate estimation of convective drug distribution.

scholarly journals Diffusion-Weighted Imaging and Diffusion Tensor Imaging of Asymptomatic Lumbar Disc Herniation

2014 ◽  
Vol 61 (1.2) ◽  
pp. 197-203 ◽  
Author(s):  
Toshinori Sakai ◽  
Ryo Miyagi ◽  
Eiko Yamabe ◽  
Yasunari Fujinaga ◽  
Nitin N. Bhatia ◽  
...  
Keyword(s):  
Diffusion Tensor Imaging ◽  
Lumbar Disc Herniation ◽  
Disc Herniation ◽  
Diffusion Weighted Imaging ◽  
Diffusion Tensor ◽  
Lumbar Disc ◽  
Diffusion Weighted ◽  
And Diffusion
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