The assessment of consistency using penetrometer and apparent diffusion coefficient (ADC) value using diffusion weighted magnetic resonance imaging (DW-MRI) from polyvinyl alcohol (PVA) formed by freezing-thawing cycle

2012 ◽  
Author(s):  
Yanurita Dwihapsari ◽  
Dita Puspita Sari ◽  
Darminto
Keyword(s):  
Magnetic Resonance Imaging ◽  
Diffusion Coefficient ◽  
Magnetic Resonance ◽  
Polyvinyl Alcohol ◽  
Apparent Diffusion Coefficient ◽  
Resonance Imaging ◽  
Adc Value ◽  
Thawing Cycle ◽  
Apparent Diffusion ◽  
Weighted Magnetic Resonance Imaging

scholarly journals The Value of Diffusion-Weighted Magnetic Resonance Imaging in Predicting the Efficacy of Radiation and Chemotherapy in Cervical Cancer

2018 ◽  
Vol 13 (1) ◽  
pp. 305-311 ◽  
Author(s):  
Jingjing Chen ◽  
Hui Hua ◽  
Jing Pang ◽  
Xianglong Shi ◽  
Weiqun Bi ◽  
...  
Keyword(s):  
Magnetic Resonance Imaging ◽  
Cervical Cancer ◽  
Diffusion Coefficient ◽  
Magnetic Resonance ◽  
Tumor Diameter ◽  
Resonance Imaging ◽  
Adc Value ◽  
Apparent Diffusion ◽  
Maximum Tumor Diameter ◽  
Weighted Magnetic Resonance Imaging

AbstractBackgroundTo analyze the application value of apparent diffusion coefficient (ADC) and exponent apparent diffusion coefficient (EADC) in evaluating the efficacy of radiation and chemotherapy in cervical cancer using pre- and posttreatment diffusion-weighted magnetic resonance imaging (DW-MRI) scans.Methods52 patients with cervical cancer were administered radiation and chemotherapy. Both MRI and DW-MRI were obtained at different stages. The ADC and EADC values, as well as the maximum tumor diameter, were measured and analyzed.ResultsWe found that the ADC value increased after treatment, and the EADC value decreased. Changes in the calculated ADC occurred earlier than the morphologic changes of the tumors. A negative correlation was detected between reduced rates in the maximum tumor diameter two months after treatment and pretreatment ADC value (r = –0.658, P < 0.05). An ROC curve and nonlinear regression analysis showed that the formula, y = (1525500.122x2 – 4689.962x + 3.482) × 100%, can be used to calculate the percentage of complete remission after treatment according to the pretreatment ADC value.ConclusionOur data suggest that pretreatment ADC and EADC values are predictive of the efficacy of radiation and chemotherapy. Both ADC and EADC values during treatment were instrumental in early monitoring and dynamic observation.

scholarly journals Measuring Restriction Sizes Using Diffusion Weighted Magnetic Resonance Imaging: A Review

2013 ◽  
Vol 6 ◽  
pp. MRI.S11149 ◽  
Author(s):  
Melanie Martin
Keyword(s):  
Magnetic Resonance Imaging ◽  
Diffusion Coefficient ◽  
Magnetic Resonance ◽  
Apparent Diffusion Coefficient ◽  
Spin Echo ◽  
Resonance Imaging ◽  
Free Diffusion ◽  
Diffusion Weighted ◽  
Apparent Diffusion ◽  
Weighted Magnetic Resonance Imaging

This article reviews a new concept in magnetic resonance as applied to cellular and biological systems. Diffusion weighted magnetic resonance imaging can be used to infer information about restriction sizes of samples being measured. The measurements rely on the apparent diffusion coefficient changing with diffusion times as measurements move from restricted to free diffusion regimes. Pulsed gradient spin echo (PGSE) measurements are limited in the ability to shorten diffusion times and thus are limited in restriction sizes which can be probed. Oscillating gradient spin echo (OGSE) measurements could provide shorter diffusion times so smaller restriction sizes could be probed.

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