Results 111 to 120 of about 1,660 (149)

Fundamental criterion Ktrans for failure analysis of hydrogen-assisted cracks in notched specimens of pure Ni

Theoretical and Applied Fracture Mechanics, 2020
Abstract The effects of short notches on crack initiation and extension were studied under electrochemical hydrogen charging in pure nickel. In the hydrogen-charged smooth specimen, multiple cracks were initiated on grain boundaries after significant plastic deformation and were subsequently arrested by crack blunting in the interior of neighboring ...
Tingshu Chen, Motomichi Koyama, Shigeru Hamada, Hiroshi Noguchi   +3 more
openaire   +1 more source

Multi-parametric magnetic resonance imaging of prostate cancer: correlation between Ktrans, Gleason score, and PI-RADS score

Journal of Medical Imaging and Interventional Radiology
Abstract Purpose To measure Ktrans and correlate it with Gleason score (GS) and PI-RADS score in patients with prostate cancer. Methods This retrospective study included patients with pathologically proven prostate cancer who had undergone clinically indicated 1.5 Tesla ...
Tommaso Biondi, Andrea Laghi, Stefano Nardacci   +2 more
exaly   +2 more sources

Investigating the Correlation of Ktrans With Semi-Quantitative MRI Parameters Towards More Robust and Reproducible Perfusion Imaging Biomarkers in Three Cancer Types

IEEE Journal of Biomedical and Health Informatics, 2019
MRI Imaging biomarkers (IBs) have the potential to deliver quantitative cancer descriptors of pathophysiology for non-invasively screening, diagnosing, and monitoring cancer patients across the cancer continuum. Despite a worldwide effort to standardize IBs involving major cancer organizations, significant variability of MR-based imaging biomarker ...
Apostolos H Karantanas, Thomas G Maris, Georgios S Ioannidis   +2 more
exaly   +4 more sources

Application of KTRAN Transonic Small Disturbance Code to the Challenger Business Jet Configuration with Winglets

SAE Technical Paper Series, 1988
<div class="htmlview paragraph">A Transonic Small Disturbance code originally developed at Canadair for the analysis of 3D wing/body/pylon/store configurations (AGARD CP-412-8) has been extended to calculate flows around complete aircraft such as the Challenger Executive Jet.</div> <div class="htmlview paragraph">The program uses a ...
F. Kafyeke, P. Piperni, S. Robin
openaire   +1 more source

Value of dynamic MRI using the Ktrans technique for assessment of native kidneys in pre-emptive renal transplantation

Acta Radiologica, 2016
Background Different non-invasive imaging techniques such as Doppler ultrasonography and renal scintigraphy are commonly employed to assess allograft function and associated complications. However, all such methods lack sufficient specificity to discriminate between residual renal function of native kidneys ...
KARACA, LEYLA, SADE, RECEP, OKUR, AYLİN, keles, mustafa, AYAN, ARİF KÜRŞAD, KANTARCI, ABDULMECİT, cankaya, Erdem, OĞUL, HAYRİ   +7 more
openaire   +5 more sources

Application of histogram analysis for the evaluation of vascular permeability in glioma by the K2 parameter obtained with the dynamic susceptibility contrast method: Comparisons with Ktrans obtained with the dynamic contrast enhance method and cerebral blood volume

Magnetic Resonance Imaging, 2016
The "K2" value is a factor that represents the vascular permeability of tumors and can be calculated from datasets obtained with the dynamic susceptibility contrast (DSC) method. The purpose of the current study was to correlate K2 with Ktrans, which is a well-established permeability parameter obtained with the dynamic contrast enhance (DCE) method ...
Toshiaki Taoka, Shinji Naganawa, Toshiteru Miyasaka   +2 more
exaly   +4 more sources

The effectiveness of the volume transfer constant (Ktrans) as an aid to regional segmentation of nasopharyngeal tumors

ISMRM Annual Meeting
Accurate segmentation of nasopharyngeal tumor lesions from dynamic contrast-enhanced magnetic resonance imaging (DCE-MRI) facilitates subsequent diagnosis and treatment. However, current segmentation methods do not incorporate the pathological properties of the tumor. Therefore, this paper proposes a multimodal DCE-MRI segmentation method that uses the
Junhui Huang, Zhou Liu, Liyan Zou, Yingying Chen, Zhanli Hu, Dong Liang, Xin Liu, Hairong Zheng, Na Zhang   +8 more
openaire   +1 more source

Pilot study on evaluation of any correlation between MR perfusion (Ktrans) and diffusion (apparent diffusion coefficient) parameters in brain tumors at 3 Tesla [PDF]

Cancer Imaging, 2012
To assess any correlation of volume transfer constant (Ktrans) with apparent diffusion coefficient (ADC) in different brain tumor types at 3 T magnetic resonance (MR) imaging.Thirteen patients with brain tumors (8 men, 5 women; mean age 54.6±17.7 years) were enrolled in this retrospective study.
Jian-Ping Chu, Henry Ka-Fung Mak, Gilberto Ka Kit Leung   +2 more
exaly   +5 more sources

Acquisition of Ktrans perfusion parameter maps from DCE-MRI using a deep learning approach

ISMRM Annual Meeting
Motivation: Breast cancer has become the leading cancer worldwide. Hemodynamic features obtained from breast DCE-MRI perfusion maps can accurately quantify tumor pathophysiology. However, traditional estimation of perfusion parameter maps requires significant computational resources and time. Goal(s): To investigate whether deep learning techniques can
Daohui Zeng, Mu Du, Yubao Liu, Bingyu Yao, Junhui Huang, Long Yang, Xuanle Li, Ye Li, Dong Liang, Xin Liu, Hairong Zheng, Zhanli Hu, Na Zhang   +12 more
openaire   +1 more source

Fully Automated Dynamic Contrast Enhanced MRI Image Processing Pipeline Reduces Variance in Ktrans

ISMRM Annual Meeting
Motivation: Processing dynamic contrast-enhanced (DCE) MRI involves several preprocessing steps, making it very time-consuming and challenging to achieve consistency and reproducibility. Goal(s): To develop an automated software pipeline for processing DCE MRI images, enhancing both the speed and consistency of DCE data processing.
Lucas Saca, Ararat Chakhoyan, Raghav Gaggar, Ioannis Pappas, Arthur Toga, Berislav Zlokovic, Daniel Nation, Samuel Barnes   +7 more
openaire   +1 more source