Two non-linear parametric models of enhancement for breast DCE-MRI that can be fitted using linear least squares
نویسنده
چکیده
Chalmers Publication Library (CPL) offers the possibility of retrieving research publications produced at Chalmers University of Technology. It covers all types of publications: articles, dissertations, licentiate theses, masters theses, conference papers, reports etc. Since 2006 it is the official tool for Chalmers official publication statistics. To ensure that Chalmers research results are disseminated as widely as possible, an Open Access Policy has been adopted. The CPL service is administrated and maintained by Chalmers Library.
منابع مشابه
Quantifying heterogeneity of lesion uptake in dynamic contrast enhanced MRI for breast cancer diagnosis
The current study investigates whether texture features extracted from lesion kinetics feature maps can be used for breast cancer diagnosis. Fifty five women with 57 breast lesions (27 benign, 30 malignant) were subjected to dynamic contrast-enhanced magnetic resonance imaging (DCE-MRI) on 1.5T system. A linear-slope model was fitted pixel-wise to a representative lesion slice time series and f...
متن کاملIntrinsic susceptibility contrast (R2*) in the evaluation of tumour oxygenation at baseline and in response to neoadjuvant chemotherapy in breast cancer
Introduction: The ability to image tumour hypoxia and evaluate oxygenation changes in response to treatment using R2* is a powerful yet underexplored tool in breast cancer in humans [1]. This study evaluates the relationship between baseline histology and dynamic contrast enhanced (DCE) and dynamic susceptibility enhanced (DSC) MRI parameters with R2* in breast cancer. The role of R2* as an ima...
متن کاملComparison of the Kinetic Parameters Estimated with Different Numerical Methods in Dce-mri
Introduction: Dynamic contrast enhanced MRI (DCE-MRI) has been shown its ability to noninvasively assess characterization of tumor by the kinetic parameters, such as volume transfer constant (K) and rate constant (kep). The Tofts and Kermode (TK) model [1] and modification of Tofts and Kermode (mTK) model [2] are both popular pharmacokinetic models. Nonlinear least-squares (NLSQ) method is ofte...
متن کاملExact and approximate solutions of fuzzy LR linear systems: New algorithms using a least squares model and the ABS approach
We present a methodology for characterization and an approach for computing the solutions of fuzzy linear systems with LR fuzzy variables. As solutions, notions of exact and approximate solutions are considered. We transform the fuzzy linear system into a corresponding linear crisp system and a constrained least squares problem. If the corresponding crisp system is incompatible, then the fuzzy ...
متن کاملPositive solution of non-square fully Fuzzy linear system of equation in general form using least square method
In this paper, we propose the least-squares method for computing the positive solution of a $mtimes n$ fully fuzzy linear system (FFLS) of equations, where $m > n$, based on Kaffman's arithmetic operations on fuzzy numbers that introduced in [18]. First, we consider all elements of coefficient matrix are non-negative or non-positive. Also, we obtain 1-cut of the fuzzy number vector solution of ...
متن کامل