کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
10712683 1025222 2013 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Multi-center prediction of hemorrhagic transformation in acute ischemic stroke using permeability imaging features
ترجمه فارسی عنوان
پیش بینی چند مرکزی از تغییرات هموراژیک در سکته مغزی ایسکمیک حاد با استفاده از ویژگی های تصویربرداری نفوذپذیری
کلمات کلیدی
ایسکمی مغز، تحول هموراژیک، پیش بینی، تشخیص حاد سکته مغزی، سکته مغزی نفوذپذیری،
موضوعات مرتبط
مهندسی و علوم پایه فیزیک و نجوم فیزیک ماده چگال
چکیده انگلیسی
Permeability images derived from magnetic resonance (MR) perfusion images are sensitive to blood-brain barrier derangement of the brain tissue and have been shown to correlate with subsequent development of hemorrhagic transformation (HT) in acute ischemic stroke. This paper presents a multi-center retrospective study that evaluates the predictive power in terms of HT of six permeability MRI measures including contrast slope (CS), final contrast (FC), maximum peak bolus concentration (MPB), peak bolus area (PB), relative recirculation (rR), and percentage recovery (%R). Dynamic T2*-weighted perfusion MR images were collected from 263 acute ischemic stroke patients from four medical centers. An essential aspect of this study is to exploit a classifier-based framework to automatically identify predictive patterns in the overall intensity distribution of the permeability maps. The model is based on normalized intensity histograms that are used as input features to the predictive model. Linear and nonlinear predictive models are evaluated using a cross-validation to measure generalization power on new patients and a comparative analysis is provided for the different types of parameters. Results demonstrate that perfusion imaging in acute ischemic stroke can predict HT with an average accuracy of more than 85% using a predictive model based on a nonlinear regression model. Results also indicate that the permeability feature based on the percentage of recovery performs significantly better than the other features. This novel model may be used to refine treatment decisions in acute stroke.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Magnetic Resonance Imaging - Volume 31, Issue 6, July 2013, Pages 961-969
نویسندگان
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