دانلود مقاله ISI انگلیسی شماره 81290
ترجمه فارسی عنوان مقاله

بهینه سازی برای توموگرافی زاویه محدود در پردازش تصاویر پزشکی

عنوان انگلیسی
Optimization for limited angle tomography in medical image processing
کد مقاله سال انتشار تعداد صفحات مقاله انگلیسی
81290 2011 9 صفحه PDF
منبع

Publisher : Elsevier - Science Direct (الزویر - ساینس دایرکت)

Journal : Pattern Recognition, Volume 44, Issues 10–11, October–November 2011, Pages 2427–2435

ترجمه کلمات کلیدی
توموگرافی زاویه محدود؛ مشکل معکوس Ill-posed؛ کل تنوع (TV)
کلمات کلیدی انگلیسی
Limited angle tomography; Ill-posed inverse problem; Total variation (TV)
پیش نمایش مقاله
پیش نمایش مقاله  بهینه سازی برای توموگرافی زاویه محدود در پردازش تصاویر پزشکی

چکیده انگلیسی

This paper aims to reduce the problems of incomplete data in computed tomography, which happens frequently in medical image process and analysis, e.g., when the high-density region of objects can only be penetrated by X-rays at a limited angular range. As the projection data are available only in an angular range, the incomplete data problem can be attributed to the limited angle problem, which is an ill-posed inverse problem. Image reconstruction based on total variation (TV) reduces the problem and gives better performance on edge-preserving reconstruction; however, the artificial parameter can only be determined through considerable experimentation. In this paper, an effective TV objective function is proposed to reduce the inverse problem in the limited angle tomography. This novel objective function provides a robust and effective reconstruction without any artificial parameter in the iterative processes, using the TV as a multiplicative constraint. The results demonstrate that this reconstruction strategy outperforms some previous ones.