کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1885932 1533516 2015 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
A library least-squares approach for scatter correction in gamma-ray tomography
ترجمه فارسی عنوان
یک کتابخانه کمترین مربع برای اصلاح پراکندگی در توموگرافی اشعه گاما
کلمات کلیدی
توموگرافی رادیوگرافی گاما، کمترین مربع کتابخانه، اصلاح پراکنده
موضوعات مرتبط
مهندسی و علوم پایه فیزیک و نجوم تشعشع
چکیده انگلیسی


• A LLS approach is proposed for scatter correction in gamma-ray tomography.
• The validity of the LLS approach is tested through experiments.
• Gain shift and pulse pile-up affect the accuracy of the LLS approach.
• The LLS approach successfully estimates scatter profiles.

Scattered radiation is known to lead to distortion in reconstructed images in Computed Tomography (CT). The effects of scattered radiation are especially more pronounced in non-scanning, multiple source systems which are preferred for flow imaging where the instantaneous density distribution of the flow components is of interest. In this work, a new method based on a library least-squares (LLS) approach is proposed as a means of estimating the scatter contribution and correcting for this. The validity of the proposed method is tested using the 85-channel industrial gamma-ray tomograph previously developed at the University of Bergen (UoB). The results presented here confirm that the LLS approach can effectively estimate the amounts of transmission and scatter components in any given detector in the UoB gamma-ray tomography system.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Radiation Physics and Chemistry - Volume 108, March 2015, Pages 39–47
نویسندگان
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