کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
847121 909220 2016 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
The influence of spectrum and imaging geometry on propagation-based phase-contrast imaging for micro-focus source
ترجمه فارسی عنوان
تأثیر طیف و هندسه تصویربرداری بر روی تصویربرداری فازی متمرکز بر انتشار برای منبع میکرو فوکوس
کلمات کلیدی
تصویربرداری فاز کنتراست، هندسه، پلی کربنات، میکرو تمرکز
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی (عمومی)
چکیده انگلیسی

In addition to the widely used monochromatic X-ray source, the polychromatic X-ray source may also be used in many cases of propagation-based phase-contrast imaging (PB-PCI). It is not sufficient to investigate the optimization procedure only for the monochromatic applications. The focus of this paper is to investigate the effects of spectrum and imaging geometry on the image quality of PB-PCI, for applications involving propagation in vacuum and air. The quality of phase contrast image has been quantitatively characterized by using contrast and SNR as quality metrics in this paper. The optimal geometry has been investigated in three situations, where four cases are considered. Based on the numerical simulation, it is observed that the contrast and SNR in the case of polychromatic X-ray are lower than the monochromatic X-ray. Therefore, the influence of the X-ray spectrum on the contrast and SNR must not be neglected. The contrast in the case of polychromatic X-ray, and the SNR in both polychromatic and monochromatic X-ray, is lower for propagation in air compared to the propagation in vacuum. Evidently, the air absorption is an important factor in the propagation-based phase-contrast imaging. The experimental and numerical results for all three situations are presented to verify the effect of the geometry on the image quality in the air condition. It is found that the experimental results confirm the validity of numerical results for both the quality metrics. The object specification and the X-ray scattering have obvious influence on the image quality, as seen in the experimental results.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Optik - International Journal for Light and Electron Optics - Volume 127, Issue 6, March 2016, Pages 3286–3291
نویسندگان
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