عنوان المقالة:تأثير الإشعاع المرتجع على تباين صور الأشعة السينية Effect of Backscattered Radiation on X-Ray Image Contrast
ا.د سلوان كمال جميل العاني | Prof.Salwan K.J.Al-Ani (Ph.D) FInstP | 24951
نوع النشر
مجلة علمية
المؤلفون بالعربي
المؤلفون بالإنجليزي
A. T. Naji , M. S. Jaafar, E. A. Ali and S. K. J. Al-Ani
الملخص الانجليزي
This paper assesses the effect of backscattered radiation on X-ray image contrast by evaluating the effect of backscatter reduction on X-ray image contrast. Contrast test tool RMI Densitometer, and different types of fabricated anti backscattered grids have been utilized in this study. The measurements are recorded at different exposure parameters such as X-ray tube peak voltage (kVp), and X-rays intensities (mAs). For each exposure, the contrast of the image is evaluated by measuring the variation in optical densities for aluminium steps wedge. The results showed that the x-ray image contrast can be enhanced by decreasing the amount of backscattered radiation, also the fabricated anti backscattered grids have a remarkable effect in the improvement of X-ray image contrast according to grid’s capability in reducing backscattered radiation. In addition, the effectiveness of fabricated grids in improving image contrast depends on the grid’s material and the geometrical design, as well as the radiation exposure parameters. The image contrast enhancements increased up to 36% with the use of crossed iron steel grid which placed under the film screen combination during exposure.
تاريخ النشر
31/01/2017
الناشر
Applied Physics Research
رقم المجلد
1
رقم العدد
9
ISSN/ISBN
1916-9639
الصفحات
105-114
رابط الملف
تحميل (668 مرات التحميل)
الكلمات المفتاحية
contrast, anti-backscattered grid, x-ray, image quality
رجوع