این سایت در حال حاضر پشتیبانی نمی شود و امکان دارد داده های نشریات بروز نباشند
Iranian Journal of Medical Physics، جلد ۱۷، شماره ۵، صفحات ۳۴۰-۳۴۹
عنوان فارسی
چکیده فارسی مقاله
کلیدواژه‌های فارسی مقاله
عنوان انگلیسی Reversal Trend of Hounsfield Unit Values of Substances with High and Low Effective Atomic Numbers
چکیده انگلیسی مقاله Introduction: In dual-energy computed tomography (DECT), the Hounsfield values of a substance measured at two different energies are the basic data for finding the chemical properties of a substance. The trends of Hounsfield unit (HU) alterations following the changes in energy are different between the materials with high and low Zeff. The present study aimed to analyze the basic principles related to the attenuation coefficient of x-ray photons and a quantitative explanation is given for the mentioned behavior or trend. Material and Methods: A mathematical expression was derived for the HU difference between two different scanner voltages. Attenuation coefficients of diverse substances, such as methanol, glycerol, acetic acid, the aqueous solution of potassium hydroxide, and water were calculated for x-ray scanners operating differently at distinct applied voltages and with diverse inherent or added filters. Results: Findings of the current study demonstrated that the negative or positive outcome of HU(V1) - HU(V2) equation is not determined by the electron density of a substance. However, it is affected by the effective atomic number (Zeff) of the material and machine parameters specified by the source spectrum. Conclusion: According to our results, the sign of HU difference [HU(V1) – HU(V2)] for the variable cases of V2 and V1 gives an indication of the effective atomic number of the material under study. The obtained results might be of diagnostic value in the DECT technique.
کلیدواژه‌های انگلیسی مقاله Atomic Number Dual, Energy Computed Tomography Effective Energy Hounsfield Unit
نویسندگان مقاله | Fariba Zarei
Medical Imaging Research Center, Shiraz University of Medical Sciences, Shiraz, Iran


| Sabysachi chatterjee
Ongil, 79 D3, Sivaya Nagar, Reddiyur Alagapuram, Salem 636004, India


| Vani Vardhan Chatterjee
Department of Instrumentation and Applied Physics, Indian Institute of Science, Bangalore 560012, India


| Rezvan Ravanfar Haghighi
Nuclear Medicine and Molecular Imaging Research Center, Shiraz University of Medical Sciences, Shiraz, Iran
نشانی اینترنتی https://ijmp.mums.ac.ir/article_14340.html
فایل مقاله فایلی برای مقاله ذخیره نشده است
کد مقاله (doi)
زبان مقاله منتشر شده en
موضوعات مقاله منتشر شده
نوع مقاله منتشر شده Original Paper
برگشت به: صفحه اول پایگاه   |   نسخه مرتبط   |   نشریه مرتبط   |   فهرست نشریات