Comparisons of Hounsfield Unit Linearity between Images Reconstructed using an Adaptive Iterative Dose Reduction (AIDR) and a Filter Back-Projection (FBP) Techniques
محل انتشار: مجله فیزیک و مهندسی پزشکی، دوره: 10، شماره: 2
سال انتشار: 1399
نوع سند: مقاله ژورنالی
زبان: انگلیسی
مشاهده: 54
فایل این مقاله در 10 صفحه با فرمت PDF قابل دریافت می باشد
- صدور گواهی نمایه سازی
- من نویسنده این مقاله هستم
استخراج به نرم افزارهای پژوهشی:
شناسه ملی سند علمی:
JR_JBPE-10-2_013
تاریخ نمایه سازی: 1 بهمن 1402
چکیده مقاله:
Background: The HU linearity is an essential parameter in a quantitative imaging and the treatment planning systems of radiotherapy. Objective: This study aims to evaluate the linearity of Hounsfield unit (HU) in applying the adaptive iterative dose reduction (AIDR) on CT scanner and its comparison to the filtered back-projection (FBP).Material and Methods: In this experimental phantom study, a TOS-phantom was scanned using a Toshiba Alexion ۶ CT scanner. The images were reconstructed using the FBP and AIDR. Measurements of HU and noise values were performed on images of the “HU linearity” module of the TOS-phantom. The module had five embedded objects, i.e., air, polypropylene, nylon, acrylic, and Delrin. On each object, a circle area of ۴.۳۲ cm۲ was drawn and used to measure HU and noise values. The R۲ of the relation between mass densities vs. HU values was used to measure HU linearities at four different tube voltages. The Mann-Whitney U test was used to compare unpaired data and p-value < ۰.۰۵ was considered statistically significant. Results: The AIDR method produced a significant smaller image noise than the FBP method (p-value < ۰.۰۵). There were no significant differences in HU values of images reconstructed using FBP and AIDR methods (p-value > ۰.۰۵). The HU values acquired by the methods showed the same linearity marked by coinciding linear lines with the same R۲ value (> ۰.۹۹۹). Conclusion: AIDR methods produce the HU linearity as FBP methods with a smaller image noise level.
کلیدواژه ها:
Tomography Scanners ، X-Ray Computed ، Radiation Dosage ، Phantoms ، Imaging ، FBP ، AIDR ، HU linearity
نویسندگان
I Suyudi
BSc, Department of Physics, Faculty of Sciences and Mathematics, Diponegoro University, Indonesia
C Anam
PhD, Department of Physics, Faculty of Sciences and Mathematics, Diponegoro University, Indonesia
H Sutanto
PhD, Department of Physics, Faculty of Sciences and Mathematics, Diponegoro University, Indonesia
P Triadyaksa
PhD, Department of Physics, Faculty of Sciences and Mathematics, Diponegoro University, Indonesia
T Fujibuchi
PhD, Department of Health Sciences, Faculty of Medical Sciences, Kyushu University, Japan
مراجع و منابع این مقاله:
لیست زیر مراجع و منابع استفاده شده در این مقاله را نمایش می دهد. این مراجع به صورت کاملا ماشینی و بر اساس هوش مصنوعی استخراج شده اند و لذا ممکن است دارای اشکالاتی باشند که به مرور زمان دقت استخراج این محتوا افزایش می یابد. مراجعی که مقالات مربوط به آنها در سیویلیکا نمایه شده و پیدا شده اند، به خود مقاله لینک شده اند :