Pragmatic Approaches to Reducing Radiation Dose in Brain Computed Tomography Scan using Scan Parameter Modification
سال انتشار: 1401
نوع سند: مقاله ژورنالی
زبان: انگلیسی
مشاهده: 76
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شناسه ملی سند علمی:
JR_JMSI-12-3_004
تاریخ نمایه سازی: 28 تیر 1402
چکیده مقاله:
Background: High radiation dose of patients has become a concern in the computed tomography (CT)
examinations. The aim of this study is to guide the radiology technician in modifying or optimizing
the underlying parameters of the CT scan to reduce the patient radiation dose and produce an
acceptable image quality for diagnosis. Methods: The body mass measurement device phantom was
repeatedly scanned by changing the scan parameters. To analyze the image quality, software‑based
and observer‑based evaluations were employed. To study the effect of scan parameters such as
slice thickness and reconstruction filter on image quality and radiation dose, the structural equation
modeling was used. Results: By changing the reconstruction filter from standard to soft and slice
thickness from ۲.۵ mm to ۵ mm, low‑contrast resolution did not change significantly. In addition, by
increasing the slice thickness and changing the reconstruction filter, the spatial resolution at different
radiation conditions did not significantly differ from the standard irradiation conditions (P > ۰.۰۵).
Conclusion: In this study, it was shown that in the brain CT scan imaging, the radiation dose was
reduced by ۳۰%–۵۰% by increasing the slice thickness or changing the reconstruction filter. It is
necessary to adjust the CT scan protocols according to clinical requirements or the special conditions
of some patients while maintaining acceptable image quality.
کلیدواژه ها:
Multidetector computed tomography scans ، radiation dose ، scan parameter modifications ، software‑ and observer‑based evaluations
نویسندگان
Mohammad Reza Choopani
Departments of Radiology, Isfahan University of Medical Sciences, Isfahan, Iran
Iraj Abedi
Department of Medical Physics, Isfahan University of Medical Sciences, Isfahan, Iran
Fatemeh Dalvand
Department of Medical Radiation Engineering, Shahid Beheshti University, Tehran, Iran