Application of Fast Non-Local Denoising Approach in Digital Radiography Using Lung Nodule Phantom for Radiation Dose Reduction
محل انتشار: مجله فیزیک پزشکی ایران، دوره: 19، شماره: 6
سال انتشار: 1401
نوع سند: مقاله ژورنالی
زبان: انگلیسی
مشاهده: 150
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شناسه ملی سند علمی:
JR_IJMP-19-6_006
تاریخ نمایه سازی: 11 آبان 1401
چکیده مقاله:
Introduction: Chest X-ray imaging has become the most commonly used, as it is the primary method for lung cancer screening during medical check-ups. The radiation dose should be minimized to ensure that the patients are not overexposed to radiation. However, radiation dose reduction results in increased noise in the chest X-ray image. Thus, the purpose of this study was to evaluate the utility of fast non-local means (FNLM) filters to reduce radiation dose while maintaining sufficient image quality.Material and Methods: This study evaluates three filters (median, Wiener, and total variation) and a newly proposed filter (fast non-local means (FNLM)), which reduce image noise. A realistic anthropomorphic phantom is used to compare images acquired depending on positions such as anterior-posterior, lateral, and posterior-anterior, using a self-produced ۳D printed lung nodule phantom. To evaluate image quality, we used the normalized noise power spectrum (NNPS), contrast to noise ratio (CNR), and coefficient of variation (COV) evaluation parameters.Results: The NNPS and COV were lowest and the CNR was highest with FNLM images. FNLM filter outperforms other compared filters in terms of noise reduction.Conclusion: Therefore, the use of an FNLM filter is recommended, because it reduces the radiation dose to a patient and thus minimizes the risk of cancer, while maintaining diagnostic quality.
کلیدواژه ها:
Digital Radiography X ، Ray Image Denoising Fast Non ، Local Means (FNLM) Approach ۳D Printing Quantitative Evaluation of Image Quality
نویسندگان
Jina Shim
Department of Diagnostic Radiology, Severance Hospital, Seoul, Republic of Korea
Myonggeun Yoon
Department of Bio-Convergence Engineering, Korea University, Seoul, Republic of Korea
Youngjin Lee
Department of Radiological Science, Gachon University, Incheon, Republic of Korea
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