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目的:探讨了低剂量CT图像恢复的研究进展。方法:从低剂量CT研究的价值与面临问题、图像去噪算法、投影数据解析重建和迭代重建四个角度,阐述了低剂量技术的优缺点和图像恢复算法的发展趋势。结果:最新图像恢复算法的不断涌现,有效去除了低剂量CT投影数据噪声,提高了图像质量,确保了诊断的准确性。结论:尽管每种算法均有自身局限性,但仍然为低剂量CT成像技术降低了患者辐射剂量,并为更深广的诊断需求提供了可能。
Objective: To explore the research progress of low dose CT image restoration. Methods: The advantages and disadvantages of low-dose technique and the development trend of image restoration algorithm are described from the aspects of the value and problems of low-dose CT research, image denoising algorithm, projection data reconstruction and iterative reconstruction. Results: The newest image restoration algorithms are emerging constantly, which effectively removes the noise of low-dose CT projection data, improves the image quality and ensures the accuracy of diagnosis. Conclusion: Despite the limitations of each algorithm, low-dose CT imaging reduces the patient’s radiation dose and offers the potential for broader diagnostic needs.