过后投影与CBCT的代重建:对图像噪声和处理时间的影响
Amanda Ramage1, Bryan Lopez Gutierrez1, Kathleen Fischer1
1University of Louisville School of Dentistry, Louisville, Kentucky, USA.
Dento maxillo facial radiology
|September 4, 2023
概括
代重建 (IR) 与过后投影 (FBP) 相比,可以显著降低形光束计算机断层扫描 (CBCT) 图像噪声. 这种降低噪音可以在不大增加处理时间的情况下实现,从而改善牙科应用的图像质量.
科学领域:
- 医疗成像医学成像
- 放射学 放射学是一门学科.
- 牙科成像 牙科成像 牙科成像
背景情况:
- 圆束计算断层扫描 (CBCT) 在牙科诊断中至关重要.
- 图像噪声会影响诊断的准确性.
- 过后投影 (FBP) 是一个标准的重建方法,但代重建 (IR) 提供了潜在的改进.
研究的目的:
- 为了评估FBP和IR对CBCT图像噪声的影响.
- 评估获取参数和金属工件减少 (MAR) 对噪声的影响.
- 为了比较FBP和IR的处理时间.
主要方法:
- 使用不同的参数 (mA,FOV,分辨率) 来获得带有植入物和没有植入物的下的CBCT扫描.
- 用FBP和IR重建图像,有或没有MAR.
- 用灰色密度值的标准偏差量化图像噪声;记录处理时间.
主要成果:
- 与过后投影 (FBP) 相比,代重建 (IR) 在所有参数上显著降低了图像噪声 (p < 0.05).
- 噪音降低范围在29.7%至58.1%之间,取决于采集设置.
- 红外线平均增加了35.1秒的处理时间.
结论:
- 代重建 (IR) 在减少CBCT图像噪声方面优于过后投影 (FBP).
- 在降低噪音方面,IR的好处超过了处理时间的适度增加.
- 在牙科应用中,IR提高了CBCT图像质量.
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