在MR指导放射治疗中对电影MRI压缩的初步研究
Jiawen Shang1, Peng Huang1, Ke Zhang1
1Department of Radiation Oncology, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China.
Quantitative imaging in medicine and surgery
|December 18, 2023
概括
使用高效视频编码 (HEVC) 的视频压缩有效地减少了放射治疗中使用的电影磁共振成像 (MRI) 数据. 这种方法解决了在处理过程中获得的大量2D图像的存储限制.
科学领域:
- 医疗成像医学成像
- 放射治疗技术 放射治疗技术
- 数据压缩数据压缩
背景情况:
- 电影磁共振成像 (MRI) 在MR导向放射治疗中对实时瘤跟踪至关重要.
- 获取众多2D电影MRI图像产生大量数据,这给临床存储带来了挑战.
- 需要有效的数据压缩来管理放射治疗中的大型图像数据集.
研究的目的:
- 调查使用视频编码器压缩电影MRI数据的可行性.
- 评估不同视频压缩技术在放射治疗成像中的有效性.
主要方法:
- 电影MRI图像根据平面方向排序成序列,并根据时间或内容相似性重新排序.
- 应用了三个视频编码器:运动JPEG (M-JPEG),高级视频编码 (AVC) 和高效视频编码 (HEVC).
- 使用150个图像集进行了性能评估,评估了压缩比和恢复精度.
主要成果:
- 基于相似性的 (SB) 序列比基于时间的 (TB) 序列实现了更高的平均相关性和压缩比率.
- 与不同平面的M-JPEG相比,HEVC和AVC显著提高了压缩比.
- 在测试的编码器中,HEVC显示了最高的压缩比和恢复精度.
结论:
- 高效视频编码 (HEVC),利用跨编码,是非常有效的减少冗余信息在连续的电影MRI图像.
- 视频编码器实现是可行的高性能cine-MRI压缩,解决临床数据存储的限制.
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