Referenceless MR thermometry-a comparison of five methods
文献类型：期刊论文
| 作者 | Zou, Chao; Tie, Changjun; Pan, Min; Wan, Qian; Liang, Changhong; Liu, Xin; Chung, Yiu-Cho |
| 刊名 | PHYSICS IN MEDICINE AND BIOLOGY
 |
| 出版日期 | 2017 |
| 文献子类 | 期刊论文 |
| 英文摘要 | Proton resonance frequency shift (PRFS) MR thermometry is commonly used to measure temperature in thermotherapy. The method requires a baseline tem-perature map and is therefore motion sensitive. Several referenceless MR thermometry methods were proposed to address this problem but their performances have never been compared. This study compared the performance of five referenceless methods through simulation, heating of ex vivo tissues and in vivo imaging of the brain and liver of healthy volunteers. Mean, standard deviation, root mean square, 2/98 percentiles of error were used as performance metrics. Probability density functions (PDF) of the error distribution for these methods in the different tests were also compared. The results showed that the phase gradient method (PG) exhibited largest error in all scenarios. The original method (ORG) and the complex field estimation method (CFE) had similar performance in all experiments. The phase finite difference method (PFD) and the near harmonic method (NH) were better than other methods, especially in the lower signal-to-noise ratio (SNR) and fast changing field cases. Except for PG, the PDFs of each method were very similar among the different experiments. Since phase unwrapping in ORG and NH is computationally demanding and subject to image SNR, PFD and CFE would be good choices as they do not need phase unwrapping. The results here would facilitate the choice of appropriate referenceless methods in various MR thermometry applications. |
| URL标识 | 查看原文 |
| 语种 | 英语 |
| 源URL | [http://ir.siat.ac.cn:8080/handle/172644/12041]  |
| 专题 | 深圳先进技术研究院_医工所 |
| 作者单位 | PHYSICS IN MEDICINE AND BIOLOGY |
| 推荐引用方式 GB/T 7714 | Zou, Chao,Tie, Changjun,Pan, Min,et al. Referenceless MR thermometry-a comparison of five methods[J]. PHYSICS IN MEDICINE AND BIOLOGY,2017. |
| APA | Zou, Chao.,Tie, Changjun.,Pan, Min.,Wan, Qian.,Liang, Changhong.,...&Chung, Yiu-Cho.(2017).Referenceless MR thermometry-a comparison of five methods.PHYSICS IN MEDICINE AND BIOLOGY. |
| MLA | Zou, Chao,et al."Referenceless MR thermometry-a comparison of five methods".PHYSICS IN MEDICINE AND BIOLOGY (2017). |
入库方式： OAI收割
来源：深圳先进技术研究院
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