PET/MR attenuation correction method based on transmission scan
10.13491/j.issn.1004-714X.2024.05.002
- VernacularTitle:基于透射扫描的PET/MR数据衰减校正方法
- Author:
Shengnan FAN
1
;
Xingzhao GUO
2
;
Weidong MA
1
;
Jun DENG
1
;
Lei DENG
3
;
Xiaoping LIU
4
Author Information
1. National Institute for Radiological Protection, Chinese Center for Disease Control and Prevention, Beijing 100088 China.
2. Qingdao municipal hospital, Qingdao 266071 China.
3. Institute Of Occupational Medicine Of Jiangxi, Nanchang 330006 China.
4. Beijing Topgrade Medical Equipment Co., LTD, Beijing 102600 China.
- Publication Type:OriginalArticles
- Keywords:
Positron emission tomography;
Magnetic resonance imaging;
Attenuation correction;
Transmission scan
- From:
Chinese Journal of Radiological Health
2024;33(5):499-504
- CountryChina
- Language:Chinese
-
Abstract:
Objective To propose a method for correcting the attenuation of positron emission tomography (PET) data in PET/magnetic resonance (MR) based on transmission scan, and to improve image quality, diagnostic accuracy, and lesion location accuracy. Methods In this study, the head phantom in the national standard GB/T 18988.1—2013 was used as the experimental model. The head phantom contained three 50 mm diameter cylindrical inserts filled with air, water, and solid teflon. The attenuation correction coefficients were calculated and analyzed based on transmission scan. Results With slice = 33 and theta = 0, the attenuation correction coefficient was the largest (about 7.5) when the coincidence line passed through the axis of the phantom. The spatial distribution of the attenuation correction coefficients clearly showed the positions of air insert and teflon insert, indicating that the attenuation correction coefficients calculated from transmission scan data were accurate. In the clinical verification experiment, the attenuation correction method based on transmission scan significantly improved the image quality and showed efficient attenuation correction. Conclusion This paper studied the attenuation correction method for PET data in PET/MR based on transmission scan. This method can improve the image quality. In the future work, the attenuation correction method of PET/MR will be further studied and optimized to facilitate clinical applications.
