摘要
在正电子发射断层扫描成像/计算机断层扫描成像(PET/CT)扫描时,患者的呼吸运动造成胸腹部图像的伪影。呼吸运动伪影使得PET图像质量下降,肿瘤体积的估计值偏高,肿瘤组织的放射性定量分析不准确,因此严重影响胸腹部肿瘤的诊断和治疗计划的制定。PET/CT图像的呼吸运动伪影校正问题成为了近年来的一项重要课题。综述现有的PET/CT图像呼吸运动伪影校正方法,主要包括呼吸门控技术、基于图像配准的方法、基于图像重建和原始数据的方法,以及基于反卷积的图像恢复方法。在展望研究发展趋势的同时,就某些方法提出了可能的改进方案。
In PET/CT imaging, patient respiratory motion can cause significant artifacts in thoracic and upper abdomen area. Respiratory motion artifacts substantially degrade PET images and increase the apparent volume of malignant lesions, result in reduced activity and signal-to-noise ratios within the tumor region, therefore often lead to inaccurate diagnoses and treatment planning for tumors within thoracic and abdomen. Respiratory motion compensation in PET/CT imaging has been an important research area in the past decade. This paper presents a review of the existing methods applied to compensate the respiratory motion and suppress motion artifacts in PET/CT imaging. Typical respiratory gate or synchronization techniques, registration-based algorithms, raw data or reconstruction-based algorithms and deconvolution-based algorithms were introduced and compared respectively. Finally a summary and several promising approaches could be employed to correct the respiratory motion artifacts were given.
出处
《中国生物医学工程学报》
CAS
CSCD
北大核心
2009年第4期573-580,共8页
Chinese Journal of Biomedical Engineering
关键词
PET/CT
呼吸运动
呼吸运动伪影
呼吸运动补偿
PET/CT
respiratory motion
respiratory motion artifacts
respiratory motion compensation
