由c、b图可知,对于100psfwhm时间分辨率的结果,伪影、形变和其他性能的退化几乎全部消失,特别是在垂直于平板探测器方向上的图像误差,而且其效果好于环形pet对照组。 实施例2 平板pet设计与步骤不变,对照组条件也不变。 设置四个实验组,分别为时间分辨率为600ps,400ps、200ps、100ps。 设置病灶为六个热源。 重建结...
现有商业系统能够达到200ps的FWHM的重合时间分辨率(CTR),结合TOF(飞行时间)的图像重构,能够使图像PET图像的信噪比和灵敏度进一步提升。尽管如此,为了在低剂量放射性的儿科护理和神经退行性的疾病诸如阿兹海默中使用PET系统进行检测,未来的PET系统需要特别高的灵敏度因此也需要特别高的时间分辨率。这些目标可以通过提高时间分...
本文以30-100ps的时间分辨率为目标,探讨TOF-PET的探测器设计和性能评估.从闪烁晶体和光检测器件出发,讨论了传统PET探测器的闪烁晶体部分的时间分辨率和能量分辨率,指出了传统设计的限制,试探性地给出了TOF-PET探测器闪烁晶体部分的方向.在前端电子电路部分,比较了传统的混合信号处理和全数字信号处理在时间分辨率和能量...
x, y, z) as a function of location in the display system, on the basis of the difference time (? t) between the time the annihilation (this), and sometimes kwantu emissions deekscytacyjnego (te)with tof - pet detector modules contain scyntylatory of distribution capacity below 100 ps...
1、鉴于上述,本发明提供了一种基于深度学习网络的pet系统tof定位方法,能够综合利用cnn良好的局部注意力和transformer优秀的全局注意力,有效提高pet系统的符合时间分辨率。 2、一种基于深度学习网络的pet系统tof定位方法,包括如下步骤: 3、(1)在不同位置处采集大量湮灭事件的sipm(silicon photomultiplier)波形对,并标记每...
However, the CRT value was 410 ps FWHM for the detector module. We have developed a new MPPC based PET detector module improved the timing resolution using a TSV-MPPC array with LCT type and a new ASIC optimized to improve timing performance. This paper describes the construction and the ...
TOF-PET imaging with sub-3 mm resolution and 215 ps coincidence resolving time using digital SiPM based monolithic scintillator detectors in a 70 cm diamet... G Borghi,V Tabacchini,R Bakker,... 被引量: 0发表: 0年 Sub-3mm, near-200ps TOF/DOI-PET imaging with monolithic scintillator ...
The invention is directed to several crystal arrangements for time-of-flight (ToF) positron emission tomography (PET) with depth of interaction (DOI) encoding for high spatial, energy and timing resolution. Additionally, several implementations of the ToF-DOI PET detector arrays are proposed with re...
Time of flight (TOF) measurements in positron emission tomography (PET) are very challenging in terms of timing performance, and should ideally achieve less than 100 ps FWHM precision. We present a time-based differential technique to read out silicon photomultipliers (SiPMs) which has less than ...
In this work, we implemented our HYPR4D kernel method to reconstruct TOF PET data (i.e. PSF-HYPR4D-K-TOFOSEM) acquired on the GE SIGNA PET/MR system which has a TOF resolution of ~400ps [8]. We compared its performance in terms of contrast recovery and noise suppression as well as...