使用Q. clear和osem重建技术评估转移性乳腺癌患者fdg-pet/ct图像分辨率和量化参数

IF 0.6 Q3 Medicine
Tshetiz Dahal, Bimal Nepal
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引用次数: 0

摘要

我们比较了2-[18F]FDG-PET/CT扫描用于转移性乳腺癌患者反应监测的前瞻性设置,使用有序子集期望最大化(OSEM)算法和贝叶斯惩罚似然重建算法(Q.Clear)以及图像质量和量化参数。本研究纳入35例接受2-[18F]FDG-PET/CT治疗并随访的转移性乳腺癌患者。在不使用Q.Clear和OSEM重建算法的情况下,总共150次扫描以五分制对图像质量参数(噪声、清晰度、对比度、诊断置信度、伪影和斑点外观)进行评估。在可检测疾病的扫描中,考虑到两种重建技术的兴趣水平,选择具有最大兴趣体积的病变。对于同一加热病变,比较SULpeak (g/mL)和SUVmax (g/mL)。OSEM重建的斑点外观明显少于Q.Clear重建,而两种方法在噪声,诊断置信度或伪影方面没有显着差异。Q.Clear的清晰度明显更好(p <0.002)和对比度(p <0.002),高于OSEM重建。75/150扫描的定量检查显示,Q.Clear重建在SULpeak方面明显优于OSEM重建(6.33±1.8 vs. 5.85±1.5,p <(7.27±5.8 vs. 3.90±2.8,p 0.002)。综上所述,OSEM重建的斑点较少,而Q.Clear重建的清晰度更高,对比度更好,SUVmax和SULpeak也更高。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Evaluation of image resolution and quantification parameters on fdg-pet/ct images in patients with metastatic breast cancer using Q. clear and osem reconstruction techniques
We compared the 2-[18F]FDG-PET/CT scans performed for response monitoring in patients with metastatic breast cancer in a prospective setting using the ordered subset expectation maximization (OSEM) algorithm and the bayesian penalized likelihood reconstruction algorithm (Q.Clear) and the image quality and quantification parameters. 35 patients with metastatic breast cancer who were treated and followed up with 2-[18F]FDG-PET/CT were included. A total of 150 scans were evaluated on a five-point scale for the image quality parameters of noise, sharpness, contrast, diagnostic confidence, artefact, and blotchy look while being blinded to the Q.Clear and OSEM reconstruction algorithms. In scans with detectable disease, the lesion with the highest volume of interest was chosen, taking into account both reconstruction techniques' interest levels. For the same heated lesion, SULpeak (g/mL) and SUVmax (g/mL) were contrasted. The OSEM reconstruction had significantly less blotchy appearance than the Q.Clear reconstruction, while there was no significant difference between the two methods in terms of noise, diagnostic confidence, or artefact. Q.Clear had significantly better sharpness (p &#60; 0.002) and contrast (p &#60; 0.002) than the OSEM reconstruction. Quantitative examination of 75/150 scans revealed that Q.Clear reconstruction considerably outperformed OSEM reconstruction in terms of SULpeak (6.33 ± 1.8 vs. 5.85 ± 1.5, p &#60; 0.002) and SUVmax (7.27 ± 5.8 vs. 3.90 ± 2.8, p 0.002). In conclusion, OSEM reconstruction was less blotchy, but Q.Clear reconstruction showed superior sharpness, better contrast, higher SUVmax, and higher SULpeak.
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来源期刊
CiteScore
0.90
自引率
0.00%
发文量
226
审稿时长
3 months
期刊介绍: Indian Journal of Otolaryngology and Head & Neck Surgery was founded as Indian Journal of Otolaryngology in 1949 as a scientific Journal published by the Association of Otolaryngologists of India and was later rechristened as IJOHNS to incorporate the changes and progress. IJOHNS, undoubtedly one of the oldest Journals in India, is the official publication of the Association of Otolaryngologists of India and is about to publish it is 67th Volume in 2015. The Journal published quarterly accepts articles in general Oto-Rhino-Laryngology and various subspecialities such as Otology, Rhinology, Laryngology and Phonosurgery, Neurotology, Head and Neck Surgery etc. The Journal acts as a window to showcase and project the clinical and research work done by Otolaryngologists community in India and around the world. It is a continued source of useful clinical information with peer review by eminent Otolaryngologists of repute in their respective fields. The Journal accepts articles pertaining to clinical reports, Clinical studies, Research articles in basic and applied Otolaryngology, short Communications, Clinical records reporting unusual presentations or lesions and new surgical techniques. The journal acts as a catalyst and mirrors the Indian Otolaryngologist’s active interests and pursuits. The Journal also invites articles from senior and experienced authors on interesting topics in Otolaryngology and allied sciences from all over the world. The print version is distributed free to about 4000 members of Association of Otolaryngologists of India and the e-Journal shortly going to make its appearance on the Springer Board can be accessed by all the members. Association of Otolaryngologists of India and M/s Springer India group have come together to co-publish IJOHNS from January 2007 and this bondage is going to provide an impetus to the Journal in terms of international presence and global exposure.
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