宋天彬,崔碧霄,杨宏伟,马杰,帅冬梅,梁志刚,卢洁,赵国光.一体化PET/MR检查中“热气管征”伪影探讨[J].中国医学影像技术,2019,35(11):1727~1732
一体化PET/MR检查中“热气管征”伪影探讨
Investigation of “hot air spot” artifact in integrated PET/MR examination
投稿时间:2019-03-28  修订日期:2019-06-27
DOI:10.13929/j.1003-3289.201903212
中文关键词:  飞行时间技术  一体化  磁共振成像  正电子发射型体层摄影术  伪影  热气管征
英文关键词:time of flight  integrated  magnetic resonance imaging  positron-emission tomography  artifacts  hot air spot
基金项目:国家重点研发项目(2016YFC0103909)、国家自然科学基金面上项目(81671662)、北京市医管局人才培养计划"登峰"项目(DFL20180802)、国家重点研发项目(2016YFC0103000)。
作者单位E-mail
宋天彬 首都医科大学宣武医院核医学科, 北京 100053  
崔碧霄 首都医科大学宣武医院核医学科, 北京 100053  
杨宏伟 首都医科大学宣武医院核医学科, 北京 100053  
马杰 首都医科大学宣武医院核医学科, 北京 100053  
帅冬梅 首都医科大学宣武医院核医学科, 北京 100053  
梁志刚 首都医科大学宣武医院核医学科, 北京 100053  
卢洁 首都医科大学宣武医院核医学科, 北京 100053
首都医科大学宣武医院放射科, 北京 100053
磁共振成像脑信息学北京市重点实验室, 北京 100053 
imaginglu@hotmail.com 
赵国光 首都医科大学宣武医院神经外科, 北京 100053
北京脑重大疾病研究院癫痫所, 北京 100069 
 
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中文摘要:
      目的 探讨在一体化全身PET/MR检查中"热气管征"伪影具体的发生部位、概率,以及飞行时间(TOF)技术在减轻该伪影方面的应用价值。方法 回顾性分析了105例受检者进行一体化全身PET/MR检查后的"热气管征"伪影出现部位及发生概率情况,同时评价非TOF技术下的一体化全身PET/MR和一体化全身TOF-PET/MR检查图像上"热气管征"出现情况。结果 一体化PET/MR检查中出现"热气管征"伪影的部位分布在鼻窦、气管、胃窦、结肠和直肠,发生率分别为60.00%(63/105)、68.57%(72/105)、8.57%(9/105)、20.00%(21/105)和16.19%(17/105)。非TOF技术一体化PET/MR图像上不同部位的"热气管征"伪影的SUVmax分别为4.09±2.17,1.77±0.81,1.75±0.85,3.73±0.51和11.77±8.39;SUVmean分别为3.19±1.87,1.38±0.70,1.44±0.85,2.68±0.46和6.78±4.19。非TOF技术的一体化全身PET/MR图像上的"热气管征"伪影部位的SUVmax和SUVmean值均高于一体化TOF-PET/MR全身图像上相应部位(P均<0.01)。结论 一体化全身PET/MR检查中"热气管征"伪影主要存在于鼻窦、气管和消化道,其中气管最常见。TOF技术有助于明显减轻一体化PET/MR图像上的"热气管征"伪影,从而显著提高一体化PET/MR检查图像的质量。
英文摘要:
      Objective T To investigate the distribution and occurrence probability of artifact of "hot air spot" in integrated PET/MR examination, and the role of time of flight (TOF) in alleviating the artifact of "hot air spot". Methods The occurrence sites and probability of artifact of "hot air spot" in 105 examinees who underwent integrated whole-body PET/MR examination were retrospectively analyzed, and the occurrence of heat organ sign in integrated PET/MR without TOF technology and TOF-PET/MR images were evaluated. Results The artifacts of "hot air spot" were distributed in sinus, trachea, gastric sinus, colon and rectum, and most commonly in trachea in the integrated PET/MR examination, and the incidence rates were 60.00%(63/105), 68.57%(72/105), 8.57%(9/105), 20.00%(21/105) and 16.19%(17/105), respectively. The SUVmax of different parts on PET/MR images without TOF technology were 4.09±2.17, 1.77±0.81,1.75±0.85,3.73±0.51 and 11.77±8.39, respectively. The SUVmean of different parts on integrated TOF-PET/MR images were 3.19±1.87, 1.38±0.70, 1.44±0.85, 2.68±0.46 and 6.78±4.19, respectively. The SUVmax and SUVmean of artifact of "hot air spot" on PET/MR images without TOF technology were higher than those on integrated TOF-PET/MR images (all P<0.01). Conclusion The artifact of "hot air spot" mainly exists in the sinuses, trachea and digestive tract in integrated whole-body PET/MR examination. The artifact of "hot air spot" in the trachea is the most commonly happened among them. TOF technology can obviously help to reduce the "hot air spot" artifact on the integrated PET/MR examination without TOF technology, thus significantly improving the quality of the integrated PET/MR image.
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