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基于头颅模体的不同重建算法及低剂量扫描对内耳CT成像质量的影响研究
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作者 王晓庆 姜荣 +1 位作者 林思圆 王宁 《中国医学装备》 2024年第6期18-24,共7页
目的:研究不同重建算法下内耳CT成像质量的影响因素,探索不同重建算法降低内耳CT扫描剂量的可行性和应用价值。方法:基于头颅模体分别采用100、80、70、60、50和40mA固定管电流,行横断位多层螺旋容积高分辨率CT(HRCT),每种管电流进行25... 目的:研究不同重建算法下内耳CT成像质量的影响因素,探索不同重建算法降低内耳CT扫描剂量的可行性和应用价值。方法:基于头颅模体分别采用100、80、70、60、50和40mA固定管电流,行横断位多层螺旋容积高分辨率CT(HRCT),每种管电流进行25例次扫描试验,采用不同重建参数进行内耳CT常用的容积再现技术(VRT)、多平面重建(MPR)和最大密度投影(MIP)3种重建技术重建图像,分析对比不同管电流及重建参数对VRT、MPR、MIP图像软组织、骨质、伪影质量评分的影响。由4名从事影像诊断工作5年以上的影像科医师采用盲法对图像质量按0~3分进行图像质量评分。结果:相同管电流下,VRT、MPR和MIP图像的软组织、骨质、伪影质量评分均随重建间隔的增加而逐渐降低,差异均有统计学意义(F=61.853、49.296、71.280,P<0.05);相同重建间隔参数下VRT、MPR和MIP图像的软组织、骨质、伪影质量评分均随扫描时管电流的降低而逐渐降低,差异均有统计学意义(F=16.346、23.632、21.746,P<0.05)。VRT中图像软组织、骨质和伪影质量评分均与管电流呈正相关(r=0.892、0.907、0.871,P<0.05),与重建间隔呈负相关(r=-0.841、-0.864、-0.866,P<0.05)。结论:内耳CT扫描中,通过减小重建间隔,能有效提升薄层扫描、低剂量扫描的成像质量,进一步降低内耳CT的辐射剂量,在临床上具有应用可行性和临床价值。 展开更多
关键词 内耳ct 辐射剂量 重建算法 低剂量
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内耳高分辨率CT的应用 被引量:10
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作者 包颜明 赵光明 宋光义 《放射学实践》 2004年第7期526-528,共3页
关键词 内耳高分辨率ct 冠状位ct 三维重组 骨迷路 内耳疾病
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梅尼埃病患者前庭小管周围骨质发育的CT影像观察 被引量:11
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作者 熊敏 周定蓉 +1 位作者 姜泗长 张素珍 《临床耳鼻咽喉科杂志》 CSCD 2000年第1期17-18,共2页
目的 :观察梅尼埃病 (MD)患者前庭小管 (VA)周围骨质发育情况。方法 :实验分三组 :正常耳组 ,非MD眩晕组及 MD组。每组 VA均行 CT扫描 ,并测量后半规管至颞骨岩部后面的最短距离 (PP值 )及后半规管至水平半规管的最短距离 (PL值 )。结果... 目的 :观察梅尼埃病 (MD)患者前庭小管 (VA)周围骨质发育情况。方法 :实验分三组 :正常耳组 ,非MD眩晕组及 MD组。每组 VA均行 CT扫描 ,并测量后半规管至颞骨岩部后面的最短距离 (PP值 )及后半规管至水平半规管的最短距离 (PL值 )。结果 :MD患者 VA显影率低 ,PP值明显小于正常耳组及非 MD眩晕组。结论 :VA及其周围骨质发育障碍是 展开更多
关键词 前庭小管 内耳眩晕症ct 周围骨质发育
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Cerebrospinal fluid otorrhea secondary to congenital inner ear dysplasia: diagnosis and management of 18 cases 被引量:9
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作者 Bing WANG Wen-jia DAI +5 位作者 Xiao-ting CHENG Wen-yi LIUYANG Ya-sheng YUAN Chun-fu DAI Yi-lai SHU Bing CHEN 《Journal of Zhejiang University-Science B(Biomedicine & Biotechnology)》 SCIE CAS CSCD 2019年第2期156-163,共8页
Objective:To describe the characteristics of the clinical presentation,diagnosis,surgical methods,and outcomes of patients with otogenic cerebrospinal fluid(CSF)leakage secondary to congenital inner ear dysplasia.Meth... Objective:To describe the characteristics of the clinical presentation,diagnosis,surgical methods,and outcomes of patients with otogenic cerebrospinal fluid(CSF)leakage secondary to congenital inner ear dysplasia.Methods:A retrospective review was performed of 18 patients with otogenic CSF leakage secondary to inner ear dysplasia who underwent surgery in our group from 2007 to 2017 and had a follow-up of at least 4 months.The average length of follow-up was three years.The characteristics of the clinical presentations of all patients,such as self-reported symptoms,radiographic findings,surgical approaches and methods of repair,position of the leakage during surgery,and postoperative course,including the success rate of surgery,are presented.Results:The patients presented mostly with typical symptoms of meningitis,severe hearing impairment,and CSF otorrhea or rhinorrhea.All 18 patients had at least one previous episode of meningitis accompanied by a severe hearing impairment.The preoperative audiograms of 17 patients showed profound sensorineural hearing loss,and one patient had conductive hearing loss.Twelve patients presented with an initial onset of otorrhea,and two had accompanying rhinorrhea.Six patients complained of rhinorrhea,two of whom were misdiagnosed with CSF rhinorrhea and underwent transnasal endoscopy at another hospital.High-resolution computed tomography(HRCT)images can reveal developments in the inner ear,such as expansion of a vestibular cyst,unclear structure of the semicircular canal or cochlea,or signs of effusion in the middle ear or mastoid,which strongly suggest the possibility of CSF otorrhea.The children in the study suffered more severe dysplasia than adults.All 18 patients had CSF leakage identified during surgery.The most common defect sites were in the stapes footplates(55.6%),and 38.9%of patients had a leak around the oval window.One patient had a return of CSF otorrhea during the postoperative period,which did not re-occur following a second repair.Conclusions:CSF otorrhea due to congenital inner ear dysplasia is more severe in children than in adults.The most common symptoms were meningitis,hearing impairment,and CSF otorrhea or rhinorrhea.HRCT has high diagnostic accuracy for this disease.The most common fistula site was around the oval window,including the stapes footplates and the annular ligament. 展开更多
关键词 Cerebrospinal fluid ABNORMALITY High-resolution computed tomography(HRct) Congenital inner ear dysplasia OTORRHEA MENINGITIS
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