【摘 要】
：
PURPOSE CT examination is an important method to dignose of urinary calculi,but the radiation dose is the main factor restricting its development,more and more people pay attention to low-dose CT.Howe
【机 构】
：
The First Affiliated Hospital of Anhui Medical University
【出 处】
：
中华放射学学术大会2016、中华医学会第23次全国放射学学术大会暨中华医学会第24次全国影像技术学术大会
论文部分内容阅读
PURPOSE CT examination is an important method to dignose of urinary calculi,but the radiation dose is the main factor restricting its development,more and more people pay attention to low-dose CT.However,low-dose CT reduce the image quality at the same time,which will affect clinical diagnose.To compare the image quality of urinary CT using adaptive statistical iterative reconstruction(ASIR)at low-dose,and to evaluate the feasibility of low-dose CT in the diagnosis of urinary calculi METHOD AND MATERIALS 56 patients with clinically suspected urolithiasis were randomly divided into two groups(conventional-dose group and low-dose group,each containing 28 patients).Automatic tube current modulation scanning was used,with a noise index setting of 13 in conventional-dose group CT scans,and 25 in low-dose group CT scans.Image were reconstructed with filtered back projection(FBP)and different settings of ASIR(20%、40%、60%、80%).The calculi(number、location、size)was analysis,image quality(scale,1-5)、confidence levels for diagnose(scale,1-3)、image noise were evaluated and compared by two radiologists independently,and effective dose(ED)was calculated.
其他文献
目的 探讨高场强磁共振成像(MRI)对卵巢浆液性及粘液性囊腺瘤诊断意义及其表现特征.方法 回顾性分析32例经手术、病理证实的卵巢浆液性及粘液性囊腺瘤MRI影像资料.结果 32例卵巢囊腺瘤共36个肿瘤,浆液性15例17个肿瘤,粘液性17例19个肿瘤,其中良性27个,交界性或恶性变9个.9个为单囊病灶,信号均匀,27个为多囊多房性病灶,囊内有分隔,呈多房、囊套囊状等,病灶信号多不均匀.良性表现为囊壁光
目的 分析后巩膜炎(PS)的多参数磁共振成像(MP-MRI)表现特征,探讨MP-MRI对该病的诊断价值.方法 回顾性分析2013年1月至2015年12月间经眼内细针抽吸活检(FNAB)确诊的PS患者17例27只眼,所有患者行常规MRI、长可变回波链分段读出扩散加权成像又称高分辨率扩散加权成像(RESOLVE DWI)、增强MRI和B超检查.结果 MP-MRI检查结果显示,PS病灶呈结节型(6例7只
Objective To evaluate the possible changes of total and regional areas in the corpus callosum(CC)of first-episode schizophrenic patients of early adulthood onset and to explore the relationship betwee
We present a case of alveolar soft part sarcoma (ASPS) of the left thigh with lung metastasis in a 35-year-old female.A palpable mass was detected in her lower extremity one year ago and MRI examinati
目的 探讨CT增强扫描时有效预防碘造影剂渗漏的护理措施及发生外渗后的正确处理方法.方法 390例CT增强的患者，采用高压注射器经外周静脉通道注入碘造影剂[如：优维显(370 mgI/ml；典迈伦(400 mgI/ml)等].结果 390例患者中发生外渗8例(1.33％)，其中大量外渗l例(碘造影剂渗出大于50 ml)；中等量外渗6例(碘造影剂渗出大于20 m1)；少量外渗8例(碘造影剂渗出少于10
目的 分析导管内乳头状瘤的MRI表现,比较导管内乳头状瘤与浸润性导管癌的ADC值.方法 收集解放军总医院2014年9月-2015年6月经病理证实的导管内乳头状瘤51个病变(伴有不典型增生病灶13个,实性乳头状癌1个,不伴有不典型增生37个),同期术前影像评估为5类的浸润性导管癌291个病灶进行对比分析.结果 导管内乳头状瘤年龄42±14岁,病变处理方式：活检8个,肿块切除38个,保留乳头乳晕的乳腺
PURPOSE To evaluate the feasiblity of low-dose CT combined with adaptive statistical iterative reconstruction(ASIR)in the diagnosis of urinary calculi METHOD AND MATERIALS 70 patients with clinically
Acute pancreatitis (AP) is a complex disease which results in significant morbidity and mortality.For many decades it has compelled researchers to explore the exact pathogenesis,but unfortunately they
目的 探讨SPIO-shRNA分子探针在活体荷瘤裸鼠MR成像的最佳扫描时间.方法 探针注射浓度为含铁18mg/kg；将30只BALB/c荷瘤裸鼠随机分为6组，每组5只分别于探针注射前及注射后12h、24h、27h、30h、36h等6个时间点行MR检查，并测量肿瘤组织及肌肉组织在各时间点的信号强度变化；每次检查完成后立即处死裸鼠，取出肿瘤组织及肌肉组织行HE及普鲁士蓝染色，并在光学显微镜下观察.结果
目的 探讨TBL(Team-based learning)教学法在医学影像学实习生教学中的效果.方法 将分配至我院放射科实习的学生随机分为两组，实验组与对照组，实验组采用TBL教学法，对照组采用LBL教学法，通过影像诊断阅片、问卷调查和试卷考试评估两种方法的教学效果.结果 影像诊断阅片时：3分以上实验组占83.3％，对照组占63.4％，具有统计学意义(P＜0.05)；问卷调查：除学习时间充足外(P