调整螺距对64层螺旋CT冠状动脉成像图像质量的影响

Objective To investigate the impact of imaging quality of pitch on coronary CT angiography (CTA) with 64-detector row CT. Methods 566 patients were divided into four groups according to heart rate (≤ 50,51-70,71 ～ 80 and ≥ 80 bpm). Three dimensional reconstructions were used such as volume rendering (VR) ,maximum intensity projection(MIP) and curved planar reformation(CPR). Each group was divided into control group and cxperimential group randomly, using normal pitch and revised pitch respectively, and the imaging quality and influencing factons were analyzed among the four groups. Results There was significant difference in imaging quality among the four groups (P < 0.05). Each group had difference in imaging quality with normal pitch and revised pitch. Conclusions The revised pitch helps to improve the imaging quality and meet the demand of diagnosis.     

调整螺距对64层螺旋CT冠状动脉成像图像质量的影响

Objective To investigate the impact of imaging quality of pitch on coronary CT angiography (CTA) with 64-detector row CT. Methods 566 patients were divided into four groups according to heart rate (≤ 50,51-70,71 ～ 80 and ≥ 80 bpm). Three dimensional reconstructions were used such as volume rendering (VR) ,maximum intensity projection(MIP) and curved planar reformation(CPR). Each group was divided into control group and cxperimential group randomly, using normal pitch and revised pitch respectively, and the imaging quality and influencing factons were analyzed among the four groups. Results There was significant difference in imaging quality among the four groups (P < 0.05). Each group had difference in imaging quality with normal pitch and revised pitch. Conclusions The revised pitch helps to improve the imaging quality and meet the demand of diagnosis.     

调整螺距对64层螺旋CT冠状动脉成像图像质量的影响

Objective To investigate the impact of imaging quality of pitch on coronary CT angiography (CTA) with 64-detector row CT. Methods 566 patients were divided into four groups according to heart rate (≤ 50,51-70,71 ～ 80 and ≥ 80 bpm). Three dimensional reconstructions were used such as volume rendering (VR) ,maximum intensity projection(MIP) and curved planar reformation(CPR). Each group was divided into control group and cxperimential group randomly, using normal pitch and revised pitch respectively, and the imaging quality and influencing factons were analyzed among the four groups. Results There was significant difference in imaging quality among the four groups (P < 0.05). Each group had difference in imaging quality with normal pitch and revised pitch. Conclusions The revised pitch helps to improve the imaging quality and meet the demand of diagnosis.     

调整螺距对64层螺旋CT冠状动脉成像图像质量的影响

Objective To investigate the impact of imaging quality of pitch on coronary CT angiography (CTA) with 64-detector row CT. Methods 566 patients were divided into four groups according to heart rate (≤ 50,51-70,71 ～ 80 and ≥ 80 bpm). Three dimensional reconstructions were used such as volume rendering (VR) ,maximum intensity projection(MIP) and curved planar reformation(CPR). Each group was divided into control group and cxperimential group randomly, using normal pitch and revised pitch respectively, and the imaging quality and influencing factons were analyzed among the four groups. Results There was significant difference in imaging quality among the four groups (P < 0.05). Each group had difference in imaging quality with normal pitch and revised pitch. Conclusions The revised pitch helps to improve the imaging quality and meet the demand of diagnosis.     

调整螺距对64层螺旋CT冠状动脉成像图像质量的影响

Objective To investigate the impact of imaging quality of pitch on coronary CT angiography (CTA) with 64-detector row CT. Methods 566 patients were divided into four groups according to heart rate (≤ 50,51-70,71 ～ 80 and ≥ 80 bpm). Three dimensional reconstructions were used such as volume rendering (VR) ,maximum intensity projection(MIP) and curved planar reformation(CPR). Each group was divided into control group and cxperimential group randomly, using normal pitch and revised pitch respectively, and the imaging quality and influencing factons were analyzed among the four groups. Results There was significant difference in imaging quality among the four groups (P < 0.05). Each group had difference in imaging quality with normal pitch and revised pitch. Conclusions The revised pitch helps to improve the imaging quality and meet the demand of diagnosis.     

2型糖尿病肝脏脂肪含量与胰岛素抵抗及清除下降的关系:3.0T 1H-MRS研究

目的 观察2型糖尿病(T2DM)、糖耐量异常患者肝脏脂肪含量(LFC)与胰岛素抵抗(IR)及胰岛素清除下降的关系.方法 搜集初诊T2DM患者31例、糖耐量异常者(IGR)31例和健康志愿者(NC)31名,采用3.0TMR质子波谱分析进行LFC检测,口服75g葡萄糖耐量试验(OGTT)和胰岛素、C肽释放试验,用稳态模型(HOMA2)和C肽/胰岛素评估胰岛素抵抗、β细胞功能及胰岛素清除,分析LFC与胰岛素抵抗、胰岛素敏感性、β细胞功能、胰岛素清除的关系.结果 93例准确获得稳定、可诊断质子谱线图;LFC在NC、IGR、T2DM呈逐渐升高,分别为4％、11％和18％ (P ＜0.01);LFC增加,HOMA2-IR呈增加趋势,进入糖尿病阶段,HOMA2-IR显著增加(P＜0.05),HOMA2-％B呈逐渐减低(P＜0.05),胰岛素敏感性降低(P＜0.05);相反地反映胰岛素清除的指标(C肽/胰岛素)则随着LFC增加呈现下降;线性回归分析,LFC与HOMA2-IR呈线性正相关(r=0.319,P＜0.01),与HOMA2-％B(r=-0.564,P＜0.01)、HOMA2-％S(r=-0.303,P＜0.01),C肽/胰岛素(r=-0.519,P＜0.01)呈线性负相关.结论 1H-MRS能有效检测出LFC;LFC增加与胰岛素清除率下降、胰岛素抵抗密切相关,是T2DM的重要因素.     

64层螺旋CT在女性原发性骨质疏松症的临床研究

目的 探讨64层螺旋CT在女性原发性骨质疏松症的临床研究价值.方法 收集临床拟诊为腰椎原发性骨质疏松症的患者912例,进行64层螺旋CT检查,判断骨质疏松的程度和有无骨质疏松引起的病理性骨折.结果 本组研究经行CT检查的912例患者均有不同程度骨质疏松,其中203例患者引起病理性骨折.结论 64层螺旋CT能够判断女性原发性骨质疏松症患者的骨质疏松程度,并能预测其引起病理性骨折的风险.     

CT对急性阑尾炎的诊断价值

急性阑尾炎是临床常见的急腹症之一,但超过1/3的急性阑尾炎病人由于在发病时没有典型的临床表现而易造成误诊[1].     

64层螺旋CT血管造影诊断冠状动脉瘤1例

患者，女，53岁。凶胸闷、心悸2年，进行性加重5天，伴头晕来我院就诊，心内科以“冠心病”收入院。体格检查：T36．5℃，P75次／分，规则，R18次／分，BP160／95mmHg。伴慢性咳嗽，有“慢性支气管炎”病史，2年前患者出现劳累后心前区不适，持续约5—15min，并向肩背部放射，口服硝酸甘油或休息后可缓解。     

1H-MRS分析在颅脑肿瘤研究中的临床应用价值

目的研究脑肿瘤1H-MRS的不同表现及临床应用价值.方法80例行1H-MRS检查并经病理证实或临床追踪证实的脑肿瘤患者,取对侧正常部位对照30例.采用激励法进行单体素波谱采集或二维波谱成像,对有显著性差异的代谢物比值均数比较.结果与对照组相比,脑肿瘤NAA均有不同程度的下降,脑外肿瘤低于脑内肿瘤,高级别(Ⅲ一Ⅳ)胶质瘤较低级者(Ⅰ～Ⅱ)下降明显.Cho/Cr升高,高级胶质瘤比低级胶质瘤高(P＜0.05),高级别胶质瘤及转移瘤瘤体瘤周水肿区Cho/Cr有显著性差异.部分高级别胶质瘤及转移瘤可检测到Lac、Lip峰.部分脑膜瘤(4/19)可检测到Ala峰.结论1H-MRS从微观水平分析脑肿瘤代谢信息的无创性方法,对脑肿瘤的诊断、鉴别诊断及疗效评估、术后复发、组织上分级有重要帮助.