HASTE序列在磁共振尿路成像技术的临床应用(1)
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【摘要】目的:探讨HASTE序列在磁共振尿路成像的检查技术及临床应用价值。方法:采用HASTE序列、3D重T2WI技术以及口服或静脉注射利尿剂、对73例病人行磁共振尿路成像。然后对前二者图像进行质量评价,根据逆行尿路造影及术后结果对照分析尿路梗组性疾病的MRU影像学特征,讨论HASTE序列在尿路梗阻疾病中的诊断价值。结果:HASTE序列MRU能清楚显示各类尿路梗组性疾病的形态学改变,尤其对静脉尿路造影(IVU)不能显影者效果更好,73例病人中HASTE序列+常规MRI检查阳性率100%。结论:HASTE序列不受呼吸运动影响,成像质量好,扫描速度快,能更好地显示尿路梗阻部位、程度,与MRI结合能更清晰地诊断尿路梗阻的病因,可满足临床诊断要求。
【关键词】HASTE序列;磁共振尿路成像技术;临床应用
doi:10.3969/j.issn.1006-1959.2010.08.092文章编号:1006-1959(2010)-08-2072-02
【Abstract】Objective:To investigate the HASTE sequence in magnetic resonance urography examination techniques and clinical applications.Methods:Using HASTE sequences,3D-heavily T2WI technology,and oral or intravenous diuretics,of 73 patients were treated with magnetic resonance urography.And then the first two image quality evaluation,according to the results of retrograde urography,and comparative analysis of postoperative urinary tract diseases,stem group MRU imaging features to discuss the HASTE sequences in urinary tract obstruction in the diagnosis of the disease.Results:HASTE sequence MRU can show clearly the various types of stem group of diseases,urinary tract morphological changes,especially for intravenous urography (IVU) can not imaging were better,73 cases of patients with HASTE Conventional MRI sequences+The positive rate of 100%.Conclusion:HASTE sequence without respiratory motion effects,image quality,scanning speed,better able to show parts of urinary tract obstruction,extent,and MRI diagnosis of the binding energy more clearly the cause of urinary tract obstruction can meet the clinical diagnostic requirements.
磁共振尿路成像(Magnetic Resonance Urography,MRU)是近年发展并广泛应用于临床的一种非损伤且不需造影剂即可显示肾收集系统、输尿管、膀胱磁共振成像技术,本文目的是对HASTE(half-fourier acquisition single-shot-turbo-SE,HASTE)序列在磁共振尿路成像技术的临床应用价值进行初步的探讨。收集我院2006年10月至2009年8月开始采用HASTE序列、3D重T2WI技术对73例病人行磁共振尿路成像,现报告如下。
图片说明:①④为3D重T2WIMRU最大密度投影,显示输尿管全程及狭窄部位较为直观,结石在此图像上被掩盖。②③为HASTE序列图像,图中箭头所示左肾及输尿管多发性结石示。⑤图示涡流所形成的伪影。⑥为先天性输尿管畸形“麻绳扭曲”样改变。
1.资料与方法
1.1临床资料:病人73例,男32例,女41例,年龄23～65岁,平均42岁。其中无尿路梗阻症状者13例,有尿路梗阻症状者42例。
1.2成像方法及参数:患者检查前晚8点后禁食,根据临床初步诊断无梗阻或轻度梗阻者检查前10分钟肌注速尿10～20mg或检查前2小时口服速尿。所有患者均采用Siemens Avanto 1.5T超导型MR扫描机检查,在屏气梯度回波序列做MR常规成像后,采用快速自旋回波序列,3D重T2WI冠状位成像,回波链(ETL)16-32,应用呼吸导航,TR为1800ms,有效TE为678ms,视野(FOV)32-36cm,激励次数(NEX)为2次,层厚为1 ......
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