Objective To explore the effect factors on the related measurement guidelines of renal area and renal cortex thickness by measurement of CT/MRI radiography in vivo kidney in adults. Methods Thickness of renal cortex (TC), cortical area (CA), parenchymal area (PA), as well as cortical faction (CF, cortical/parenchymal area) of 164 cases (106 cases with enhanced CT abdomen and 58 cases with MRI abdomen scanning) without renal disease was calculated bilaterally. All data were analyzed by SPSS 11.5 (the mean of two groups and multi-groups was compared by t test and analysis of variance, respectively).Results ① In CT scan, the mean value and 95% confidence interval of TC，CA，PA and CF were 0.62 (0.44 to 0.80) cm, 7.2 (4.1 to 10.2) cm2, 18.2 (10.7 to 25.7) cm2, 39.3 (30.3 to 48.3) % on the left, and 0.63 (0.43 to 0.83) cm, 7.3 (4 to 11) cm2, 18.1 (11 to 25.3) cm2, 39.9 (32 to 48) % on the right, respectively. Likewise, in MRI, those were 0.58 (0.33 to 0.83) cm, 7.5 (3.5 to 11.3) cm2, 14.8 (8.5 to 21.1) cm2, 50.2 (32.8 to 67.6) % on the left, and 0.55 (0.31 to 0.79) cm, 7.3 (4.4 to 10.3) cm2, 15.6 (10.1 to 21.1) cm2, 47.3 (30 to 65) % on the right. ② There was a significant difference in the value of TC, CA, PA between different gender and age groups, and were decreased with the age increaseing. ③ Most of the values measured by MRI were less than those by CT. Conclusions The study suggests that the values of TC, CA, PA and CF can well represent the renal size and function, and may offer a practical and significant normal standard in the radiological diagnosis.
目的:探讨单发脑转移瘤的CT和MRI诊断价值。方法:回顾性分析37例经手术病理证实或临床综合诊断确诊的单发脑转移瘤的CT和MRI表现。结果:病灶位于幕上31例,分布于皮髓质交界区21例。囊实性22例,实性9例,囊性6例。不规则环形强化13例,结节形强化7例,囊实形强化15例,均匀强化2例。病灶直径gt;1.0 cm时瘤周水肿常较明显。结论:单发脑转移瘤的CT、MRI表现具有一定的特征,增强扫描对诊断单发脑转移瘤有重要价值。
目的:探讨头颈部数字减影CT血管成像(DSCTA)成像技术的方法。方法:随机选择12例作头颈部脑血管DSCTA病例,通过扫描前训练、缩短扫描时间以减少患者运动,取得增强前后位置一致的横断图像。采用CT机自带的软件进行图像减影处理。采用减影后的图像进行三维后处理。结果:12例患者头颈部血管减影成功,取得了良好血管减影图像。结论:科学的DSCTA检查技术可获得良好的头颈部血管性病变减影图像
目的:探讨粟粒性肺结核、尘肺和粟粒性肺转移瘤的HRCT表现及鉴别特征。方法:回顾性分析经本院临床证实的38例粟粒性肺结核,33例尘肺和41例粟粒性肺转移瘤的常规CT及HRCT资料,观察结节的大小、分布特点,统计分析三者的差异。结果:38例粟粒性肺结核中,结节全肺野和内、中、外带分布均匀者分别为32例(84.2%)和29例(76.3%),33例(86.8%)以全小叶分布为主。33例尘肺中,结节以中、上肺野和内中带分布为主者分别为30例(90.9%)和31例(93.9%),28例(84.8%)以小叶中心分布为主。41例粟粒性肺转移瘤中,结节以中下肺野和中、外带分布为主者分别为37例(90.2%)、34例(82.9%),36例(87.8%)以小叶实质分布为主。结核、尘肺及肿瘤结节大小均匀分别为31例(81.5%)、9例(27.3%)、6例(14.6%);边界清晰者分别为36例(94.7%)、31例(93.9%)、39例(95.1%);合并有磨玻璃征者分别为34例(89.4%)、7例(21.2%)、21例(51.2%)。结论:HRCT能够很好地显示粟粒性肺结核、尘肺及粟粒性肺转移瘤结节的分布特点,在诊断和鉴别诊断这三种粟粒性疾病中具有重要价值。
摘要:目的:探讨16层螺旋CT图像后处理技术对青少年特发性脊柱侧凸的胸椎旋转和椎弓根径线变化特点及临床价值。 方法:收集经临床诊治的青少年特发性脊柱侧凸20例,运用16层螺旋CT扫描及图像后处理技术,进行相关CT数据测量统计。结果:(1)脊柱胸椎侧凸的顶椎及邻近椎体均向凸侧旋转、后份向凹侧旋转,以顶椎旋转最重,且凹侧椎弓根径线小于凸侧,与侧凸程度及方向具有相关性。(2)上、下终椎椎体旋转及椎弓根径线变化则较复杂,其椎体无旋转或向相反方向旋转,椎弓根径线可凸侧小于凹侧,以上终椎明显。结论:16层螺旋CT及图像后处理技术,对显示青少年特发性脊柱侧凸胸椎旋转及椎弓根径线变化特征,可提供临床拟订手术方案的重要影像学依据。
目的:探讨腰椎峡部裂性滑脱的多层螺旋CT特征及其价值。方法 收集经临床诊治的腰椎峡部裂性滑脱30例CT资料进行回顾性分析。结果 多层螺旋CT能清晰显示腰椎峡部裂性滑脱的椎弓峡部裂、椎体滑脱程度、椎间盘及椎管等CT特征。结论 多层螺旋CT是腰椎峡部裂性滑脱的优良影像学检查方法。
To analyze the CT features of solid pseudopapillary tumor of pancreas (SPTP), and correlation with the pathological findings of the disease so as to improve the diagnostic abilities, the CT images and the clinical manifestations, we retrospectively analyzed the pathological materials of 23 cases with surgery and pathology proved SPTP. In the 23 patients, 21 cases were female (91.3%) and 2 were male (8.7%). The most common symptom was abdominal discomfort with dull pain in 12 patients (52.2%). Others included the pancreatic mass that was detected incidentally during physical examination in 9 patients (39.1%), nausea/vomiting in 2 patients (8.7%). And 1 case of female patients had 2 lesions. In the 24 tumors, 6 cases were located at the head (25.0%), 3 were at neck (12.5%), 8 cases were at body (33.3%), and 7 cases were at tail of pancreas respectively (29.2%). The long-axis diameter ranged from 2.1cm to 20.1cm (mean 6.4cm). 9 tumors were mostly solid component (37.5%), 10 tumors were contained similar proportion of solid and cystic part (41.7%), and mainly cystic components in 5 tumors (20.8%). In 9 of the 23 patients, calcification was found in the tumor (39.1%). In 2 of the 23 patients, bleeding was seen in the mass (8.7%). The dilation of intrahepatic bile duct was found in 1 patient (8.7%). Liver metastasis was showed in one patient (8.7%). On post-contrast CT scan, solid parts demonstrated mild enhancement at the arterial phase. At the portal phase, solid parts were enhanced continuously in all cases, and the enhancement degrees were lower than normal pancreatic tissue. The cystic parts of all lesions showed no enhancement. Pseudo papillary structure, hemorrhage, necrosis, or cystic degeneration were found in all patients by histological study. In a word, SPTP has comparatively characteristic CT imaging features consistent with histological features, when combined with clinical manifestations, could be correctly diagnosed and differentially diagnosed.