helical scan

Fashion scan on-the - spot coordination ; publication scan the " yellow spot " characteristic of human sight and transmitting pictures by means of helical scan

视觉的黄斑特性与螺旋扫描方式传输图象

It adopts the helical scan to eliminate the material function and the change reference plane law has realized the precision high three dimensional modelling using API provided by SolidWorks and VB .

利用SolidWorks的应用程序开发接口（API）结合VB语言采用螺旋扫描除料函数和改变参考平面法实现了精确度较高的三维造型。

Objective : To contrast data of reconstruction in lung helical scan and general CT scan , to evaluate the value of its clinical application .

目的：对肺部螺旋CT扫描重建资料与CT平扫进行对比，探讨临床应用价值。

In order to enlarge the field of view of cone-beam CT , helical scan mode and off-centered scan mode were used .

为了扩大锥束视野的成像视野，人们采用了螺旋锥束扫描模式和偏置锥束扫描模式，分别用来扩大轴向视野和横向视野。

Each X-ray source is equipped with a multi-row detector . During the scan , all sets of sources and detectors rotate simultaneously and follow the helical scan locus .

其中每个X源都对应于多排检测器；扫描时，多组源-检测装置同步旋转，构成螺旋线形的扫描轨迹。

Results Low - dosage helical CT scan provides excellent images .

结果在低剂量螺旋CT扫描时，扫描图像仍然清清晰，扫描信息完整。

Clinical application value of helical CT scan in acute superior mesenteric blood vessel infarction

螺旋CT扫描在急性肠系膜上血管梗塞中的临床应用价值

Helical CT scan : Application in the diagnosis of reno cellular carcinoma

螺旋CT在诊断肾细胞癌中的应用

Comparison study of helical CT scan , 3D image reconstruction and general CT scan in lung diseases

螺旋CT及三维成像技术与常规CT平扫在肺部疾患应用中的对比研究

Objective To explore the value of helical CT scan to the diagnosis of ureteral calculus .

目的评价螺旋CT平扫对输尿管结石诊断的价值。

Helical CT scan technique of acute abdomen

急腹症螺旋CT扫描技术

Helical CT scan images were obtained in the vascular phase and the maximal hepatic enhancement phase .

对所有患者均进行双螺旋CT扫描，分别获取血管相和肝脏最大强化相影像。

Conclusion Helical CT scan has a notable advantage on characterization and diagnosis of thyroid masses .

结论螺旋CT检查在显示甲状腺内肿块以及对肿瘤定性诊断方面有非常大的优越。

Application of multi-phasic helical CT scan in the diagnosis of gall bladder carcinoma

螺旋CT多期增强在胆囊癌诊断中的作用

Methods Helical CT scan was performed on 45 patients with clinically or pathologically proved idiopathic pulmonary fibrosis .

方法收集经临床病理证实的IPF45例，全部行螺旋CT检查，其中25例对兴趣区追加高分辨率CT扫描。

Materials and Methods : 42 patients with ureterolithiasis were undergone both helical CT scan and MPR .

材料和方法：对42例输尿管结石的患者行螺旋CT扫描并行多平面重建（MPR），其中4例行增强延时扫描。

Conclusion The multi phasic helical CT scan is superior to the conventional CT in the diagnosis of small RCC .

结论螺旋CT多期扫描在小肾癌的诊断中较常规CT有明显优越性；

Objective To study the clinical application value of multiphase helical CT scan in discription of the characteristics of hepatocellular carcinoma ( HCC ) .

目的探讨肝癌螺旋CT多期扫描影像特征和临床应用价值。

OSEM-Based Helical Half Scan Reconstruction

基于有序子集期望最大化的螺旋半扫描重建

Materials and methods : 31 cases of constrictive pericarditis proved by operation underwent helical CT scan . the CT features were analyzed and compared with operation findings .

方法：对31例手术病理证实的缩窄性心包炎患者进行螺旋CT检查，分析其CT表现特点并和手术发现对比。

Seventy-two patients with SPN were studied with dynamic helical CT scan , and the method of image selection and reconstruction was used to improve the slice concordance in measurement of delayed images respectively .

对72例SPN患者行螺旋CT动态增强扫描，运用一定的选层重组的方法保证各延时像测量层面的一致性。

Methods 37 patients with upper urinary tract obstructive diseases underwent thin slice helical CT scan and 3 dimentional reconstruction of the urinary tract as well as 3 dimentional CT angiography when needed .

方法对37例上尿路梗阻患者进行螺旋CT薄层扫描和尿路三维重建，必要时行CT血管造影。

Methods : Helical CT scan , multiplanar three-dimensional reconstruction and CT virtual endoscopy 29 were performed in patients with larynx lesions . Their results were compared with fiber-optic laryngoscopy and pathological findings .

方法：29例喉部病变进行螺旋CT扫描、多平面三维重建及CT仿真内窥镜成像，并与纤维喉镜及病理对照研究。

Methods In 22 patients with 44 hips , 15 patients with hip dysplasia and 7 with fractures , were examined with helical CT scan and performed 3 D reconstruction in three methods : ① threshold method ;

方法对22例44个髋关节进行临床诊断：髋关节发育不良15人，髋关节骨折7人。螺旋CT扫描后进行三维立体重建，然后分别使用：①阈值（Threshold）分离法；

Forty-six cases of SPN with pathological and ( or ) clinical results were studied with dynamic helical CT scan . Pre-and post-contrast attenuation , peak height of time-attenuation curve , and ratio of peak height of the SPN to that of the large artery were evaluated .

并对其中46例经病理及临床证实的SPN的CT动态增强特点进行评价，评估其增强前后的CT值、强化峰值、SPN与主动脉的强化值比。

Helical Double-phase CT Scan Imaging Features of Hepatocellular Carcinoma and Pathology of False-positive Lesions

肝癌螺旋CT双期增强扫描影像学特征及CT假阳性病灶的病理分析

All the cases underwent plain and enhanced scan , of which the six did helical dynamic enhanced scan .

全部病例均作CT平扫加增强扫描，其中6例行螺旋动态增强扫描。

Conclusion The multi-slice helical isotropic CT scan and post-processing images are of great value in the study of cervical spine .

VRT的椎间孔显示与平片无差异。结论应用颈椎CT各向同性扫描基础进行图像后处理，对于颈椎的形态学研究具有重要的价值。

Methods : Sixty-two patients of vertebral fractures were examined with helical CT thin scan ( 2 ~ 3mm ) . After data were transferred to computer workstation , MPR and 3D images were reconstructed .

材料与方法62例脊椎骨折患者行螺旋CT薄层扫描（2～3mm）检查，并在工作站行MPR和3D图像重建。

Objective To study the effect of helical CT scanning dose and slice thickness on lung density , and to determine whether the lung density value measured by standard dose helical CT scan can be used for low dose helical CT scan .

目的探讨螺旋CT扫描剂量、层厚是否对肺密度有影响，以决定常规剂量螺旋CT扫描测得的肺密度值能否适用于低剂量螺旋CT。