The cumulative dose from an initial noncontrast CT scan followed by a CT perfusion study, for example, isn't easy to assess.
从初诊平扫CT到CT灌注扫描的进一步检查，总剂量可能难以评估。
Methods:Dynamic CT scan was performed in 9 volunteers, measuring the CT value of the same plane of aortic arch and the theoretical threshold was obtained by the time density curve(TDC).
方法：9例志愿者行主动脉弓同层动态增强扫描，利用获得的主动脉弓时间-密度曲线（TDC），寻求触发技术的理论阈值。
Results:Location, size, shape, density, margin and peritumorous edema could be shown by plain CT scan and state of blood flow by enhance CT scan.
结果：平扫可显示肿瘤的发生部位、大小、形态、密度、边缘及瘤周水肿，增强扫描可显示病变的血运情况。
Methods the use of Philips 16-row CT for all patients with lung CT scan and pulmonary enhanced scanning, the use of post-processing software to carry out image analysis.
方法使用飞利浦16排ct对所有患者行ct肺部平扫和肺动脉增强扫描，使用后处理软件行进行图像分析。
When Volume CT scan is processed to industrial product, there are some position and orientation problems. Therefore registration between industrial product's CT slice model and CAD model is necessary.
在对工业产品进行体积CT扫描时，会存在定位偏差问题，所以工业产品CT切片模型与其CAD模型之间的配准是必不可少的。
The geometric error of axial image reconstruction increases with the increase of CT scan slice thickness, due to CT partial volume effect.
重建CT图像的前后方向的几何误差是随着扫描层厚增加而增加，主要是由于CT扫描的部分容积效应影响。
Objective To evaluate the diagnostic value of CT in the spondylolysis of lumbar spine and improve the technique of CT scan.
目的探讨CT在腰椎峡部裂诊断中的临床价值及其扫描技术的改进。
Methods Thirty-five cases of rib fractures were collectively studied by X-ray, regular CT scan, and adoptive 3D reconstruction with spiral CT.
方法收集肋骨骨折35例，分别采用X线摄片、CT扫描及螺旋CT三维重建检查。
Objective to study ct signs of the breast cancer, and to evaluate preoperative ct scan in making diagnosis.
目的明确乳腺癌的CT表现，探讨CT扫描在乳腺癌的诊断及术前检查的价值。
Methods Forty two patients were examined with CT, 11 patients received contrast CT scan. All cases were confirmed by pathology.
方法回顾性分析经手术证实的纵隔占位性病变42例，全部病例均行CT检查，其中11例进行了增强扫描。
Compared with common ct, spiral ct has the features of high scan speed, cover more region and can build varied pictures.
与常规ct比较，多层螺旋CT扫描速度快、覆盖面广，可进行多种方式的图像处理。
Hyperintensity or mixed density was showed on non-contrast CT scan and enhanced in varying degrees on contrast CT scan.
影像学上ct表现为高密度或混杂密度，增强扫描呈不同程度强化。
Methods 16 cases of CT flat esau nasopharyngeal carcinoma patients with suspected by nasal CT scan imaging, read a slice in a double-blind manner.
方法对16例CT平扫疑似鼻咽癌患者进行经鼻腔造影CT扫描，阅片采用双盲法。
Before the fusion of ct and MRI images MRI scan and ct scan for location of X-knife were performed respectively, then MR and ct image were transferred to workstation for the fusion of images.
图像融合前均行颅脑mri薄层扫描及常规X刀术前CT定位扫描，然后将CT和MRI图像资料传输至工作站上进行图像配准和融合。
Conclusion: it is helpful to pay attention to diagnosing the early signs and symptoms, appropriately re examine with CT scan and thin slice CT scan.
结论：注意早期征象，适时CT复查，以及薄层CT扫描对早期诊断有帮助。
Objective To investigate the feasibility of low-do se single-slice helical ct in pulmonary ct scan and evaluate the clinical application.
目的探讨单排螺旋CT行肺低剂量扫描的技术可行性及其应用价值。
Conclusion the ct manifestation of cyst of ischial tuberosity is characteristic, and the ct scan is of great value in the diagnosis of cyst of ischial tuberosity.
结论坐骨结节囊肿的CT表现较有特征性，CT扫描具有极高的诊断价值。
Methods 30 cases examined by radiography ct plain scan and spiral ct 3d reconstruction for pathological changes of jawbone and whole mouth.
方法30例牙与颌骨病变患者分别经口内牙片，口腔全景片，CT平扫及螺旋CT三维重建诊断。
Objective to discuss how to use the ct scan and reconstruction technique of 16 layer spiral ct on diagnosis of acute pancreatitis.
目的探讨如何准确、合理运用16层螺旋CT扫描技术及重建技术对急性胰腺炎的诊断。
Conclusion: the classical ct findings can suggest the diagnosis of pseudomyxoma peritonei. Ct scan may give helpful information in selecting therapy and improving the prognosis of this disease.
结论典型的CT表现可以诊断腹膜假性黏液瘤，CT检查可为临床治疗的选择和改善预后提供有价值的信息。
Enhanced and delayed ct scan not only showed what have been presented in the plain ct scans but also demonstrated 7 cases with external fistula of urine due to injury of collecting systems.
CT增强扫描和延时扫描不仅显示了平扫所见，而且还显示了肾脏收集系统损伤导致尿外渗7例。
CT scan method:cranial routine CT scan, CT perfusion and CTA.
CT扫描方法为CT颅脑平扫、CT灌注扫描及头颈部CTA。
Objective Compared with ct scan method and "bare-bone method" of measuring femoral torsion Angle, to study the reliability of measuring torsion Angle by means of ct method.
目的通过CT法及裸骨投照测量法(以下简称“裸骨法”)测量股骨扭转角的比较，探讨CT测量扭转角的可靠性。
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。
Conclusion CT scan is very CT diagnosis and differenting diagnosis of Obstruction Jaundice.
结论：CT对梗阻性黄疸的诊断与鉴别诊断有很大价值。
Results The image quality and diagnostic accuracy of CT coronal scan proved superior to those of CT axial scan. Conclusion CT coronal scan is th...
结果：冠状位扫描图像质量及诊断准确率优于轴位扫描。
Conclusion: the ct findings of adrenal myelolipoma is Characteristic, and on ct scan the diagnosis could be reached before operation.
结论：肾上腺骨髓脂肪瘤ct表现具有特征性，术前CT即可作出定性诊断。
Methods: All of 30 patients with nasal sinuses cyst were diagnosed by clinical observations, CT scan, operation and pathology, the CT results were analysed.
方法：分析30例经手术及病理证实为鼻窦囊肿患者的CT影像资料。
Methods: All of 30 patients with nasal sinuses cyst were diagnosed by clinical observations, CT scan, operation and pathology, the CT results were analysed.
方法：分析30例经手术及病理证实为鼻窦囊肿患者的CT影像资料。
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