CT理论与应用研究

Examining Quality of Retaining Wall Made of Mortar and Stones by Means of Comparing Spectrum of Elastic Reflection Wave Frequncy

ZHONG Shi-hang

2002, 11(1): 1-5.

Abstract(1511) PDF(0)

Abstract:
There are much more retaining wall made of mortar and stones in railway lines, road lines and the other engineering objects. How to examining their quality? The author had test the velocity of elastic reflection wave, Rayleigh surface wave method and Comparing the spectrum of frequency of elastic reflection wave, and had elected comparing the spectrum to examining retaining wall for 5 km in length, because this method have some specialties,such as high resolution, non-interference from materials of mortar and stones, and easiness getting the data.

The Character Analysis of True and False Approximate Resistivity Anomaly in Numerical Modeling of 3-D Geo-electrical Model

QIANG Jian-ke, XIONG Bin, RUAN Bai-yao

2002, 11(1): 6-9.

Abstract(1430) PDF(0)

Abstract:
This paper presents a dissection method with the double net system in the finite element method for 3-D numerical modeling of resistivity sounding.By the computation of several typical models using 3-D FEM with homogeneous conductivity and potential interpolated with a trilinear function in each block, we gave the distribution rules of true and false approximate resistivity anomaly with symmetrical four electrodes, analyzed the cause of true and false anomaly, and studied the relation both the general shape of the true anomaly and the position of geological body which produced true anomaly.

The Identification of A Light Substance Based On Digital Radio-Graph Technology

HAN Yu-sheng, LUO Ya, DING Hou-ben, SHAO Li-kang, LIAO Nan, ZHU Ping-an

2002, 11(1): 10-12.

Abstract(1388) PDF(1)

Abstract:
The paper introduces how to use Digital Radio-Graph technology to identify a light substance. It is proved by practice that the method is reasonable and effective and feasible and can enhance the ability to identify a light substance.

Medical Image Archive and Communication Solution

ZHAO Wei-dong, RUAN Chang-jing

2002, 11(1): 13-16.

Abstract(1432) PDF(1)

Abstract:
In this paper, we offer four efficient solutions: filmscan, video capture, CD or MOD input and DICOM connection, to solve the problem for Medical Image (CT) archiving and management. These solutions not only solve the problem of long-term images storing and archiving, but also offer the convenient and efficient management tools, simple and fast query tools, multifunctional image display processing tools and multifunctional image-text report tools. Both of the systems are also equipped with Dicom Network Interface and Laser Film Printer Network Interface.

The New Advances of CT Machine,Image After-treatment Techniqueand and Related Information

HE Ping-xia, ZHANG Yu-hua

2002, 11(1): 44-47.

Abstract(1826) PDF(4)

Abstract:
1) Advancement of CT machine: Since CT machine has been applied, with unceasing development of computer technique, detector technique, X-ray technique and new micro-electron and micro-technique have been used, thereby performance of computerized X-ray tomography machine has been improved greatly, it is era-changing identification of computerized X-ray tomography scan from bed plane scan to spiral scan. 2)The image after-treatment technique: With emergence of spiral computerized X-ray tomography and exploitation of computer software, this new kind of imaging method that means VE has been paid attention to widely that making up images of three dimension simulation endoscope bv means of guidance technique.

Significince of Pattern and Expressions of CD₄₄V₆ in Larygeal Carcinomas

SUN Wei-ying, YUAN Jian-hua, SHI Ming-ying

2002, 11(1): 17-19.

Abstract(1430) PDF(0)

Abstract:
Objective To investigate the significince of CT pattern and expressions of metastasis factors CD₄₄V₆ in larygeal carcinoma. Methods CT senning and expressions of CD₄₄V₆ were done in 39 patients with larygeal carcinoma. Results CT pattern: glotlis calegory (24/39)、 over glotlis category (14/39) and cross glotlis culegory (1/39), T_1-2(22/39)、 T_3-4(17/39),lymph node metastasis (13/39) no lymph node metastasis (24/39). Positive immunoseactivity of CD₄₄V₆ were 61.5% in 39 cases. Expressions of CD₄₄V₆ were distinel deffesence in T classification and lymph node metastasis (p<0.01), and nl deffesence in position. With adet testing analycine. Conclusions CD₄₄V₆ Positine expressions were closely associated with T classification and lymph node metastasis in larygeal carcinoma.

A Study on the Curative Evaluation of Demacular Cosmetics by Skin Image Analysis System

MENG Ru-song, CAI Rui-kang, ZHAO Guang, MA Hui-jun, ZHOU Fu-gen, JIANG Zhi-guo, ZHAO Yu

2002, 11(1): 20-25.

Abstract(1680) PDF(8)

Abstract:
objective: to obtain the distinct image of various pigment dermatosis, and develop The skin image analysis system with uncomplicated operation, high automatic and accuracy. Method: The parameters of measured skin lesion, such as the shape, the acreage, the integrative optical density and changes of pigment etc were detected by poly spectrum polarized light and digital image analysis system. Results: 136 cases of chioasma were treated with demacular cosmetics or drugs and quantified by the system. The parameters of treatment groups greatly declined as time went by. the parameters of the drug group declined significantly more than those of the control group (P<0.05).The objective unit-the value of ID was put forward. Conclusion: the image analysis system was proved to be a kind of high potential quantitative means to deal with skin surface pigment. It is harm less to measured skin lesions with high sensitivity, good objectivity and repeativity. The great satisfied clinical effects were reached.

Achievement and Study of Three-Dimensional Structure to Pigmented Nevus

MA Hui-jun, ZHAO Guang, MENG Ru-song, JIANG Zhi-guo

2002, 11(1): 26-29.

Abstract(1331) PDF(1)

Abstract:
Taken from 2 paraffin embedded tissues, pigmented nevi were cut into serial histologic sections. The expression of nevus cell and basement membrane were respectively applied by S-100 and IV collagen antibody with LAB-SA immunohistochemical technique. Information was inputted into computer after the processes of spelling and recognizing. By the technique of reconstruction, the 3D stereo pigmented nevus models were retrieved from 2Ddigital data. Maybe it will provide a new method and thought for teaching and therapy to pigmented nevus.

Preliminary Application of Muitisiice CT in Central Pulmonary Embolism

XU Kai, LI Jiang-shan, RONG Yu-tao, CHENG Guang-jun, REN Zhong-qing, FENG Shou-xin

2002, 11(1): 30-33.

Abstract(1336) PDF(1)

Abstract:
Objective To evaluate multislice CT(MSCT) in the diagnosis of central pulmonary embolism. Methods 6 patients suspected of pulmonary embolism were examined with MSCT. Three-dimensional imaging methods were used in every case. Results The findings of intraluminal opacification in pulmonary artery, dilated main pulmonary artery and pulmonary infarction were demonstrated in all 6 cases. The presence of intraluminal lesions in pulmonary artery was showed as a partial filling defect or complete filling defect Conclusions MSCT is an effective and noninvasive method for the diagnosis of central pulmonary embolism.

CT Diagnosis and.Differentiation of The Cirrhotic Nodules

HUANG Shao-quan

2002, 11(1): 34-35.

Abstract(1492) PDF(0)

Abstract:
Objective: To evaluate cirrhotic nodules CT diagnosis and differentiation, to improve level of liver nodules. Materials: Analyze CT plan scanning and contrast enhancement images about the 120 cases cirrhotic nodules. Results: Cirrhotic nodules is the main of round and the diameter is between 5mmand 55mm,most of plan scanning is high density, thickness nodules which live is according to the type of nodules.Conclusion: Clean foundation of cirrhotic nodules and distinguish them among liver cancer, liver hemangioma and cirrhotic nodules.

The Basic Studies and Current Status in Image of Acute Radiation Induced Pulmonary Injury

LI Shao-dong

2002, 11(1): 36-39.

Abstract(1346) PDF(0)

Abstract:
The basic studies and current status in image of acute radiation induced pulmonary injury were reviewed, including pathogenesis, pathology, relevant factors, physiology and images mainly computed tomography of this disease.

Analysis of CT Imaging in Nasopharyngeal Carcinoma

PENG Ji-dong, JIANG Hai-qing, LEI Jian

2002, 11(1): 40-43.

Abstract(1564) PDF(0)

Abstract:
Objective:To recognize CT signs of nasopharyngeal carcinoma (NPC) profoundly. Methods: Nasopharynx axial CT scans were performed in 69 cases of NPC proved pathology. Their CT findings before radiotherapy were analyzed in details. Results: The seequence of CT findings in NPC was thickening of the lateral wall of nasopharynx (87.0%), narrowing of parapharyngeal space (PPS)(68.1%), thickening and compactness of the soft-tissue medial to the styloid process (59.4%). involvement of posterior naris and nasal cavity (42.0%), and bone destruction of skull base (37.7%). The rate of the other abnormal finding was low. Conclusions:Involvement of lateral wall of nasopharynx could be seen in most NPC. After breakthrough the pharyngobasilar fascia, the tumor usually invades PPS and the soft-tissue medial to the styloid process.

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2002 Vol. 11, No. 1