CT理论与应用研究

Research on Detection of Earthwork and Stonework in Complex Site with Comprehensive Exploration Means

Yang Xiangdong

2001, 10(3): 1-5.

Abstract(566) PDF(2)

Abstract:
In this paper comprehensive application of geological radar and drilling in complex site is introduced to solve the problem of correct calculation of earthwork and stonework on example of earthwork and stonework detection results in some site in city Shenzhen, And it is worth extending.

The Mathematical Definition Of Original Digital Image And the Abstraction of Stripe Noise

Yang Xuhai, Zhang Xiaochun

2001, 10(3): 42-46.

Abstract(559) PDF(2)

Abstract:
This paper tries to give the mathematical definition of original digital image which makes it easier to carry out the reconstruction and process of the image, it also analyzes the reason why there remains the stripe noise, and shows the ways of how to take it off .As a result, it solves the problem of Abstracting rocks fractures using CBIL data.

Basic Theorems and Their Numeric Computation in Image Reconstruction

Wang Weidong, Bao Shanglian

2001, 10(3): 6-9.

Abstract(651) PDF(4)

Abstract:
This paper Mathematically present six basic theorems and their numerical computation methods in the field of image reconstruction. With the development of large-scale integral circuits Systolic array the present methods for reconstructing directly images may be implemented real-time. The results of computer simulation are presented for illustrating the efficiency of the proposed methods.

CT Diagnosis of Brain Glioma

Wu Hua

2001, 10(3): 10-13.

Abstract(585) PDF(3)

Abstract:
objective: To study the CT features of the common gliomas and improve the diagnostic accuracy. Method: This article analyzed retrospectively CT features of 34 patients with the brain glioma. Result: Thirty four patients included 24 cases with astrocytoma, 5 cases with oligodendrogllioma, 2 cases with ependymoma, 3 cases with medulloblastorma. Adult's morbidity was higher than child's, more lesions were observed in supratentory than in subtentory. Different type gliomas have peculiar location and typical CT features. Conclusion: The correct diagnosis of brain glioma could be established by comprehensive consideration of the CT appearance, the patient's age and the location of tumor.

Clinical use of Spiral CT Angiogram(SCTA) and 3D Reconstruction in Cerebrovascular Diseases

Huang Fuqi

2001, 10(3): 14-17.

Abstract(610) PDF(2)

Abstract:
This paper intend as to inquire into spiral CT angiogram (SCTA) and the new technology of 3D reconstruction. in the use of cerebrovascular diseases. We examined 26 cases of cerebrovascular. Diseases by CTA and 3D reconstruction. 3D reconstruction uses Maximum Intensity Projection (MIP) or surface Rendering. There was 13 cases of intracranial aneurysm, 6 cases of cerebrovascular Malformation, 5 cases of spontaneous intracranial hemorrhage and 2 cases of cerebral ischemia, This group contained 23 cases by DSA and was contrasted with the ones by CTA. The result of 22 cases by CTA was the same as the ones by DSA except that 3 cases weren't used DSA and 1 cases of multiple aneurysm wasn't found 2 little aneurysm by CTA. CTA is superior to DSA in describing the bone structure and the cerebrovascular 3D structure. SCTA is a simple, quick, valuable cerebrovascular photography with no wound. It can replace DSA or wounded angiogram of the head.

The Study of CT-Guided Percutaneous Thoracic Puncture Biopsy

Wang Jie, Luo Xiaoyan, Huang Shuqin, Ma Zhilong, Li Shuhua

2001, 10(3): 18-21.

Abstract(641) PDF(2)

Abstract:
purpose: To sum up the experiences of CT-guided percutaneous thoracic puncture biopsy. Materials and Methods: 83 cases mere performed. 70 cases were pulmonary diseases, 10 cases were mediastinal diseases, 3 cases were thoracic wall and pleural diseases. With pulmonary biopsy needle. A total of 93 cuttings were done. Results: The ratio of puncture succession was l00%. The results of cytology and histology: ideal was 80.7%, reliability was l3.3%, the total reliable ratio was 94%, unreliability was 6%. Conclusion: It could be increased the ratio of puncture succession and the reliability of tissue sample that accurate location. skilled operation and the cooperation with the patients.

CT Guided Puncture Aspiration Treatment for Hepatic Abscess

Li Xiaowen

2001, 10(3): 22-24.

Abstract(550) PDF(2)

Abstract:
This report of hepatic abscess 8-patients cases had been hospitalized by CT guided puncture aspiration. Besides clinical treatment, puncture and drainage were done with 5F tube by the guidance of radiological means including B-us and CT diagnoses. The pus cavity diminished and the patients recovered soon. The whole treatment time was shortened a lot. This method was simple and practicable and getting worth popularizing.

Analysis of CT Features of Tired Tibia Fracture

Ren Zhongqing, Xu Kai, Cheng Guangjun

2001, 10(3): 25-27.

Abstract(547) PDF(2)

Abstract:
The X-ray and computed tomography (CT) features of l3 cases with tired tibia fractures were analyzed retrospectively. Significance of differential diagnosis using CT for diagnosis of tired fracture was evaluated. The higher density of bone marrow cavity and thickness of local soft tissue were demonstrated as an early main diagnostic evidences.

CT Guided Percutaneous Ethanol Injection Therapy in Lung Carcinoma(80 cases report)

Gao Yan, Zheng Jiasheng, Cui Xiongwei

2001, 10(3): 28-32.

Abstract(614) PDF(3)

Abstract:
Purpose: To analyse and evaluate the therapeutic effect of the double interventional therapy of bronchial artery chemotherapy and CT guided percutaneous absolute alcohol injection (PEI) in primary lung carcinoma. Meterials and Methods: 20 cases with primary lung carcinoma were treated by single bronchial artery chemotherapy, the total times were 68; 20 cases were treated by single chemoembolism, the total times were 22; 40 cases were all treated by double interventional therapy in the same time of chemotherapy, 20 cases were treated by bronchial artery embolism, the total operations were 28 times, and the local chemotherapy was 40 times. Single chemotherapy were 20 cases, it was total 64 times. During the period of treatment, CT guided percutaneous absolute alcohol injection therapy was done on the 40 patients, it was total 118 times. ResultS: The clinic effective rates of bronchial artery chemoembolism and single chemotherapy were 70% and 30%. The clinic effective rate of double intervention therapy is 90% and 80% individually. No adverse reaction and severe complications occurred. Conclusion: Double interventional therapy has much higher clinic effective rates and survival rate than single bronchial artery chemotherapy or chemo embolism. It has notable difference (P＜0.01).

Disk-flavum Ligamentum Space: CT Measurement and It's Clinical Value

Yang Tao, Xu Anrong, Ge Fengming, Wei Guangming, Tong Jihua

2001, 10(3): 33-35.

Abstract(639) PDF(2)

Abstract:
Objective TO measure the width of disk-fiavum ligamentum spase(DFLS) and evaluate it's value in diagnose of herniation of intervertibral disk. Materials and Methods The image of CT in lumbar intervertibral disk of 200 cases were retrospectively analyzed; and the shapes of L3-S1 disk, the width of flavum ligmenta at each side and that of DFLS were recorded.. The relation of the restructions and parameters to DFLS stenosis and the compressed lumbar nerve roots shown in CT were analyzed. Results The herniation or bluging of intervertibral disk were found in l96 level; 78 flava ligments width ＞5mm; 172 of 200 cases of mean width DFLS (3.60.8)mm. Conclusion The DFLS£5mm can be diagnosed stenosis. The main causes of stenosis are herniation or bluging of intervertibral disk, flava ligamen thicker. It can be used as a valuable criterion diagnosing lumbar nerve boot compression in CT study.

The Clinical Value of MRI in Diagnosis of Acute Injury of Cervical Vertebral

Ren Zhongqing, Xu Kai, Cheng Guangjun, Feng Shouxin

2001, 10(3): 36-38.

Abstract(564) PDF(2)

Abstract:
Objective: To evaluate diagnostic value of MRI for acute injury of cervical vertebral. Methods: 53 cases of acute injuries of cervical vertebral confirmed by MRI examinations were analyzed retrospectively. The compared study was made to evaluate image characteristics between MRI and CT or conventional xerography. Results: Of all of 53 cases, 41 had cervical vertebral fractures, 3 had dislocations of cervical vertebral, 30 had damages of cervical vertebral fracture, ligament tearing and dislocation of intervertebral dicks can be made by MRI clinically. In comparison with CT and conventional Xerography, MRI could be an optimal diagnostic method to be considered for diagnosis of acute injury of cervical vertebral.

Detecting A Soft Trouble of Philips MRI RF Amplifier

Liu Hong, Liu Ying

2001, 10(3): 39-41.

Abstract(533) PDF(2)

Abstract:
A soft trouble of Philips MRI RF amplifier occurred with message -'Bias current out of range' on operating console screen, and the scan stopped. After checking the RF amplifier by 'Test Software', and adjusting maximum RF power, the malfunction unit-RF power amplifier board was found, and it was proved by replaced the board.

On Spectral Seismograms-3D Display of Seismogram

Stefan Fasitehuofu, Guo Lücan

2001, 10(3): 47-51.

Abstract(661) PDF(3)

Abstract:
This paper describe the spectral seismogram(seismic topography) had developed the concept of spectral magnitude which was introduced by S.J. Duda, the calibration functions for broad-band digital recordings of P-waves. The method of spectral seismograms, which was developed by Stefan Fasthoff and Duda to analyse Strong shock in and near China in recent years. This method had been used to classify seismic sequence types by its color feature: red-quake with lower frequency in P or S-wave group, and blue-quake which contained with more larger frequency elements in P or S-wave group by the filter of digital seismic records.

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2001 Vol. 10, No. 3