No abstract available.
Tomography, X-Ray Computed*

Because the mobility ratio of thin film transistors is too low, it is recognized that flat detector can not be used in CT machine.The current research direction is to find the detector material with higher mobility ratio, but with little success. This study puts forward a new scheme to solve the core problem that limits the application of CT, which is the mobility of thin film transistors:by moving various TFT functions in the thin film transistor to the peripheral circuit, the restriction of the mobility of thin film transistor on the CT machine is completely overcome, and the reading speed of the flat panel detector becomes very fast, which can perfectly meet the requirements of the scanning speed of the CT machine.This will provide new research ideas for the application of flat panel detector in CT machine.
Tomography, X-Ray Computed

PURPOSE: The aim of this study was to analyze radiologically the location and course of the mandibular canal and to observe the alveolar and basal bone changes during the remodeling procedures of atrophic mandible. MATERIALS AND METHODS: CT scanning was performed on dry 30 edentulous or partially dentulous mandibles. In 48 edentulous lower halves, measuring areas were determined by three points in the length of the mandibular canal. The distance from the mandibular canal towards cranial and caudal edges, buccal and lingual external borders of the body of the mandible were measured. A statistical comparison between the mean values of different classes of mandibular body was carried out in the selected areas. RESULTS: The distance between the mandibular canal and caudal borders of the body of the mandible and lingual borders dose not change in the atrophic process of mandible. The mandibular canal within the mandible courses downwards from mandibular foramen towards mesial and subsequently it gets to the mental foramen. The distance between the mandibular canal and buccal external border of basal bone changes similar to the change of cranial borders of alveolar bone in the atrophic process of mandible. CONCLUSION: CT scanning was very effective and practicable to analyze the location and course of the mandibular canal and to observe the alveolar and basal bone changes of atrophic mandible. Also more detailed investigation of basal bone changes observed during the remodeling procedures of atrophic mandibles seems reasonable to rely on the massive anthropologic collections of atrophic mandibles combined with CT scanning.
Mandible* ; Tomography, X-Ray Computed

No abstract available.
Tomography, X-Ray Computed* ; Ultrasonography*

It is very important that we must know the detailed calyceal anatomy for performing effective and safe endourological procedures and interpretation of excretory urograms. So, we got thorough 2-dimensional calyceal anatomy and renal rotation from 100 kidneys using 64 abdominal CT scans. We conclude that the differences of calyceal angles and posterior rotation between both kidneys are significant statistically. Also, we examined the morphologies of 232 pelviocalyceal systems and classified them.
Kidney ; Tomography, X-Ray Computed

No abstract available.
Gallstones* ; Tomography, X-Ray Computed*

No abstract available.
Thorax* ; Tomography, X-Ray Computed*

Tomography, X-Ray Computed ; trends

The cause of so-called lumbar disc syndrome are multiple and each cause must be throughly and carefully investigated. The proper treatment may not be successful if one of these factors is ignored. Forty patients with lumbar disc syndrome were examined with a third generation CT scanner(Somatom II) and SEP for 12 months. The findings of CT scan were characterized according to the criteria suggested by Carrera and Hermanus and all results were analized thoroughly. The aim of this article is to underline the importance of the correlative studies between spinal CT and SEP in relation to lumbar disc syndrome.
Humans ; Tomography, X-Ray Computed*

Statement of problem. Relatively low success rate of root analogue implant system was supposed to be due to the time duration between extraction and implant installation. The use of three-dimensional computer tomography and the reconstruction of objects using rapid prototyping methods would be helpful to shorten this time. Purpose. This aim of this study was to evaluate the application possibility of the 3-dimensional computer tomography and the rapid prototyping to root analogue implants. Material and methods. Ten single rooted teeth were prepared. Width and height of the teeth were measured by the marking points. This was followed by CT scanning, data conversion and rapid prototyping model fabrication. 2 methods were used; fused deposition modelling and stereolithography. Same width and height of this models were measured and compared to the original tooth. Results. Fused deposition modeling showed an enlarged width and reduced height. The stereolithography showed more exact data compared with the fused deposition modelling. Smaller standard deviation were recorded in the stereolithographic method. Overall width error from tooth to rapid prototyping was 7.15% in fused depostion modelling and 0.2% in stereolithography. Overall height showed the tendency of reducing dimensions. Conclusion. From the results of this study, stereolithography seems to be very predictable method of fabricating root analogue implant.
Tomography, X-Ray Computed ; Tooth