• International Journal of Fuzzy Logic and Intelligent Systems
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• v.2 no.1
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• pp.15-19
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• 2002

Automatic detection of interstitial lung disease using Neural Network is presented. The rounded opacities in the pneumoconiosis X-ray photo are picked up quickly by a back propagation (BP) neural network with several typical training patterns. The training patterns from 0.6 mm ${\O}$ to 4.0 mm ${\O}$ are made by simple circles. The total evaluation is done from the size and figure categorization. Mary simulation examples show that the proposed method gives much reliable result than traditional ones.

• Journal of Chest Surgery
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• v.33 no.6
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• pp.521-524
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• 2000

The benign teratoma is usually slow growing tumor, but we expirienced a case of primary huge mediastinal benign teratoma that had grown very rapidly, maximally during 3 years. The 14-year-old female patient was admitted to our hospital because of abnormal chest X-ray that showed 10$\times$10cm sized well definded mass with multiple calcificactions. but the mass was not present in chest X-ray perfomed on 3 years prior to admission. Under the diagnosis of teratoma, complete surgical resection was done by the left thoracotomy. The result of pathology was benign teratoma.

• Journal of The Korean Radiological Technologist Association
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• v.27 no.2
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• pp.229-251
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• 2001

At the investigations with 200 institutes for analysis of factor associated with radiographic conditions reduction of patient exposure dose during X-ray diagnosis, 170 institutes or $85\%$ answered. For estimation of exposure dose the entrance

• Journal of Korea Multimedia Society
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• v.12 no.9
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• pp.1233-1241
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• 2009

Over the 50 percents of women who are older than 45 years have osteoporosis. Because people hardly recognize this disease by themselves, the researches that measure bone mineral density have been doing widely to detect osteoporosis in the early stage. The most widely used methods for bone mineral density measurement are based on the X-ray imaging. Among them, DEXA(Dual-energy X-ray Absorptiometry) imaging is one of the important methods in bone mineral density measurement. DEXA images are useful methods to increase diagnosis efficiency by reducing anatomic noise as two images obtained from two different energy levels. However, it has some problems to a calibration parameter determined by the heuristic method for bone extraction. In this paper, we propose the method to extract bone in DEXA image using calibration parameter based on anatomic attenuation coefficient. The experimental results reveal that the proposed method is effective.

• Journal of the Korean Society of Radiology
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• v.9 no.3
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• pp.131-137
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• 2015

The purpose of this study is to warm up the conventional X-ray table by inventing and design for X-ray table with an attached heating device using less unloaded X-ray, CNT (carbon nano tube) heating element. Configuration of the product design for adhesive carbon heating element X-ray is composed of a conventional X-ray table, carbon nano tube planar heating element, an electrode line, flame resisting protective film, and the bottom film. Characteristics and advantages of this invented product is to provide gentle feeling, the sense of security, and eliminating anxiety to the patient wearing a patient gown and feel the cool air while receiving the test. Thus we are strongly recommend to use this device in the clinical situation.

• Journal of Chest Surgery
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• v.28 no.2
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• pp.196-200
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• 1995

Congenital Cystic Adenomatoid Malformation [C.C.A.M. is rare, cause acute respiratory distress in the newborn infants. The histologic features are cystic areas and marked proliferation of terminal respiratory structures. On case 1, the patient was 8-month-old male, and suffered from acute respiratory distress and cyanosis. The pulmonary cystic lesion was detected in right lung at birth and has been evaluated since birth. The study for diagnosis were chest x-ray and chest CT. A right upper lobectomy was urgently performed and he was discharged with a satisfactory postoperative course. On case 2, the patient was 20-year-old female, and suffered from cough and sputum for 2 months. The study for diagnosis were chest x-ray, chest CT, and pulmonary angiography. The cystic lesion was detected in left lung and difficult to distinguish from pulmonary sequestration. A left lower lobectomy was performed and she was discharged with a satisfactory postoperative course. We report two cases of C.C.A.M. with differential clinical course.

• Proceedings of the KOSOMBE Conference
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• v.1997 no.11
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• pp.319-322
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• 1997

This paper presents a CAD (Computer-Aided Diagnosis) system or detection of breast cancer, which is composed of personal computer, X-ray film scanner, high resolution display and application softwares. There are three major algorithms implemented in the application software. The irst algorithm is the adaptive enhancement of the digitized X-ray mammograms based on the first derivative and the local statistics. The second one is to detect the clustered microcalcifications by using the statistical texture analysis, and the third one is the classification of the clustered microcalcifications as malignant or benign by using the shape analysis. These algorithms were verified by real experiments.

• Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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• 2009.11a
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• pp.248-248
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• 2009

Diagnostic X-ray system has been contributed to wiping out disease to get a good quality images from patients. But, X-ray radiation could be exposed to patient and it is very harmful to the patient. In order to reduce being bombed, the many research and development is now advanced. This research has produced the high voltage occurrence system of full-wave rectification method by using the LC resonance inverter, and evaluated the irradiation reproducibility in order to use it in diagnosis of the patient.

• Journal of Integrative Natural Science
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• v.8 no.2
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• pp.141-144
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• 2015

As the visual quality of X-ray images is a critical reference for the accuracy of the clinical diagnosis, the methods to improve the quality of X-ray images have been investigated. Among many existing methods, using frequency domain filter is a very powerful method to improve the visual quality of images. In this paper, the inherent noises of the input images are suppressed by adding the Laplacian image to the subjected image. The medical X-ray images using the optimal high pass filter has shown improved edges. Further, the optimal high frequency emphasis filter has shown the improved contrast of flat areas by using the result image from the optimal high pass filter. Also the resulting images of the global contrast have improved by the histogram equalization. As a result, the proposed methods have shown enhanced contrast and edges of the images with noise canceling effect.

• Proceedings of the KIEE Conference
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• 2000.07d
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• pp.3207-3209
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• 2000

X-ray CT(Computed Tomography) has been a good modality for non-invasive diagnosis and recently, Conventional CT has been replaced rapidly with Spiral CT in recent. In X-ray CT, spiral scanning has various advantages such as better image quality, reduced scan time (in a single breath-hold), a lower x-ray dose. But, it requires very fast and high performance image processing system to reconstruct slice images from spiral scanning. This paper describes the fast image reconstruction techniques with filtered back projection from the viewpoints of fast algorithm as well as hardware implementation for real-time imaging.