• Journal of radiological science and technology
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• v.30 no.4
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• pp.349-356
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• 2007

Conclusions below are drawn after survey date from 1,969 samplers of mammography and 1,531 breast ultrasound for 10 months, from 1 July 2006 to 30 April 2007. 1. Ages between 40 and 50 of samplers take the largest part of age distribution, and 68.57% of mammography and 71.32% of samplers are fallen under the category. 2. Samplers judged by diseased patients are 31.95% samplers of mammography and 45.79% samplers of breast ultrasound. 3. Age distributions of diseased patients were from 30 to 60 in mammography, 30 to 50 in breast ultrasound. 4. Breast ultrasound shows little difference between left side and right side of diseased part, but mammography shows significant diseased part in both sides. 5. As a result of reading examination, there is higher probability of detection in order of Calcification, Nodular, Mass in mammography. And Cyst, Nodular, Mass in breast ultrasound. 6. As a reading examinations, probability of judging a certain disease in high in mammography, but breast ultrasound shows 1 or 2 kinds of disease.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2014.05a
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• pp.826-828
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• 2014

Recently trend of product is miniaturization. As a result, We need products surface as well as products internal defect inspection. Generally, Inspection products in production process uses a lot of optical inspection. However, This is difficult to internal inspection of products. We used optical device instead of X-ray generator. At the same time, We have developed system to determine the product defect. First, obtain X-ray image from Machine vision function. Next, Measured value is recognize suitability within error range. otherwise recognize defect. Results presence of defective products can be stored by user.

• Journal of the Korean Society of Radiology
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• v.16 no.5
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• pp.505-512
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• 2022

In this study, a 3D printed assistive device was applied to X-ray examinations to diagnose human diseases. Based on the results of evaluating the device, statistical and regression analyses were conducted to evaluate its clinical utility and purchase intention, respectively. In the experiment, 90 radiologists performed X-ray examinations on patients who agreed with the use of the assistive device in oblique view X-rays of the lumbar spine, and then statistical analyses were undertaken with a traditional aid and factor analysis. The non-standardized coefficient values of the multiple regression analysis performed by setting the purchase intention of the 3D printed device as the dependent variable and the 3D printed device and traditional aid calculated by factor analysis as independent variables were 0.893 (p<0.001) and 0.269 (p<0.001), indicating statistically significant results. The results show that the 3D printed assistive device proposed in this study has higher clinical utility than traditional aids used in oblique view X-rays of the lumbar spine.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.19 no.7
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• pp.1737-1742
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• 2015

In the industrial field for product inspection needs not only on the surface of the product but also the internal components defect inspection. Generally, optical inspection is mainly used for item inspection from production process. However, this is only to check defect of surface it is difficult to perform inspection of goods internal. To overcome these limitations, Instead of optical device by using the portable X- ray DR image acquisition device system developed to obtain an image in real time at the same time and determine product defects. After obtaining the X- ray image, the inspection product within error range is passed after machine image processing. Also, the results and numbers are stored by users.

• Journal of radiological science and technology
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• v.45 no.3
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• pp.249-254
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• 2022

The purpose of this study was to examine the importance of proper positioning in chest PA X-ray examination. As a study method, this author searched for and analyzed materials related to chest PA X-ray examination from theses and books that had been published previously to understand the importance of proper positioning in chest PA X-ray examination. Generally, one of the examinations frequently done in most of the hospitals is chest PA X-ray examination. Also, in any kinds of X-ray examination, proper positioning is the most fundamental and definite way to provide accurate information about the patient. Poor positioning in chest PA X-ray examination may jeopardize the diagnosis and treatment, increase social cost due to examination needed to be done additionally, and generate additional radiation exposure unnecessarily above all. In conclusion, it is expected that proper positioning in chest PA X-ray examination will exert positive effects such as the provision of accurate information about the patient, prevention of misdiagnosis, reduction in social cost, and lastly decrease in radiation exposure.

• Proceedings of the KOR-BRONCHOESO Conference
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• 1983.05a
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• pp.13.2-13
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• 1983

Foreign bodies in air and food passages are not uncommon conditions in otolaryngological field and we can find out numerous causes of esophageal foreign bodies in literatures. Radiological exammination is essential and important method in diagnosis of foreign bodies in esophagus. The authors experienced a case of foreign body double coins, in esophagus in a 4-year - old girl and the authors emphasizing that in cases of esophageal foreign bodies radiological examination should always be included lateral view as well as anteroposterior view of neck especially when coins in the esophagus is suspected.

• Proceedings of the KAIS Fall Conference
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• 2006.11a
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• pp.147-149
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• 2006

본 연구는 산업용과 의료용에 사용되는 비파괴 검사용 X 선 영상시스템에 이용되는 X 선을 직접 감지하는 방식의 센서를 실리콘 반도체 재료를 사용하여 개발하는데 목적이 있다. 현재 사용되고 있는 비파괴 시험 용 검사 방법은 X-선을 사용하고 감지 필름 또는 고가의 감지재료를 사용하고 있으나 본 과제에서는 경제성이 있으며 기술기반이 확고한 실리콘 재료를 사용하고 디지털 촬영 방식을 도입하여 컴퓨터로 시험결과를 영상 처리한다는 장점이 있으며 영상 자료의 컴퓨터 베이스 처리와 영상 저장이 편리하게 이루어졌다.

• Journal of the Korean Society of Radiology
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• v.5 no.6
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• pp.343-349
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• 2011

This study was aimed to evaluate the absorbed dose in brain of dental radiography. For radiographic exposure, PLD(photoluminescence dosimetry) chips placed in Rando phantom to measurement the absorbed dose to pituitary gland, orbit, maxillary sinus and submandibular glands, thyroid gland, esophagus. Equipments were used Kodak 2200, Kodak 8000C dental radiographic systems and computed tomography(Lightspeed VCT). The absorbed doses were measured at the same exposure parameters and distance by the clinical factor(kV, mA, sec). The result were as follows ; The absorbed dose for intra-oral radiography were 0.02~2.47cGy, the greatest absorbed dose was 2.47cGy for thyroid gland in maxillary right molar projection. the lowest adsorbed dose was 0.02cGy for submandibular glands in lower anterior projection. The absorbed dose for extra-oral radiography were 0.36~3.44cGy of cephalometric method, 0.14~12.82cGy of panoramic method, 8.17~253.63cGy of computed tomography, the greatest adsorbed dose was 253.63cGy for submandibular glands in maxillary CT scan. the lowest adsorbed dose was 0.14cGy for orbit in panoramic method. As a result, extra-oral radiography was measured more than intra-oral radiography. In particular, method which used computed tomography was measured more than 100 times than intra-oral radiography highly. Therefore, you must show a guideline in extra-oral radiography and an effort to reduce absorbed dose is demanded.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.4 no.2
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• pp.371-378
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• 2000

In this study, we proposed pathological pattern detection system for X-ray chest image using artificial neural network. In a physical examination, radiologists have checked on the chest image projected the view box by a magnifying glass and found out what the disease is. Here, the detection of X-ray fluoroscopy is tedious and time-consuming for human doing. Lowering of efficiency for chest diagnosis is caused by lots mistakes of radiologist because of detecting the micro pathology from the film of small size. So, we proposed the method for disease detection using artificial neural network and digital image processing on a X-ray chest image. This method composes the function of image sampling, median filter, image equalizer used neural network and pattern recognition used neural network. We confirm this method has improved the problem of a conventional method.

• Journal of the Korean Society of Radiology
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• v.18 no.2
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• pp.127-133
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• 2024

The elbow joint is made up of three different bones. X-rays or other radiological exams are commonly used to diagnose elbow injuries or disorders caused by physical activity and external forces. Previous research on the elbow joint reported a new examination method that meets the imaging evaluation criteria in the tilt position by Z-axis elevation of the forearm. Therefore, this study aims to design an optimized instrument and develop an aid applicable to other upper extremity exams. After completing the 2D drawing and 3D modeling design, the final design divided into four parts was fabricated with a 3D printer using ABS plastic and assembled. The developed examination aid consists of a four-stage Z-axis elevation tilt angle function (0°, 5°, 10°, and 15°) and can rotate and fixate 360° in 1-degree increments. It was designed to withstand a maximum equivalent stress of 56.107 Pa and a displacement of 1.6548e-5 mm through structural analysis to address loading issues caused by cumulative frequency of use and physical utilization. In addition to X-ray exams of the elbow joint, the developed aid can be used for shoulder function tests by rotating the humerus and also be applied to MRI and CT exams as it is made of non-metallic materials. It will contribute to the accuracy and efficiency of medical imaging diagnosis through clinical applications of various devices and medical imaging exams in the future.