• The Journal of the Korea Contents Association
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• v.15 no.1
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• pp.316-323
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• 2015

In this study, we analyzed radiation dose and MTF with setting of Ion chamber and changing kVp so that we are able to suggest acquiring optimized diagnostic images and minimizing patient dose. we assumed right lateral decubitus position among chest decubitus projection and set 7 combination of Ion chamber. By changing kVp(100, 110, 120, 130kVp), we exposed x-ray five times respectively and calculated average value after measuring entrance dose. we input the entrance dose value to PCXMC Monte carlo simulation tool and calculated organ dose and effective dose. Then we did physical image evaluation with MTF for the purpose to compare image quality. As a result, the high kVp, entrance dose is reduced. As change of ion chamber, when selecting second ion chamber, both organ dose and effective dose were the lowest. In contrast, selecting first ion chamber was the highest. MTF is superior to set second Ion chamber and using 120 kVp. Consequently, when taking chest right lateral decubitus using Digital radiography, the optimized combination which have both reducing dose efficiently without declining image quality and aquring good qualified image is set 120 kVp and selecting second Ion chamber.

• Journal of the Korean Society of Radiology
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• v.7 no.3
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• pp.233-238
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• 2013

Chest lateral decubitus radiation exposure PA be carried out in general, but emergency patient or the patient's discomfort in the body examination had a lot of inconvenience. In this study, we compared AP and PA image quality, patient safety, and analysis of the examination effectiveness between the two tests was to evaluate the usefulness. Pleurisy or pneumothorax in patients with suspected or diagnosed chest lateral decubitus radiation exposure 30 consecutive patients (male 20 patients, 10 females) were included in the study. Image quality evaluation method microstructure of lung, wide areas of diagnosis, a clear air-fluid interface, the patient rotate, cardiac shadow and sharp diaphragmatic was based on Department of Radiology specialist, division of pulmonology resident blind test was evaluated by four people. Chest decubitus by radiation exposure the AP and PA position examination the usefulness of comparative analysis Image quality in the AP and PA, whereas there was no significant difference in attitude, Stability of the patient and Radiation's examination efficiency AP position compared to the position of PA scores were higher. PA position does not require a examination may be of AP position in a position to suggest that.

• Journal of the Korea Safety Management & Science
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• v.18 no.1
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• pp.147-152
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• 2016

Chest lateral decubitus is a chest examination to determine the persence of pleural fluid in thorax. In this study, we prepare recumbent holding position time standard of chest lateral decubitus. The records of 15 patients with chest lateral decubitus between May and Jun. Recumbent holding time is 30, 60, 90, 120, 180, 210, 240 seconds. The result is fluid level change between 0.88mm to 9.63. Fluid heigh change between 9.9 percent to 42.5 percent. We can confirm fluid level change with chest decubitus image. The proper time for fluid level change is 180 seconds.

• Tuberculosis and Respiratory Diseases
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• v.63 no.3
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• pp.261-267
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• 2007

Background: The causes of the pleural effusion are remained unclear in a the substantial number of patients with exudative effusions determined by an examination of the fluid obtained via thoracentesis. Among the various tools for diagnosing exudative pleural effusions, thoracoscopy has a high diagnostic yield for cancer and tuberculosis. Medical thoracoscopy can also be carried out under local anesthesia with mild sedation. The aim of this study was to determine diagnostic accuracy and safety of medical thoracoscopy. Methods: Twenty-five patients with exudative pleural effusions of an unknown cause underwent medical thoracoscopy between October 2005 and September 2006 in Konyang University Hospital. The clinical data such as age, gender, preoperative pulmonary function, amounts of pleural effusion on lateral decubitus radiography were collected. The vital signs were recorded, and arterial blood gas analyses were performed five times during medical thoracoscopy in order to evaluate the cardiopulmonary status and acid-base changes. Results: The mean age of the patients was 56.8 years (range 22-79). The mean depth of the effusion on lateral decubitus radiography (LDR) was 27.49 mm. The medical thoracoscopic pleural biopsy was diagnostic in 24 patients (96.0%), with a diagnosis of tuberculosis pleurisy in 9 patients (36%), malignant effusions in 8 patients (32%), and parapneumonic effusions in 7 patients (28%). Medical thoracoscopy failed to confirm the cause of the pleural effusion in one patient, who was diagnosed with tuberculosis by a pericardial biopsy. There were no significant changes in blood pressure, heart rate, acid-base and no major complications in all cases during medical thoracoscopy (p>0.05). Conclusions: Medical thoracoscopy is a safe method for patients with unknown pleural effusions with a relatively high diagnostic accuracy.