• Journal of Veterinary Clinics
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• v.17 no.1
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• pp.252-255
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• 2000

A 13.5kg, 15-year-old male mongrel dog with anemia, anorexia, vomiting and abdominal distension was referred to the Veterinary Medical Center of the Tokyo University. Radiographic and ultrasonographic findings indicated primary splenic tumor. The tumor was located at body of the spleen, which was surgically removed by splenectomy. Histopathological examination of the mass revealed sarcoma type tumor derived from the mesenchymal origin. The patient was in good health after surgery but suddenly showed abdominal distension on the 3 months after. Radiographic findings indicated abdominal neoplasms. The 2nd operation was performed and removed the recurrent mast but suddenly died on the 4th day. Histopathological examination of the tumor was myxosarcoma.

• Journal of Veterinary Clinics
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• v.21 no.2
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• pp.184-186
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• 2004

A castrated male, 6 year-old Shih-Tzu, weighing 4.6 kg with a discharge from the external ear canal and a mal-odor was referred to Verterinary Medical Teaching Hospital, Seoul National University. Radiographic findings were narrowing and focal loss of an air density in the left ear canal and bilateral thickening of the osseous bullae. For more detail examination, computed tomography was used. In computed tomographic findings, bilateral thickening of the bulla wall and increased opacity of the bulla space were observed. Thus this dog was diagnosed as bilateral otitis media. Then surgical correction, total ear canal ablation, was performed successfully and the patient showed a good prognosis thereafter. It is considered that computed tomography might serve as an useful imaging tool for otitis media and that it supplies information not obtained with a conventional radiography.

• Journal of Veterinary Clinics
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• v.21 no.2
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• pp.214-218
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• 2004

A 16-month old female Golden retriever dog was presented with a 2-week history of left-sided exophthalmos, third eyelid prominence, some scale of the trunk, mild anorexia, mild diarrhea and depression. In radiographic findings, a mass with increased opacity in the left retrobulbar area was observed. Cytologic and histopathologic examinations after enucleation and mass excision showed diffuse round cell accumulation and adjacent small area of elongated cell proliferation were shown. They also illustrated the neoplastic cells with large nucleoli, multiple nucleoli that differ in size and scant cytoplasm with several clear vacuoles. Extent of local invasiveness and central necrosis of the retrobulbar mass was identified by magnetic resonance imaging. Based on the physical and laboratory examination, radiographic, cytologic and histopathologic findings this case was diagnosed as extranodal malignant lymphoma of the retrobulbar area.

• Journal of Korean Neurosurgical Society
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• v.53 no.2
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• pp.115-117
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• 2013

Simultaneous subarachnoid hemorrhage and infarction is a quite rare presentation in a patient with a spontaneous dissecting aneurysm of the anterior cerebral artery. Identifying relevant radiographic features and serial angiographic surveillance as well as mode of clinical manifestation, either hemorrhage or infarction, could sufficiently determine appropriate treatment. Enlargement of ruptured aneurysm and progressing arterial stenosis around the aneurysm indicates impending risk of subsequent stroke. In this setting, prompt treatment with stent-assisted endovascular embolization can be a reliable alternative to direct surgery. When multiple arterial dissections are coexistent, management strategy often became complicated. However, satisfactory clinical results can be obtained by acknowledging responsible arterial site with careful radiographic inspection and antiplatelet medication.

• Journal of information and communication convergence engineering
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• v.6 no.4
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• pp.425-429
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• 2008

We investigated algorithm to detect and characterize interstitial lung abnormalities seen at chest radiographs. This method includes a process of 4 directional Laplaction-Gaussian filtering, and a process of linear opacity judgment. Two regions of interest (ROIs) were selected in each right lung of patients, and these ROIs were processed by our computer-analyzing system. For quantitative analysis of interstitial opacities, the radiographic index, which is the percentage of opacity areas in a ROI, was obtained and evaluated in the images. From or result, abnormal lungs were well differentiated from normal lungs. In our algorithm, the processing results were not only given as the numeric data named "radiographic index" but also confirmed with radiologists observation on CRT. The approach, by which the interstitial abnormalities themselves are extracted, is good enough because the results can be confirmed by the observations of radiologists. In conclusion, our system is useful for the detection and characterization of interstitial lung abnormalities.

• Journal of Biomedical Engineering Research
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• v.10 no.3
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• pp.293-302
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• 1989

A Dual Sensor Wiener Filter technique was used to improve the image quality of the scanning type digital radiographic system (resolution and SNR). In this method, two images were acquried simultaneously using two sensors with high and low resolution and SNR values. Using the cross Power spectrum between dual sensor outputs of the same chest radiographic image. we design a new type of Wiener Filter and implement it with fast algorithm. We compared the performance of this new dual sensor filter with conventional single sensor filters (Wiener Filter and Parametric Projec- tion Filter) . In simulation studies, it is shown that this new method has SNR improvement of 1-3 dB better than conventional filters.

• Journal of Veterinary Clinics
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• v.20 no.2
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• pp.255-258
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• 2003

A 2.5 kg, three-month-old. intact male Shih-tzu was referred to the Veterinary Teaching Hospital of Kyungpook National University to examine the postoperative inflammation and suspected diaphragmatic defect which had been found during the surgical correction of umbilical hernia by the referral veterinarian. An umbilical hernia had been surgically repaired one month earlier at the time. Radiographic findings were enlarged cardiac silhouette containing soft tissue and gas densities and overlapping of cardiac and diaphragmatic borders. Ultrasonographic findings revealed the discontinuity of the diaphragm and the partial herniation of the liver into the pericardial sac. According to these findings, it was diagnosed as congenital peritoneopericardial diaphragmatic hernia(PPDH). Because the dog showed no serious clinical signs of PPDH and the owner didn't want a surgery to correct it, the dog was discharged the day of the examination after treatment of the inflammatory surgical site. On the follow-up after three months, the dog showed no distinct clinical signs of PPDH and was in good physical condition.

• Journal of Veterinary Clinics
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• v.20 no.2
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• pp.248-251
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• 2003

Esophageal obstruction as a result of persistence of the right aortic arch was diagnosed in a 3-month-old male Persian cat. Regurgitation right after weaning and retardation were noted in this cat. Survey radiographic signs on the lateral view include ventral deviation of the thoracic trachea caused by draping of the dilated esophagus over the dorsum of the trachea and a distinct interface of the dorsal wall of the esophagus silhouetting with the cranial thoracic hypaxial muscles. On the ventrodorsal view, the cranial mediastinum was widened with soft tissue density. The trachea was deviated to the right. In an esophagram, the segmental dilation of the esophagus with constriction of the lumen just cranial to the heart base was apparent. Thoracotomy was performed and corrective surgery was carried out. At surgery, it was confirmed that the esophagus was constricted at the cranial to the base of the heart.

• Journal of Veterinary Clinics
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• v.16 no.2
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• pp.478-481
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• 1999

A 8 years old male Pomeranian weighing 4 kg was referred because of coughing of 4 months' duration. Heart sounds and cardiac apex beat were showed more intense on the right side. On radiographic views, loss of normal line of the diaphragm, gas-containing intestines and stomach in thoracic cavity, and right displacement of heart were observed. Ultrasonography revealed that liver located adjacent to the heart. Although the dog died due to severe respiratory disorder in surgical procedure, in thoracic and abdominal surgery, a large defect was found in the left and right ventral muscular portion and left central tendon of the diaphragm, extending from the esophageal hiatus to rib. Left and right cranial lobe of liver, small intestines, stomach and spleen were herniated in the thoracic cavity. Because of the size and chronicity of the defect in the diaphragm, closure was impossible with an abdominal muscle graft.

• Journal of Welding and Joining
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• v.20 no.2
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• pp.65-70
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• 2002

This study was to evaluate GMA welding characteristics of the A15083-O aluminum alloy according to the shield gas mixing ratio and heat input change. The GMA welding of the base metal was carried out with flour different shield gas mixing ratios(Ar100%+He0%, Ar67%+He33%, Ar50%+He50%, and Ar33%+He67%). Regarding the if1uence on the bead shape of the shield gas mixing ratio and heat input, the bead width was greatest in Ar100%+He0% mixture. But the penetration depth and area were greatest in Ar33%+He67% mixture considering that the lower Ax gas ratio, the higher bead depth and area. Also, dilution was also best in the shield gas mixing ratio. The size and number of deflects were least in Ar33%+He67% mixture. Higher He gas ratio resulted in less deflects detected by the radiographic inspection.