• Journal of Trauma and Injury
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• v.22 no.2
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• pp.206-211
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• 2009

Purpose: Abdominal CT (computed tomography) is a principal diagnostic imaging modality for torso trauma at the Emergency Department (ED). When acute osseous pelvic injuries are detected by abdominal CT, additional three-dimensional (3D) reconstruction pelvic CT is often performed. We compared abdominal CT with pelvic CT to provide information about acute osseous pelvic injuries. Methods: A retrospective investigation of patients'electronic medical records during the five year period between January 1, 2004 and December 31, 2008 among Korean soldiers who underwent pelvic CT after abdominal CT at the ED was conducted. Axial images of abdominal CT were compared with axial images and 3D reconstruction images of pelvic CT. Results: Sixteen patients underwent subsequent pelvic CT after abdominal CT. Axial images of abdominal CT showed the same results in terms of fracture detection and classification when compared to axial images and 3D reconstruction images of pelvic CT. Pelvic CT (including 3D reconstruction images) followed by abdominal CT neither detected additional fracture nor changed the fracture type. Conclusion: This study has failed to show any superiority of pelvic CT (including 3D reconstruction images) over abdominal CT in detecting acute osseous pelvic injury. When 3D information is deemed be mandatory, 3D reconstructions of abdominal CT can be requested rather than obtaining an additional pelvic CT for 3D reconstruction.

• Journal of Digital Convergence
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• v.13 no.9
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• pp.431-437
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• 2015

This convergence study analyzed the effectiveness of contrast agent reduction by normal saline solution dilution in the computed tomography of arteries of lower limb. 48 patients of 125 cc contrast agent and 30 patients of the same amount divided at a ratio of 7:3 for the contrast agent and normal saline solution were studied. The average attenuation coefficient(HU) and signal to noise ratio(SNR) of abdominal aorta, femoral artery, popliteal artery and posterior tibial artery at each image were evaluated quantitatively and the four criteria in the five point scale was conducted qualitatively by two radiologists and four radiological technologists. In the quantitative evaluation, both HU and SNR had high average score before dilation but there were no statistical significance by independent t-test(p>0.05). In the qualitative evaluation, there were a little differences in the average scores between 4.86~4.77 of original contrast agent and 4.83~4.67 of dilated contrast agent but there were no statistical significance(p>0.05). In the computed tomography of arteries of lower limb, the dilated contrast agent doesn't influence image quality and reduces overall contrast agent and lowers iodine content per unit of molecular therefore will contribute to decrease side effect of contrast agent.

• 대한방사선치료학회:학술대회논문집
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• 2005.06a
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• pp.13-17
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• 2005

Introduction : For stereotactic radiosurgery (SRS) of a tumor in the region whose movement due to respiration is significant, like Lung lower lobe, the gated therapy, which delivers radiation dose to the selected respiratory phases when tumor motion is small, was peformed using the Respiratory gating system and its clinical effectiveness was evaluated. Methode and Materials : For two SRS patients with a tumor in Lung lower lobe, a marker block (infrared reflector) was attached on the abdomen. While patient' respiratory cycle was monitored with Real-time Position Management (RPM, Varian, USA), 4D CT was performed (10 phases per a cycle). Phases in which tumor motion did not change rapidly were decided as treatment phases. The treatment volume was contoured on the CT images for selected treatment phases using maximum intensity projection (MIP) method. In order to verify setup reproducibility and positional variation, 4D CT was repeated. Result : Gross tumor volume (GTV) showed maximum movement in superior-inferior direction. For patient $\#$1, motion of GTV was reduced to 2.6 mm in treatment phases ($30\%\~60\%$), while that was 9.4 mm in full phases ($0\%\~90\%$) and for patient $\#$2, it was reduced to 2.3 mm in treatment phases ($30\%\~70\%$), while it was 11.7 mm in full phases ($0\%\~90\%$). When comparing two sets of CT images, setup errors in all the directions were within 3 mm. Conclusion : Since tumor motion was reduced less than 5 mm, the Respiratory gating system for SRS of Lung lower lobe is useful.

• Journal of the Institute of Electronics Engineers of Korea CI
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• v.48 no.2
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• pp.9-15
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• 2011

In this paper, we propose a method to extract the external oblique muscle of abdomen images that is often excluded by previous method due to image distortion. In the preprocessing phase of the proposed method, we emphasize the brightness contrast with Ends-in search stretching algorithm after removing noise from the initial ultrasonic images. Then we apply average binarization in vertical direction to extract candidate fascia areas. After removing other areas than fascia with morphological characteristics, the lost part in the fascia during the process is restored with such characteristic information and location information. Then the skin area is also removed with information from the arc appearing in convex filming and the candidate muscle areas are extracted by overlapping two results two way up-down search algorithm. Another noise removing process is done to determine the muscle area. In case of obtaining obscure result, after restoring the muscle area by smearing method, the thickness of the muscle is measured by min square method. The experiment verifies that the proposed method is sufficiently effective to analyze the size and shape of muscles in abdomen in ultrasonography than previously used methods.

• Journal of Chest Surgery
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• v.42 no.1
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• pp.115-118
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• 2009

A 65 year-old man, who underwent transthoracic esophagectomy for mid-thoracic esophageal squamous cell carcinoma, suffered from an incarcerated herniation of the transverse colon through a defect in the left mediastinal pleura. The patient had a gas collection in the left lower lung field and this then insidiously progressed; the final result was total collapse of the left lung and hemodynamic compromise. The life-threatening herniation of the transverse colon into the pleural cavity after pervious esophagectomy was corrected by emergency laparotomy. Postoperative pulmonary complications after esophagectomy can induce potentially lethal transhiatal herniation because of the danger of intestinal obstruction or strangulation. The optimal approach to transhiatal herniation after esophagectomy is prevention.

• Tuberculosis and Respiratory Diseases
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• v.42 no.2
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• pp.226-230
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• 1995

Effusions arising from acute pancreatitis are usually small, left sided and self limiting. The incidence of pleural effusions in acute pancreatitis is reported between 3% and 17%. In chronic pancreatitis, as a consequence of fistula and pancreatitic pseudocyst formation or by spontaneous rupture of a pancreatic psudocyst directly into thoracic cavity, extremely large effusions may be seen. When the underlying pacreatic disease is asymptomatic, the diagnosis is made by measuring the amylase content of the pleural fluid. We experience a case of left sided pleural effusions caused by pancreatico-pleural fistula associated with pancreatic pseudocyst. The diagnosis was made by measuring of pleural fluid amylase level(80000U/L). Abdominal CT scan revealed pancreatic pseudocyct and pancreatitis with extension to left pleural space through esophageal hiatus and extension to left subdiaphragmatic space. Left pleural effusions were decreased after fasting, total parenteral nutrition and percutaneous pleural fluid catheter drainage. We reported a case of pleural effusions and pacreatico-pleural fistula asssociated with asymptomatic pancreatic disease with review of literatures.

• Journal of the Korean Society of Radiology
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• v.1 no.2
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• pp.23-30
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• 2007

This paper presents a method of generating 3-dimensional images by preprocessing 2-dimensional abdominal images obtained using CT (computed tomography) and MRI (magnetic resonance imaging) through segmentation, threshold technique, etc. and apply the method to virtual endoscopy. Three-dimensional images were visualized using indirect volume rendering, which can render at high speed using a general-purpose graphic accelerator used in personal computers. The algorithm used in the rendering is Marching Cubes, which has only a small volume of calculation. In addition, we suggested a method of producing 3-dimensional images in VRML (virtual reality modeling language) running on the Web browser without a workstation or an exclusive program. The number of nodes, the number of triangles and the size of a 3-dimensional image file from CT were 85,367, 174,150 and 10,124, respectively, and those from MRI were 34,029, 67,824 and 3,804, respectively.

• Journal of Physiology & Pathology in Korean Medicine
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• v.20 no.2
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• pp.488-493
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• 2006

To make a objective diagnosis of Dam Hun(痰暈), we investigated the 63 patients with Dam Hun(痰暈) and 34 normal people as control group. we compared the thermal difference between Chon-jung(CV17 ) and Chung-wan(CV12 中脘), Chon-jung(CV17 ) and Gwan-won(CV4 關元) and we compared the thermal difference of Yang-mun(ST21 梁門), Chun_chu(ST25 天樞), Su-do(ST28 水道), too. All 63 patients had dizziness and GI trouble. They had the symptom - fatigue, nausea vomitting, head heaviness, indigestion, cold limbs, headache, heart burn, constipation, diarrhea, anorexia. And some had edema, numbness, insomnia, palpitation, facial flushing, dysuria, ringing. Considering the average temparature of Chon-jung(CV17 ), Chung-wan(CV12 中脘), Gwan-won(CV4 關元), Yang-mun(ST21 梁門), Chun-chu(ST25 天樞), Su-do(ST28 水道) between the patients group and the control group, the patients group were lower than the control group except for Chon-jung(CV17 ), Gwan-won(CV4 關元), but the statistical significance was not. Considering the thermal difference of Chon-jung(CV17 ) and Chung-wan(CV12 中脘), Gwan-won(CV4 關元), Yang-mun(ST21 梁門), Chun-chu(ST25 天樞), Su-do(ST28 氷道) between the patients group and the control group, the temparature deviation of Chon-jung(CV17 ) and Chung-wan(CV12 中脘), Chon-jung(CV17 ) and Yang-mun(ST21 梁門) was significant. We suggest that coldness of upper abdomen is significant in diagnosis of Dam Hun(痰暈).

• Journal of Chest Surgery
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• v.43 no.5
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• pp.546-549
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• 2010

A 70-year-old man was transferred to our center due to severe epigastric and back pain with the impression of a ruptured thoracic aortic aneurysm. Six months previously, he had undergone insertion of stent graft into the descending thoracic aorta at another hospital. The findings of the computed tomographic scan suggested a rapidly growing malignant mediastinal tumor rather than a ruptured aneurysm. Exploratory thoracotomy confirmed the diagnosis and the tumor was resected along with the portion of the aorta contained in it. This exemplary case should raise the concern against overzealous application of endovascular aortic repair.

• Tuberculosis and Respiratory Diseases
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• v.41 no.1
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• pp.36-41
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• 1994

Angiosarcoma is a very rare malignant tumor of endothelial cell origin. We experienced a case of angiosarcoma presented with massive pleural effusion, which was considered as a metastasis from right kidney. A 44-year-old male patient was admitted due to dyspnea for one month. He had a history of transient hematuria 3 months before admission, which disappeared spontaneously. Chest roentgenography showed total haziness in left hemithorax with multiple nodular shadows in right lung. Abdominal ultrasonogram showed a single heterogeneous hyperechoic mass, measuring about $7.3{\times}7.1{\times}6.5cm$ in size in the upper and mid-pole of the right kidney, involving renal sinus. Computed tomography of the chest revealed highly enhanced multiple pulmonary and subpleural nodules with loculated pleurisy. In bronchoscopic finding, a fungating, hypervascular tumor mass was noticed at the orifice of anterior basal segment of left lower lung after removal of tenaceous mucus. Pleural and bronchoscopic biopsies showed findings of angiosarcoma confirmed by immunochemical stains with factor VIII related antigen(+), laminin(+) and vimentin(+), and by characteristic electronmicroscopic findings. Massive pleural effusion was controlled with several times of pleurodesis in both pleural spaces.