• Journal of the Korean Society of Surveying, Geodesy, Photogrammetry and Cartography
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• v.5 no.2
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• pp.47-55
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• 1987

In this paper, the direct linear transformation is described in which a inner and exterior orientation parameters are treated as unknown for non-iterative direct space resection, and the computer program was developed to obtain object space coordinates. Image coordinates measurements are conducted with analogue stereo-plotter and digitizer. To prove the appropriateness of the two image coordinate measurement devices and the DLT method, the standard errors of object space coordinates are compared with semi-analytical method.

• Journal of Medicine and Life Science
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• v.16 no.1
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• pp.27-30
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• 2019

We describe a case of a 48-year-old Korean woman who had a subepithelial mass incidentally discovered by endoscopic examination. Endoscopic mucosal resection revealed a well-circumscribed whitish solid mass within the submucosal space. Microscopically, the tumor was comprised of sparse spindle cells in the dense collagenous stroma with several calcifications and lymphoid aggregates. Immunohistochemical analysis showed that the tumor cells are negative for c-kit, smooth muscle actin, desmin, S-100 and CD34. Based on these findings, the tumor was diagnosed with calcifying fibrous tumor.

• Journal of Chest Surgery
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• v.25 no.8
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• pp.850-855
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• 1992

Dead space of empyema occurrs from incomplete obliteration of infected pleural space from pulmonary tuberculosis, pyogenic infection, esophageal disease and post pulmonary resection. Chronic empyema can be treated by obliteration of dead space with autologous tissues such as, extrathoracic muscle flap and omental flap and thorachoplasty. Between May, 1986 to July, 1991 we treated 17 chronic empyema patients with autologous tissues and analysed the result. 1. Sex distribution was 14 males and 3 females between 5~62 years old. [mean 39.7 years old] 2. The volume of the dead space ranged from 100 to 450cc. [mean 213. 76cc] 3. The majority of used muscle flap were serratus anterior and latissimus dorsi, and there were 2 cases of am ntal flap. 4. The majority of underlying disease were pulmonary tuberculosis and there were 8 BPF[47%] in 17 patients 5. In 7 cases, thorachoplsty was needed. 6. Three cases recurred and there were no death.

• Maxillofacial Plastic and Reconstructive Surgery
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• v.41
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• pp.18.1-18.10
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• 2019

Background: Temporomandibular joint (TMJ) ankylosis during early childhood may lead to disturbances in growth and facial asymmetry and to serious difficulties in eating as well as in breathing during sleep. The purpose of this study is to describe the effectiveness of an interocclusal splint (IOS) for active mouth opening exercises in the treatment of TMJ ankylosis. Methods: A total of nine patients with 13 instances of TMJ ankylosis from 2008 to 2010 were included in this study, of which five patients were male and four patients were female. Five patients demonstrated unilateral ankylosis, while five patients showed bilateral symptoms. Ankylosed mass resection with coronoidectomy, fibrotic scar release, and resection of stylohyoid ligament calcification was performed with gap arthroplasty without an interpositional graft, and all patients were assessed for maximum mouth opening (MMO) during a mean 6.6-year follow-up period. Results: All patients were subjected to postoperative mouth opening exercises from the day of the operation with the help of an IOS, which was based on an impression taken during surgery. All patients were sufficiently comfortable moving their mandible according to the IOS's guiding plane and impingement, and satisfactory results were achieved, in which MMO was improved by 35 mm more than 6 years after surgery. Conclusions: Complete and adequate resection of the ankylosed mass and postoperative active mouth opening exercises are essential in the treatment of TMJ ankylosis. Moreover, a more comfortable mouth opening guide and interdigitation can be achieved using an IOS, and newly organized fibrosis in the gap space between the newly made resected condylar head and temporal fossa can be suggested.

• Archives of Craniofacial Surgery
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• v.20 no.6
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• pp.388-391
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• 2019

Schwannoma is a slow-growing, well-demarcated, benign soft tissue tumor of the peripheral nerve sheath. It commonly develops in the head and neck region, usually in the parapharyngeal space. In this case, a 42-year-old woman visited the outpatient department to manage a painless mass on her left cheek. She had no history of concern and no neurological symptoms were observed. In the enhanced computed tomography scan, a 2.8×2.8×1.8 cm, heterogeneously enhanced tumor was detected in the left masseter muscle. A tumor resection under general anesthesia was planned. For the resection, a facelift incision was chosen; branches of the facial nerve were identified and retrogradely dissected. A well-marginated, yellowish, solid mass was found in the left masseter muscle. The mass was excised and given a histopathological diagnosis of schwannoma. A definite diagnosis of schwannoma, originating in the masseter muscle, is difficult to arrive at with radiographic findings alone; it is often misdiagnosed as intramuscular hemangioma. Histopathological examinations, including fine-needle aspiration or histological biopsy after surgery, are necessary. Using a facelift incision with retrograde facial nerve dissection, tumor resection in an intramasseteric lesion can be performed efficiently, without nerve damage, or leaving conspicuous scars on the face.

• Journal of Korean Society for Geospatial Information Science
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• v.7 no.2 s.14
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• pp.143-153
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• 1999

GIS have become easier to use and very popular. In recent year digital photogrammetric systems ire becoming cost-effective tools to build and update GIS databases. In close-range photogrammetry for the acquisition of geospatial data, the bundle adjustment needs both initial approximate values and control points to solve the exterior orientation parameters. This paper gives a review of applied and potential algorithms for estimating Initial approximate values before the bundle adjustment, develope new algorithms for determine the exterior orientation parameters, and gives a cost-effective methods for close-range digital photogrammetric system Modifications of existing DLT algorithm were made in this study for providing an efficient, economic, and more accurate photogrammetric data reduction technique. These modifications include robust approaches for automatic detection and elimination of all lands of gross errors in the measurement data, and incorporation of GPS to reduce the number of control points necessary for a DLT solution. Also, this paper derives a new method for space resection from a monocular image. A major advantage of proposed method is that the solution can be uniquely and analytically determined without initial approximate values of exterior orientation parameters and without iterative computation.

• Journal of Chest Surgery
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• v.32 no.1
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• pp.92-95
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• 1999

The patients with prolonged air leak after lung resection surgery were generally treated by pleurodesis with sclerosing agents such as talc, tetracyclin, doxycyclin, bleomycin, vibramycin, and OK432. However, for the case like dead space resulted by incomplete reexpansion of the remaining lung, chemical pleurodesis has shown to be not as effective as expected. If the patients keep the chest tube for long period of time, the risk of thoracic empyema would increase. Most thoracic surgeons have experienced prolonged airleak which developed after lung resection. Pleurodesis with autoblood was reported as an effective method in treatment of patients with prolonged airleak. The mechanism of blood pleurodesis may be direct obliteration of BPF and reduction of dead space by clot. Therefore we successfully treated the two patients with prolonged airleak using the autoblood plus OK432 or vibramycin.

• Journal of the Korean Society of Surveying, Geodesy, Photogrammetry and Cartography
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• v.5 no.2
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• pp.37-46
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• 1987

The single photo method has a lot of applications in forestry, traffic accident managements, industry, criminal investigation, and in daily life. In this study a new single photo method was developed by classifying into the Space resection method and the 2 Dimensional Perspective Transformation method. Metric and nonmetric cameras were used to analyse the accuracy by means of single photo method, and the errors in coordinates and lengths were studied by changing the number and arrangement of control points to obtain the optimum condition for the single photo method. The influence of number and arrangement of control points on the accuracy was relatively small in case of the Metric WILD P31 and ASAHI PENTAX 6$\times$7 cameras, where as for errors it was a major factor in the Non-metric Nikon FM2. To overcome these defects, at least 6 control points should be used for the errors to be convergent and they should be distributed evenly over the surveying area. It was found that accuracy increased as the object to be photographed was placed in the perpendicular direction to the axis of camera.

• Journal of Chest Surgery
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• v.24 no.1
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• pp.64-71
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• 1991

Pulmonary aspergillosis is a rare disease, most commonly presenting pre-existing cavitary disease. In Department of thoracic and cardiovascular surgery, Chonbuk National University, 5 patients have been recognized as having this disorder from 1988 to 1990, June. Of the 5 patients, three were female and two were male. Age ranged from 30 to 53 years, the average age was 38.4 years. The most common presenting symptoms were blood-tinged sputum, hemoptysis, coughing, and chest pain Pulmonary tuberculosis occupied 8-% of underlying pulmonary disease. The locations of lesion were right upper lobe in 3 cases, left upper lobe in 1, and right lower lobe in l. All of these patients were treated by surgical resection. The operative procedures were as follows: lobectomy, 3 cases; segmentectomy, 1 case; lobectomy and segmentectomy, 1 case. There was no death in early and late postoperative period. Empyema and dead space developed in two cases, respectively. The postoperative empyema was treated with open thoracostomy and the dead space was carefully observed. During follow-up, there was no recurrence.

• Transactions of the Korean Society for Noise and Vibration Engineering
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• v.20 no.3
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• pp.308-315
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• 2010

This study introduces a new technique to estimate modal parameters of a vibrating string using motion pictures. The approach requires two motion pictures for a vibrating string captured simultaneously by typical potable digital cameras or camcorders. Applying the space intersection theory and the space resection theory in photogrammetry, the steroscopic images for the string are constructed from two flat plane pictures. Then the three dimensional displacement components of the string are extracted by a multiple template matching technique. Finally the modal parameters of the string are estimated from the resulting displacement time histories. The accuracy of the approach has been examined through a small-scale mock-up of a string.