• Proceedings of the Korean Society of Propulsion Engineers Conference
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• 2017.05a
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• pp.1192-1195
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• 2017

This paper describes the heat resistance characteristics of the imaging device installed in behind the engine due to monitoring the engine condition, and this paper includes the introduction and development of the imaging probe. Because the imaging device which is at the rear end of the engine is exposed to a high temperature and high pressure, the stability of the device should be secured by changing the device shape and supplying cooling water. The imaging probe in ADD engine test facility is installed at the rear end of the engine, and it is designed by reflecting the heat resistance characteristics to ensure the stability of the device.

• Journal of Veterinary Clinics
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• v.39 no.4
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• pp.177-184
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• 2022

Caval syndrome is a severe complication of canine heartworm disease in which affected dogs present with various clinical signs that are often life-threatening. In cases of severe infection, adulticidal treatment has numerous complications as a result of a marked immune response against dead worms. Therefore, several surgical and non-surgical methods, including interventional extraction, have been applied in veterinary medicine. Despite the usefulness and efficiency of conventional retrieval devices, a few associated limitations must be addressed to reduce their risks and increase their applicability. Herein, we introduced a case of treating three dogs with caval syndrome by applying a newly developed heartworm basket device. The dogs were diagnosed with heartworm disease by heartworm antigen testing and direct smear. Imaging findings revealed remarkable remodeling of the right heart and pulmonary vessels and the presence of heartworms in the right heart. Additionally, heartworms were confirmed in the distal part of the abdominal aorta and femoral arteries in one dog, indicating aberrant systemic migration of the worms. Under general anesthesia, the heartworm basket device was introduced into the right heart via femoral venotomy and arteriotomy in one dog and jugular venotomy in the other two dogs. Although the number of cases in this study was small, the basket device was successful in gradual and cautious extraction of the heartworms in all three dogs. They exhibited good prognosis of clinical symptoms as indicated by imaging analyses.

• Journal of Veterinary Clinics
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• v.41 no.3
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• pp.157-164
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• 2024

The standard radiation protection method in the angiography suite involves the use of a thyroid shield, a lead apron, and lead glasses. However, exposure to substantial amounts of ionizing radiation can cause cataracts, tumors, and skin erythema. A newly developed curtain-type radiation protection device consists of a curtain drape composed of a five-layer bismuth and lead acrylic head-shielding plate, with both bearing an equivalent 0.25 mm lead thickness. In this study, a quality assurance phantom was used as the patient to create radiation scatter from the radiographic source, and an anthropomorphic mannequin phantom was used as the interventionalist to measure the radiation dose at seven different anatomical locations. Thermoluminescent dosimeters were used to measure the radiation dose. The experimental groups consisted of all-sided or one-sided curtain set-ups, the presence or absence of a conventional shielding system, and the orientation of beam irradiation. Consequently, the curtain-type radiation protection device exhibited better radiation protection range and capabilities than conventional radiation protection systems, especially in safeguarding the forehead, eyes, arms, and feet, with minimal radiation exposure. Moreover, the mean shielding ratios of the conventional shielding system and curtain-type radiation protection device were measured at 51.94% and 93.86%, respectively. Additionally, no significant decrease in the radiation protection range or capability was observed, even with changes in the beam orientation or one-sided protection. Compared with a conventional shielding system, the curtain-type radiation protection device decreased radiation exposure doses and improved comfort. Therefore, it is a potential new radiation protection device for veterinary interventional procedures.

• Journal of Korea Multimedia Society
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• v.15 no.10
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• pp.1264-1272
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• 2012

Three-dimensional volume rendering method which shows the inside of human body is widely used in medical imaging area. Existing medical imaging system using a volume rendering method already has provided a variety of three-dimensional results. Recently existing results in the medical imaging among physicians and patients to facilitate communication have been studied since smart device which has advantage of portability applied in the medical imaging. In this paper, we propose 3D volume visualization system for a relatively low spec portable smart devices by using 2D textures and we also implements 2D diagnostic images of portable medical imaging visualization system.

• Investigative Magnetic Resonance Imaging
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• v.25 no.4
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• pp.218-228
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• 2021

Due to their high degree of freedom to transfer and acquire light, fiber optics can be used in the presence of strong magnetic fields. Hence, optical sensing and imaging based on fiber optics can be integrated with magnetic resonance imaging (MRI) diagnostic systems to acquire valuable information on biological tissues and organs based on a magnetic field. In this article, we explored the combination of MRI and optical sensing/imaging techniques by classifying them into the following topics: 1) functional near-infrared spectroscopy with functional MRI for brain studies and brain disease diagnoses, 2) integration of fiber-optic molecular imaging and optogenetic stimulation with MRI, and 3) optical therapeutic applications with an MRI guidance system. Through these investigations, we believe that a combination of MRI and optical sensing/imaging techniques can be employed as both research methods for multidisciplinary studies and clinical diagnostic/therapeutic devices.

• Transactions of the Korean Society of Mechanical Engineers A
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• v.32 no.8
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• pp.654-659
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• 2008

This paper is to suggest a concept design of the permanent magnet type magnetic resonance imaging (MRI) device based on the parameter optimization method. Pulse currents in the gradient coils will introduce the effect of eddy currents in the ferromagnetic material, which will worsen the quality of imaging. In order to equalize the magnetic flux in the MRI device for good imaging, the eddy current effect in the ferromagnetic material must be taken into account. This study attempts to use the design of experiment (DOE) and the response surface method (RSM) for equalizing the magnetic flux of the permanent magnet type MRI device using that the magnetic flux can be calculated directly using a commercial finite element analysis package. As a result, optimal shapes of the pole and the yoke of the PM type MRI device can be obtained. The commercial package, ANSYS, is used for analyzing the magnetic field problem and obtaining the resultant magnetic flux.

• KIPS Transactions on Computer and Communication Systems
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• v.6 no.1
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• pp.17-24
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• 2017

As the prevalence of removable device, critical intelligences are often stored in the removable device. For that reason, in seizure and search, the removable device became a important evidence of while it could be has a salient key for prove a crime. When we acquired a removable device for proof, we image it by a imaging device or software with a write protection. However, these are high-priced exclusive equipments and sometimes it could be out of order. In addition, we found that some secure USB and inbuilt vaccine USB are failed to connect to the imaging device. Therefore, in this paper, we provide a suitable digital evidence collection procedure for real.

• Journal of the Korean Society of Radiology
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• v.11 no.4
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• pp.253-262
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• 2017

In lateral projection imaging method of knee joint, a method that adjusts the incidence angle of central X-ray toward the head side to $5{\sim}7^{\circ}$ in true lateral position which is existing recommended is called imaging method A, Method of imaging the central X-ray perpendicular to the horizontal plane of the examination table toward the knee is called imaging method B, and a method in which the central X-ray is perpendicularly applied to the joints while the lateral side of the distal tibia is compensated by radiolucent materials is called as method C. After tests each imaging method to classified study subject respectively, the joint space distance and the distance between lateral and medial condyle of femur were measured and compared as the quantitative index from the three imaging methods. In addition, the convenience of each imaging method was confirmed through questionnaires to practician. According to the result of the quantitative index, there is no statistically significant difference in imaging method A and C(p>0.05). However, imaging method B showed a significant difference in both A and C(p<0.05). As a result of evaluating the convenience of the imaging method, imaging method A was relatively assessed lower in all items than imaging methods B and C, and as a small difference, imaging method B is assessed higher than C. In this study suggested new knee joint lateral projection imaging method, by using a simple support device, could describe joint space as not much different as existing recommended method without some complex process, and could increase convenience of the practician in the process of the imaging.

• Journal of Chest Surgery
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• v.53 no.5
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• pp.310-312
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• 2020

Transcatheter leadless pacemaker dislodgment is a rare and potentially fatal complication of leadless device implantation. We present the first case of multidetector computed tomography images of leadless pacemaker migration and embolization in the pulmonary middle lobe artery. The patient was managed by percutaneous retrieval of the dislodged device and re-implantation in the appropriate position.

• Korean Journal of Acupuncture
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• v.24 no.4
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• pp.37-45
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• 2007

Objectives : Temporomandibular joint (TMJ) balance is known to be intricately integrated with nervous system, cervical spine, and meridian system balance. This retrospective study with one-group pretest-posttest design reviewed cervical spine imaging data to provide evidence of spinal alignment improving effect of TMJ balance treatment. Methods : Cervical spine imaging data including computed tomography and simple x-ray of 25 cases with painful condition were reviewed to explore any change in cervical alignment on wearing the intraoral device for TMJ balance treatment of functional cerebrospinal therapy. Results : Cervical spine alignment significantly improved on wearing the intraoral device. Conclusions : TMJ balance treatment improves cervical spinal alignment, which may be a firm basis to proceed with further research of TMJ balance therapy as a way of balancing the whole-body meridian system.