• The Journal of Korean Orthopaedic Ultrasound Society
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• v.2 no.1
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• pp.37-44
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• 2009

Prolotherapy, the technology for strengthening lax ligaments, has found increased acceptance in recent years. Prolotherapy involves the injection of the irritant solutions into the weakened or stretched ligaments which are a source of chronic pain. This induces an inflammatory response which mimics the normal repair sequence. Various musculoskeletal disorders of lower extremities such as degenerative arthrtitis, ligament and tendon injuries can be treated with prolotherapy. Prolotherapy is a very good, powerful nonsurgical conservative treatment in various musculoskeletal disorders. Ultrasound exam is very useful to find and confirm the exact location of disorders and check the progress in prolotherapy practices.

• The Journal of Korean Orthopaedic Ultrasound Society
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• v.4 no.1
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• pp.42-49
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• 2011

Ultrasonography is a powerful and useful method for the examination of the various shoulder diseases. The use of high-resolution transducer and technical evolution allowed the improvement of the accuracy of detection of various shoulder pathology including the rotator cuff disease. However, its limitation is that there is marked disparity in the interpretation according to the operators' experience. This article describes the appropriate scan technique of ultrasonography around shoulder.

• The Journal of Korean Orthopaedic Ultrasound Society
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• v.5 no.2
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• pp.112-117
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• 2012

Septic arthritis of the elbow is a rare, but serious disorder in neonates. However, neonates often present with few systemic signs other than irritability or poor feeding. When the clinical findings are minimal or absent, joint aspiration gives us helpful information in making a diagnosis. Although many clinicians rely on its result, we experienced a case of early clotted joint effusion, which resulted negative joint aspiration in a neonate with septic elbow arthritis. Ultrasonography helped us to make an early decision to perform surgical intervention as showing different echogenicity of intracapsular portion from generally presented in septic effusion. Presenting case shows that ultrasonography can be an excellent second step examination of neonatal elbow presenting atypical clinical findings of septic arthritis.

• The Journal of Korean Orthopaedic Ultrasound Society
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• v.2 no.1
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• pp.45-52
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• 2009

Simple radiography, CT and MRI were used for the diagnosis of the hip disease. However ultrasonography could be a good diagnostic tool for the lesion of tendons and bursae. Another advantage of ultrasonography is its usefulness for the follow-up of these lesions. Nowadays hip ultrasonography expanded the horizon to the follow-up study of total hip arthroplasty. However, the limitation of ultrasonography is that there is disparity in results according to the physician's experiences. In this article ultrasonographic findings of normal structures and pathologic lesions of the hip joint are introduced and explained briefly.

• The Journal of Korean Orthopaedic Ultrasound Society
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• v.1 no.2
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• pp.122-127
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• 2008

Ultrasonography is a powerful and useful method for the examination of the various shoulder diseases. The use of high-resolution transducer and technical evolution allowed the improvement of the accuracy of detection of the rotator cuff disease. However, its limitation is that there is marked disparity in the interpretation according to the operators' experience. This article describes the ultrasonographic findings of rotator cuff pathology compared to the MR (magnetic resonance) imaging and arthroscopic findings for helping the interpretation of ultrasonographic picture.

• Proceedings of the Korean Society of Precision Engineering Conference
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• 2004.05a
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• pp.160-160
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• 2004

초음파 여기를 이용한 물체 이송 시스템은 최근 급속히 발달하고 있는 광산업이나 반도체 산업에서 기존의 이송 시스템의 단점을 보완하기 위해 개발되었다. 기존의 이송 시스템들은 이송공정이나 검사 공정 등에서 광소자의 표면손상이나 자기장에 의한 반도체 소자의 전자적 배열의 손상이 우려되었다. 하지만 PZT 액츄에이터로 구동되는 초음파 발생장치(Ultrasonic wave generator)에서 발생한 초음파 여기를 이용하여 물체를 이송시킬 경우 이러한 단점은 보완된다.(중략)

• Journal of the Korean Society of Radiology
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• v.17 no.6
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• pp.919-927
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• 2023

Elastography utilizes the fact that the tissue of a malignant tumor is harder than that of a benign tumor and increases the specificity of diagnosis according to the elastic modulus of the tumor, helping to reduce unnecessary biopsies. However, the reliability of elastography can be influenced by the equipment used and the examiner's skills. In this study, the researchers analyzed the reproducibility of elastography by evaluating phantom images when measuring the elasticity values repeatedly. Phantoms were created using silicone and gelatin with different levels of stiffness, and they were inserted at varying depths from the surface. The elasticity values were measured using shear wave elastography. The study aimed to determine whether the reproducibility of elasticity values remains consistent depending on the stiffness and depth of the lesions. The experimental results showed that there was no statistically significant correlation between the elasticity values obtained through shear wave elastography and the depth or stiffness of the lesions. However, in the lesions with the lowest stiffness, the elasticity values were statistically significant (p<0.001) and showed a high correlation with the depth of the lesions. Although there were variations in the measured elasticity values based on the differences in lesion stiffness and depth, these differences did not significantly impact the diagnosis. Therefore, shear wave elastography remains a reliable diagnostic method, and it is suggested that it can be helpful in the diagnosis of breast lesions.

• The Journal of Korean Orthopaedic Ultrasound Society
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• v.8 no.1
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• pp.26-30
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• 2015

There are many traumatic foot and ankle problems in orthopaedic fields. Though it is not life-threatening problems, a delay in accurate diagnosis and treatments can danger limb function and therefore correct diagnosis can prevent long-term complications. Achilles tendon rupture is relatively common injury for active sports people. Ultrasonography is cost-effective, irradiation -free, effective for evaluation of soft tissues and dynamic analysis. It has been growing importance in Achilles tendon rupture. Ultrasonography is a diagnostic tool in Achilles tendon rupture. Physical examination and patient history is needed to diagnose Achilles tendon without image, but it is missed up by 20% in private clinic. Discontinuity of normal fibrillar architecture seen on an ultrasonographic image is diagnostic for Achilles tendon rupture, and can be accentuated by the performance of dorsi-flexion and plantar flexion, while observing in real time. And ultrasonography is a reliable method for serial observation after surgical treatment or conservative treatment.

• Korean Journal of Clinical Laboratory Science
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• v.53 no.1
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• pp.131-136
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• 2021

Duplex sonography is used widely in various medical fields because of its repeatability and low cost. In particular, the carotid duplex sonography is a useful non-invasive test for diagnosing cerebrovascular disease and predicting the prognosis. In clinical practice, it is very important to reduce the test time and improve accuracy. The patient's clinical information must be known in advance to perform carotid duplex sonography quickly and accurately. Despite this, there are often difficulties finding new cervical vascular diseases that are not mentioned in the clinical information. Therefore, knowing a variety of cases can lead to fast and accurate results. In this context, this paper reports three cases of cervical vascular disease discovered unexpectedly during carotid duplex sonography: CASE 1, internal carotid artery occlusion and cerebral arteries branched from the external carotid artery; CASE 2, internal jugular vein thrombosis; CASE 3, microembolism observed in the vertebral artery.

• Proceedings of the KIEE Conference
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• 2008.09a
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• pp.98-105
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• 2008

철도차량 차축의 초음파 탐상은 기존 펄스-에코방식을 사용하여 A-Stan으로 영상화하여 결함평가가 이루어 졌다. 하지만 이 방법은 작업자의 판단에 의존하므로 신뢰성이 멀어졌다. 위상배열 초음파 탐상 검사는 단일 탐촉자에 여러개의 진동자를 배열하여 여러 각도에서 탐상이 가능하므로 차축처럼 종류 및 모양이 다양한 구조물의 탐상에 효과적이다. 또한 C-Scan방식으로 영상화 하므로써 작업자가 결함을 판단하는데 있어서 객관적인 평가방법이다. 이 논문에서는 위상배열 초음파 탐상 검사에 대하여 설명하고 차축결함평가를 위한 자동화된 설비의 논리설계를 분석하고 그 실험의 방법과 결과론 고찰하고자 한다.