• 대한정형외과 초음파학회지
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• 제7권1호
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• pp.49-66
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• 2014

지금까지 경추부 중재술은 방사선 투시하에 하는 것이 표준화된 방법이었다. 그러나 방사선을 피폭해야 하는 문제가 있으며, 실시간으로 조영제를 이용하여 투시하거나 컴퓨터단층촬영 유도하 시술로써 안전하게 시행하려는 노력에도 불구하고, 특히 경추간공 차단술에서, 예기치 않은 주사제의 동맥내 주입이 발생하여 심각한 합병증인 척수 손상, 소뇌 및 뇌간 경색 등의 증례들이 방사선 투시하 시술에서 보고되는 것이 사실이다. 최근에는 그 대안으로서 경추부 초음파 유도하 중재술이 시행되고 있는데, 초음파는 주요 신경 및 혈관 구조물들의 위치를 관찰하면서 목표 부위 주위로 주사제가 퍼져나가는 양상을 파악할 수 있다는 장점이 있기 때문이다. 또한 초음파는 방사선이 없고 간편하며 주사하는 동안 실시간으로 계속 영상을 제공함으로써 시술의 정확도를 높일 수 있는 술기이다. 결국 초음파 유도하 시술은 주요 신경과 혈관의 위치를 확인하면서 그에 대한 손상 혹은 주사를 피할 수 있기 때문에 이러한 구조물들의 손상 위험이 높은 경추부에서 안전하게 시행할 수 있다는 중요한 장점이 있는 술기이다. 그리하여 저자는 실시간 초음파 유도하라는 술기가 경추부 중재술에서 얼마나 유용한가에 대해 분석하여 기술하였다.

• 대한물리치료과학회지
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• 제27권3호
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• pp.56-66
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• 2020

Background: The purpose of this study was to investigate the effects of pulsed-ultrasound intervention and continued-ultrasound on the PPT (pressure pain threshold), CK (creatine kinase) and LDH (lactate dehydrogenase) recovery of before EIMD (exercise-induced muscle damage). Design: Randomized Controlled Trial. Methods: Thirty subjects who are student in their 20s at a university participated in this study, these subjects were assigned into three groups, a control group (n=10), experiment group I (n=10), and experiment group II (n=10). The subjects in experimental group were intervened by pulsed-ultrasound and continued-ultrasound, while ones on control group weren't by any intervention after induced EIMD. Results: First, In the comparison of the PPT, there were significant variations with the lapse the time in three groups (p<.001) and there was a significant interaction of time and group (p<.001). In the among group comparison, the PPT of experimental group II was significantly larger than those of other groups (p<.01). Second, In the comparison of the CK, there were significant variations with the lapse the time in three groups (p<.001) and there was a significant interaction of time and group (p<.001). In the among group comparison, the CK of experimental group II was significantly smaller than those of other groups (p<.001). Third, In the comparison of the LDH, there were significant variations with the lapse the time in three groups (p<.001) and there was a significant interaction of time and group (p<.001). In the among group comparison, the LDH of experimental group II was significantly smaller than those of other groups (p<.001). Conclusion: The above results revealed that the continued-ultrasound intervention before an exercise had a positive effect of muscle function after EIMD. Therefore we can consider the continued ultrasound as a considerable intervention method to prevent or reduce an exercise injury.

• 대한의용생체공학회:의공학회지
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• 제43권6호
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• pp.390-398
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• 2022

Ultrasound examination using ultrasound equipment is an ultrasound device that images human organs using sound waves and is used in various areas such as diagnosis, follow-up, and treatment of diseases. However, if the quality of ultrasound equipment is not guaranteed, the possibility of misdiagnosis increases, and the diagnosis rate decreases. Accordingly, The Korean Society of Radiology and Korea society of Ultrasound in Medicine presented guidelines for quality management of ultrasound equipment using ATS-539 phantom. The DenseNet201 classification algorithm shows 99.25% accuracy and 5.17% loss in the Dead Zone, 97.52% loss in Axial/Lateral Resolution, 96.98% accuracy and 20.64% loss in Sensitivity, 93.44% accuracy and 22.07% loss in the Gray scale and Dynamic Range. As a result, it is the best and is judged to be an algorithm that can be used for quantitative evaluation. Through this study, it can be seen that if quantitative evaluation using artificial intelligence is conducted in the qualitative evaluation item of ultrasonic equipment, the reliability of ultrasonic equipment can be increased with high accuracy.

• 대한의용생체공학회:의공학회지
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• 제30권1호
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• pp.66-78
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• 2009

A mobile ultrasound scanner developed for use in point-of-care applications is introduced, which can not only provide ultrasound images but can also measure various bio-signals. The mobile ultrasound scanner is also designed to meet the demanding requirements for point-of-care diagnosis, such as battery-powered operation, portability in terms of size and weigh, and real-time wireless communications capability for remote diagnosis. To meet these requirements, an efficient beamforming method for high resolution imaging with a small number of active elements, a hardware efficient beamformer architecture, and echo processing algorithms with greatly reduced computational complexity have been developed. Experimental results show that the prototype mobile ultrasound scanner is fully functional and satisfies most of the design requirements.

• Asian-Australasian Journal of Animal Sciences
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• 제28권3호
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• pp.318-322
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• 2015

In the modern pork industry, selection of high intramuscular fat (IMF) in pigs is necessary to improve pork quality. Ultrasound has been used previously to predict subcutaneous fat thickness and IMF in the longissimus muscles of line pigs and Real-time ultrasound has also been reported as a reliable method for estimating IMF in live pigs. So we estimate the correlation between meat quality traits and IMF percentage to investigate the possibility of utilizing real-time ultrasound technology for predicting IMF percentage in line pigs to improve pork quality. The genetic and phenotypic correlations for chemical intramuscular fat (CIMF) and ultrasound intramuscular fat (UIMF) were estimated to be 0.75 and 0.76, respectively. These results suggest that genetic factors strongly influence meat quality. The genetic and phenotypic correlation between UIMF and CIMF were 0.75, 0.76, respectively. The heritability of UIMF and CIMF were 0.48 and 0.50, respectively. So we concluded that CIMF can be replaced with UIMF and Ultrasound machines can be used to test IMF in live swine. In future, UIMF can be utilized to improve pork quality as an alternative to CIMF.

• 한국생물공학회:학술대회논문집
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• 한국생물공학회 2003년도 생물공학의 동향(XII)
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• pp.284-287
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• 2003

본 연구에서는 hGM-CSF를 생산하는 형질전환된 담배세포배양에서 ultrasound가 세포생장과 hGM-CSF 생산에 미치는 영향을 조사하였다. 세포의 생장은 ultrasound에 노출된 직후 약간의 저해를 보이지만 2일후에 정상의 세포와 비슷한 수준으로 회복되었다. 세포 외부로 분비되는 hGM-CSF는 ultrasound에 노출된 직후 증가하고 그 이후 감소하다 배양후반에 증가를 보였다. 세포내부에서 생산되는 hGM-CSF는 ultrasound 처리 이후 전반적으로 대조구보다 많이 생산됨을 보였다. 총 생산된 hGM-CSF는ultrasound에 노출 시킨 배양 6일째 $34.9\;{\mu}g/L$로 최대였으며 대조구보다 31.5%의 증가를 보였다.

• Macromolecular Research
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• 제15권1호
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• pp.44-50
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• 2007

This study investigated the effect of ultrasound irradiation on the blend of poly(lactic acid) (PLA) and poly(butylene adipate-co-terephthalate) (PBAT). The blends of PLA/PBAT(50/50) (PBAT50) were prepared in a melt mixer with an ultrasonic device attached. Thermal, rheological, and mechanical properties, morphology, and biodegradability of the sonicated blends were analysed. The viscosity of the sonicated blends was increased by the ultrasound irradiation owing to the strong interaction. The morphology of the sonicated blends was significantly dependent on the duration o the ultrasound irradiation. For PBAT50, the phase size reduction was maximized when the blends were ultrasonically irradiated for 30 sec. At longer duration of ultrasound irradiation, the PBAT phase underwent flocculation. Measurement of the tensile properties showed an increased breakage tensile stress and an enhanced Young's modulus when the blends were properly irradiated. This improvement was ascribed to better adhesion between the PLA matrix and the PBAT domain and to better dispersion of the PBAT phase. However, the tensile properties were maximized after excessive energy irradiation, which was ascribed to an emulsifying effect leading to coalescence of the PBAT phase. Impact strength was increased to reach a peak with the ultrasound irradiation, and was higher than the untreated sample for all sonicated samples due to the difference of failure mechanism between the tensile test and the impact test.

• Journal of Korean Neurosurgical Society
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• 제37권3호
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• pp.197-200
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• 2005

Objective: Ultrasound can be used in the treatment of large intracerebral hematoma. The authors present our experiences with Ultrasound-guided catheter placement for lysis and drainage of ganglionic hematoma, with emphasis on technical aspects. Methods: The authors applied real-time ultrasonography for the aspiration of intracerebral hematoma in 6cases. Ultrasound-guided aspiration via a burrhole was performed under local anesthesia. We selected a temporal entry point instead of the frequently used precoronal approach in ganglionic hematoma. A burrhole was made 4 to 6cm posterior from posterior border of frontal process of the zygomatic bone at the level of 4 to 5cm above the external auditory meatus. Results: In all patients, the catheter was placed accurately into the hematoma target. All patients were irrigated with urokinase once to three times a day. The catheter could be removed within two or three days. The mean hematoma volume was reduced from initially 32mL to 5mL in an average of two days. There were no intraoperative complications related to the use of real-time ultrasonography and no postoperative infections were noted. Conclusion: Ultrasound allows an easy and precise localization of the hematoma and the distance from the surface to the target can be calculated. Ultrasound-guided catheter placement for fibrinolysis and hematoma drainage is a simple and safe procedure.

• 한국수정란이식학회지
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• 제11권3호
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• pp.291-300
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• 1996

Real time B-mode ultrasound was used to detect the early conceptus in 187 Korean native cattles between days 10 and 60 after last insemination. The ultrasound diagnostic findings were systemically confirmed by palpation per rectum after the 60th day of last insemination. The embryonic vesicle and the embryo proper within the veside were first visible on mean day fl and 23, respectively. The heartbeat of the embryo proper could be detected on day 26, and the limb buds, placentomes, amnion, fetal movement, umbilical cord, optic area and split hooves were first visible on day 33, 34, 34, 44.5, 45, 32 and 48, respectively. The mean length of embryo proper was 3.8mm on day 23 which later increased to 56. 6rnrn on day 60. When ultrasound was used to detect the conceptus between days 20 and 30 after insemination and palpation per rectum after the 60th day of insemination, the accuracy rates of pregnancy detection by ultrasound scanning at days 20, 22, 24, 26, 28, 30 were 44.4, 69.2, 78.6, 87.5, 90.0, 93.3%. In summary, the early pregnancy diagnosis of Korean native cattle with ultrasound appears high accuracy rates. It is considered that ultrasound can be used in veterinary practice well.

• 대한물리치료과학회지
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• 제25권2호
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• pp.1-6
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• 2018

Background: This study was to examine the influence of BMI and PBF of adults in 20's through the Kettlebell exercise and ultrasound for 4 weeks. Methods: 24 adults men and women, whose BMI is over 23, was divided into 3 groups, group I (control group), group II (Kettlebell exercise group), group III (ultrasound treatment and Kettlebell exercise group). The ultrasound treatment was done before exercise for 15 minutes 3 times a week for 4 weeks, and exercise worked out with Kettlebell exercise during 15 minutes and were stretched for 10 minutes before and after exercise. Results: For 4 weeks of Kettlebell exercise and ultrasound, there was a statistically meaningful difference between group I and group III (p<.05). For 4 weeks, there was no statistically meaningful difference of BMI and PBF between group II and group. I Conclusion: A complex application of Kettlebell exercise and ultrasound treatment was thought to effective decreasing for BMI and PBF.