• 한국정밀공학회지
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• 제24권9호
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• pp.37-43
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• 2007

• 대한수의학회지
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• 제39권3호
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• pp.628-634
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• 1999

We have studied, by a nonisotopic in situ end-labeling(ISEL) technique, frequency of apoptosis in the external granular layer(EGL) of the cerebellum of immature mice by ${\gamma}$-rays irradiation from $^{60}Co$ or diagnostic ultrasound exposure. The total number of normal cells and cells showing morphological features of apoptosis were counted. The frequency of apoptotic cells was expressed as a percentage of the total number of cells in EGL. The extent of changes following 200 cGy(1090 cGy/min) was studied at 2, 4, 6, 8, 12, or 24 hours after exposure. The maximal frequency was found 6~8 hours after exposure. The immature mice that received 18, 36, 54, 108, 198, 396 cGy of ${\gamma}$-rays or diagnostic ultrasound(7.5MHz, 4.2mW, $I_{SPTA}=7.9mW/cm^2$, $I_{SPTA}=114.3W/cm^2$) for 10 or 30 minutes were examined 6 hours after irradiation. Measurements performed after ${\gamma}$-ray irradiation showed a dose-related increase in apoptotic cells in each of the mice studied. The dose-response curves were analyzed by a linear-quadratic model ; frequency of apoptotic cell in the EGL was y = $(0.1349{\pm}0.01175)D$+$(-0.0001522{\pm}0.0000334)D^2$+0.048($r^2$ = 0.981, D = dose in cGy). In the experiment of ultrasound exposure, the frequency of apoptotic cell was $0.106{\pm}0.130$(10 minutes exposure) and $0.167{\pm}0.220$(30 minutes exposure). We estimated the relative dose of the yield from the experiment with ultrasound by substituting the yield from ultrasound exposure into the curve from the ${\gamma}$-irradiation. The relative dose of ultrasound exposure compared with ${\gamma}$-irradiation were 0.432 cGy(10 minutes exposure) and 0.885 cGy(30 minutes exposure). We have found that there is no evidence to indicate that diagnostic ultrasound involves a significant risk.

• 대한정형외과 초음파학회지
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• 제6권2호
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• pp.81-93
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• 2013

본 종설에서는 요추부 중재술에 있어서 초음파라는 장비가 영상 장치로서 얼마나 유용한가에 대해 기술하였다. 우선 요천추부의 표면 해부학과 초음파 해부학에 대하여 기술하였는데, 이는 초음파 유도하 중재술에서 영상의 판독과 술기의 수행에 있어 해부학의 자세한 이해가 반드시 필요하기 때문이다. 방사선 투시하에 척추 중재술을 하는 것이 보편화 되어 있지만 방사선을 피폭해야 하는 문제가 늘 존재한다. 초음파는 방사선이 없고 간편하며 높은 정확도로 실시간 영상을 제공하는 장점들이 있으며 어떠한 임상 환경적 조건에서도 시행할 수 있다. 초음파 유도하 요추부 중재술은 방사선 투시기나 컴퓨터 단층촬영 유도로 시행하였던 기존의 방식을 대신할 수 있으며 방사선 피폭 없이 안전하게 시행할 수 있는 방법이다.

• Journal of Biosystems Engineering
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• 제31권6호
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• pp.506-513
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• 2006

The effects of ultrasound stimuli on the germination and sprout growth of brown rice were investigated. Ultrasound was applied to brown rice at the frequencies of 28, 40, and 60 kHz before germination test and it was germinated in three methods (Type I, II and III). Type I was to soak brown rice into water for 60 hours. Type II was to expose brown rice to air for 48 hours after soaking them into water for 12 hours. Type III was a repetitive method of water-soaking and air exposure for 12 hours respectively. The most effective method for the germination was Type III without ultrasound. However, Type I was a best method after ultrasound treatment. As power of ultrasound increased, sprouts grew faster after brown rice were treated in 40%, 70%, and 100% power (0.137, 0.241, and 0.344 $W/cm^2$) at 40 kHz. The good treatments for fast sprout growth of brown rice at each frequency were the 28 kHz-10min group, the 40 kHz-5min group, and the 60 kHz-20min group of Type I. The best effective treatment was the 40 kHz-5min group at 0.344 $W/cm^2$ and at that condition the time required for sprout growth of 2.5 m was 51.9 hours. The ultrasound stimuli was very effective in the beginning of the rice germination, and the germination ratio was more than 95% in all ultrasound treatments.

• 대한방사선기술학회지:방사선기술과학
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• 제18권2호
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• pp.75-86
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• 1995

Embryos and fetuses are more sensitive to various environmental agents than adults of children biological effects following the exposure, such as intrauterin, malformation, have intimate conception with the prenatal exposure. There have been many studies on radiation and other agent. However, imformation about the ultrasound effects is limited. It is very important to study the effect of ultrasound with these kinds of fatera in consideration of ultrasound protection and safty. In this study, embryonic and fefal effects of ICR mouse embryos irradiated on 24, 48, 12 and 192 hpc of preimplantation and organogenesis period at the intensity of $0.5{\sim}3\;W/cm^2$ were investigated. Many type of external malformation observed in mouse irradiated on 72 hpc and 192 hpc. However, the embryos irradiated on 24 hpc and 48 hpc, at witch embryos had less then 6 cells and were pre-compaction stage, had no sensitivity for external malformation. The threshold doses of external malformation in mouse irradiated on 72 hpc and 192 hpc, at which embryos were consisted of $16{\sim}32$ cells and neural formation stage, were $1\;W/cm^2$ and $0.5\;W/cm^2$.

• Pediatric Gastroenterology, Hepatology & Nutrition
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• 제25권1호
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• pp.87-91
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• 2022

Ingestion of foreign bodies (FBs) is a common phenomenon among young children. Plain radiography is the first step diagnostic modality to detect the radio-opaque FBs. And computed tomography has been recommended by several guidelines as useful modalities for diagnosing ingested FBs. However, there is a risk of radiation exposure, making it burdensome to use in asymptomatic patients. Ultrasound (US) is not a commonly used technique for diagnosing ingested foreign bodies. However, US can provide real-time imaging with good resolutions without radiation exposure in pediatric patients. Herein, we report two pediatric cases of metallic foreign body ingestion that were successfully diagnosed using US for localizing foreign bodies. This study indicates that US may be used as an alternative method for detecting the localization of metallic foreign bodies in the gastrointestinal tract without exposure of radiation, particularly in pediatric patients.

• The Korean Journal of Pain
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• 제26권2호
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• pp.111-124
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• 2013

Ultrasound has emerged to become a commonly used modality in the performance of chronic pain interventions. It allows direct visualization of tissue structure while allowing real time guidance of needle placement and medication administration. Ultrasound is a relatively affordable imaging tool and does not subject the practitioner or patient to radiation exposure. This review focuses on the anatomy and sonoanatomy of peripheral non-axial structures commonly involved in chronic pain conditions including the stellate ganglion, suprascapular, ilioinguinal, iliohypogastric, genitofemoral and lateral femoral cutaneous nerves. Additionally, the review discusses ultrasound guided intervention techniques applicable to these structures.

• Clinical Pain
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• 제20권2호
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• pp.93-98
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• 2021

The use of ultrasonography has recently been increasing in musculoskeletal diagnosis or intervention treatment. Ultrasound guided procedure offers a reliable alternative to fluoroscopy or computed tomography for lumbar medial branch block, facet joint block and peripheral nerves of lower extremity. Further, there is no exposure to radiation and additional equipment necessary for the protection against radiation is required. And ultrasound guided procedure needs smaller space than fluoroscopy guided procedure with real time images in the outpatient department. This article reviews ultrasound guided procedure at lumbar vertebra and peripheral nerves of lower extremity.

• 한국방사선학회논문지
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• 제15권7호
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• pp.1057-1064
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• 2021

본 연구는 초음파 조직검사 시에 실내 공기 중 HCHO 농도변화를 관찰하고자 실제 조직검사와 동일한 환경조건을 모사하여 진행하였다. 초음파 검사실의 밀폐, 환기, 포르말린 용기 개봉, 포르말린 용기 밀봉, 재환기의 다섯 단계를 연속적으로 진행하며 실내의 HCHO 농도변화를 측정하였다. 측정한 HCHO 농도변화는 그래프를 이용하여 시각화하였다. 3회에 걸쳐 측정된 농도 변화값의 일치도를 급내상관계수를 이용하여 분석한 결과, 상관계수 값이 0.989로 통계적으로 유의한 결과를 나타내었다(p<0.05). 연구 결과를 토대로 영상의학적 검사 분야에서 HCHO의 노출 환경 내에 근무하고 있는 의료종사자들 스스로 업무 중 노출 관리 필요성에 대한 인식개선과 더불어 노출 관리를 위한 환경구축 및 대책 마련에 대하여 적극적인 논의가 이루어지길 바란다.

• 대한정형외과 초음파학회지
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• 제6권2호
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• pp.94-100
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• 2013

근골격계 초음파는 방사선 노출에서 자유로우며, MRI 에 비해 저렴한 가격, 외래에서 쉽게 시술할 수 있는 접근성, 또한, 이학적 검사와 함께 병행하면서 검사의 정확성을 더 높일 수도 있는 독특한 장점을 가지고 있다. 스트레스 검사와 함께 동적으로 시행하는 초음파 검사는 건, 인대, 신경 등의 숨은 병변을 확인하는 데에 유용한 것으로 알려져 있다. 주관절 초음파는 관절면, 활액막 공간에 대한 검사, 외측 상과염, 내측 상과염 등의 건 관련 질환이나 말초 신경의 병적 상태에 대한 진단 및 초음파 유도하 전, 후방 점액낭 및 관절내 주사를 위해 외래에서 손쉽게 사용될 수 있다.