• 제목/요약/키워드: ultrasound

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초음파 영상 특성을 이용한 실시간 초음파 영역 추출방법 (Real-time Ultrasound Contexts Segmentation Based on Ultrasound Image Characteristic)

  • 최성진;이민우
    • 대한의용생체공학회:의공학회지
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    • v.40 no.5
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    • pp.179-188
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    • 2019
  • In ultrasound telemedicine, it is important to reduce the size of the data by compressing the ultrasound image when sending it. Ultrasound images can be divided into image context and other information consisting of patient ID, date, and several letters. Between them, ultrasound context is very important information for diagnosis and should be securely preserved as much as possible. In several previous papers, ultrasound compression methods were proposed to compress ultrasound context and other information into different compression parameters. This ultrasound compression method minimized the loss of ultrasound context while greatly compressing other information. This paper proposed the method of automatic segmentation of ultrasound context to overcome the limitation of the previously described ultrasound compression method. This algorithm was designed to robust for various ultrasound device and to enable real-time operation to maintain the benefits of ultrasound imaging machine. The operation time of extracting ultrasound context through the proposed segmentation method was measured, and it took 311.11 ms. In order to optimize the algorithm, the ultrasound context was segmented with down sampled input image. When the resolution of the input image was reduced by half, the computational time was 126.84 ms. When the resolution was reduced by one-third, it took 45.83 ms to segment the ultrasound context. As a result, we verified through experiments that the proposed method works in real time.

Special Issue for Biomedical Ultrasound: Towards Further Advances in Fundamentals and Applications by Comprehensive Reviews

  • Kim, Yong-Tae
    • The Journal of the Acoustical Society of Korea
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    • v.29 no.3E
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    • pp.107-110
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    • 2010
  • In this paper, the rationale and contents of the special issue of the Journal of the Acoustical Society of Korea regarding comprehensive reviews on past, present and future of biomedical ultrasound are described. Brief descriptions of invited articles are given, and efforts by all contributing authors are gratefully acknowledged.

체지방량 추정을 위한 초음파피지후계와 Caliper의 비교 (Comparison of Caliper and Ultrasound Measurement for the Estimation of Body Fat)

  • 정진욱
    • Journal of Nutrition and Health
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    • v.28 no.4
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    • pp.282-290
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    • 1995
  • Subcutaneous fat thickness of 74 young male was measured at six sites(biceps, triceps, subscapula, suprailiac, abdomen, thigh). The present study compared caliper with ultrasound measurements for the estimation of body fat. Caliper measurements subcutaneous at six sites had higher coefficient variation than did the ultrasound measures. Caliper measurements subcutaneous at six sites had higher ratio (caliper/ultrasound) than did the ultrasound measures. Compared to other body sites, the correlations between caliper and ultrasound measurements were high for the subscapula(r=0.7327), abdomen(r=0.7355) and thigh (r=0.7207) sites. the correlations between caliper and ultrasound measurements were high for the suprailiac(r=0.6616) site by lean group. the correlations between caliper and ultrasound measurements were high for the abdomen(r=0.7636) site by normal group. The correlations between caliper and ultrasound measurements were high for the subscapula (r=0.8959) and abdomen(r=0.8237) sites by obese group. Ultrasound measurement of biceps(r=-0.4459), abdomen9r=-0.4469), thigh(r=-0.4348) had the highest correlation with body density. Caliper measurement of triceps(r=-0.4017), subscapula(r=-0.4454), abdomen(r=-0.4293) had the highest correlation with body density. Ultasound measurements subcutaneous fat at lean group, obese group had higher coefficients of correlation with body density than did the caliper measurement. Caliper measurements subcutaneous fat at normal group had higher coefficients of correlation with body density than did the ultrasound measures. Ultrasound showed to be superior to the caliper technique in measuring subcutaneous fat of obese persons.

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초음파 탐촉자의 위생관리에 관한 연구 (A Study on the Hygiene Management of Ultrasound Probe)

  • 하명진;김정구
    • 대한방사선기술학회지:방사선기술과학
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    • v.43 no.2
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    • pp.87-96
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    • 2020
  • This study examined the hygiene management of ultrasound probes by examining the cleaning tools for hygiene management of ultrasound probes, the presence or absence of wearing glove as a personal protective equipment, and the awareness of ultrasound probe hygiene. Parts 154 questionnaire about people working in the ultrasound room were surveyed and analyzed. The single gel removal tool of the ultrasound probe was most frequently used with a 48.7% cotton towel, and for double gel removal tools, the first gel removal tool was 42.4% cotton towel and the second gel removal tool was used with 57.6% wet tissue. Antimicrobial wipes were the most commonly used drug and instrument used in ultrasound hygiene management at 58.4%. According to the survey of the presence or absence of wearing glove during ultrasound examination, 46.8% were found to be unworn. When examining the intracavity ultrasound, 30.9% of those who do not wear glove and 61.0% of hygiene awareness of ultrasound probes are 'normal'. According to age, ultrasound probe gel removal tool was not significant difference(p>0.05). According to the working organization and the working department, it was significant difference to wearing gloves during ultrasound examination(p<0.05). Therefore, in order to properly sanitize the ultrasound probe, it is considered that a guideline for hygiene management of the ultrasound probe that fits the situation in Korea is necessary, and it is considered that thorough hygiene management training for inspector is necessary for efficient hygiene management of the ultrasound probe.

산전 초음파검사에 대한 산모의 인식도 (Perception of Prenatal Ultrasound by Pregnant Women)

  • 김문정;유승흠;이영호
    • 한국병원경영학회지
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    • v.6 no.1
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    • pp.41-61
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    • 2001
  • The purpose of this study was to assess pregnant women's knowledge of, attitude to, and satisfaction with prenatal ultrasound and to determine the factors that influence their perception. A self-administered questionnaire survey was completed by two hundred eighty five pregnant women who visited the obstetric departments of three hospitals located in Seoul from October 17, 2000 to October 28, 2000. The major results are as follows. 1. Overall, the respondents did not fully understand the purpose of prenatal ultrasound. 92.2% of respondents stated that the main purpose of prenatal ultrasound was to check the fetus' age, growth and development but only 44.5% of respondents were aware of the fact that chromosomal abnormalities cannot be diagnosed only by prenatal ultrasound. The majority of respondents were aware of the diagnostic limitations of ultrasound. 2. While the majority of respondents were aware of the importance of pre-examination information, only 31.8% of respondents received such information from their health care providers. 3. Regarding the examination quality, 80.3% of respondents were satisfied with the competency of the examination. But more than 50% of respondents stated the cost and waiting time were not acceptable. 4. The knowledge of, attitude to, and satisfaction with prenatal ultrasound showed statistically significant differences according to the characteristics of each hospital. 5. From multiple regression analysis, the major components for knowledge of prenatal ultrasound were characteristics of hospitals, religion, income and gestational age. The major components for attitude toward prenatal ultrasound were characteristics of hospitals, religion and gestational age. The major components for satisfaction with prenatal ultrasound were characteristics of hospitals, income and drinking during the pregnancy. In conclusion, the respondents' perception of prenatal ultrasound is considerably low. More effective educational material or programs with prenatal ultrasound information should be provided to pregnant women prior to prenatal ultrasound examination. New strategies such as process reengineering are recommendable to increase the satisfaction with prenatal ultrasound.

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INDUSTRIAL MATHEMATICS IN ULTRASOUND IMAGING

  • JANG, JAESEONG;AHN, CHI YOUNG
    • Journal of the Korean Society for Industrial and Applied Mathematics
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    • v.20 no.3
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    • pp.175-202
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    • 2016
  • Ultrasound imaging is a widely used tool for visualizing human body's internal organs and quantifying clinical parameters. Due to its advantages such as safety, non-invasiveness, portability, low cost and real-time 2D/3D imaging, diagnostic ultrasound industry has steadily grown. Since the technology advancements such as digital beam-forming, Doppler ultrasound, real-time 3D imaging and automated diagnosis techniques, there are still a lot of demands for image quality improvement, faster and accurate imaging, 3D color Doppler imaging and advanced functional imaging modes. In order to satisfy those demands, mathematics should be used properly and effectively in ultrasound imaging. Mathematics has been used commonly as mathematical modelling, numerical solutions and visualization, combined with science and engineering. In this article, we describe a brief history of ultrasound imaging, its basic principle, its applications in obstetrics/gynecology, cardiology and radiology, domestic-industrial products, contributions of mathematics and challenging issues in ultrasound imaging.

초음파실 표면의 세균 오염평가 (Bacterial Contamination of Surfaces in an Ultrasound Room)

  • 김희정;최유진;이창래
    • 대한방사선기술학회지:방사선기술과학
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    • v.44 no.3
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    • pp.231-237
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    • 2021
  • The ongoing coronavirus disease 2019 (COVID-19) pandemic has highlighted the importance of hospital hygiene and infection control in hospital settings. To raise hygiene awareness among ultrasound technicians, we evaluated the hygiene status of an ultrasound room, in comparison with that of objects used in daily life. Using the swab method, the following surfaces were examined: eight surfaces in the ultrasound room including the ultrasound probes (convex, linear, sector, 3D), ultrasound track ball, ultrasound keyboard, ultrasound gel (sealed and in use) and pillow as well as four surfaces of everyday objects including subway handles, common computer keyboards, common computer mouse, and cell phones. The streak plate technique was used for inoculation into media, which was observed for the formation of bacterial colonies following incubation for 24 h. Six bacterial strains were detected from objects used in the ultrasound room, including methicillin-resistant Staphylococcus aureus. Four strains of bacteria were detected on surfaces of everyday objects. The equipment and accessories used in an ultrasound room can act as vehicles for infecting patients. Establishment of standardized hygiene protocols and periodic training of the staff are recommended to avoid cross-infection.

동결견 환자의 초음파치료 시 신장여부에 따른 관절가동범위 회복과 통증감소 효과 비교 (Comparison of the Effect in ROM Increase and Pain Reduction on Stretching During Ultrasound Treatment in Patients With Frozen Shoulder)

  • 양회송
    • 한국전문물리치료학회지
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    • v.10 no.1
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    • pp.129-137
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    • 2003
  • A single subject experimental design (alternating treatment design) was used to compare the effects of only ultrasound and ultrasound combined with stretching of the joint capsule on the ROM increase and pain reduction in patients with frozen shoulder. Two subjects were included in each group. In the only ultrasound treatment sessions, ultrasound was applied at the pain point of the shoulder joint in supine position. In the ultrasound combined with stretching treatment sessions, ultrasound was applied at the pain point of the shoulder joint positioned in external rotation and abduction in sitting position. Only ultrasound treatment and ultrasound combined with stretching treatment were alternately performed on each patient. Pain and disability was measured by shoulder pain and disability index (SPADI), and range of motion (ROM) was measured by scratch test. The results of this study showed that ultrasound combined with stretching treatment were more effective than only ultrasound treatment in ROM increase and pain reduction. However, disability score was not significantly different.

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Ultrasound Utility for Predicting Biological Behavior of Invasive Ductal Breast Cancers

  • Zhang, Lei;Liu, Yu-Jie;Jiang, Shuang-Quan;Cui, Hao;Li, Zi-Yao;Tian, Jia-Wei
    • Asian Pacific Journal of Cancer Prevention
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    • v.15 no.19
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    • pp.8057-8062
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    • 2014
  • Purpose: The aim of the study was to evaluate the correlation of ultrasound features with breast cancer molecular status. Materials and Methods: A retrospective review was performed of ultrasound findings in 263 patients diagnosed with breast invasive ductal carcinoma for comparison with immunohistochemistric results were obtained from each lesion. Relationships between ultrasound findings and molecular status were investigated by using multiple regression analysis by means of stepwise logistic regression. Differences in ultrasound criteria were assessed among women with different molecular status. Results: ER positivity was associated with small size, lobulate, angular or spiculated margin contours, absence of calcification, posterior tumor shadowing and low elasticity score; PR positivity was associated with small size, lobulate or angular or spiculated margin contours and absence of calcification; HER2 positivity was associated with presence of calcification and absence of any echogenic halo. The calculated models of predicted molecular status were accurate and discriminating with AUCs of 0.78, 0.74, and 0.74, respectively. Conclusions: Breast cnacer ultrasound features show some correlation with the molecular status. These models may help to expand the scope of ultrasound in predicting tumor biology.