• Asian Pacific Journal of Cancer Prevention
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• v.17 no.10
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• pp.4689-4692
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• 2016

Purpose: To study the clinical application value of ultrasound guided thyroid fine needle aspiration biopsy and thinprep cytology testing in diagnosis of thyroid disease. Methods: A total of 78 patients with thyroid nodules were enrolled, 34 males and 44 females, aged 33-64 years old with mean age of 47.6 years. All underwent thyroid module fine needle puncture after surgery to assess cell pathology and histopathological features. Results: Sufficient specimens were obtained from all of 78 patients, the cytological results of 73 cases (93.6 %) being consistent with pathological results. While 20 cases (25.6 %) were malignant tumors, 44 (56.4 %) were benign and 9 (11.5 %) were non-tumor lesions. The sensitivity of benign and malignant thyroid nodule by thyroid fine needle puncture was 90.9 %, specificity was 98.1 % and the positive predictive value was 96.3 %. Conclusions: It is demonstrated that ultrasound-guided thyroid fine needle aspiration biopsy and thinprep cytology testing have diagnostic value in clinical application for thyroid disease,showing good diagnostic coincidence rates with histopathological examination. They can thus be regarded as safe and effective for preoperative diagnosis and providing an appropriate basis for selection of surgery.

• Journal of the Korean Society of Radiology
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• v.16 no.3
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• pp.265-271
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• 2022

This study retrospectively analyzed the test results of 441 patients who visited Hospital I in Busan from October 2021 to December 2021 and conducted both mid-term ultrasound and fibroscan tests. The purpose of the study was to investigate the usefulness of fibroscan in inter-fat evaluation by conducting correlation analysis and chi-squared test of inter-fat evaluation using liver ultrasound and fibroscan. As a result of analyzing the correlation between the fatty liver reading result of abdominal ultrasound and Fibroscan UAP, the correlation was found to be r=0.600 and p=0.000. In the inter-provincial evaluation, Fibroscan showed high validity in predicting objective results using inter-provincial values.

• The Journal of Korean Orthopaedic Ultrasound Society
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• v.7 no.2
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• pp.132-137
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• 2014

We can test for small structures located at the surface layer as high resolution ultrasonic techniques and small probes were developed. Accordingly ultrasound became a useful tool in the diagnosis and treatment of wrist diseases. It is important to understand the anatomical structures and apply clinical features as well as these technical aspects when using ultrasound. The purpose of this article is to evaluate the usefulness and approach of ultrasound about typical diseases according to the area of the wrist pain.

• Asian Pacific Journal of Cancer Prevention
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• v.15 no.6
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• pp.2929-2932
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• 2014

Purpose: To evaluate the diagnostic performances of risk of malignancy index (RMI), CA-125 and ultrasound score in differentiating between benign and borderline or malignant ovarian tumors and find the best diagnostic test for referral of suspected malignant ovarian cases to gynaecologic oncologists. Materials and Methods: This prospective study covered 467 women with pelvic tumors scheduled for surgery at our hospital between July 2011 and July 2013. The RMI was obtained from ultrasound score, CA125 and menopausal status. The diagnostic values of each parameter and the RMI were determined and compared using Statistical Packages for Social Sciences Version 14.0.1. Results: In our study, 61% of ovarian tumors were malignant in the post-menopausal age group. RMI with a cut-off 150 had sensitivity of 84% and specificity of 97% in detecting ovarian cancer. CA-125>30 had a sensitivity of 84% and a specificity of 83%. An ultrasound score more than 2 had a sensitivity of 96% and specificity of 81%. RMI had the least false malignant cases thus avoiding unnecessary laparotomies. Ultrasound when used individually had the best sensitivity but poor specificity. Conclusions: Our study has demonstrated the RMI to be an easy, simple and applicable method in the primary evaluation of patients with pelvic masses. It can be used to refer suspected malignant patients to be operated by a gynaecologic oncologist. Other models of preoperative evaluation should be developed to improve the detection of early stage invasive, borderline and non-epithelial ovarian cancers.

• Physical Therapy Rehabilitation Science
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• v.11 no.3
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• pp.344-349
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• 2022

Objective: The purpose of the present study was to determine whether sit to stand training combined with ultrasound improves the spasticity, muscle strength and gait speed in stroke patients Design: Randomized controlled study Methods: The current study included 40 stroke patients, who were randomly divided into two groups: the sit to stand training with ultrasound (USTS) group (n=20) and the sit to stand training (STS) group (n=20). All the participants underwent 30 sessions of STS training (thirty minutes, five days per week for six weeks). Additionally, the USTS group received ultrasound therapy. The present study evaluated the spasticity of ankle plantar-flexors by the composite spasticity score. The muscle strength and gait speed were evaluated using the handheld dynamometer and the 10-meter walk test, respectively. Results: The USTS group and the STS group showed significant improvements in spasticity, muscle strength and gait speed after the intervention (p<0.05). Significant improvement in the spasticity, muscle strength, and gait speed were observed in the USTS group compared to the control group (p < 0.05). Conclusions: The results of the current study imply that sit to stand training combined with ultrasound is a beneficial and effective therapeutic modality that can be employed to improve the spasticity, muscle strength and gait speed in stroke patients.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2021.10a
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• pp.655-657
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• 2021

It is challenging to find breast ultrasound image training dataset to develop an accurate machine learning model due to various regulations, personal information issues, and expensiveness of acquiring the images. However, studies targeting transfer learning for ultrasound breast cancer images classification have not been able to achieve high performance compared to radiologists. Here, we propose an improved transfer learning model for ultrasound breast cancer classification using publicly available dataset. We argue that with a proper combination of ImageNet pre-trained model and optimizer, a better performing model for ultrasound breast cancer image classification can be achieved. The proposed model provided a preliminary test accuracy of 99.5%. With more experiments involving various hyperparameters, the model is expected to achieve higher performance when subjected to new instances.

• Korean Journal of Radiology
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• v.20 no.1
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• pp.166-170
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• 2019

Objective: To establish a cost-effective and easily available phantom for training residents in ultrasound-guided fine needle thyroid nodule targeting punctures. Materials and Methods: Tofu, drinking straws filled with coupling gel, a urine tube, and 21-gauge needles were used to generate a phantom thyroid with nodules for training. Twelve radiology residents were involved in the study. The puncture success rates were recorded and compared before and after phantom training using the Wilcoxon signed-rank test. Results: On ultrasonography, tofu mimicked the texture of the thyroid. Drinking straws filled with coupling gel mimicked vessels. The urine tube filled with air mimicked the trachea, and 21-gauge needles mimicked small nodules in the transverse section. The entire phantom was similar to the structure of the thyroid and surrounding tissues. The puncture success rates of radiology residents were significantly increased from 34.4 ± 14.2% to 66.7 ± 19.5% after training (p = 0.003). The phantom was constructed in approximately 10 minutes and materials cost less than CNY 10 (approximately $ 1.5) at a local store. Conclusion: The tofu model was cost-effective, easily attainable, and effective for training residents in ultrasound-guided fine needle thyroid nodule targeting punctures in vitro.

• Journal of Biosystems Engineering
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• v.31 no.6 s.119
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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.

• Journal of Acupuncture Research
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• v.33 no.2
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• pp.97-108
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• 2016

Objectives : This study was performed to investigate the analgesic effect of Styrax japonica pharmacopuncture on formalin induced pain in rats and to figure out efficient extraction method. Methods : The subjects were divided into 5 groups ; normal group(treated with normal saline at KI03, and injected normal saline at right hindpaw after 35 minutes), control group(treated with normal saline at KI03, and injected with formalin at right hindpaw after 35 minutes), water group(treated by hot water extraction pharmacopuncture at KI03, and injected with formalin at right hindpaw after 35 minutes), ethanol group(treated with ethanol extraction pharmacopuncture at KI03, and injected with formalin at right hindpaw after 35 minutes), and ultrasound group(treated with ultrasound extraction pharmacacupuncture and injected with fromalin formalin at right hindpaw after 35 minutes). We conducted a formalin test with ultrasonic vocalization( USV), and after the test checked for substance P, Aspartate aminotransferase(AST), and Alanine aminotransferase(ALT) concentration in the blood for each of the groups. Results : There was a significant analgesic effect of Styrax japonica pharmacopuncture in the early phase of the formalin test, and pharmacopuncture made with an ultrasound extracting method was observed to have a better analgesic effect than other extracting methods in early phases. The substance P concentration decreased significantly in the Styrax japonica pharmacopuncture treated group and no difference was found in the AST and ALT concentration of each group. Conclusion : These results demonstrated that Styrax japonica pharmacopuncture had analgesic effects in noxious nociceptors stimulation. Also pharmacopuncture made with an ultrasound extracting method had a better analgesic effect than others.

• Journal of the Korean Society for Nondestructive Testing
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• v.23 no.4
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• pp.349-355
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• 2003

Material degradation due to corrosion fatigue was evaluated nondestructively using backward radiated Rayleigh surface wave. h corrosion fatigue test was carried out for the specimens made of thermo-mechanically controlled process steel in 3.5wt.% NaCl solution at $25^{\circ}C$. The backward radiation profile, which is the amplitude variation of backward radiated ultrasound according to the incident angle, of the specimens were measured in water at room temperature after the corrosion fatigue test. The velocity of Rayleigh surface wave, determined from the incident angle at which the profile of the backward radiated ultrasound became maximum, decreased for the specimen that had the large number of cycles to failure in the corrosion fatigue test. This fact implies that the corrosion degradation occurred at specimen surface in this specific test is dominantly dependant on the me exposed to corrosion environment. The result observed in the present work demonstrates the high potential of backward radiated Rayleigh surface wave as a tool for nondestructive evaluation of corrosion degradation of aged materials.