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RISS 인기검색어
- 검색키워드
- 저자 : Lee Chau Hung (검색결과 3 건)
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Multiparametric MRI in Active Surveillance of Prostate Cancer: An Overview and a Practical Approach
Lee Chau Hung,Tan Teck Wei,Tan Cher Heng 대한영상의학회 2021 Korean Journal of Radiology Vol.22 No.7
MRI has become important for the detection of prostate cancer. MRI-guided biopsy is superior to conventional systematic biopsy in patients suspected with prostate cancer. MRI is also increasingly used for monitoring patients with low-risk prostate cancer during active surveillance. It improves patient selection for active surveillance at diagnosis, although its role during follow-up is unclear. We aim to review existing evidence and propose a practical approach for incorporating MRI into active surveillance protocols.
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Condition Based Monitoring in Railway
Lee, K.H. Kim Hung,Chau, Dennis Kong Wan 대한전기학회 2012 The Journal of International Council on Electrical Vol.2 No.1
This paper presents the railway applications of Condition Based Monitoring (CBM), which have been developed and implemented in the metro system of Hong Kong since 1989. In this paper, the limitations of traditional preventive and reactive maintenance approach in railway operations environment will be explained. CBM has been a proven technology to effectively enhance the RAMS performance of equipment and optimize the maintenance resources, thus reducing the overall life cycle cost. As an example, the technology of Radio Frequency Identification Device (RFID) tag with temperature sensor is used to capture and transmit the main transformer temperature back to maintenance centre via a fixed trackside TCP/IP network. A user-friendly monitoring and analysis software was also developed to provide real-time alarm and trend prediction on transformer temperature. The system is capable of providing early alarm before equipment failure and mitigating incidents which are critical to safety and service performance of the railway.
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Wang Li-Jen,Jinzaki Masahiro,Tan Cher Heng,Oh Young Taik,Shinmoto Hiroshi,Lee Chau Hung,Patel Nayana U.,Chang Silvia D.,Westphalen Antonio C.,Kim Chan Kyo 대한영상의학회 2023 Korean Journal of Radiology Vol.24 No.11
Objective: To elucidate the use of radiological studies, including nuclear medicine, and biopsy for the diagnosis and staging of prostate cancer (PCA) in clinical practice and understand the current status of PCA in Asian countries via an international survey. Materials and Methods: The Asian Prostate Imaging Working Group designed a survey questionnaire with four domains focused on prostate magnetic resonance imaging (MRI), other prostate imaging, prostate biopsy, and PCA backgrounds. The questionnaire was sent to 111 members of professional affiliations in Korea, Japan, Singapore, and Taiwan who were representatives of their working hospitals, and their responses were analyzed. Results: This survey had a response rate of 97.3% (108/111). The rates of using 3T scanners, antispasmodic agents, laxative drugs, and prostate imaging-reporting and data system reporting for prostate MRI were 21.6%−78.9%, 22.2%−84.2%, 2.3%−26.3%, and 59.5%−100%, respectively. Respondents reported using the highest b-values of 800−2000 sec/mm2 and fields of view of 9−30 cm. The prostate MRI examinations per month ranged from 1 to 600, and they were most commonly indicated for biopsy-naïve patients suspected of PCA in Japan and Singapore and staging of proven PCA in Korea and Taiwan. The most commonly used radiotracers for prostate positron emission tomography are prostate-specific membrane antigen in Singapore and fluorodeoxyglucose in three other countries. The most common timing for prostate MRI was before biopsy (29.9%). Prostate-targeted biopsies were performed in 63.8% of hospitals, usually by MRI-ultrasound fusion approach. The most common presentation was localized PCA in all four countries, and it was usually treated with radical prostatectomy. Conclusion: This survey showed the diverse technical details and the availability of imaging and biopsy in the evaluation of PCA. This suggests the need for an educational program for Asian radiologists to promote standardized evidence-based imaging approaches for the diagnosis and staging of PCA.
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