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Gowoon Yang,Jee Suk Chang,Kyung Hwan Shin,Jin Ho Kim,Won Park,Haeyoung Kim,Kyubo Kim,Ik Jae Lee,Won Sup Yoon,Jihye Cha,Kyu-Chan Lee,Jin Hee Kim,Jin Hwa Choi,Sung-Ja Ahn,Boram Ha,Sun Young Lee,Dong Soo 대한방사선종양학회 2020 Radiation Oncology Journal Vol.38 No.4
Purpose: The details of breast reconstruction and radiation therapy (RT) vary between institutions; therefore, we sought to investigate the practice patterns of radiation oncologists who specialize in breast cancer. Materials and Methods: We identified the practice patterns and inter-hospital variations from a multi-center cohort of women with breast cancer who underwent post-mastectomy RT (PMRT) to the reconstructed breast at 16 institutions between 2015 and 2016. The institutions were requested to contour the target volume and produce RT plans for one representative case with five different clinical scenarios and answer questionnaires which elicited infrastructural information. We assessed the inter-institutional variations in RT in terms of the target, normal organ delineation, and dose-volume histograms. Results: Three hundred fourteen patients were included; 99% of them underwent immediate reconstruction. The most irradiated material was tissue expander (36.9%) followed by transverse rectus abdominis musculocutaneous flap (23.9%) and silicone implant (12.1%). In prosthetic-based reconstruction with tissue expander, most patients received PMRT following partial deflation. Conventional fractionation and hypofractionation RT were used in 66.6% and 33.4% patients, respectively (commonest: 40.05 Gy in 15 fractions [17.5%]). Furthermore, 15.6% of the patients received boost RT and 53.5% were treated with bolus. Overall, 15 physicians responded to the questionnaires and six submitted their contours and RT plans. There was a significant variability in target delineations and RT plans between physicians, and between clinical scenarios. Conclusion: Adjuvant RT following post-mastectomy reconstruction has become a common practice in Korea. The details vary significantly between institutions, which highlights an urgent need for standard protocol in this clinical setting.
최고운(Gowoon Choi),안우석(Wooseok An),양준영(Junyoung Yang),김동호(Dongho Kim) 한국정보기술학회 2021 Proceedings of KIIT Conference Vol.2021 No.6
최근 COVID-19로 인하여 실내 혼잡 시설을 기피하고, 야외 시설을 선호함에 따라 한강공원에 대한 시민들의 수요가 늘어나고 있다. 본 연구는 On-Board 상에서 일정 시간마다 YOLO를 통하여 한강공원의 사람 및 텐트 객체를 인식 및 계수하여 실시간 혼잡도를 시각화하여 제공하는 시스템을 개발한다. 이를 통해 한강공원을 이용하는 시민들의 쏠림 현상을 방지하고, CX(Customer Experience)를 향상시키는 것을 목표로 한다. Recently, due to COVID-19, citizens" demand for using Hangang Park has been increasing as they avoid indoor congestion facilities and prefer outdoor facilities. This study develops a system that provides real-time congestion by detecting and counting people and tent objects in Hangang Park through YOLO on the board. As a result, it aims to prevent the concentration of citizens using Hangang Park and improve Customer Experience (CX).
Radiotherapy for initial clinically positive internal mammary nodes in breast cancer
Kim, Jina,Chang, Jee Suk,Choi, Seo Hee,Kim, Yong Bae,Keum, Ki Chang,Suh, Chang-Ok,Yang, Gowoon,Cho, Yeona,Kim, Jun Won,Lee, Ik Jae The Korean Society for Radiation Oncology 2019 Radiation Oncology Journal Vol.37 No.2
Purpose: Internal mammary lymph node (IMN) involvement is associated with poor prognosis in breast cancer. This study investigated the treatment outcomes of initial clinically IMN-positive breast cancer patients who received adjuvant radiotherapy (RT), including IMN irradiation, following primary breast surgery. Materials and Methods: We retrospectively reviewed data of 95 breast cancer patients with clinically detected IMNs at diagnosis treated with surgery and RT between June 2009 and December 2015. Patients received adjuvant RT to the whole breast/chest wall and regional lymph node (axillary, internal mammary, and supraclavicular) areas. Twelve patients received an additional boost to the IMN area. Results: The median follow-up was 43.2 months (range, 4.5 to 100.5 months). Among 77 patients who received neoadjuvant chemotherapy, 52 (67.5%) showed IMN normalization and 19 (24.6%) showed a partial response to IMN. There were 3 and 24 cases of IMN failure and any recurrence, respectively. The 5-year IMN failure-free survival, disease-free survival (DFS), and overall survival (OS) were 96%, 70%, and 84%, respectively. IMN failure-free survival was significantly affected by resection margin status (97.7% if negative, 87.5% for close or positive margins; p = 0.009). All three patients with IMN failure had initial IMN size ≥1 cm and did not receive IMN boost irradiation. The median age of the three patients was 31 years, and all had hormone receptor-negative tumors. Conclusion: RT provides excellent IMN control without the support of IMN surgery. Intensity-modulated radiotherapy, including IMN boost for breast cancer patients, is a safe and effective technique for regional lymph node irradiation.
Radiotherapy for initial clinically positive internal mammary nodes in breast cancer
Jina Kim,Jee Suk Chang,Seo Hee Choi,Yong Bae Kim,Ki Chang Keum,Chang-Ok Suh,Gowoon Yang,Yeona Cho,Jun Won Kim,Ik Jae Lee 대한방사선종양학회 2019 Radiation Oncology Journal Vol.37 No.2
Purpose: Internal mammary lymph node (IMN) involvement is associated with poor prognosis in breast cancer. This study investigated the treatment outcomes of initial clinically IMN-positive breast cancer patients who received adjuvant radiotherapy (RT), including IMN irradiation, following primary breast surgery. Materials and Methods: We retrospectively reviewed data of 95 breast cancer patients with clinically detected IMNs at diagnosis treated with surgery and RT between June 2009 and December 2015. Patients received adjuvant RT to the whole breast/ chest wall and regional lymph node (axillary, internal mammary, and supraclavicular) areas. Twelve patients received an additional boost to the IMN area. Results: The median follow-up was 43.2 months (range, 4.5 to 100.5 months). Among 77 patients who received neoadjuvant chemotherapy, 52 (67.5%) showed IMN normalization and 19 (24.6%) showed a partial response to IMN. There were 3 and 24 cases of IMN failure and any recurrence, respectively. The 5-year IMN failure-free survival, disease-free survival (DFS), and overall survival (OS) were 96%, 70%, and 84%, respectively. IMN failure-free survival was significantly affected by resection margin status (97.7% if negative, 87.5% for close or positive margins; p = 0.009). All three patients with IMN failure had initial IMN size ≥1 cm and did not receive IMN boost irradiation. The median age of the three patients was 31 years, and all had hormone receptor-negative tumors. Conclusion: RT provides excellent IMN control without the support of IMN surgery. Intensity-modulated radiotherapy, including IMN boost for breast cancer patients, is a safe and effective technique for regional lymph node irradiation.