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정재홍(Jaehong Jeong),이상현(Sanghyun Lee),박제근(Je-Geun Park) 한국자기학회 2012 韓國磁氣學會誌 Vol.22 No.3
Having a de Broglie wavelength of a few A with its corresponding energies in the range of a few to a few hundreds meV, neutrons are ideally suited for the studies of structure and dynamics in condensed matter research. Neutron scattering has been developed over the past 60 years or so and become a very mature and established experimental technique in the very broad range of material sciences. In this short introductory article, we have explained its working principles and provided few selected examples of application
유방암 환자의 수술 전 액와림프절 전이 여부 평가를 위한 영상의학적 검사의 효용성
김경덕(Kyeong Deok Kim),인정진(Jeong Jin In),장윤희(Yun Hee Jang),김지선(Zisun Kim),국중철(Jung Cheol Kuk),최규성(Kyu Sung Choi),정재홍(Jaehong Jeong),허성모(Sung Mo Hur),정귀애(Gui Ae Jeong),정준철(Jun Chul Chung),조규석(Gyu Seok Ch 대한종양외과학회 2015 Korean Journal of Clinical Oncology Vol.11 No.2
Purpose: The purpose of this retrospective study was to identify the diagnostic performance of positron emission tomography/computed tomography (PET/CT) compared to conventional modalities, such as ultrasonography (US) and contrast-enhanced computed tomography (CT) in detecting axillary lymph node metastasis (ALNM) in patients with breast cancer. Methods: Two hundred thirty-three consecutive patients diagnosed with primary breast cancer who had not been treated with neoadjuvant chemotherapy and had been examined by US, CT, and PET/CT before surgery were included. Sensitivity, specificity, positive predictive value (PPV), and negative predictive value (NPV) of each imaging modality and combinations of modality according to tumor size were obtained, and were compared with the histopathological results of sentinel lymph node biopsy or axillary lymph node dissection. Results: ALNM was confirmed in 32.6% (76/233) of patients. The sensitivity, specificity, PPV, NPV, and accuracy of US for detecting ALNM were 65.8%, 86.6%, 70.4%, 84.0%, and 79.8%, respectively. The sensitivity, specificity, PPV, NPV, and accuracy of CT were 72.4%, 72.6%, 56.1%, 84.4%, and 72.5%, respectively. The sensitivity, specificity, PPV, NPV, and accuracy of PET/CT were 69.7%, 86.0%, 70.7%, 85.4%, and 80.7%, respectively. The combination of US and PET/CT showed the most accurate results with specificity, PPV and accuracy values of 93.6%, 81.5%, and 82.0%, respectively. Conclusion: The diagnostic performance of PET/CT was comparable to that of US and CT. Combination of US and PET/CT could be a reliable strategy for determining preoperative ALNM in patients with operable breast cancer.