대칭적 에코 배치 및 필터링을 통한 Fast Spin Echo 영상에서의 Gibb's 현상 개선

안창범,김치영,오창현,신진교 대한자기공명의과학회 1997 Investigative Magnetic Resonance Imaging Vol.1 No.1

Fast spin echo imaging utilizes multiple spin echoes to encode multiple k-space lines instead of multiple $T_2-weighted$ images. As results, intensities in k-space data are varying according to T2 decay, which generates Gibb's artifact in the reconstructed image. The echo time for e encoding dc block determines contrast, as is specified by the effective echo time, however, all location of other echoes to different k-space frequency blocks in fast spin echo imaging is not f fully investigated. In this study, symmetric arrangement of multiple echoes in k-space is investigated to reduce Gibb's artifact. Design of filters based on the measurement of multiple e echo intensities is also proposed in two stage manner, i.e., equalization and filtering. From s simulation and experiment, it was observed that Gibb's phenomena were substantially reduced b by the proposed methods.

수산 부산물의 유효이용

안창범 전남대학교 수산과학연구소 2003 수산과학연구소논문집 Vol.12 No.-

The major components of processing discards of seafoods incIude edible portions such as tongue, cheeks, stomach and liver from fish, proteins from residual flesh, fish skin, chitinous materials, carotenoid pigments, flavorants, gut enzymes, and anti-freeze proteins from blood of cold-temperature fish. The potential utilization of each of these ingredients in a variety of applications has been the focus of attention in recent years. Preparation of protein concentrates and hydrolysates as well as surimi from residual flesh remaining on fish frames after filleting has received increasing attention in recent years. MeanwhiIe, isolation of anti-freeze proteins from blood plasma of fish in cold waters has been important both for production of transgenic fish and for extending the shelf-life of human organs intended for transplant purposes. Cold-temperature 얹zymes from gastrointestinal tracts of fish may serve as processing aids in the food industry. In addition, chitosan derivatives have been used for a v값iety of applications. There are over 200 current and potential applications of chitinous materials in biotechnology, food processing, agriculture, pharmacy, medicine and natural environment preseπation. Furthermore, utilization of carotenoid and carotenoprotein extracts, prepared from shellfish processing discards, in aquaculture feed formulations intended for pigmentation of salmonids has been reported. Possible recoveη of flavorants from shellfish processing discards or from cook water has been a야empted. In addition, marine lipids, prepared from fish liver or as a by-product in fish meal production, have been used as a source of omega-3 fatty acids for pharmaceutical and food applications.

고속 영상 알고리즘

안창범 대한자기공명의과학회 2001 Investigative Magnetic Resonance Imaging Vol.5 No.2

『 동경대전 』 의 역사적 연구

안창범 동학학회 2001 동학학보 Vol.2 No.-

생체신호처리 연구의 현황과 전망

안창범,우응제,윤영로,이경중 대한의용생체공학회 1999 의공학회지 Vol.20 No.2

용성산인(龍城山人) 이창원(李昌遠)의 사상학설(四象學說)과 체질침(體質鍼)에 대한 고찰(考察)

안창범,윤현민,허재영,권혜연,Ahn, Chang-beohm,Youn, Byuon-Min,Hea, Jae-young,Kwon, Hae-Yon 대한침구의학회 2002 대한침구의학회지 Vol.19 No.1

Objective : This study was carried out to review Chang-Won Lee's theory of Sasangand acupuncture of constitution. Methods : We have investigated Chang-Won Lee's unknown literature "Medicine of sassang "(四象醫學). Results : Constitutional acupuncture is based on the diversity of human being and medically developed the response variation to disease and acupuncture. The diversity is due to the Organ's Congenital Formation Variation based on human nature and it is categorized as four from physiology, pathology, symptoms, to therapy. Chang-Won Lee's constitutional acupuncture discriminated constitution of comparison palpations of right and left both sides. He insisted that constitution only four type(Sasang), not exist man of To-Hyoung (土形人) in "young -chu"(靈樞) and his constitutional acupuncture all used Jung-kyuck (reinforcement acupuncture method) and Seong-kyuck(reducing acupuncture method) of Sa-am(舍岩)

신경망을 사용한 뇌파 및 Artifact 자동 분류

안창범,이택용,이성훈,Ahn, Chang-Beom,Lee, Taek-Yong,Lee, Sung-Hoon 대한의용생체공학회 1995 의공학회지 Vol.16 No.2

The Electroencephalogram (EEG) and evoked potential (EP) t;ave widely been used for study of brain functions. The EEG and EP signals acquired from multi-channel electrodes placed on the head surface are often interfered by other relatively large physiological signals such as electromyogram (EMG) or electroculogram (EOG). Since these artifact-affected EEG signals degrade EEG mapping, the removal of the artifact-affected EEGs is one of the key elements in neuro-functional mapping. Conventionally this task has been carried out by human experts spending lots of examination time. In this paper a neural-network based classification is proposed to replace or to reduce human expert's efforts and time. From experiments, the neural-network based classification performs as good as human experts : variation of decisions between the neural network and human expert appears even smaller than that between human experts.

초고속 자기 공명 영상 기법 - Echo Planar 영상 및 Spiral Scan 영상

안창범 대한자기공명의과학회 1999 Investigative Magnetic Resonance Imaging Vol.3 No.1

Echo Planar Imaging (EPI) Spiral Scan 영상을 초고속 자기공명영상 기법으로서 전체 k-space의 데이터를 한번 scan에 다 받을 수 있기 때문에 데이터 측정시간을 100ms 이내로 단축시킬 수 있다. 이러한 초고속 영상 기법은 최근 활발히 연구되고 있는 뇌기능 영상과 관련하여 중요도가 더욱 커지고 있다. EPI는 직각좌표계에서 데이터를 받기 때문에 재구성은 비교적 쉬우나 eddy current를 많이 야기시키는 단점을 가지고 있다. 반면에 Spiral Scan 영상은 먼저 데이터를 원 또는 직각좌표계로 interpolation을 한 후 재구성하여야 하는 단점이 있으나, 상대적으로 eddy current가 작고, 방향과 무관하게 균일한 point spread function을 가지며, 혈류와 관련한 위상이 스스로 rephasing 되어 심장 영상 등에 유리한 장점이 있다.

東洋思想 發生과 우리나라의 白頭山

안창범 제주대학교 사범대학 1999 백록논총 Vol.1 No.-

This study is revealed the fact that Hanwoong Chungwang, who has been treated as a mythical being until now. established Shinsun Do and combined Buddhism, Confucianism, and combined Buddhism, Confucianism, and Taoism into one religion in Shinsi of Mt. Paekdu in the 3rd of October(the lunar calender), 5985 years ago. even though it isn't well known in the academic world. Generally the eastern world has traditionally thought of Buddhism as created by Buddha, Confucianism by Confucius and Mencius, and Taoism by Lao-tzu and Chuangtzu, Buddhism, Confucianism and Taoism are originated in or inseparably related with Mt. Sul, Mt, Gonryun and Mt, Samshin. However, Mt,Sul was vaguely supposed to be one of the Himalayan Mountains in northern India,Mt.Gonryun to be mountain somewhere in China, and Mt. Samshin to be Mt. Kumkang, Mt, Chiri and Mt,Halla in Korea. We don't exactly know where these mountains are located. In this study. first, I have examined, arranged the essential materials of Mt. Sul. and then substituted the essential ones of Mt. Paekdu for Mt. Sul. Therefore, it is assumed that Mt, Sul could be another name of Mt. Paekdu,and Mt, Sul and Mt, Paekdu be the same mountains. Besides. there was no mountain named Mt. Sul where Buddha practiced asceticism in the Himalaya Mountains of Northern India. and its geographical condition was also different. Second, the Chinese summed up the essential materials of Mt. Gonryun.the cradle of Confucianism, and the gods of mountain, and then substituted the essential ones of Mt. Paekdu for MT. Gonryun. Therefore Mt. Paekdu and Mt, Gonryun are the same mountains, and there was no mountains named Mt.Gonryun in China. Finally, I arranged the related materials of Mt Samshin that the Chinese have admired as a celebrated mountain on earth and believed as the immortal place of Taoists, and substituted the related materials of Paekdu mountain for Mt. Sanmshin. And the result is that Mt. Samshin coincides with Mt. Paekdu. Frequently some people have thought that Mt. Samshin is named Mt. Kumkang. Mt. Chiri and Mt. Halla in Korea, but the total names of these mountains are revealed to be Mt. Samshin,and each name is not Mt. Samshin but Mt. Sun. Consequently, Mt. Sul, Mt. Gonryun, and MT. Samshin are the same mountain named Mt. Paekdu where Hanwoong Chunhwang preached Shinsun Do. If it is true. these religions must be originated from Mt.Paekdu in Korea. Therefore, our Korean people are creators of oriental culture, and Mt.Paekdu in Korea is the birthplace of oriental culture.

神仙道와 불교의 사상 比較硏究

안창범 중앙승가대학교 1993 僧伽 Vol.10 No.-