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탄성 영상법 개발을 위한 유연성 높은 초음파 시스템의 구현
김동인,이수열,조민형,Kim, D.I.,Lee, S.Y.,Cho, M.H. 대한의용생체공학회 2012 의공학회지 Vol.33 No.1
Recently, several ultrasound imaging techniques for tissue characterization have been developed. Among them, ultrasound elastography is regarded as the most promising modality and has been rapidly developed. One of ultrasound elastography techniques is shear modulus imaging. Normal and cancerous tissues show big difference of shear moduli and they have good image contrast. However shear wave elastography requires more complicated hardware and more computations for image reconstruction algorithm. Therefore new efficient techniques are being developed. In this paper, we have developed a very flexible ultrasound system for elastography experiments. The developed system has capabilities to acquire ultrasound RF data of all channels and generate arbitrary ultrasound pulse sequences. It has a huge amount of memories for RF data acquisition and a simple and flexible pulse generator. We have verified the performance of the system showing conventional B-mode images and preliminary results of elastography. The developed system will be used to verify our own reconstruction algorithm and to develop more efficient elastography techniques.
김 임,황익근,김동인 大韓神經精神醫學會 1993 신경정신의학 Vol.32 No.3
The purpose of this study was to compare liters of cold agglutinins in schizophrenic patients with those in normal healthy subjects. 67 schizophrenic patients and 61 healthy control subjects were included in the study. Of 67 schizophrenic patients, 44 patients had been treated with antipsychotic drugs for at least 6 months before the testing, and 21 patients had been drug free for at least 1 year before the testing. The results of the study were as follows : 1) More schizophrenic patients showed significant positive test results than control subjects did. There was a ststistically significant difference between schizophrenic patients and control subjects in positive cold agglutinin test(p<.001). 2) There was a statistically significant difference in positive test results between drug treated group and drug free group(p<.001). 3) The titer of the schizophrenic patients who had positive cold agglutinin tests showed relatively high frequency at above 1 : 4, but the titer of the control subjects who had positive cold agglutinin tests showed relatively high frequency at 1 : 2. 4) There was no significant difference in sex between subjects with positive cold agglutinin test results and those with negative results(p>.05). In conclusion, the findings suggest that positive cold agglutinin tilers are significantly associated with schizophrenia.
김동인,김병조,박유경 大韓神經精神醫學會 2001 신경정신의학 Vol.40 No.3
연구목적 : 본 연구의 목적은 알코올 의존이 없는군과 입원한 알코올 의존군 사이의 인격장애의 유벼율을 알아보고, 여러가지의 축Ⅱ 장애의 범위와 중복을 알아보고자 하였다. 방 법 : 대상은 일반군에서 알코올 의존이 없는 87명과 정신병원에 입원된 알코올 의존환자 94명이었다. 알코올 의존은 DSM-IV에 의거하여 미시건 알코올 의존 선별검사로 진단하였고, 정상군과 환자군 모두 PDQ-4+를 시행하였다. 결 과 : 정상군은 52.3%가 적어도 1개 이상의 인격장애를 가지고 있었으며 한 사람당 평균 1.23개였다. 알코올 의존군은 88.3%가 적어도 1개 이상의 인격장애를 가지고 있었으며 한 환자당 평균 4.26개였다. 결 론 : 본 연구에서는 단일의 "알코올성 인격장애"는 없었다. Objectives : The purpose of this study was to examine the prevalence of personality disorders among non-alcoholics and hospitalized alcoholics and the extent and nature of the overlap between different axis Ⅱ disorders. Methods : Subjects were 87 non-alcoholics in the general population group and 94 alcoholics admitted to psychiatric hospital. Alcohol dependence was diagnosed according to DSM-IV by the MAST, and general group and patients were assessed with the PDQ-4+. Results : In the general population group, 52.3% of non-alcoholics had at least one personality disorder and the average number of personality disorders was 1.23 per person. In the alcohol group, 88.3% of the patients had at least on personality disorder and the average number of personality disorders was .426 per patient. Conclusion : In our study, there is no single "alcoholic personality" emerged.