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Superficial Endobronchial Lung Cancer:Radiologic-Pathologic Correlation
NaeJinHan,Koun-SikSong,KyungHeeLee,JoonBeomSeo,JinSeongLee,Tae-HwanLim,GilHyunKang 대한영상의학회 2002 Korean Journal of Radiology Vol.3 No.4
Objective: To analyze the plain chest radiographic and CT findings of superficial endobronchial lung cancer and to correlate these with the findings of histopathology. Materials and Methods: This study involved 19 consecutive patients with pathologically proven lung cancer confined to the bronchial wall. Chest radiographs and CT scans were reviewed for the presence of parenchymal abnormalities, endobronchial nodules, bronchial obstruction, and bronchial wall thickening and stenosis. The CT and histopathologic findings were compared. Results: Sixteen of the 19 patients had abnormal chest radiographic findings, while in 15 (79%), CT revealed bronchial abnormalities: an endobronchial nodule in seven, bronchial obstruction in five, and bronchial wall thickening and stenosis in three. Histopathologically, the lesions appeared as endobronchial nodules in 11 patients, irregular thickening of the bronchial wall in six, elevated mucosa in one, and carcinoma in situ in one. Conclusion: CT helps detect superficial endobronchial lung cancer in 79% of these patients, though there is some disagreement between the CT findings and the pathologic pattern of bronchial lesions. Although nonspecific, findings of bronchial obstruction or bronchial wall thickening and stenosis should not be overlooked, and if clinically necessary, bronchoscopy should be performed.
Soon-AHwang,JoonBeomSeo,Byeong-KyooChoi,Kyung-HyunDo,SungMinKo,Soo-Hyunlee,JinSeongLee,Jae-WooSong,Koun-SikSong,Tae-HwanLim 대한영상의학회 2003 Korean Journal of Radiology Vol.4 No.3
Objective: To compare observer performance using liquid-crystal display (LCD) and cathode-ray tube (CRT) monitors in the interpretation of soft-copy chest radiographs for the detection of small solitary pulmonary nodules. Materials and Methods: By reviewing our Medical Center's radiologic information system, the eight radiologists participating in this study (three board-certified and five resident) retrospectively collected 40 chest radiographs showing a solitary noncalcified pulmonary nodule approximately 1 cm in diameter, and 40 normal chest radiographs. All were obtained using a storage-phosphor system, and CT scans of the same patients served as the gold standard for the presence of a pulmonary nodule. Digital images were displayed on both high-resolution LCD and CRT monitors. The readers were requested to rank each image using a fivepoint scale (1 = definitely negative, 3 = equivocal or indeterminate, 5 = definitely positive), and the data were interpreted using receiver operating characteristic (ROC) analysis. Results: The mean area under the ROC curve was 0.8901 0.0259 for the LCD session, and 0.8716 0.0266 for the CRT session (p > 0.05). The reading time for the LCD session was not significantly different from that for the CRT session (37.12 and 41.46 minutes, respectively; p = 0.889). Conclusion: For detecting small solitary pulmonary nodules, an LCD monitor and a CRT monitor are comparable.
Design of Low Hardware Complexity Multiplexer Using NAND Gates on Quantum-Dot Cellular Automata
Jin-Seong Lee,Jun-Cheol Jeon 보안공학연구지원센터 2016 International Journal of Multimedia and Ubiquitous Vol.11 No.12
This paper presents a 2-to-1 multiplexer based on quantum-dot cellular automata(QCA) with low hardware complexity. A QCA is the computing with cellular automata composed of arrays of quantum-dot devices. We propose a novel 2-to-1 multiplexer using three NAND gates in QCA. We focus on reducing a hardware complexity and minimizing a wasted cell. In order to the implementation of the 2-to-1 multiplexer, we use a new equation using De Morgan’s law. Our new architecture also can increase the speed with clock phase.
Review Article : Use of Hypnosis in the Treatment of Pain
( Jin Seong Lee ),( Young Don Pyun ) 대한통증학회 2012 The Korean Journal of Pain Vol.25 No.2
Hypnosis is an altered state of consciousness that comprises of heightened absorption in focal attention, dissociation of peripheral awareness, and enhanced responsiveness to social cues. Hypnosis has a long tradition of effectiveness in controlling somatic symptoms, such as pain. Pain, the most common symptom in clinical practice, is a multi-dimensional experience, which includes sensory-discriminative, affective-emotional, cognitive and behavioral components. There is a growing recognition for hypnosis and related techniques in pain management. Psychological approaches to pain control, such as hypnosis, can be highly effective analgesics, but are underused in Korea. In this article, we would like to review the basic concepts of hypnosis, the mechanism, and the outcome data of the analgesic effects of hypnosis, and also, its limitations. (Korean J Pain 2012; 25: 75-80)