• 재활치료과학
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• 제12권2호
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• pp.99-107
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• 2023

목적 : 본 연구는 가슴 가동성 제한을 가지고 있는 대상자에게 가슴 가동성 운동이 가슴 가동성, 호흡 패턴 및 호흡 용량에 미치는 영향을 알아보고자 하였다. 연구방법 : 13명의 가슴 가동성 제한을 가진 남/녀 대상자를 대상으로 가슴 가동성 운동(갈비뼈 가동성 운동)을 시행하여 가슴 가동성, 호흡 패턴 및 호흡량에 어떠한 변화가 있는지를 알아보았다. 가슴 가동성 운동 전/후에 연구 참여 대상자의 가슴 가동성(들숨-날숨 간 가슴 확장 길이 측정), 호흡 패턴 형태(가슴 움직임 수직 이동거리 측정) 및 호흡량(forced vital capacity, forced expiratory volume in 1 second)을 측정하였다. 가슴 가동성, 호흡 패턴 및 호흡 용량을 비교하기 위하여 짝-검정을 사용하였다. 통계적 유의성 검정을 위한 유의수준은 .05였다. 결과 : 가슴 가동성과 호흡 패턴은 통계적으로 유의한 차이가 있지만, 호흡 용량은 유의한 차이가 없었다(p < .05). 결론 : 본 연구의 결과를 토대로 갈비뼈 가동화 기법을 이용한 가슴 가동성 운동은 가슴 가동성 개선과 가슴 올림이 유발되는 비정상적인 호흡 패턴을 정상화시킬 수 있는 방법이라고 여겨진다.

• Journal of Chest Surgery
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• 제28권2호
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• pp.213-217
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• 1995

Mediastinal ganglioneuroma is infrequently encountered in childhood. The posterior mediastinal ganglioneuroma which extended the contralateral thorax was very rare. A 4-year-old boy had a ganglioneuroma which involved bilateral thorax and encased the aorta and azygous vein and the ganglioneuroma was successfully extirpated by two-staged operations.; left thoracotomy first right thoracotomy 10days later.

• 한국컴퓨터정보학회논문지
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• 제26권4호
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• pp.143-147
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• 2021

본 연구의 목적은 정상 범위보다 큰 명치각을 가진 대상자들에게 가슴벨트 적용이 척추 안정성에 어떠한 영향을 미치는지에 대하여 알아보고자 하였다. 정상 범위보다 큰 명치각을 가진 총 15 명의 대상자가 본 연구에 참여했으며 가슴벨트 적용 유-무의 조건에서 능동적 두 다리 내리기와 능동적 한 다리 올리기가 수행되었다. 가슴 벨트 적용 여부에 따라 수행 된 두 가지 척추 안정성 테스트 (능동적 두 다리 내리기와 능동적 한 다리 올리기)는 각 조건 간에 유의 한 차이를 보였다. 본 연구의 결과에 따르면, 가슴벨트 적용은 비정상적으로 증가된 명치각으로 인해 척추 또는 몸통 불안정성을 가진 대상자에게 척추를 안정화 시켜줄 수 있는 효과적인 치료적 방법으로 여겨진다.

• PNF and Movement
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• 제19권2호
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• pp.243-250
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• 2021

Purpose: The purpose of this study was to observe office workers' postural behaviors during computer work to identify the risk factors for head and thorax postural behaviors. Methods: The participants included 57 office workers who worked longer than 20 hours on a computer. Postural behaviors during computer work were measured using 3-D wearable motion sensors on the forehead and sternum. A multivariate linear regression model evaluated the association between various risk factors (neck pain, demographics, and environmental factors) and non-head and thorax postural behaviors. Results: The participants maintained their head and thorax in neutral postures (defined as 10° extension~10° flexion and 5° extension~10° flexion, respectively) for 24.7% and 39.3% of the total recorded time. Those who reported neck pain at the measurement of postural behaviors showed less time spent in thorax postures. Current neck pain, high desk height, and the distance between the keyboard and the edge of the desk (cm) were found to be related to less time spent in a neutral thorax posture. Conclusion: Office environment factors and current neck pain might affect workers' thorax postures, which might also determine the orientation of head postures during computer work.

• Tuberculosis and Respiratory Diseases
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• 제56권6호
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• pp.571-584
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• 2004

Magnetic Resonance Imaging (MRI) is one of the most advanced imaging techniques in clinical and research medicine. However, clinical application of MRI to the lung or thorax has been limited due to various drawbacks. Low signal intensity of the lung and cardiac and respiratory movements are the most serious problems with MRI in thorax. Nevertheless, MRI is superior to CT in some selected patients with thoracic diseases. The role of clinical MRI in thoracic disease has been widened with improvement of MR equipments and development of new pulse sequences. Otherwise, functional assessment of lung by MRI has been studied for the last decade. These include perfusion MRI with or without contrast enhancement and ventilation MRI with oxygen-enhancement or hyperpolarized noble gas, $^3He$ and $^{129}Xe$.

• Journal of Chest Surgery
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• 제49권3호
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• pp.165-170
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• 2016

Background: In elderly high-risk surgical patients, sutureless aortic valve replacement (AVR) should be an alternative to standard AVR. The potential advantages of sutureless aortic prostheses include reducing cross-clamping and cardiopulmonary bypass (CPB) time and facilitating minimally invasive surgery and complex cardiac interventions, while maintaining satisfactory hemodynamic outcomes and low rates of paravalvular leakage. The current study reports our single-center experience regarding the early outcomes of sutureless aortic valve implantation. Methods: Between October 2012 and June 2015, 65 patients scheduled for surgical valve replacement with symptomatic aortic valve disease and New York Heart Association function of class II or higher were included to this study. Perceval S (Sorin Biomedica Cardio Srl, Sallugia, Italy) and Edwards Intuity (Edwards Lifesciences, Irvine, CA, USA) valves were used. Results: The mean age of the patients was $71.15{\pm}8.60years$. Forty-four patients (67.7%) were female. The average preoperative left ventricular ejection fraction was $56.9{\pm}9.93$. The CPB time was $96.51{\pm}41.27minutes$ and the cross-clamping time was $60.85{\pm}27.08minutes$. The intubation time was $8.95{\pm}4.19hours$, and the intensive care unit and hospital stays were $2.89{\pm}1.42days$ and $7.86{\pm}1.42days$, respectively. The mean quantity of drainage from chest tubes was $407.69{\pm}149.28mL$. The hospital mortality rate was 3.1%. A total of five patients (7.69%) died during follow-up. The mean follow-up time was $687.24{\pm}24.76days$. The one-year survival rate was over 90%. Conclusion: In the last few years, several models of valvular sutureless bioprostheses have been developed. The present study evaluating the single-center early outcomes of sutureless aortic valve implantation presents the results of an innovative surgical technique, finding that it resulted in appropriate hemodynamic conditions with acceptable ischemic time.

• 대한방사선치료학회지
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• 제26권1호
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• pp.83-89
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• 2014

목 적 : 토모테라피(Tomotherapy)와 선형가속기(Linac)를 이용한 세기조절방사선치료(IMRT) 시 환자의 정확한 위치잡이를 위해 매일 시행되는 MVCT와 CBCT의 imaging dose를 비교 평가해보고자 한다. 대상 및 방법 : 인체 모형 팬텀(Anderson rando Phantom, USA)을 Head, Thorax, pelvis의 3부위로 분류하여 촬영 부위의 중심에 $0.5{\times}0.5cm2$. 크기로 자른 GafChromic EBT3 film을 팬텀의 표면의 상, 하, 좌, 우와 팬텀의 표면에서 2cm깊이의 상, 하, 좌, 우, 중심에 위치시킨 뒤 토모테라피(Hi Art)와 Novalis Tx의 OBI를 이용하여 surface dose와 inner dose를 각각 3회씩 반복 측정한다. 측정 된 film은 RIP version6.0을 이용하여 값을 산출한 뒤 일원분산분석법을 이용하여 선량의 평균값을 산출한다. 결 과 : 인체모형팬텀을 이용하여 MVCT와 CBCT를 시행한 결과 MVCT inner dose의 측정값은 head에서 $15.43cGy{\pm}6.05$, thorax에서 $16.62cGy{\pm}3.08$, pelvis에서 $16.81cGy{\pm}5.24$로 나타났으며, CBCT inner dose는 head에서 $13.28{\pm}3.68$, thorax에서 $13.66{\pm}4.04$, pelvis에서 $15.52{\pm}3.52$의 값을 나타냈다. Surface dose의 측정 값은 MVCT 시행 시 head에서 $11.64{\pm}4.05$, thorax에서 $12.16{\pm}4.38$, pelvis에서 $12.05{\pm}2.71$로 나타났으며, CBCT의 경우 head에서 $14.59{\pm}3.51$, thorax에서 $15.82{\pm}2.89$, pelvis에서 $17.48{\pm}2.80$을 나타내었다. 결 론 : Inner dose의 경우 kV energy를 사용하는 CBCT보다 MV energy를 사용하는 MVCT에서 head에서 1.16배, thorax에서 1.22배, pelvis에 서 1.08배 높게 나타났으며, Surface dose의 경우 MVCT보다는 CBCT의 head에서 1.25배, thorax에서 1.30배, pelvis에서 1.45배 높게 측정되었다. Imaging dose는 치료 선량에 비해 작은 양이지만 daily로 시행되는 만큼 정상조직에 일정부분 영향을 미칠 것으로 생각된다. 하지만 IMRT치료를 위해서는 영상유도를 통한 IGRT가 반드시 병행되어 치료계획과 실제치료간 오차를 최소화하여야 한다. 따라서 환자가 받는 imaging dose를 최소화하기 위해서는 치료계획 시 Imaging dose를 고려하여 치료계획을 수립하거나 MVCT 촬영 시 Scan 범위를 최소화하여 시행해야 될 것으로 사료된다.

• 한국정밀공학회:학술대회논문집
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• 한국정밀공학회 2010년도 춘계학술대회 논문집
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• pp.1367-1368
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• 2010

• Tuberculosis and Respiratory Diseases
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• 제40권4호
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• pp.345-352
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• 1993

The role of magnetic resonance(MR) imaging in the evaluation of thoracic disease has been limited Nontheless, MR has inherent properties of better contrast resolution than CT allowing tissue-specific diagnosis. MR has capability of direct imaging in sagittal, coronal, and oblique planes which provide better anatomic information than axial images of CT such as lesions in the pulmonary apex, aorticopulmonary window, peridiaphragmatic region, and subcarinal region. MR is sensitive to blood flow making it an ideal imaging modality for the evaluation of cardiovascular system of the thorax without the need for intravenous contrast media. Technical developments and better control of motion artifacts have resulted in improved image quality, and clinical applications of MR imaging in thoracic diseases have been expanded. Although MR imaging is considered as a problem-solving tool in patients with equivocal CT findings, MR should be used as the primary imaging modality in the following situations: 1) Evaluation of the cardiovascular abnormalities of the thorax 2) Evaluation of the superior sulcus tumors 3) Evaluation of the chest wall invasion or mediastinal invasion by tumor 4) Evaluation of the posterior mediastinal mass, especially neurogenic tumor 5) Differentiation of fibrosis and residual or recurrent tumor, especially in lymphoma 6) Evaluation of brachial plexopathy With technical developments and fast scan capabilities, clinical indications for MR imaging in thorax will increase in the area of pulmonary parenchymal and pulmonary vascular imaging.

• 센서학회지
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• 제17권6호
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• pp.447-453
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• 2008

Respiration rate is one of the important vital signs. Photo-plethysmography (PPG) measurement especially on a finger has been widely used in pulse oximetry and also used in estimating respiration rate. It is well known that PPG contains respiration-induced intensity variation (RIIV) signal. However, the accuracy of finger PPG method has been controversial. We introduced a new technique of enhancing motion artifact by respiration. This was achieved simply by measuring PPG on the thorax. We examined the accuracy of these two PPG methods by comparing with two existing methods based on thoracic volume and nostril temperature changes. PPG sensing on finger tip, which is the most common site of measurement, produced 6.1 % error. On the other hand, our method of PPG sensing on the thorax achieved 0.4 % error which was a significant improvement. Finger PPG is sensitive to motion artifact and it is difficult to recover fully small respiratory signal buried in waveform dominated by absorption due to blood volume changes. Thorax PPG is poor to represent blood volumes changes since it contains substantial motion artifact due to respiration. Ironically, this inferior quality ensures higher accuracy in terms of respiration measurement. Extreme low-cost and small-sized LED/silicon detector and non-constrained reflection measurement provide a great candidate for respiration estimation in ubiquitous or personal health monitoring.