Sang Young Oh

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OBJECTIVE We conducted a retrospective analysis to evaluate the diagnostic outcomes of CT-guided aspiration and core biopsy of 305 pulmonary nodules measuring less than 1 cm. MATERIALS AND METHODS We determined the diagnostic yield of using CT-guided aspiration and core biopsy to analyze 305 lesions in 290 patients. Diagnostic performance was evaluated(More)
One objective was to evaluate the air trapping index (ATI), measured by inspiration/expiration CT, in COPD patients and nonsmokers. Another objective was to assess the association between the pulmonary function test (PFT) and CT parameters such as ATI or other indices, separately in the whole lung, in emphysema, and in hyperinflated and normal lung areas.(More)
OBJECTIVE This study aimed to determine optimal strength of sinogram-affirmed iterative reconstruction (SAFIRE) and to evaluate image quality (IQ) of low-dose chest computed tomography (LDCT) using SAFIRE compared with iterative reconstruction in image space (IRIS) and filtered back projection (FBP). METHODS Thirty patients underwent LDCT. Computed(More)
OBJECTIVE To assess perfusion patterns on a dual-energy pulmonary CT angiography (DECTA) of pulmonary hypertension (PHT) with variable causes and to assess whether the extent of perfusion defect can be used in the severity assessment of PHT. MATERIALS AND METHODS Between March 2007 and February 2011, DECTA scans of 62 consecutive patients (24 men, 38(More)
OBJECTIVE The aim of our study was to retrospectively determine predictive factors for a decline in forced vital capacity (FVC) on initial CT using texture-based automated quantification in patients with idiopathic pulmonary fibrosis (IPF). MATERIALS AND METHODS For our study, 193 patients with IPF and 1-year follow-up pulmonary function tests were(More)
OBJECTIVES The aim of this study was to assess the feasibility of combined xenon-enhanced ventilation (V) and iodine-enhanced perfusion (Q) dual-energy computed tomography (DECT) to evaluate regional V and Q status in patients with chronic obstructive pulmonary disease (COPD). MATERIALS AND METHODS Combined V and Q DECT imaging was performed in 52(More)
To investigate the optimal threshold of subtraction method for quantification of air trapping on co-registered CT in COPD patients in correlation with pulmonary function parameters. From June 2005 to October 2010, 174 patients were included in our study. Inspiration and expiration CT were performed followed by non-rigid registration using in-house software.(More)
OBJECTIVE The purpose of this study was to compare air trapping in healthy volunteers with asthmatics using pulmonary function test and quantitative data, such as specific volume change from paired inspiratory CT and registered expiratory CT. MATERIALS AND METHODS Sixteen healthy volunteers and 9 asthmatics underwent paired inspiratory/expiratory CT. ΔSV,(More)
OBJECTIVE To determine the power-law exponents (D) of emphysema hole-size distributions as a competent emphysema index. Robustness to extreme breath-hold-level variations and correlations with clinical parameters for chronic obstructive pulmonary disease (COPD) were investigated and compared to a conventional emphysema index (EI%). PATIENTS AND METHODS A(More)
Pulmonary sclerosing pneumocytoma is a rare, benign lung tumor that usually occurs in middle-aged women. It usually manifests as isolated pulmonary nodules and is often confused with other solitary, benign nodules. We present a case of sclerosing pneumocytoma with clustered lung nodules and surrounding ground-glass opacity in a single lobe in a young man.(More)