Seon Hyeong Choi

Learn More
BACKGROUND Extrathyroidal extension is an important factor to determine the extent of thyroid surgery. The aim of the present study was to evaluate the usefulness of high-resolution ultrasound (US) for predicting the extrathyroidal extension of papillary thyroid microcarcinoma (PTMC). METHODS This study included a total of 221 PTMCs in 181 patients. PTMC(More)
BACKGROUND There has been no report concerning the factors that contribute to the technical difficulty of endoscopic clearance of common bile duct (CBD) stones. OBJECTIVE Our purpose was to determine the factors that contribute to the technical difficulty of endoscopic clearance of CBD stones. DESIGN Prospective study. SETTING A tertiary referral(More)
OBJECTIVE The purpose of this presentation is to illustrate the normal sonographic anatomy of the anterior neck region and the sonographic findings of various kinds of extrathyroid lesions. METHODS Cases of extrathyroid lesions were collected and reviewed retrospectively from our archives. All of the sonographic examinations were performed with(More)
PURPOSE The aim of this study was to evaluate the overall ultrasonographic features and clinical factors that contribute to inadequate sampling in ultrasound-guided fine-needle aspiration biopsy (US-FNAB) of thyroid nodules. MATERIALS AND METHODS From April 2008 to December 2008, 4077 US-FNABs in 3767 consecutive patients were reviewed. We evaluated the(More)
Ultrasound (US) elastography is a valuable imaging technique for tissue characterization. Two main types of elastography, strain and shear-wave, are commonly used to image breast tissue. The use of elastography is expected to increase, particularly with the increased use of US for breast screening. Recently, the US elastographic features of breast masses(More)
Matrix metalloproteinases (MMPs) are matrix-degrading enzymes that play a pivotal role in aggressive behaviours, such as rapid tumour growth, invasion, and metastasis, of several types of solid tumours. In particular, stromal MMP-2 plays important roles in the progression of malignant tumours, but most clinical studies have focused on tumoural MMP-2 and -9(More)
The aim of this study was to compare the diagnostic accuracy and image quality of microcalcifications in zoomed digital contact mammography with digital magnification mammography. Three radiologists with different levels of experience in mammography reviewed 120 microcalcification clusters in 111 patients with a full-field digital mammography system relying(More)
BACKGROUND Quantitative magnetic resonance imaging (MRI) of cartilage has recently been applied to patients with osteoarthritis (OA). T2 mapping is a sensitive method of detecting changes in the chemical composition and structure of cartilage. PURPOSE To establish baseline T2 values of glenohumeral joint cartilage at 3.0 T and compare T2 values among(More)
The differential diagnosis of gallbladder (GB) cancer from inflammatory diseases in patients with a thickened GB wall is difficult, whereas the pre-operative diagnosis of GB cancer is critical for selecting the appropriate surgical modality. We evaluated the clinical usefulness of endoscopic ultrasonography (EUS) for the differential diagnosis of GB wall(More)