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Tain Lee

Publications and source records attributed to Tain Lee.

8 recordsLinked to original sources
PubMed2006

Using multidetector-row CT in neonates with complex congenital heart disease to replace diagnostic cardiac catheterization for anatomical investigation: initial experiences in technical and clinical feasibility.

BACKGROUND: Echocardiography is the first-line modality for the investigation of neonatal congenital heart disease. Diagnostic cardiac catheterization, which has a small but recognized risk, is usually performed if echocardiography fails to provide a confident evaluation of the lesions. OBJECTIVE: To verify the technical and clinical feasibilities of replacing diagnostic cardiac catheterization with multidetector-row CT (MDCT) in neonatal complex congenital heart disease. MATERIALS AND METHODS: Over a 1-year period we prospectively enrolled all neonates with complex congenital heart disease referred for diagnostic cardiac catheterization after initial assessment by echocardiography. MDCT was performed using a 40-detector-row CT scanner with dual syringe injection. A multidisciplinary congenital heart disease team evaluated the MDCT images and decided if further diagnostic cardiac catheterization was necessary. The accuracy of MDCT in detecting separate cardiovascular anomalies and bolus geometry of contrast enhancement were calculated. RESULTS: A total of 14 neonates were included in the study. No further diagnostic cardiac catheterization was needed in any neonate. The accuracy of MDCT in diagnosing separate cardiovascular anomalies was 98% (53/54) with only one atrial septal defect missed in a patient with coarctation syndrome. The average cardiovascular enhancement in evaluated chambers was 471 HU. No obvious beam-hardening artefact was observed. CONCLUSION: The technical and clinical feasibility of MDCT in complex congenital heart disease in neonates is confirmed. After initial assessment with echocardiography, MDCT could probably replace diagnostic cardiac catheterization for further anatomical clarification in neonates.

Cardiac Catheterization↗
PubMed2006

Radiographic, clinical, and prognostic features of complicated and uncomplicated community-acquired lobar pneumonia in children.

BACKGROUND AND PURPOSE: The incidence of community-acquired lobar pneumonia in conjunction with either necrosis or empyema in children has rapidly increased in recent years. This study aimed to evaluate the radiographic, clinical, and predicted factors of complicated and uncomplicated lobar pneumonia in children. METHODS: This retrospective study included 131 patients younger than 18 years of age with community-acquired lobar pneumonia treated between January 2002 and March 2005. Multiple logistic regression analysis was performed to demonstrate the risk factors of complicated lobar pneumonia. RESULTS: The proportion of children with lobar pneumonia in children increased dramatically from 7% in 2002 to 19% in 2004. Analysis revealed the presence of elevated C-reactive protein level (>12 mg/dL) [odds ratio (OR), 3.51; 95% confidence interval (CI), 1.61-7.66], persistent fever for more than 1 week before admission (OR, 1.14; 95% CI, 1.04-1.26), and multilobar (> or =2 lobes) confluent lung opacity on chest radiographs (OR, 2.83; 95% CI, 1.27-6.33) were independent predictors of the occurrence of complicated lobar pneumonia. A progressive increase in the number of penicillin-non-susceptible Streptococcus pneumoniae isolates was found during the study period. Prolonged fever was a common clinical feature of hospitalized children with lobar pneumonia. Failure of consolidative pneumonia to respond to appropriate antibiotic treatment within 4.4 days was associated with the development of necrosis or empyema. CONCLUSIONS: Complicated and uncomplicated lobar pneumonia are difficult to distinguish based on clinical symptoms at the time of admission. The presence of the above risk factors can help in the early diagnosis of complicated lobar pneumonia.

C-Reactive Protein↗
PubMed2003

Classification of clustered microcalcifications using a Shape Cognitron neural network.

A new shape recognition-based neural network built with universal feature planes, called Shape Cognitron (S-Cognitron) is introduced to classify clustered microcalcifications. The architecture of S-Cognitron consists of two modules and an extra layer, called 3D figure layer lies in between. The first module contains a shape orientation layer, built with 20 cell planes of low level universal shape features to convert first-order shape orientations into numeric values, and a complex layer, to extract second-order shape features. The 3D figure layer is a feature extract-display layer that extracts the shape curvatures of an input pattern and displays them as a 3D figure. It is then followed by a second module made up of a feature formation layer and a probabilistic neural network-based classification layer. The system is evaluated by using Nijmegen mammogram database and experimental results show that sensitivity and specificity can reach 86.1 and 74.1%, respectively.

Algorithms↗
PubMed2002

Synovial sarcoma of the mediastinum.

Synovial sarcomas are exceedingly rare neoplasms of the mediastinum. We herein report a case of synovial sarcoma occurring in the mediastinum of an 11-year-old boy. The patient presented with superior vena cava syndrome, and the tumor was found located in the upper superior mediastinum. Due to the large size of the tumor making complete removal impossible, an incisional biopsy was performed. The biopsy showed the typical biphasic pattern of synovial sarcoma. After surgery, the patient received radiotherapy and chemotherapy, and was still alive 2 years after diagnosis.

Child↗
PubMedDate not supplied

A rare hernia of intra-abdominal fat in the thorax under an intact diaphragm: multidetector computed tomography.

Neither abdominal wall hernia nor diaphragmatic hernia is an unusual disease. But some may have difficulty diagnosing the presence of intra-abdominal fat in the thorax under an intact diaphragm. We report a case with an external compression of the right lower lung from intra-abdominal fat owing to a hernia through the right lateral abdominal wall and secondary through the ninth intercostal space of the chest wall to the right lower thorax without traumatic history. Multiple images, including multidetector row computed tomography, are reviewed.

Aged↗