Hsu-Yi Chen

Usefulness of three-dimensional electron beam computed tomography for evaluating tracheobronchial anomalies in children with congenital heart disease☆

This study was undertaken to delineate tracheobronchial anomalies associated with congenital heart disease. From June 1995 to December 2000, 1,245 children with congenital heart disease underwent cardiac electron beam computed tomography with 3-dimensional reconstruction on an independent workstation. Tracheobronchial anomalies are strongly associated with congenital heart disease and accompanying tracheal stenosis is not uncommon. With 3-dimensional reconstruction, electron beam computed tomography provided excellent anatomic definition of the central tracheobronchial abnormalities.

Usefulness of 3D Reconstructed Computed Tomography Imaging for Double Outlet Right Ventricle

BACKGROUND/PURPOSE To evaluate the value of 3D reconstructed computed tomography (CT) imaging for patients with double outlet right ventricle (DORV). METHODS CT images were obtained preoperatively from 17 patients who ranged in age from 5 days to 5 years. Reconstructed 3D images were created using gradient-shading surface rendering, which allowed partial subtraction of the anterior sections of the virtual heart to view the interior. Interpretations of CT, echocardiography and cine-cardioangiography were compared and verified from surgical findings, autopsy, and consensus upon review of all imaging and diagnostic tests. RESULTS Three subaortic, seven subpulmonary, six non-committed, and one double-committed subtypes of ventricular septal defect (VSD) were observed. The 3D electron beam CT images provided good delineation of the spatial relationship inside the heart. The range of diagnostic accuracy for all VSD types in DORV was 88-100% for 3D CT, 71-94% for echocardiography, and 60-100% for cine-cardioangiography. In comparison, 3D CT offered better diagnostic accuracy for all variants of DORV. CONCLUSION 3D constructed CT imaging is a good modality for differentiating VSD type in DORV. It allowed us to directly evaluate the inside of cardiac chambers for the right ventricular outlet, great arterial root, and determine the VSD relationships.

Esophageal varices in congenital heart disease with total anomalous pulmonary venous connection

Total anomalous pulmonary venous connection (TAPVC) is an uncommon congenital anomaly in which the anatomical presentations vary widely among patients. We hereby present two newborns with TAPVC associated with asplenia syndrome; both had severe esophageal varices due to infradiaphragmatic pulmonary venous drainage. Ultrafast computed tomography (CT) scanning was superior to color Doppler echocardiography and cardiac catheterization as it provided a detailed portrait of the pulmonary drainage. The remarkable radiographic manifestations are presented.

Congenital cardiac rhabdomyoma

a Department of Diagnostic Radiology, Shin Kong Wu Ho-Su Memorial Hospital, Taipei, Taiwan b Department of Radiology, Fu Jen Catholic University School of Medicine, Taipei, Taiwan c Department of Surgery, National Taiwan University Hospital and National Taiwan University College of Medicine, Taipei, Taiwan d Department of Medical Imaging, National Taiwan University Hospital and National Taiwan University College of Medicine, Taipei, Taiwan

Three dimensional medical imaging: from dream to reality.

Mr Cameron used three-dimensional (3D) camera acquisition and 3D projecting systems to present a fantastic virtual reality. In the medical field, the human body is naturally 3D. With the development of the X-ray by Wilhelm Conrad Rontgen in 1895, one of the first human medical images was the film of his wife Bertha’s hand with a ring on her finger.

Clinical Usefulness of Three-dimensional Computed Tomography with Color-encoding for Tumors in the Face

Objective: The anatomical relationship of a neoplasm in the face to adjacent structures in so complex that radiologists and many surgeons have a difficult time assimilating cross-sectional imaging into a complete picture of the true extent of bone involvement using conventional computed tomography (CT). This study was undertaken to demonstrate the usefulness of three-dimensional (3D) color-encoded tumor CT imaging in preoperative evaluation. Patients and Methods: From January 1999 to June 1999,frouteen cases of carniofacial tumors (11 male:3 female; from 4 to 86 years old) were collected and analyzed. We rendered the segmented volumetric data with a gradient shading color protocol at an independent workstation by encoding the “white” of the bone and the “red” of the tumor. Dynamic cine observation with changing viewpoints allowed us to perceive 3D shapes and the relationships of the tumor with the surrounding bones. Results: On the 3D display, the outstanding “red” mass could be seen clearly at a glance. The involvement, extension and relationship between the “red” tumor and adjacent “white” bone could be easily evaluated. Conclusion: Three-dimensional color-encoded CT imaging offers greater anatomical and diagnostic illustration than conventional CT, improving understanding of bony invasion by craniofacial malignancy and providing a useful adjunct to preoperative planning and patient education. (Tzu Chi Med J 2000; 12:25-30)