Usefulness of 3D reconstructed computed tomography imaging for double outlet right ventricle.
OBJECTIVE
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.


CONCLUSIONS
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.
Chen
Shyh-Jye
SJ
Department of Medical Imaging, National Taiwan University Hospital and National Taiwan University College of Medicine, Taipei, Taiwan.
Lin
Ming-Tai
MT
Liu
Kao-Lang
KL
Chang
Chung-I
CI
Chen
Hsu-Yi
HY
Wang
Jou-Kou
JK
Lee
Wen-Jeng
WJ
Tsang
Yuk-Ming
YM
Li
Yiu-Wah
YW
D002675:Child, Preschool; D004310:Double Outlet Right Ventricle / Q000000981:diagnostic imaging*; D005260:Female; D006801:Humans; D021621:Imaging, Three-Dimensional; D007223:Infant; D007231:Infant, Newborn; D008297:Male; D014057:Tomography, X-Ray Computed