[A new helical CT approach with ECG gated reconstruction]

We proposed a new helical CT approach with ECG-gated reconstruction for obtaining high quality 2D, 3D, and 4D images. Original helical images were acquired with a single helical scan with overlapping reconstruction and ECG information. Post-processing to improve temporal resolution and 4D volume set reconstruction were performed, and 2D, 3D and 4D displays were obtained. Using this new method, 2D and 3D images without cardiac motion artifacts were obtained by selecting images in diastolic phase. 2D images with cardiac motion were obtained using images of the same position and different cardiac phases. Finally, 4D images (3D images with phase information) were obtained.