Four-dimensional cardiac image by helical computed tomography.

Ultrasound and MRI are useful in assessing wall motion and systolic thickening with 2D images. Volumetric data of the helical CT provide frozen 3D images. We sought to determine whether helical CT could assess left ventricular wall motion with 3D animation. We have developed a new cardiac application, ventriculography by 4D enhanced helical CT (4D-CT-VG), which can assess wall motion with 3D animation from any perspective. We demonstrate representative 4D-CT-VG in 3 patients with acute myocardial infarction. In all 3 patients, akinetic areas assessed by 4D-CT-VG were concordant with those evaluated by conventional left ventriculography (LVG) (Figure).