Cardiac Imaging by Means of Electrocardiographically Gated Multisection Spiral CT: Initial Experience

Abstract

The authors introduce a method for cardiac investigations by using electrocardiographically gated spiral scanning with a four-section computed tomographic system. Three-dimensional images were reconstructed by means of a 250-msec temporal resolution and continuous volume coverage by using a dedicated multisection cardiac volume reconstruction algorithm. Motion-free thin-section volume images were acquired with thin sections and overlapping image increments within a single breath hold. Data segment shifts in time allowed for multiphase imaging.

CT angiography of pulmonary embolism in patients with underlying respiratory disease: impact of multislice CT on image quality and negative predictive value

“…Among the various methods proposed to correct scans containing motion, one can expect further improvement from the forthcoming generation of multislice scanners enabling the acquisition of more than four slices per rotation with shorter scanning times. In addition, the availability of retrospective ECG gating for spiral CT examinations of the entire thorax should help improve image quality, enabling reconstruction of images during the diastole of the cardiac cycle when ventricular movement is at its minimum [12]. The third benefit of multislice over single-slice CT is that the examinations can be performed with thinner sections, leading to higher spatial resolution along the longitudinal axis of the patient.…”

Reproducibility of coronary calcium quantification in repeat examinations with retrospectively ECG-gated multisection spiral CT

“…Recently, mechanical multi-slice CT systems (MSCT) with simultaneous acquisition of four slices, 0.5-s scanner rotation, and 125-ms maximum temporal resolution provided by special reconstruction algorithms have become available for cardiac CT scanning [12,13]. The first studies have shown a high correlation of MSCT with prospectively ECG-triggered acquisition and 250-ms effective exposure time compared with EBCT for the detection of coronary calcification using the Agatston-and volumetric scoring methods [14]; however, it has also been shown that a higher degree of coronary motion artifacts may be present with MSCT due to reduced temporal resolution with 250-ms effective exposure time.…”

Angiografia coronariana minimamente invasiva através de tomografia com múltiplos detectores

“…Since the initial reports in the year 2000 49,50 , various authors have contributed to the analysis of coronary stenosis Surgical grafts (saphenous vein, mammary and radial arteries) have less movement than native coronaries during the cardiac cycle and is the technique indicated for revascularized patient follow-up (tab. 2).…”