Fig. 1 Diagram of a dual-source DECT scanner. Dual-source CT with two X-ray tubes and two corresponding detector arrays mounted in the same gantry operates independently at different voltage settings (140 kV…
Fig. 1 a Study protocol for a full cardiac computed tomography (CT) scan, including perfusion CT scan, is illustrated. Scan #1 is a test injection, scan #2 is an adenosine triphosphate…
Fig. 1 A 72-year-old female with unstable angina. a Adenosine-stress 64-slice multidetector CT shows subendocardial perfusion defects in the septum and inferior wall (arrows). b Rest image shows no perfusion abnormalities….
Fig. 1 Effect of temporal resolution on volume measurement. Identical time-volume curves are shown in a patient with a heart rate of 60 bpm. Red bars indicate sampling by the scanner….
Fig. 1 Scatterplots demonstrating the correlation between quantitative cardiac CTA (QCT) and fractional flow measurements (y-axis) indicating a weak correlation (r = −0.32, right), especially in coronary stenosis >50 % (right). Coronary arteries smaller…
Fig. 1 67-year-old man with a history of MI. The unenhanced CT scan shows fatty metaplasia of the subendocardial myocardium of the septum and left ventricular apex (arrowheads). This finding is…
Study Experimental model Single-energy arterial-phase imaging Single-energy delayed-enhancement MDCT Dual-energy delayed-enhancement MDCT Time of MI Hoffmann et al. (2004) Porcine model (n = 7) + – – Acute MI Lardo et al….
Imaging technique Criteria for viability Sens Spec PPV NPV Advantages Disadvantages SPECT Thallium-201 Technetium-99m Perfusion/redistribution, >50 % peak levels Perfusion, >50 % peak levels 87 83 54 65 67 74 79 76…
Fig. 1 A 58-year-old female patient with no prior cardiac history. Single-energy CCTA reconstructed in a basal two-chambers short-axis, and b basal four-chambers transverse axial plane. The images demonstrate transmural hypo-attenuation…
Fig. 1 The degree of stenosis from a distal left anterior descending coronary artery calcified plaque (white arrow) is difficult to determine due to blooming artifacts. Compare to the more proximal…
