In vivo validation of cardiac spiral computed tomography using retrospective gating Jörg Albers, MD, Jan M Boese, PhD, Christian F Vahl, MD, Siegfried.

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In vivo validation of cardiac spiral computed tomography using retrospective gating Jörg Albers, MD, Jan M Boese, PhD, Christian F Vahl, MD, Siegfried Hagl, MD The Annals of Thoracic Surgery Volume 75, Issue 3, Pages 885-889 (March 2003) DOI: 10.1016/S0003-4975(02)04505-8

Fig 1 Reduction of motion artifacts by retrospective gating. End-diastolic (upper row) and end-systolic frames (bottom row) are depicted both without gating (left) and using retrospective gating (right). Images were acquired from the same animal. The Annals of Thoracic Surgery 2003 75, 885-889DOI: (10.1016/S0003-4975(02)04505-8)

Fig 2 Three-dimensional reconstruction of functional computed tomography (CT) image data. Postprocessing of CT image data using ray-tracing resulted in illustrative views of end-diastolic (left) and end-systolic (right) rotating cardiac volumes (red). This may be advantageous for future diagnostic routine (frame taken from three-dimensional movie). The Annals of Thoracic Surgery 2003 75, 885-889DOI: (10.1016/S0003-4975(02)04505-8)

Fig 3 Accuracy and clinical value of computed tomography (CT) method. (Left) Values of stroke volume (SV) calculated from CT method (SV-CT, ordinate) showed good correlation with SV taken from the gold standard (SV-flowmeter, abscissa). r = 0.9387; y = 1.024x + 1.185. Linear approximation is indicated by the solid line; 97.5% confidence intervals are delineated with +. (Right) Bland-Altman plot of SV derived by the two methods. Mean difference = −1.75 mL; SD = 4.312 mL. Dotted lines represent the two times standard deviation distance from the mean difference. The Annals of Thoracic Surgery 2003 75, 885-889DOI: (10.1016/S0003-4975(02)04505-8)