Visualisation of non-invasive coronary bypass imaging: 4-row vs. 16-row multidetector computed tomography

Khan, M. Fawad; Herzog, Christopher; Landenberger, Kai; Maataoui, Adel; Martens, Sven; Ackermann, Hanns; Moritz, Anton; Vogl, Thomas J.

doi:10.1007/s00330-004-2521-z

Cited by 17 publications

(17 citation statements)

References 25 publications

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“…The subset of these high-attenuation voxels from the volume is then incorporated into a twodimensional image. MIP is a widely used rendering tool and has proved particularly valuable for evaluation and display in CT angiography (21)(22)(23)(24)(25)(26). MIP has been shown to be more accurate than surface rendering for evaluating the vasculature (8,27,28).…”

Section: Rendering Techniques: Principles and Conceptsmentioning

confidence: 99%

Volume Rendering versus Maximum Intensity Projection in CT Angiography: What Works Best, When, and Why

Fishman¹,

Ney

Heath³

et al. 2006

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315

155

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Section: Rendering Techniques: Principles and Conceptsmentioning

confidence: 99%

Volume Rendering versus Maximum Intensity Projection in CT Angiography: What Works Best, When, and Why

Fishman¹,

Ney

Heath³

et al. 2006

RadioGraphics

315

155

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“…With the introduction of 4-detector CT into clinical practice, the sensitivity (93 100%) and specificity (97.8 100%) of CT for detecting patency or occlusion has increased (5 10). Compared to a 4-slice CT, the16-slice CT demonstrated a significantly better image quality, regardless of the type of graft, for all bypass segments, with the exception of distal anastomosis (11). The accuracy of a 16-slice CT for the diagnosis of graft patency has slightly improved as compared to that of the 4-slice CT; 16 slice CT demonstrating a sensitivity of 96 100% and a specificity of 93 100% (12 17).…”

Section: Discussionmentioning

confidence: 96%

Noninvasive Follow-Up of Coronary Artery Bypass Graft Patency Using Multi-Slice Computed Tomography

Joo

Choi

Seo

et al. 2006

J Korean Radiol Soc

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Purpose:We wanted to evaluate the utility of multi-slice computerized tomography (MSCT) for assessing coronary artery bypass graft patency and/or occlusion. Materials and Methods: For 24 patients, both conventional angiography and CT angiography with 4-MSCT were performed within seven days of one another in order to evaluate the accuracy of MSCT with regard to graft patency and/or occlusion. A follow-up CT angiogram was performed in patients with and without symptoms (n=11, n=34, respectively) with 4-or 16-MSCT. We retrospectively compared the results of MSCT to those of conventional coronary graft angiography. Results: Sixty-five grafts were evaluated for the accuracy of MSCT. Six of those 65 were occluded. The sensitivity, specificity, positive predictive value and negative predictive values of MSCT for the diagnosis of graft occlusion were 100% (6/6), 98% (58/59), 86% (6/7) and 100% (58/58), respectively. Patency could not be determined by angiography in two grafts; however, the grafts proved to be patent on MSCT. On follow-up, new graft occlusions in the asymptomatic patients were detected by MSCT in 8.2% of the previously patent grafts at the two years post-op, and in 15.2% at the three years post-op. Conclusion: MSCT is a practical and accurate noninvasive diagnostic tool for following up coronary artery bypass grafts.

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“…6,7 The potential of MSCT for cardiac imaging was evident from the very beginning. Hence, it evolved very fast from 4-over 16-slice scanners with improved image quality 8 to the latest development represented by the 64-slice machines recently introduced by all global players on the market. * 2 , ** 3 , *** 4 , .…”

Section: Cardiac Ctmentioning

confidence: 99%

Localizing Calcifications in Cardiac CT Data Sets Using a New Vessel Segmentation Approach

2006

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The new generation of multislice computed tomography (CT) scanners allows for the acquisition of high-resolution images of the heart. Based on that image data, the heart can be analyzed in a noninvasive way-improving the diagnosis of cardiovascular malfunctions on one hand, and the planning of an eventually necessary intervention on the other. One important parameter for the evaluation of the severeness of a coronary artery disease is the number and localization of calcifications (hard plaques). This work presents a method for localizing these calcifications by employing a newly developed vessel segmentation approach. This extraction technique has been developed for, and tested with, contrast-enhanced CT data sets of the heart. The algorithm provides enough information to compute the vessel diameter along the extracted segment. An approach for automatically detecting calcified regions that combines diameter information and gray value analysis is presented. In addition, specially adapted methods for the visualization of these analysis results are described.

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Visualisation of non-invasive coronary bypass imaging: 4-row vs. 16-row multidetector computed tomography

Abstract: Significantly better imaging of all bypass types is possible using 16-row MDCT as compared to 4-row MDCT. Assessment of the distal anastomosis yields no difference between 4- and 16-row technology.

Cited by 17 publications

References 25 publications

Volume Rendering versus Maximum Intensity Projection in CT Angiography: What Works Best, When, and Why

Volume Rendering versus Maximum Intensity Projection in CT Angiography: What Works Best, When, and Why

Noninvasive Follow-Up of Coronary Artery Bypass Graft Patency Using Multi-Slice Computed Tomography

Localizing Calcifications in Cardiac CT Data Sets Using a New Vessel Segmentation Approach

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