Diagnostic accuracy of 320-slice computed-tomography for detection of significant coronary artery stenosis in patients with various heart rates and heart rhythms compared with conventional coronary-angiography

Uehara, Masae; Takaoka, Hiroyuki; Kobayashi, Yoshio; Funabashi, Nobusada

doi:10.1016/j.ijcard.2012.02.017

Cited by 50 publications

(32 citation statements)

References 38 publications

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“…28,29 Comparisons of spatial resolution specifications are difficult, as quoted data are not easily comparable. GE has a "high-definition" mode available for an improved x-y plane spatial resolution.…”

Section: Discussion and Summarymentioning

confidence: 99%

Selecting a CT scanner for cardiac imaging: the heart of the matter

Lewis¹,

Pascoal²,

Keevil³

et al. 2016

BJR

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Coronary angiography to assess the presence and degree of arterial stenosis is an examination now routinely performed on CT scanners. Although developments in CT technology over recent years have made great strides in improving the diagnostic accuracy of this technique, patients with certain characteristics can still be "difficult to image". The various groups will benefit from different technological enhancements depending on the type of challenge they present. Good temporal and spatial resolution, wide longitudinal (z-axis) detector coverage and high X-ray output are the key requirements of a successful CT coronary angiography (CTCA) scan. The requirement for optimal patient dose is a given. The different scanner models recommended for CTCA all excel in different aspects. The specification data presented here for these scanners and the explanation of the impact of the different features should help in making a more informed decision when selecting a scanner for CTCA. INTRODUCTIONClinical interest in the application of CT for the imaging of coronary vessels dates back to 1998 with the introduction of "four-slice" CT scanners. These early multislice models posed limitations to performing coronary angiography; therefore, their use in cardiac applications was confined to coronary calcium scoring, a technique established on electron beam CT scanners and which has less demanding image quality requirements.

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Section: Discussion and Summarymentioning

confidence: 99%

Selecting a CT scanner for cardiac imaging: the heart of the matter

Lewis¹,

Pascoal²,

Keevil³

et al. 2016

BJR

View full text Add to dashboard Cite

show abstract

“…To synchronise for cardiac motion, image acquisition takes place in either a retrospective ECG-gated or prospective ECG-triggered fashion. Scanning the entire heart in one gantry rotation has become feasible with the 320-row CT scanner [54]. This renders CTCA less vulnerable to artefacts due to breathing, irregular heart rhythm or higher rate [54].…”

Section: Technical Aspectsmentioning

confidence: 99%

“…Scanning the entire heart in one gantry rotation has become feasible with the 320-row CT scanner [54]. This renders CTCA less vulnerable to artefacts due to breathing, irregular heart rhythm or higher rate [54]. Also, temporal resolution has improved with faster gantry rotation times and the advent of dual source CT scanners [55], enabling the reconstruction of a cross-sectional image from a 90°instead of a 180°rotation.…”

Section: Technical Aspectsmentioning

confidence: 99%

CT fractional flow reserve: the next level in non-invasive cardiac imaging

2012

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The haemodynamic effect of a coronary artery stenosis is a better predictor of prognosis than anatomical lumen obstruction. Until recently, no individual noninvasive test could provide both accurate coronary anatomy and lesion-specific myocardial ischaemia. However, computer tomography (CT) fractional flow reserve, which can be calculated from a standard CT coronary angiogram, was recently demonstrated to accurately detect and rule out the haemodynamic significance of individual coronary artery stenoses.

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“…Generally CCTA uses either helical or non-helical scanning; the two methods of non-helical acquisition are wide axial scan [1,2] and axial scan. Wide axial scan is available only on limited types of scanners.…”

Section: Introductionmentioning

confidence: 99%

Age-related differences in image quality of prospectively ECG-triggered axial and helical scans for coronary CT angiography

Takase

Fujimoto

Takamura

et al. 2016

Radiol Phys Technol

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We investigated the underlying reasons for the occurrence of misalignment artifacts in prospectively ECG-triggered axial coronary CT angiography scans. In this study we analyzed 56 consecutive patients scanned in axial mode and 66 consecutive patients scanned in helical mode. Predictors for the occurrence of misalignment artifacts were evaluated by multivariable logistic regression analysis for those patients scanned in the axial mode; advanced age was identified as the sole independent predictor (odds ratio: 1.088; 95 % CI: 1.012-1.170; p = 0.0228). In a comparison with the patients scanned in the helical mode, the image quality score for patients aged 65 years or older was significantly higher in helical mode than in axial mode (2.6 ± 0.5 and 2.4 ± 0.7, respectively; p = 0.0313). Misalignment artifacts in the image are more common in the elderly than in younger. Helical mode should be preferred in this older patient population to allow for good diagnostic image quality.

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Diagnostic accuracy of 320-slice computed-tomography for detection of significant coronary artery stenosis in patients with various heart rates and heart rhythms compared with conventional coronary-angiography

Cited by 50 publications

References 38 publications

Selecting a CT scanner for cardiac imaging: the heart of the matter

Selecting a CT scanner for cardiac imaging: the heart of the matter

CT fractional flow reserve: the next level in non-invasive cardiac imaging

Age-related differences in image quality of prospectively ECG-triggered axial and helical scans for coronary CT angiography

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