2003
DOI: 10.1118/1.1533750
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Analytical models for multi-slice helical CT performance parameters

Abstract: One of the most recent technological advancements in computed tomography (CT) is the introduction of multi-slice CT (MSCT). When combined with the helical scan mode, MSCT offers significant improvements in volume coverage, isotropic spatial resolution, and contrast utilization. Although experimental studies have been conducted on MSCT performance, there is a lack of theoretical analysis on the slice sensitivity profile (SSP) and noise performance. In this paper, we derive several closed-form expressions, for l… Show more

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Cited by 40 publications
(30 citation statements)
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“…For conventional filtered back projection (FBP) reconstruction, the quantitative accuracy of lung CT airway measures has also been shown to be highly dependent on the selection of parameters used for reconstruction of the raw scan data as well as the orientation of the airway measured to the scan plane. 7,8 Moreover, due to the fact that the CT studies typically involve multiple lung volumes and multiple time points to characterize longitudinal progression, quantitative airway measurements that require high spatial resolution scans may accrue a relatively high radiation dose for patients to improve spatial resolution while reducing statistical noise. An important challenge in clinical research of early obstructive disease is, then, to obtain accurate quantitative CT (qCT) airway measures with a relatively low x-ray dose protocol.…”
Section: Introductionmentioning
confidence: 99%
“…For conventional filtered back projection (FBP) reconstruction, the quantitative accuracy of lung CT airway measures has also been shown to be highly dependent on the selection of parameters used for reconstruction of the raw scan data as well as the orientation of the airway measured to the scan plane. 7,8 Moreover, due to the fact that the CT studies typically involve multiple lung volumes and multiple time points to characterize longitudinal progression, quantitative airway measurements that require high spatial resolution scans may accrue a relatively high radiation dose for patients to improve spatial resolution while reducing statistical noise. An important challenge in clinical research of early obstructive disease is, then, to obtain accurate quantitative CT (qCT) airway measures with a relatively low x-ray dose protocol.…”
Section: Introductionmentioning
confidence: 99%
“…3 The slice sensitivity profile (SSP) quantifies the amount of signal spreading from one adjacent plane to another in a tomographic imaging modality, and it is analogous to the line spread function perpendicular to the detector plane or in the z-axis. 4 Several investigators have developed analytical models, 5,6 simulations, 7 or have performed experimental [8][9][10] studies of SSP for various tomographic imaging systems. What sets this work apart is that the SSP was physically measured on a commercially available DTS system and the measured parameters were extended to larger angles up to 360…”
Section: Introductionmentioning
confidence: 99%
“…Analytical CT simulator Evaluation of CT scanner performance using analytical simulation techniques has been successfully carried out in a number of studies and continues to be an active research topic [24,25]. In this study, an analytic model of fan-beam CT with 912 detector elements placed on an arc geometry was implemented and validated through comparison with experimental results.…”
Section: Theoretical Backgroundmentioning
confidence: 99%