Cardiac spiral dual-source CT with high pitch: a feasibility study

Ertel, Dirk; Lell, Michael; Harig, Frank; Flohr, Thomas; Schmidt, Bernhard; Kalender, Willi A.

doi:10.1007/s00330-009-1503-6

Cited by 59 publications

(46 citation statements)

References 21 publications

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“…However, one disadvantage of CT with lower tube voltage is the parallel increase in image noise [32,33] shows an increase in image noise in cCTA studies obtained at 100 kV in comparison to the standard 120 kV protocol [28,34,35]. Most recently a promising new technique of high pitch spiral acquisition in coronary CT angiography was introduced and showed dose levels around 0,97-2.1 mSv in the initial experience [36,37].…”

Section: Discussionmentioning

confidence: 99%

Dose levels at coronary CT angiography—a comparison of Dual Energy-, Dual Source- and 16-slice CT

et al. 2010

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Purpose To compare the dose estimates and image quality of Dual Energy CT (DECT), Dual Source CT (DSCT) and 16-slice CT for coronary CT angiography (cCTA). Methods Sixty-eight patients were examined with 16 -slice MDCT (group 1), 68 patients with DSCT (group 2) and 68 patients using DSCT in dual energy mode (DECT group 3). CT dose index volume, dose length product, effective dose, signal-to-noise, and contrast-to-noise ratio were compared. Subjective image quality was rated by two observers, blinded to technique. Results The mean estimated radiation dose of all patients investigated on a 16 -slice MDCT was 12±3.59 mSv, for DSCT in single energy 9.8±4.77 mSv and for DECT 4.54± 1.87 mSv. Dose for CTA was significantly lower in group 3 compared to group 1 and 2. The image noise was significantly lower in Group 2 in comparison to group 1 and group 3. There was no significant difference in diagnostic image quality comparing DECT and DSCT. Conclusion cCTA shows better dose levels at both DECT and DSCT compared to 16-slice CT. Further, DECT delivers significantly less dose than regular DSCT or single source single energy cCTA while maintaining diagnostic image quality.

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Section: Discussionmentioning

confidence: 99%

Dose levels at coronary CT angiography—a comparison of Dual Energy-, Dual Source- and 16-slice CT

et al. 2010

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“…One of the most recent advents in radiation dose saving algorithms for cardiac CT is -as discussed already above [1,2] -the ECG-gated high-pitch mode (Fig. 2c).…”

Section: Ecg-gated High-pitch Modementioning

confidence: 99%

“…In the October issue of European Radiology in 2009, Ertel and colleagues [1] described a spiral computed tomography (CT) technique employing a very high table feed (and pitch) for a fast data acquisition of the heart. The authors performed experiments in three pigs using a first-generation dual-source CT machine equipped with prototype software allowing pitch factors up to 3.0.…”

Section: Introductionmentioning

confidence: 99%

Radiation dose of cardiac computed tomography – what has been achieved and what needs to be done

Alkadhi

Leschka

2010

Eur Radiol

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This review highlights the recently introduced techniques by manufacturers and various research workers to reduce radiation dose in coronary CT. It discusses in detail the development of ECG-based tube current modulation, the application of low tube voltage protocols and prospective ECG-gating. It also briefly discusses two further methods of dose reduction, namely minimisation of the x-y anatomical coverage and adaptive statistical iterative reconstruction.

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“…High pitch CT has also been trialled on early DCST equipment using dedicated software (commercially unavailable as yet) and demonstrated unimpaired image quality with respect to spatial and temporal resolution [33].…”

Section: Future Trendsmentioning

confidence: 99%

Paediatric cardiac computed tomography: a review of imaging techniques and radiation dose consideration

Young

Owens²

2010

Eur Radiol

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The significant challenges involved in imaging the heart in small children (<15 kg) have been addressed by, and partially resolved with improvement in temporal and spatial resolution secondary to the advent of new multidetector CT technology. This has enabled both retrospective and prospective ECG-gated imaging in children even at high heart rates (over 100 bpm) without the need for beta blockers. Recent studies have highlighted that the radiation burden associated with cardiac CT can be reduced using prospective ECG-gating. Our experience shows that the resultant dose reduction can be optimised to a level equivalent to that of a non-gated study. This article reviews the different aspects of ECG-gating and the preferred technique for cardiac imaging in the young child (<15 kg). We summarize our evidenced based recommendations for readers, referencing recent articles and using our in house data, protocols and dose measurements discussing the various methods available for dose calculations and their inherent bias.

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Cardiac spiral dual-source CT with high pitch: a feasibility study

Cited by 59 publications

References 21 publications

Dose levels at coronary CT angiography—a comparison of Dual Energy-, Dual Source- and 16-slice CT

Dose levels at coronary CT angiography—a comparison of Dual Energy-, Dual Source- and 16-slice CT

Radiation dose of cardiac computed tomography – what has been achieved and what needs to be done

Paediatric cardiac computed tomography: a review of imaging techniques and radiation dose consideration

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