Low-Kilovoltage Multi–Detector Row Chest CT in Adults: Feasibility and Effect on Image Quality and Iodine Dose

Sigal-Cinqualbre, Anne; Hennequin, R; Abada, Hicham T.; Chen, Xiaoyan; Paul, Jean-François

doi:10.1148/radiol.2311030191

Cited by 346 publications

(189 citation statements)

References 16 publications

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“…As one can switch the mixture of the acquired 100 kV and 140 kV dataset while the assessment of the dataset it is possible using DECT to increase the attenuation of the contrast material in the coronary arteries by adding more of the 100 kV dataset to the mixture. This effect of DECT of the coronary arteries might be used to reduce the full amount of the applicated contrast medium as earlier proposed for chest and abdominal CT [32,38]. Another technique to lower the amount of injected contrast material and to enhance the attenuation of the dedicated anatomical structures is the use of higher iodine concentrations of the injected contrast material as reported earlier by Rist et al and was applied in our study in group 2 and 3, accordingly [39].…”

Section: Discussionmentioning

confidence: 68%

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: 68%

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

et al. 2010

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“…It has been shown that lower tube voltages considerably reduce the radiation dose of CT examinations [11,36,37]. For CS, this relevant dose reduction is possible without compromising the reproducibility and accuracy of the method.…”

Section: Discussionmentioning

confidence: 99%

Radiation dose values for various coronary calcium scoring protocols in dual-source CT

Stolzmann

Leschka

Betschart

et al. 2008

Int J Cardiovasc Imaging

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Purpose The purpose of this study was to assess the radiation dose and associated image noise of previously suggested calcium scoring protocols using dual-source CT. Methods One hundred consecutive patients underwent coronary calcium scoring using dual-source CT. Patients were randomly assigned to five different protocols: retrospective ECG-gating and tube current reduction to 4% outside the pulsing window at 120 (protocol A) and 100 kV (B), prospective ECG-triggering at 120 (C) and 100 kV (D), and prospective ECG-triggering at 100 kV with attenuation-based tube current modulation (E). Radiation dose parameters and image noise were determined and compared. Results Protocol A resulted in an effective dose of 1.3 ± 0.2 mSv, protocol B in 0.8 ± 0.2 mSv, protocol C in 1.0 ± 0.2 mSv, protocol D in 0.6 ± 0.1 mSv, and protocol E in 0.7 ± 0.1 mSv. Effective doses were significantly lower (P \ 0.001) with 100 kV when compared to 120 kV protocols, and were significantly lower (P \ 0.001) for prospective versus retrospective ECG-gating. No significant difference was found between protocol D and E. Significant negative correlations were found between the CTDI vol and heart rate for both retrospective ECGgating protocols (protocol A: r = -0.98, P \ 0.001; protocol B: r = -0.83, P \ 0.001). The mean image noise was 29.0 ± 6.7 HU, with no significant differences between the five protocols. The image noise was significantly correlated with the body weight (r = 0.21, P \ 0.05) and BMI (r = 0.31, P \ 0.01). Conclusions Effective dose of calcium scoring using dual-source CT ranges from 0.6 to 1.3 mSv. Prospective triggering and lower tube voltage significantly reduces the radiation but yield similar image noise.

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“…The attenuation of coronary vessel is influenced by the individual patients weight, height (expressed by body mass index (BMI) and body surface area (BSA)) and cardiac output [8][9][10][11][12][13], as well as by technical factors related to the type and iodine concentration of the CM [7], the technique for bolus timing [6], the injection volume and rate [14], and tube voltage [15]. Previous CTCA protocols [2,[16][17][18] did not adapt to patients individual body mass or cardiac output.…”

Section: Introductionmentioning

confidence: 99%

Validation of a new contrast material protocol adapted to body surface area for optimized low-dose CT coronary angiography with prospective ECG-triggering

Pazhenkottil

Husmann

Buechel

et al. 2010

Int J Cardiovasc Imaging

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Low-Kilovoltage Multi–Detector Row Chest CT in Adults: Feasibility and Effect on Image Quality and Iodine Dose

Abstract: Weight-adapted low-kilovoltage contrast-enhanced chest CT examinations can be routinely performed with 80 kV. Use of these protocols results in good diagnostic image quality and makes it possible to reduce contrast material use by more than 50%.

Cited by 346 publications

References 16 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 values for various coronary calcium scoring protocols in dual-source CT

Validation of a new contrast material protocol adapted to body surface area for optimized low-dose CT coronary angiography with prospective ECG-triggering

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