Application of Coronary Computed Tomography Angiography in Overweight Patients: Comparison of Automated Tube Voltage Selection Versus 100 kVp Tube Voltage

Yi ZHONG; Zheng-yang ZHOU

doi:10.12259/j.issn.2095-610X.S20210310

Volume 42 Issue 3

Apr. 2021

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Yi ZHONG, Zheng-yang ZHOU. Application of Coronary Computed Tomography Angiography in Overweight Patients: Comparison of Automated Tube Voltage Selection Versus 100 kVp Tube Voltage[J]. Journal of Kunming Medical University, 2021, 42(3): 35-40. doi: 10.12259/j.issn.2095-610X.S20210310

Citation:

Yi ZHONG, Zheng-yang ZHOU. Application of Coronary Computed Tomography Angiography in Overweight Patients: Comparison of Automated Tube Voltage Selection Versus 100 kVp Tube Voltage[J]. Journal of Kunming Medical University, 2021, 42(3): 35-40. doi: 10.12259/j.issn.2095-610X.S20210310

Citation:

Yi ZHONG, Zheng-yang ZHOU. Application of Coronary Computed Tomography Angiography in Overweight Patients: Comparison of Automated Tube Voltage Selection Versus 100 kVp Tube Voltage[J]. Journal of Kunming Medical University, 2021, 42(3): 35-40. doi: 10.12259/j.issn.2095-610X.S20210310

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Application of Coronary Computed Tomography Angiography in Overweight Patients: Comparison of Automated Tube Voltage Selection Versus 100 kVp Tube Voltage

doi: 10.12259/j.issn.2095-610X.S20210310

Yi ZHONG¹,
Zheng-yang ZHOU^{2
,
,}

1.
Dept. of Radiology，Affiliated Jinling Hospital，Medical School of Nanjing University，Nanjing Jiangsu 210002
2.
Dept. of Radiology，Affiliated Drum Tower Hospital，Medical School of Nanjing University，Nanjing Jiangsu 210008，China

Received Date: 2020-12-11
Publish Date: 2021-03-25

Abstract

Abstract

Objective To compare the image quality and radiation dose of automated tube voltage selection （APSCM） and 100 kVp coronary computed tomography angiography （CCTA） in overweight patients. Methods A total of 115 patients with a body mass index （BMI） higher than 25 kg/m² and less than 30 kg/m² and body weight lower than 90 kg underwent high-pitch prospectively ECG-triggered CCTA on a second-generation dual-source CT scanner. All patients were classified into two groups: Group A, 75 patients were examined with APSCM; Group B, 40 patients with a fixed tube voltage of 100 kVp. The attenuation and image noise were measured and signal-to-noise ratio （SNR） and contrast-to-noise ratio （CNR） were calculated. Image quality was evaluated and radiation dose was recorded. Results In Group A, 80 kVp, 100 kVp and 120 kVp were automatically selected in 1 （1.3%）, 51 （68.0%） and 23 （30.7%） patients, respectively. The mean CT attenuations and image noise in APSCM group were significantly lower than those in Group B （all P < 0.001）. Group A showed a higher mean CNR but a lower mean SNR （all P < 0.05） than Group B. The subjective image quality scores have no significant difference between the two groups （all P < 0.05）. The radiation dose in Group B was 22.2% lower than in Group A （ P = 0.004）. Conclusion In patients with BMI higher than 25 kg/m² and less than 30 kg/m², 100 kVp CCTA allows lower radiation dose without compromising image quality when compared with CCTA using APSCM.
- Computed tomography,
- Angiography,
- Coronary artery,
- Tube potential,
- Radiation dose

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References(21)

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