TY - JOUR
T1 - Image Quality, Overall Evaluability, and Effective Radiation Dose of Coronary Computed Tomography Angiography with Prospective Electrocardiographic Triggering Plus Intracycle Motion Correction Algorithm in Patients with a Heart Rate over 65 Beats per Minute
AU - Pontone, Gianluca
AU - Muscogiuri, Giuseppe
AU - Baggiano, Andrea
AU - Andreini, Daniele
AU - Guaricci, Andrea I.
AU - Guglielmo, Marco
AU - Fazzari, Fabio
AU - Mushtaq, Saima
AU - Conte, Edoardo
AU - Annoni, Andrea
AU - Formenti, Alberto
AU - Mancini, Elisabetta
AU - Verdecchia, Massimo
AU - Fusini, Laura
AU - Bonfanti, Lorenzo
AU - Consiglio, Elisa
AU - Rabbat, Mark G.
AU - Bartorelli, Antonio L.
AU - Pepi, Mauro
PY - 2018/7/1
Y1 - 2018/7/1
N2 - Purpose: Recently, a new intracycle motion correction algorithm (MCA) was introduced to reduce motion artifacts from heart rate (HR) in coronary computed tomography angiography (cCTA). The aim of the study was to evaluate the image quality, overall evaluability, and effective radiation dose (ED) of cCTA with prospective electrocardiographic (ECG) triggering plus MCA as compared with standard protocol with retrospective ECG triggering in patients with HR≥65 bpm. Materials and Methods: One hundred consecutive patients (67±10 y) scheduled for cCTA with 65<HR<80 bpm were retrospectively analyzed. The patients were assigned to 2 groups undergoing prospective (group 1) or retrospective (group 2) triggered cCTA. The study protocol was approved by the Institutional Ethics Committee and a written informed consent was obtained from all patients. Image noise, signal to noise ratio, contrast to noise ratio, Likert image quality score (score 1, nondiagnostic; score 2, adequate; score 3, good; score 4, excellent), overall image evaluability, and ED were measured and compared between the 2 groups. Both vessel-based and patient-based analyses were evaluated. Student test or Wilcoxon test were used to evaluate differences of continuous variables, whereas the χ 2 test was used to study differences with regard to categorical data. A P-value <0.05 was considered statistically significant. Results: cCTA was successfully performed in all patients. In a segment-based model, group 1 compared with group 2 showed a lower rate of overall artifacts (67% vs. 83%; P<0.001) and motion artifacts (49% vs. 66%; P<0.001), resulting in a better Likert image quality score (2.83±1.03 vs. 2.37±1.02; P<0.01) and overall evaluability (85% vs. 75%; P<0.01). Group 1 showed a lower ED as compared with group 2 (3.1±1.9 vs. 11.9±3.3 mSv; P<0.01). Conclusion: MCA and cCTA with prospective ECG-triggering acquisition in patients with high HR improves image quality and overall evaluability compared with cCTA with standard retrospective ECG triggering.
AB - Purpose: Recently, a new intracycle motion correction algorithm (MCA) was introduced to reduce motion artifacts from heart rate (HR) in coronary computed tomography angiography (cCTA). The aim of the study was to evaluate the image quality, overall evaluability, and effective radiation dose (ED) of cCTA with prospective electrocardiographic (ECG) triggering plus MCA as compared with standard protocol with retrospective ECG triggering in patients with HR≥65 bpm. Materials and Methods: One hundred consecutive patients (67±10 y) scheduled for cCTA with 65<HR<80 bpm were retrospectively analyzed. The patients were assigned to 2 groups undergoing prospective (group 1) or retrospective (group 2) triggered cCTA. The study protocol was approved by the Institutional Ethics Committee and a written informed consent was obtained from all patients. Image noise, signal to noise ratio, contrast to noise ratio, Likert image quality score (score 1, nondiagnostic; score 2, adequate; score 3, good; score 4, excellent), overall image evaluability, and ED were measured and compared between the 2 groups. Both vessel-based and patient-based analyses were evaluated. Student test or Wilcoxon test were used to evaluate differences of continuous variables, whereas the χ 2 test was used to study differences with regard to categorical data. A P-value <0.05 was considered statistically significant. Results: cCTA was successfully performed in all patients. In a segment-based model, group 1 compared with group 2 showed a lower rate of overall artifacts (67% vs. 83%; P<0.001) and motion artifacts (49% vs. 66%; P<0.001), resulting in a better Likert image quality score (2.83±1.03 vs. 2.37±1.02; P<0.01) and overall evaluability (85% vs. 75%; P<0.01). Group 1 showed a lower ED as compared with group 2 (3.1±1.9 vs. 11.9±3.3 mSv; P<0.01). Conclusion: MCA and cCTA with prospective ECG-triggering acquisition in patients with high HR improves image quality and overall evaluability compared with cCTA with standard retrospective ECG triggering.
KW - effective radiation dose
KW - heart rate
KW - intracycle motion correction algorithm
KW - prospective triggering
KW - retrospective triggering
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U2 - 10.1097/RTI.0000000000000320
DO - 10.1097/RTI.0000000000000320
M3 - Article
C2 - 29346192
AN - SCOPUS:85041557089
SN - 0883-5993
VL - 33
SP - 225
EP - 231
JO - Journal of Thoracic Imaging
JF - Journal of Thoracic Imaging
IS - 4
ER -