title: [Dose reduction during CT coronary angiography].
abstract: Dose delivery during CT coronary angiography with retrospective ECG gating is high especially due to the important slice overlapping. Optimization of the acquisition parameters is necessary to reduce patient exposure. First, the height of the scan field should be limited to the heart. Both kV and mA should be adjusted based on patient morphology. ECG gated exposure modulation with mA reduction during systole, a technique most applicable for patients with slow and regular heart rate, can result in a dose reduction up to 50%. The use of prospective ECG gating can also reduce patient dose. This technique also requires patients with slow and regular heart rate.
authors.affiliation: Service de Radiologie, Hôpital Larrey, CHU d'Angers, Angers, France. sewilloteaux@chu-angers.fr
authors.forename: S
authors.initials: S
authors.lastname: Willoteaux
authors.forename: E
authors.initials: E
authors.lastname: Sibileau
authors.forename: J
authors.initials: J
authors.lastname: Caroff
authors.forename: C
authors.initials: C
authors.lastname: Nedelcu
authors.forename: W
authors.initials: W
authors.lastname: Abi Kalil
authors.forename: S
authors.initials: S
authors.lastname: Delepine
authors.forename: F
authors.initials: F
authors.lastname: Thouveny
mesh_terms: D001822:Body Burden; D015992:Body Mass Index; D055424:Cardiac-Gated Imaging Techniques / Q000009:adverse effects*; D017023:Coronary Angiography / Q000009:adverse effects* / Q000379:methods*; D005602:France; D006801:Humans; D007091:Image Processing, Computer-Assisted / Q000379:methods*; D021621:Imaging, Three-Dimensional / Q000009:adverse effects* / Q000379:methods*; D011829:Radiation Dosage; D011832:Radiation Injuries / Q000209:etiology / Q000517:prevention & control; D011835:Radiation Protection / Q000379:methods*; D011874:Radiometry / Q000379:methods; D014057:Tomography, X-Ray Computed / Q000009:adverse effects* / Q000379:methods*