title: Advanced adaptive axial-sequential prospectively electrocardiogram-triggered dual-source coronary computed tomographic angiography in a patient with atrial fibrillation.
abstract: Atrial fibrillation is considered a relative contraindication to coronary computed tomographic angiography (CCTA) because image quality and radiation dose-saving measures largely depend on low and stable heart rates. Most published experiences with CCTA during atrial fibrillation have relied on retrospective gating to mitigate artifacts via electrocardiogram editing. However, a large number of patients arrive at the CT suite with irregular heart rates. We present a case in which we used a prospectively electrocardiogram-triggered axial-sequential scan mode with a novel arrhythmia protection algorithm to obtain motion-free, high-quality CCTA images at a low radiation dose.
authors.affiliation: Department of Cardiovascular Imaging, Cardiac MR PET CT Program, Massachusetts General Hospital, Harvard Medical School, Boston, MA, USA. msidhu1@partners.org
authors.forename: Manavjot S
authors.initials: MS
authors.lastname: Sidhu
authors.forename: Vikram
authors.initials: V
authors.lastname: Venkatesh
authors.forename: Udo
authors.initials: U
authors.lastname: Hoffmann
authors.forename: Brian B
authors.initials: BB
authors.lastname: Ghoshhajra
mesh_terms: D000368:Aged; D000465:Algorithms; D016477:Artifacts; D001281:Atrial Fibrillation / Q000000981:diagnostic imaging*; D055424:Cardiac-Gated Imaging Techniques / Q000379:methods*; D017023:Coronary Angiography / Q000379:methods*; D006339:Heart Rate; D006801:Humans; D011829:Radiation Dosage; D014057:Tomography, X-Ray Computed / Q000379:methods*