title: [Evaluation of an exposed-radiation dose on a dual-source cardiac computed tomography examination with a prospective electrocardiogram-gated fast dual spiral scan].
abstract: We evaluated exposed-radiation doses on dual-source cardiac computed tomography (CT) examinations with prospective electrocardiogram (ECG)-gated fast dual spiral scans. After placing dosimeters at locations corresponding to each of the thoracic organs, prospective ECG-gated fast dual spirals and retrospective ECG-gated dual spiral scans were performed to measure the absorbed dose of each organ. In the prospective ECG-gated fast dual spiral scans, the average absorbed doses were 5.03 mGy for the breast, 9.96 mGy for the heart, 6.60 mGy for the lung, 6.48 mGy for the bone marrow, 9.73 mGy for the thymus, and 4.58 mGy for the skin. These values were about 5% of the absorbed doses for the retrospective ECG-gated dual spiral scan. However, the absorbed dose differed greatly at each scan, especially in the external organs such as the breast. For effective and safe use of the prospective ECG-gated fast dual spiral scan, it is necessary to understand these characteristics sufficiently.
authors.affiliation: Department of Quantum Medical Technology, Faculty of Health Sciences, Kanazawa University.
authors.forename: Kosuke
authors.initials: K
authors.lastname: Matsubara
authors.forename: Haruka
authors.initials: H
authors.lastname: Koshida
authors.forename: Keita
authors.initials: K
authors.lastname: Sakuta
authors.forename: Hiroyuki
authors.initials: H
authors.lastname: Hayashi
authors.forename: Tadanori
authors.initials: T
authors.lastname: Takata
authors.forename: Junsei
authors.initials: J
authors.lastname: Horii
authors.forename: Keiichi
authors.initials: K
authors.lastname: Kawai
authors.forename: Tomoyuki
authors.initials: T
authors.lastname: Yamamoto
authors.forename: Kichiro
authors.initials: K
authors.lastname: Koshida
mesh_terms: D055424:Cardiac-Gated Imaging Techniques / Q000379:methods*; D017023:Coronary Angiography / Q000379:methods*; D004562:Electrocardiography / Q000379:methods*; D061330:Multidetector Computed Tomography / Q000379:methods*; D019047:Phantoms, Imaging; D011829:Radiation Dosage; D011874:Radiometry / Q000379:methods*