title: Optimal scanning timing by use of multi-detector row computed tomography during thoracic aortography for depiction of arteries causing hemoptysis.
abstract: Scanning timing for multi-detector row computed tomography during thoracic aortography (MDCT-TA) was explored for depiction of arteries responsible for hemoptysis. The mean time (MT) from contrast medium (CM) injection to peak enhancement (PE) in the descending aorta at the level of the diaphragm on thoracic aortography was investigated. The MT to PE of the descending aorta at the level of diaphragm was 4.86 ± 0.42 s, with 30 mL CM at an injection rate of 10 mL/s. CM injection was completed 1.86 s before the final slice was obtained. The CM injection duration can be calculated as follows: 4.86 s + scan time - 1.86 s. The optimal scanning timing is a scan delay of approximately 5 s from the start of CM injection, and the CM injection duration is expressed as scan time plus 3 s. MDCT-TA depicted the branching sites of the bronchial arteries in all cases.
authors.affiliation: Department of Radiology, Wakayama Medical University, 811-1 Kimiidera, Wakayamashi, Wakayama, 641-8510, Japan.
authors.forename: Seiki
authors.initials: S
authors.lastname: Hosokawa
authors.forename: Nobuyuki
authors.initials: N
authors.lastname: Kawai
authors.forename: Morio
authors.initials: M
authors.lastname: Sato
authors.forename: Hiroki
authors.initials: H
authors.lastname: Minamiguchi
authors.forename: Hiroki
authors.initials: H
authors.lastname: Sanda
authors.forename: Motoki
authors.initials: M
authors.lastname: Nakai
authors.forename: Kazuhiro
authors.initials: K
authors.lastname: Murotani
authors.forename: Tadayoshi
authors.initials: T
authors.lastname: Nishioku
authors.forename: Tetsuo
authors.initials: T
authors.lastname: Sonomura
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D001027:Aortography / Q000379:methods*; D001981:Bronchial Arteries / Q000000981:diagnostic imaging*; D001987:Bronchiectasis / Q000150:complications; D003287:Contrast Media / Q000008:administration & dosage / Q000737:chemistry; D004621:Embolization, Therapeutic / Q000295:instrumentation / Q000379:methods*; D005260:Female; D006469:Hemoptysis / Q000000981:diagnostic imaging* / Q000628:therapy*; D006801:Humans; D008175:Lung Neoplasms / Q000150:complications; D008297:Male; D008875:Middle Aged; D011446:Prospective Studies; D055732:Pulmonary Aspergillosis / Q000150:complications; D014057:Tomography, X-Ray Computed / Q000379:methods*; D014397:Tuberculosis, Pulmonary / Q000150:complications
chemical_list: D003287:Contrast Media