title: Reduction of thoracic aorta motion artifact with high-pitch 128-slice dual-source computed tomographic angiography: a historical control study.
abstract: OBJECTIVE
  Electrocardiogram-gated imaging combined with multi-detector row computed tomography (MDCT) has reduced cardiac motion artifacts, but it was not practical in the emergency setting. The purpose of this study was to evaluate the ability of a high-pitch, 128-slice dual-source CT (DSCT) scanner to reduce motion artifacts in patients admitted to the emergency room.
  
  
  METHODS
  This study comprised 100 patients suspected of having thoracic aorta lesions. We examined 47 patients with the 128-slice DSCT scanner (DSCT group), and 53 patients were examined with a 64-slice MDCT scanner (MDCT group). Six anatomic areas in the thoracic aorta were evaluated.
  
  
  RESULTS
  Computed tomography images in the DSCT group were distinct, and significant differences were observed in images of all areas between the 2 groups except for the descending aorta.
  
  
  CONCLUSIONS
  The high-pitch DSCT scanner can reduce motion artifacts of the thoracic aorta and enable radiological diagnosis even in patients with tachycardia and without breath hold.
authors.affiliation: From the *Department of Traumatology and Acute Critical Medicine, Osaka University Graduate School of Medicine, Osaka; †Department of Emergency Medicine, Unit of Clinical Medicine, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki; ‡Department of Diagnostic and Interventional Radiology, Osaka University Graduate School of Medicine, Osaka; §Division of Radiology, Department of Medical Technology, Osaka University Hospital, Osaka; ∥Department of Emergency Medical Center, Hyogo Prefectural Nishinomiya Hospital, Hyogo; and ¶Department of Biomedical Statistics, Osaka University Graduate School of Medicine, Osaka, Japan.
authors.forename: Junichiro
authors.initials: J
authors.lastname: Nakagawa
authors.forename: Osamu
authors.initials: O
authors.lastname: Tasaki
authors.forename: Yoshiyuki
authors.initials: Y
authors.lastname: Watanabe
authors.forename: Takeo
authors.initials: T
authors.lastname: Azuma
authors.forename: Mitsuo
authors.initials: M
authors.lastname: Ohnishi
authors.forename: Isao
authors.initials: I
authors.lastname: Ukai
authors.forename: Kenichi
authors.initials: K
authors.lastname: Tahara
authors.forename: Hiroshi
authors.initials: H
authors.lastname: Ogura
authors.forename: Yasuyuki
authors.initials: Y
authors.lastname: Kuwagata
authors.forename: Toshimitsu
authors.initials: T
authors.lastname: Hamasaki
authors.forename: Takeshi
authors.initials: T
authors.lastname: Shimazu
mesh_terms: D000368:Aged; D000792:Angiography / Q000379:methods*; D001013:Aorta, Thoracic / Q000000981:diagnostic imaging*; D001018:Aortic Diseases / Q000000981:diagnostic imaging*; D016477:Artifacts; D005260:Female; D006801:Humans; D008297:Male; D009038:Motion; D011856:Radiographic Image Enhancement / Q000379:methods; D015900:Radiography, Dual-Energy Scanned Projection / Q000379:methods*; D013902:Radiography, Thoracic / Q000379:methods*; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D014057:Tomography, X-Ray Computed / Q000379:methods*