title: Whole-body CT screening: scan delay and contrast injection duration for optimal enhancement of abdominal organs and deep vessels.
abstract: OBJECTIVE
  To assess the optimal scan delays and contrast injection durations for contrast-enhanced whole-body computed tomography (CT).
  
  
  METHODS
  One hundred forty-two patients were randomized into three groups: protocol A-scan delay of 65 s after starting contrast injection over 30 s; protocol B-105 and 70 s; and protocol C-145 and 110 s, respectively. Contrast enhancement and diagnostic acceptability were assessed.
  
  
  RESULTS
  Qualitative assessment was subtle among the three protocols. Homogenous enhancement of deep veins was more assuredly achieved with protocol C.
  
  
  CONCLUSIONS
  With protocol C, qualitatively acceptable enhancement can be obtained in whole-body CT.
authors.affiliation: Department of Radiology, Gifu Central Hospital, 3-25 Kawabe, 501-1198, Gifu, Japan; Department of Radiology, Gifu University Hospital, Gifu, Japan. Electronic address: haruwow860@yahoo.co.jp.
authors.forename: Haruo
authors.initials: H
authors.lastname: Watanabe
authors.affiliation: Department of Radiology, Gifu University Hospital, Gifu, Japan; Radiology Services, Gifu University Hospital, Gifu, Japan.
authors.forename: Masayuki
authors.initials: M
authors.lastname: Kanematsu
authors.affiliation: Department of Radiology, Gifu University Hospital, Gifu, Japan.
authors.forename: Hiroshi
authors.initials: H
authors.lastname: Kondo
authors.affiliation: Department of Radiology, Gifu University Hospital, Gifu, Japan.
authors.forename: Hideto
authors.initials: H
authors.lastname: Tomimatsu
authors.affiliation: Department of Radiology, Gifu University Hospital, Gifu, Japan.
authors.forename: Kota
authors.initials: K
authors.lastname: Sakurai
authors.affiliation: Department of Radiology, Gifu University Hospital, Gifu, Japan.
authors.forename: Satoshi
authors.initials: S
authors.lastname: Goshima
authors.affiliation: Department of Radiology, Gifu University Hospital, Gifu, Japan.
authors.forename: Hiroshi
authors.initials: H
authors.lastname: Kawada
authors.affiliation: Department of Radiology, Gifu University Hospital, Gifu, Japan.
authors.forename: Yoshifumi
authors.initials: Y
authors.lastname: Noda
authors.affiliation: Radiology Services, Gifu University Hospital, Gifu, Japan.
authors.forename: Toshiharu
authors.initials: T
authors.lastname: Miyoshi
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D003287:Contrast Media / Q000008:administration & dosage*; D005260:Female; D006801:Humans; D007091:Image Processing, Computer-Assisted; D007275:Injections, Intravenous; D008297:Male; D008875:Middle Aged; D009369:Neoplasms / Q000175:diagnosis / Q000000981:diagnostic imaging; D015588:Observer Variation; D010690:Phlebography / Q000379:methods*; D011446:Prospective Studies; D011860:Radiography, Abdominal / Q000379:methods; D013997:Time Factors; D014057:Tomography, X-Ray Computed; D014680:Veins / Q000473:pathology; D051598:Whole Body Imaging
chemical_list: D003287:Contrast Media
keywords: Abdominal organ; Contrast injection duration; Contrast-enhanced CT; Optimal enhancement; Scan delay