title: Optimized Protocol for Fast CT Angiography of Lower Limbs Using 160-Row Detector.
abstract: OBJECTIVE
  We proposed and tested a novel acquisition protocol for optimizing a fast computed tomography angiography using a 160-row detector scanner using a longer contrast injection time coupled with multiphasic rate of injection.
  
  
  METHODS
  A prospective randomized study was performed to compare image quality, contrast enhancement, and radiation dose in 2 groups (a fast acquisition and a widely accepted slow acquisition).
  
  
  RESULTS
  There was no difference between groups regarding image quality, noise, and diagnostic performance, but we evidenced a trend to higher radiation dose for the fast acquisition protocol.
  
  
  CONCLUSIONS
  An optimized protocol for performing a fast acquisition computed tomography angiography of lower limbs is feasible, has sufficient diagnostic quality, and can be used in selected patients who would benefit from a short-time scan.
authors: From the *Department of Diagnostic Imaging, Hospital Israelita Albert Einstein; †Department of Vascular Surgery, Faculdade de Medicina da Universidade de São Paulo; and ‡Division of Vascular and Endovascular Surgery, Hospital Israelita Albert Einstein, São Paulo, Brazil.
authors: Adriano
authors: A
authors: Tachibana
authors: Bianca Oberhuber
authors: BO
authors: Dias
authors: Bruna Bonaventura
authors: BB
authors: Failla
authors: Camila
authors: C
authors: Dos Santos Silva
authors: Sergio Quilici
authors: SQ
authors: Belczak
authors: Cynthia de Almeida
authors: CA
authors: Mendes
authors: Alexandre
authors: A
authors: Fioranelli
authors: Nelson
authors: N
authors: Wolosker
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D000465:Algorithms; D001158:Arteries / Q000000981:diagnostic imaging*; D000072226:Computed Tomography Angiography / Q000379:methods*; D003287:Contrast Media / Q000008:administration & dosage; D004305:Dose-Response Relationship, Drug; D005260:Female; D006801:Humans; D007275:Injections, Intravenous; D007472:Iohexol / Q000008:administration & dosage / Q000031:analogs & derivatives*; D035002:Lower Extremity / Q000098:blood supply*; D008297:Male; D008875:Middle Aged; D061330:Multidetector Computed Tomography / Q000379:methods*; D011856:Radiographic Image Enhancement / Q000379:methods*; D011857:Radiographic Image Interpretation, Computer-Assisted / Q000379:methods; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D055815:Young Adult
chemical_list: D003287:Contrast Media; C093233:iobitridol; D007472:Iohexol