title: [Tissue harmonic imaging sonography. Is the image quality in routine  abdominal ulstrasound improved?].
abstract: OBJECTIVE
  Evaluation and statistical analysis of the influence of THI with pulse-inversion technology on image quality in abdominal ultrasound in comparison to conventional sonography.
  
  
  METHODS
  In 25 patients 398 ultrasound images of the abdomen were evaluated in a prospective, double blind study. 49% of the images were obtained with THI sonography, 51% with conventional sonography, respectively. Image parameter, anatomical region and image plane were kept constant by using a switchable ultrasound probe. Image contrast, delineation of organs, detection of vessels and artifacts in cystic structures were evaluated by four radiologists using a 3-grade scale. The interobserver variability was determined.
  
  
  RESULTS
  The results of all groups showed statistically significant improvement compared to conventional sonography. High agreement of the evaluaters was achieved for image contrast and delineation of organs, less agreement in detection of vessels and artifacts in cystic structures, respectively.
  
  
  CONCLUSIONS
  Image contrast and delineation of organs to neighboring structures as well as reduction of artifacts in cystic structures and vessels are statistically significantly improved with THI sonography using pulse-inversion technology in comparison to conventional sonography.
authors.affiliation: Zentralröntgeninstitut und Schnittbildzentrum, Krankenhaus der Stadt Wien-Lainz. stm@roe.khl.magwien.gv.at
authors.forename: M
authors.initials: M
authors.lastname: Stiskal
authors.forename: R
authors.initials: R
authors.lastname: Steinbach
authors.forename: G
authors.initials: G
authors.lastname: Obholzer
authors.forename: W
authors.initials: W
authors.lastname: Frank
authors.forename: H
authors.initials: H
authors.lastname: Fischer
authors.forename: H
authors.initials: H
authors.lastname: Czembirek
mesh_terms: D000005:Abdomen / Q000000981:diagnostic imaging*; D016477:Artifacts; D001808:Blood Vessels / Q000000981:diagnostic imaging; D004311:Double-Blind Method; D006801:Humans; D015588:Observer Variation; D011446:Prospective Studies; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D014463:Ultrasonography / Q000379:methods*
vernacular_title: Tissue Harmonic Imaging Sonographie. Wird die Bildqualität bei Routine-Ultraschalluntersuchungen im Abdomen verbessert?