title: [Effects of high-strip density anti-scatter grid on image quality and radiation dose].
abstract: OBJECTIVE
  Using a new type of a stationary high strip density grid (13/75) for plain films of the abdomen, the effect was evaluated with regard to quality and patient dose in comparison with an established moving radiographic grid (12/40).
  
  
  METHODS
  The high strip density grid (13/75) was compared with a 12/40 grid using test objects and 100 patients per each grid type for plain films of the abdomen. The examinations were carried out via the screen-film system, speed class (SC) 400. Patients' weight, age and dose measurements were recorded. The image quality was evaluated via a multi-reader study using delineation of anatomical structures and a rating scale (score 1-5 or 1-3).
  
  
  RESULTS
  Both measurements with test objects and patients abdominal plain films showed a decrease in radiation dose of 17% using the 13/75 grid, and 24%, respectively. The delineation of 4 out of 7 anatomical structures was slightly reduced with the new high strip density grid (maximum score reduction: 0.4), the image contrast, as well as the radiologists' subjective rating.
  
  
  CONCLUSIONS
  Apart from an acceptable loss in image quality compared with the 12/40 grid, the new high strip density grid (13/ 75) enables a clear reduction in radiation dose.
authors.affiliation: Klinik für Diagnostische Radiologie und Neuroradiologie, Zentralklinikum Augsburg.
authors.forename: G
authors.initials: G
authors.lastname: Wamser
authors.forename: W
authors.initials: W
authors.lastname: Maier
authors.forename: H
authors.initials: H
authors.lastname: Aichinger
authors.forename: K
authors.initials: K
authors.lastname: Bohndorf
mesh_terms: D000328:Adult; D000368:Aged; D005069:Evaluation Studies as Topic; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D009010:Monte Carlo Method; D019047:Phantoms, Imaging; D011829:Radiation Dosage; D011856:Radiographic Image Enhancement; D011859:Radiography / Q000295:instrumentation* / Q000379:methods; D011860:Radiography, Abdominal; D012542:Scattering, Radiation; D014963:X-Ray Intensifying Screens