ITERATIVE SCATTER CORRECTION FOR GRID-LESS BEDSIDE CHEST RADIOGRAPHY: PERFORMANCE FOR A CHEST PHANTOM.
The aim of this work was to experimentally compare the contrast improvement factors (CIFs) of a newly developed software-based scatter correction to the CIFs achieved by an antiscatter grid. To this end, three aluminium discs were placed in the lung, the retrocardial and the abdominal areas of a thorax phantom, and digital radiographs of the phantom were acquired both with and without a stationary grid. The contrast generated by the discs was measured in both images, and the CIFs achieved by grid usage were determined for each disc. Additionally, the non-grid images were processed with a scatter correction software. The contrasts generated by the discs were determined in the scatter-corrected images, and the corresponding CIFs were calculated. The CIFs obtained with the grid and with the software were in good agreement. In conclusion, the experiment demonstrates quantitatively that software-based scatter correction allows restoring the image contrast of a non-grid image in a manner comparable with an antiscatter grid.
Diagnostic X-Ray, Philips Healthcare DMC GmbH, Röntgenstraße 24, 22335 Hamburg, Germany detlef.mentrup@philips.com.
Detlef
D
Mentrup
Diagnostic X-Ray, Philips Healthcare DMC GmbH, Röntgenstraße 24, 22335 Hamburg, Germany.
Sascha
S
Jockel
Philips Research, High Tech Campus 34, 5656 AE Eindhoven, The Netherlands.
Bernd
B
Menser
Diagnostic X-Ray, Philips Healthcare DMC GmbH, Röntgenstraße 24, 22335 Hamburg, Germany.
Ulrich
U
Neitzel
D000465:Algorithms; D016477:Artifacts; D006801:Humans; D019047:Phantoms, Imaging; D019095:Point-of-Care Systems; D011856:Radiographic Image Enhancement / Q000295:instrumentation / Q000379:methods*; D011857:Radiographic Image Interpretation, Computer-Assisted / Q000295:instrumentation / Q000379:methods*; D013902:Radiography, Thoracic / Q000295:instrumentation / Q000379:methods*; D015203:Reproducibility of Results; D012542:Scattering, Radiation; D012680:Sensitivity and Specificity; D012984:Software; D014965:X-Rays