28 June 2001 Comparison of the image quality produced by two examination stands for thoracic imaging equipped with a CsI/a-Si flat-panel detector respective to a transparent imaging plate with both-side reading using an ROC analysis
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Abstract
The image quality produced by two examination stands designed for thoracic imaging was evaluated. One of the two stands was using a CsI/a-Si flat panel detector (FD) as the imaging system. The other system was using an imaging plate with a transparent support which is read out from both-sides (tIP). 75 images of an anthropomorphic thorax phantom were produced with both examination stands and on a screen-film-system. Different structures - representing pathological alterations - have been superimposed to the phantom. An ROC analysis of these images has been done. The structures simulating different pathology have been evaluated with respect to the frequency components of their X-ray intensity pattern. This was done by using the method presented at the SPIE 'Medical Imaging' conferences 1999 and 2000 for investigating the normal anatomy. The simulated structures represent different pathological structures sufficiently. The frequency range of their X-ray intensity pattern is in the same order as that found for anatomical structures in the lung. The performed ROC-analysis shows very promising results for both detectors. For both detectors there will probably be a potential to reduce the X-ray dose per exposure without loosing relevant diagnostic quality. This potential is slightly higher for the FD corresponding to its slightly higher DQE at lower frequencies.
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Christoph Hoeschen, Steffen Reissberg, Olaf Effenberger, Andreas Fessel, Ulf Redlich, Cordula Scherlach, Wilfried Doehring, "Comparison of the image quality produced by two examination stands for thoracic imaging equipped with a CsI/a-Si flat-panel detector respective to a transparent imaging plate with both-side reading using an ROC analysis", Proc. SPIE 4320, Medical Imaging 2001: Physics of Medical Imaging, (28 June 2001); doi: 10.1117/12.430892; https://doi.org/10.1117/12.430892
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