Effects of Varying Filter Kernel Sizes on the Image Quality of Interstitial Lung Diseases

Author:

Müller R.-D.1,Herting D.1,Hirche H.2,John V.1,Buddenbrock B.1,Gocke P.1,Wiebringhaus R.1,Braunschweig R.3,Voss M.1,Mohnke M.4,Konietzko N.5

Affiliation:

1. Central Radiology Diagnostic Institute, Biometry and Epidemiology, University Hospital, Essen

2. Institute for Medical Information, Biometry and Epidemiology, University Hospital, Essen

3. Istitute for Radiological Diagnostics, Tübingen University, Tübingen

4. Clinic for Transplantation of Bone Marrow

5. Pneumology Center, The Ruhrland Clinic, University Hospital, Essen, Germany.

Abstract

Purpose: The aim of the study was to optimize the postprocessing of digital luminescence radiographs of interstitial infiltrates of the lung. Material and Methods: Ninety-seven patients with established diseases of the lung parenchyma were examined: 514 pathological details were investigated, using a 200-speed screen-film system and a storage phosphor plate. In digital postprocessing, the size of the filter kernel (S) varied between S 5 and S 70. Based upon 32896 individual evaluations, the image quality was evaluated in multifactorial variance analyses. Results: The digital standards were significantly inferior to the tested screen-film system. The large filter kernel S 70 and the small filter kernels S 5 and S 10, as well as an algorithm for edge enhancement, showed selective advantages in the depiction of nodular or small linear structures. For micronodular and linear structures, kernel sizes of S 20 and S 40 produced equally good results (p>0.05). Conclusion: Whenever optimized postprocessing is involved, storage phosphor radiography is equal to a modern screen-film system and can be substituted for the latter without any loss of image quality; this is especially valid for the imaging of interstitial infiltrates of the lung.

Publisher

SAGE Publications

Subject

Radiology Nuclear Medicine and imaging,General Medicine,Radiological and Ultrasound Technology

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