Analog Non-Linear Transformation-Based Tone Mapping for Image Enhancement in C-arm CT

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Details zur Publikation

Autor(en): Shi L, Berger M, Bier B, Söll C, Röber J, Fahrig R, Eskofier B, Maier A, Maier J
Jahr der Veröffentlichung: 2016


Abstract


Flat-Panel C-arm Computed Tomography (CT) suffers from pixel saturation due to the detector’s limited dynamic range. We describe a novel approach to analog, non-linear tone mapping (TM) for preventing detector saturation. An analog TM operator (TMO) applies a non-linear transformation in a CMOS sensor and its inverse TMO based on 14-bit digital raw data. This is done in order to prevent overexposure and to enhance image quality to 32 bits. The method was applied to the cases of low-contrast head imaging and to that of imaging both knees. Cone-beam projection data with and without overexposure was simulated for a 200° short-scan of the knees and a 360° full-scan of a Forbild head phantom. The results show an increased correlation coefficient of 0.99 compared to 0.96 for overexposed knee data and a higher low-contrast visibility (CC=0.99) compared to linear quantization (CC=0.97).



FAU-Autoren / FAU-Herausgeber

Berger, Martin
Lehrstuhl für Informatik 5 (Mustererkennung)
Bier, Bastian
Lehrstuhl für Informatik 5 (Mustererkennung)
Eskofier, Björn Prof. Dr.
Stiftungs-Juniorprofessur für Sportinformatik (Digital Sports)
Maier, Jennifer
Lehrstuhl für Informatik 5 (Mustererkennung)
Maier, Andreas Prof. Dr.-Ing.
Lehrstuhl für Informatik 5 (Mustererkennung)
Röber, Jürgen
Lehrstuhl für Technische Elektronik
Shi, Lan
Lehrstuhl für Technische Elektronik
Söll, Christopher
Lehrstuhl für Technische Elektronik


Zitierweisen

APA:
Shi, L., Berger, M., Bier, B., Söll, C., Röber, J., Fahrig, R.,... Maier, J. (2016). Analog Non-Linear Transformation-Based Tone Mapping for Image Enhancement in C-arm CT. Strasbourg, France.

MLA:
Shi, Lan, et al. "Analog Non-Linear Transformation-Based Tone Mapping for Image Enhancement in C-arm CT." Proceedings of the IEEE Medical Imaging Conference (MIC), Strasbourg, France 2016.

BibTeX: 

Zuletzt aktualisiert 2018-19-04 um 03:50