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International Journal of Computer Assisted Radiology and Surgery
Erschienen in: International Journal of Computer Assisted Radiology and Surgery 3/2013

01.05.2013 | Original Article

vPSNR: a visualization-aware image fidelity metric tailored for diagnostic imaging

verfasst von: Claes Lundström

Erschienen in: International Journal of Computer Assisted Radiology and Surgery | Ausgabe 3/2013

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Abstract

Purpose Often, the large amounts of data generated in diagnostic imaging cause overload problems for IT systems and radiologists. This entails a need of effective use of data reduction beyond lossless levels, which, in turn, underlines the need to measure and control the image fidelity. Existing image fidelity metrics, however, fail to fully support important requirements from a modern clinical context: support for high-dimensional data, visualization awareness, and independence from the original data.
Methods We propose an image fidelity metric, called the visual peak signal-to-noise ratio (vPSNR), fulfilling the three main requirements. A series of image fidelity tests on CT data sets is employed. The impact of visualization transform (grayscale window) on diagnostic quality of irreversibly compressed data sets is evaluated through an observer-based study. In addition, several tests were performed demonstrating the benefits, limitations, and characteristics of vPSNR in different data reduction scenarios.
Results The visualization transform has a significant impact on diagnostic quality, and the vPSNR is capable of representing this effect. Moreover, the tests establish that the vPSNR is broadly applicable.
Conclusions vPSNR fills a gap not served by existing image fidelity metrics, relevant for the clinical context. While vPSNR alone cannot fulfill all image fidelity needs, it can be a useful complement in a wide range of scenarios.
Vorheriger Artikel Design, implementation and evaluation of an independent real-time safety layer for medical robotic systems using a force–torque–acceleration (FTA) sensor
Nächster Artikel 3-D shape measurement endoscope using a single-lens system

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Fußnoten
1
In the context of this paper, “meta-data” refers to auxiliary data provided in addition to the imaging data set. These auxiliary data is thus not needed to reconstruct any image data, but are used for image fidelity calculations.
 
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Metadaten
Titel
vPSNR: a visualization-aware image fidelity metric tailored for diagnostic imaging
verfasst von
Claes Lundström
Publikationsdatum
01.05.2013
Verlag
Springer-Verlag
Erschienen in
International Journal of Computer Assisted Radiology and Surgery / Ausgabe 3/2013
Print ISSN: 1861-6410
Elektronische ISSN: 1861-6429
DOI
https://doi.org/10.1007/s11548-012-0792-4

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