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Title: Development and validation of 'AutoRIF': Software for the automated analysis of radiation-induced foci
Authors: McVean, A
Kent, S
Bakanov, A
Hobbs, T
Anderson, RM
Keywords: AutoRIF;Radiation induced foci (RIF);Java-based image analysis system;Markers;DNA damage response (DDR);Radiation-induced double strand breaks (DSBs)
Issue Date: 2012
Publisher: BioMed Central
Citation: Genome Integrity, 3(1): 1-13, Jan 2012
Abstract: Background: The quantification of radiation-induced foci (RIF) to investigate the induction and subsequent repair of DNA double strands breaks is now commonplace. Over the last decade systems specific for the automatic quantification of RIF have been developed for this purpose, however to ask more mechanistic questions on the spatio-temporal aspects of RIF, an automated RIF analysis platform that also quantifies RIF size/volume and relative three-dimensional (3D) distribution of RIF within individual nuclei, is required. Results: A java-based image analysis system has been developed (AutoRIF) that quantifies the number, size/volume and relative nuclear locations of RIF within 3D nuclear volumes. Our approach identifies nuclei using the dynamic Otsu threshold and RIF by enhanced Laplacian filtering and maximum entropy thresholding steps and, has an application ‘batch optimisation’ process to ensure reproducible quantification of RIF. AutoRIF was validated by comparing output against manual quantification of the same 2D and 3D image stacks with results showing excellent concordance over a whole range of sample time points (and therefore range of total RIF/nucleus) after low-LET radiation exposure. Conclusions: This high-throughput automated RIF analysis system generates data with greater depth of information and reproducibility than that which can be achieved manually and may contribute toward the standardisation of RIF analysis. In particular, AutoRIF is a powerful tool for studying spatio-temporal relationships of RIF using a range of DNA damage response markers and can be run independently of other software, enabling most personal computers to perform image analysis. Future considerations for AutoRIF will likely include more complex algorithms that enable multiplex analysis for increasing combinations of cellular markers.
Description: Copyright @ 2012 McVean et al; licensee BioMed Central Ltd. This is an Open Access article distributed under the terms of the Creative Commons Attribution License (, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
This article has been made available through the Brunel Open Access Publishing Fund.
ISSN: 2041-9414
Appears in Collections:Biological Sciences
Computer Science
Brunel OA Publishing Fund
Dept of Computer Science Research Papers
Dept of Life Sciences Research Papers

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