The measurement of dose distributions in clinical brachytherapy, for the purpose of quality control, commissioning or dosimetric audit, is challenging and requires development. Radiochromic film dosimetry with a commercial flatbed scanner may be suitable, but careful methodologies are required to control various sources of uncertainty. Triple-channel dosimetry has recently been utilized in exte...

In this paper, a novel individual source scanner identification scheme is proposed. The scheme uses traces of dust, dirt, and scratches over scanner platen on scanned images to characterize a source scanner. The efficacy of the proposed scheme is substantiated with experimental analysis. The robustness of the scheme to the JPEG compression is also investigated. Experimental results show that pr...

High-resolution scans of plant cuttings were made for a identification course to create additional study resources. Stems, flowers, leaves, and other parts with identifiable features cut placed on high-quality flatbed scanner. A framework suspended black background cloth above the dark scanning environment, it was far enough away from scanner glass so as not appear in scanned image. Botanical c...

To report a study of the use of GAFCHROMIC EBT radiochromic film (RCF) digitized with a commercially available flatbed document scanner for accurate and reliable all-purpose two-dimensional (2D) absolute dosimetry within a clinical environment. We used a simplified methodology that yields high-precision dosimetry measurements without significant postirradiation correction. The Epson Expression ...

Abstract. Studying precipitation at very high latitudes is difficult because of the harsh environmental conditions that limit external activity humans and instruments, especially in polar winter. The direct monitoring ice crystal habits size distribution Antarctic important for validation algorithms used retrieving from ground-based satellite-borne radar instruments improvement climatological m...

iii Acknowledgements iv List of Figures vi List of Tables vi

When one uses USAF target to calibrate the resolution of an imaging system, the periodicity of the smallest resolvable line should be used to define the limit. However, in the original paper, the line width of the resolution target was used to characterize the resolution of our microscope system, resulting in an overestimation of the performance of the imaging system. In this erratum, we correc...

Digital images can be captured or generated by a variety of sources including digital cameras and scanners. In many cases it is important to be able to determine the source of a digital image. This paper presents methods for authenticating images that have been acquired using flatbed desktop scanners. The method is based on using the pattern noise of the imaging sensor as a fingerprint for the ...