Optical processing via high-pass filtering is a well-established means of enhancing image contrast. However, this procedure is energetically inefficient, because the power associated with the low-spatial-frequency components of the image is ordinarily discarded. We demonstrate a means of performing contrast enhancement in an energy efficient manner, by recycling the optical power ordinarily dis...

Molecular imaging is a powerful tool for studying disease progression and potential therapies in animals. Optical coherence tomography (OCT) is an important biomedical imaging modality, filling the niche between ultrasound and microscopy. However, OCT suffers from an inherent lack of molecular contrast (the ability to distinguish a molecule of interest from others). This is because the scatteri...

In this paper, we study and compare various histogram based Magnetic Resonance Imaging(MRI) enhancement techniques.Image enhancement is a processing on an image in order to make it more appropriate for certain applications. It is used to improve the visual effects and the clarity of image or to make the original image more conducive for computer to process. Contrast enhancement changing the pix...

With the continuous development of computer science and technology, the field of Image processing is considered as a very active area of research. Digital Image Processing refers to processing of digital images by means of digital computer. The aim is to produce digital images with better contrast and hidden details. For this purpose, Image Enhancement techniques that process an input image so ...

There is an increasing interest for nanomaterials in biomedical applications and in this work, nanoparticles of gadolinium oxide (Gd2O3) have been investigated as a novel contrast agent for Magnetic Resonance Imaging (MRI). Relaxation properties have been studied in aqueous solutions as well as in cell culture medium and the nanoparticles have been explored as cell labeling agents. The fluoresc...

 Proposed method – Two dimensional histogram equalization(2DHE) • Utilizing contextual information to enhance contrast • Based on contrast observation in image − Improved by increasing gray-level • Including global histogram algorithm − Special case of 2DHE • Automatic parameter selection algorithm contained

parameters that have to be measured in gel dosimetry. However, the resolution in gel is strongly dependant on gel composition. Selection of optimum method in dose response readout and proper values of parameters can result in noise reduction as well as improvement of contrast, and spatial resolution considerably. Materials and Methods: MAGICA polymer gel dosimeters were manufactured and irradia...

Introduction: Bismuth-based nanoparticles having high atomic number and electron density, besides of being utilized as CT contrast agent, stand as a strongly proposed method for dose enhancement in radiotherapy. Embedded nanoparticle in polymer gel dosimeter poses the first step to assess the dose enhancement capability in nanoparticles. To this end, MAGICA gel dosimeter, whic...