Boris Mederos

Work place: UACJ/Department of physics and mathematics, Juarez, Mexico

E-mail: boris.mederos@uacj.mx

Website:

Research Interests: Medical Image Computing, Image Processing, Image Manipulation, Image Compression, Pattern Recognition, Medical Informatics

Biography

Boris Jesus Mederos Madrazo received the B.Sc from the Universidad Central Marta Abreu de las Villas, Santa Clara, Cuba, the M.Sc. and Ph.D. degree in Mathematics from the Instituto Nacional de Matemática Puera e Aplicada (IMPA), Rio de Janeiro, Brazil. Fro, 2005 to 2006, he was a post-doc at the Computer Science Department of the University of California at Davis (UC Davis). Dr. Mederos is currently with the Department of Física y Matemáticas at the Universidad Autónoma de Ciudad Juárez. His current teaching and research interests include pattern recognition, machine learning, medical image processing, image restoration, and surface reconstruction.

Author Articles
Super Resolution of PET Images using Hybrid Regularization

By Jose Mejia Boris Mederos Liliana Avelar-Sosa Leticia Ortega Maynez

DOI: https://doi.org/10.5815/ijigsp.2017.01.01, Pub. Date: 8 Jan. 2017

Positron emission tomography images are used to diagnose, staggering, and monitoring several diseases like cancer and Alzheimer, also, this technique is used in clinical research to help to assess the therapeutic and toxic effects of drugs. However, a main drawback of this modality is the poor spatial resolution due to limiting factors such as positron range, instrumentation limits and the allowable doses of radiotracer for administration to patients. These factors also lead to low signal to noise ratios in the images. In this paper, we proposed to increment the resolution of the image and reduce noise by implementing a super resolution scheme, we proposed to use a hybrid regularization consisting of a TV term plus a Tikhonov term to solve the problem of low resolution and heavy noise. By using an anatomical driven scheme to balance between regularization terms we attain a better resolution image with preservation of small structures like lesions and reduced noise without blurring the edges of images. Experimental results and comparisons with other methods of the state-of-the-art show that our proposed scheme produces better preservation of details without adding artifacts when the resolution factor is increased. 

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