Liliana Avelar-Sosa

Work place: UACJ/Department of industrial and manufacturing engineering, Juarez, Mexico

E-mail: liliana.avelar@uacj.mx

Website:

Research Interests: Models of Computation, Theory of Computation, Computer systems and computational processes

Biography

Liliana Avelar-Sosa, received a Ph. D of S c i e n c e i n E n g i n e e r i n g f r o m t h e Autonomous University of Ciudad Juarez (Mexico). Her main research areas are related to the modeling of the supply chain and logistics, in addition to improving production processes. She has collaborated on projects in the area of supply chain and logistics in manufacturing and urban logistics projects at the National University of Colombia, also she has a collaboration on projects related to the super resolution of images. She has published in scientific journals, international conferences and congresses so is a researcher recognized by the National System of Researchers of the National Council of Science and Technology of Mexico (CONACYT). She is currently Research Professor in the Department of Industrial and Manufacturing Engineering at the Autonomous University of Ciudad Juarez.

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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