Search Results - "Maynez, Leticia"

Noise Reduction in Small Animal PET Images Using a Variational Non-Convex Functional by Mejia, Jose, Mederos, Boris, Mollineda, Ramon A., Ortega Maynez, Leticia

“…Positron emission tomography (PET) imaging is widely used in nuclear medicine. However, data acquired by a PET system are generally contaminated with heavy…”
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Denoising of high resolution small animal 3D PET data using the non-subsampled Haar wavelet transform by Ochoa Domínguez, Humberto de Jesús, Máynez, Leticia O., Vergara Villegas, Osslan O., Mederos, Boris, Mejía, José M., Cruz Sánchez, Vianey G.

“…PET allows functional imaging of the living tissue. However, one of the most serious technical problems affecting the reconstructed data is the noise,…”
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Performance analysis of different PSF shapes for the quad-HIDAC PET submillimetre resolution recovery by Ortega Máynez, Leticia, de Jesús Ochoa Domínguez, Humberto, Osiris Vergara Villegas, Osslan, Gordillo, Nelly, Guadalupe Cruz Sánchez, Vianey, David Gutiérrez Casas, Efrén

“…In pre-clinical applications, it is quite important to preserve the image resolution because it is necessary to show the details of structures of small…”
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Wavelet-based regularisation for background correction within the sub-millimeter 3D MLEM list-mode reconstruction process for high resolution small animal PET data by Ortega Maynez, Leticia, Ochoa Domingiuez, Humberto, Vergara Villegas, Osslan

“…The measure data obtained from the acquiring PET system tend to be very noisy, since the limitation of the current instrumentation, detector efficiency, as…”
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Noise Reduction in Small-Animal PET Images Using a Multiresolution Transform by Mejia, Jose M., Ochoa Dominguez, Humberto De Jesus, Vergara Villegas, Osslan Osiris, Ortega Maynez, Leticia, Mederos, Boris

“…In this paper, we address the problem of denoising reconstructed small animal positron emission tomography (PET) images, based on a multiresolution approach…”
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The Nonsubsampled Contourlet Transform for Enhancement of Microcalcifications in Digital Mammograms by Muñoz, Jose Manuel Mejía, de J. Ochoa Domínguez, Humberto, Villegas, Osslan Osiris Vergara, Sánchez, Vianey Guadalupe Cruz, Maynez, Leticia Ortega

“…Microcalcifications detection plays a crucial role in the early detection of breast cancer. The enhancement of the mammographic images is one of the most…”
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Wavelet-based regularization and edge preservation for submillimetre 3D list-mode reconstruction data from a high resolution small animal PET system by de Jesús Ochoa Domínguez, Humberto, Máynez, Leticia Ortega, Villegas, Osslan Osiris Vergara, Castillo, Nelly Gordillo, Sánchez, Vianey Guadalupe Cruz, Casas, Efrén David Gutiérrez

“…The data obtained from a PET system tend to be noisy because of the limitations of the current instrumentation and the detector efficiency. This problem is…”
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Wavelet-based regularization strategies within the 3D list-mode ML-EM reconstruction process, for high resolution small animal PET data by Maynez, Leticia, de Jesus Ochoa Dominguez, Humberto, Vergara Villegas, Osslan Osiris, Cruz Sanchez, Vianey Guadalupe, Munoz, Jose Manuel Mejia

“…The measurements obtained from the acquiring PET system tend to be very noisy, since randoms and scatter contamination events as well as detector efficiency…”
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A fuzzy computer aided diagnosis system using breast thermography by Calderon-Contreras, Jorge D., Chacon-Murguia, Mario I., Villalobos-Montiel, Adrian J., Ortega-Maynez, Leticia

“…In this article, a novel model of computer aided diagnosis (CAD) system through breast thermography is proposed with the purpose of diagnosing breast cancer…”
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Background correction strategies for list-mode submillimetre 3D image reconstruction algorithm applied to the high resolution Quad-HIDAC PET system by Maynez, A.L.O., Kosters, B.T., Ochoa, C.H., Wubbeling, D.F., Schafers, E.K.

“…Two novel methods for the inclusion of the background estimation within the list-mode reconstruction process are presented. The additive and subtractive…”
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List-mode detector scatter estimation method with potential for real-time implementation in high resolution PET imaging by Ortega Maynez, Leticia, Kosters, Thomas, Uhlendorf, Volkmar, Wubbeling, Frank, Schafers, Klaus, Reader, Andrew J.

“…A novel method for the estimation of list-mode detector scatter is proposed, which can in principle be implemented in real-time during raw PET data…”
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Region-based Efficiency Correction for the High-Resolution quad-HIDAC PET scanner by Maynez, L.O., Julyan, P.J., Hastings, D.L., Reader, A.J.

“…The very high resolution quad-HIDAC PET scanner has four detector banks each with four planar high density avalanche chambers, capable of collecting billions…”
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Image Reconstruction and Data Correction for Very High Resolution Pre-Clinical Positron Emission Tomography with the Quad HIDAC PET System by Ortega Maynez, Leticia

“…In positron emission tomography (PET) imaging, positron-emitting isotopes are injected into a patient's body to provide functional images. However, the…”
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ML-EM reconstruction model including total variation for low dose PET high resolution data by Chavez-Rivera, Lucia B., Ortega-Maynez, Leticia, Mejia, Jose, Mederos, Boris

“…Data acquired through the PET system tend to be very noisy, partly due to low radiation doses. In this paper, a new reconstruction strategy based on a…”
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Multi-frame super-resolution for mixed Gaussian and impulse noise based on blind inpainting by Silva, Ismael, Mederos, Boris, Ortega-Maynez, Leticia, Cabrera, Sergio

“…This paper proposes a robust multi-frame super-resolution algorithm to produce a high-resolution image. In merging the non-redundant information from shifted,…”
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Determination of temperature in neonates based in a face IR thermography image segmentation algorithm by Chavez Rivera, Lucia B., Maynez, Leticia Ortega, Ambrosio Lazaro, Roberto C.

“…The temperature is a factor for the health of a newborn. In this paper, an algorithm for automatic face segmentation in digital thermal images of is proposed…”
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Lung nodule classification in frequency domain using support vector machines by Orozco, H. M., Villegas, O. O. V., Maynez, L. O., Sanchez, V. G. C., de Jesus Ochoa Dominguez, H.

“…In this paper a computational alternative to classify lung nodules inside CT thorax images in the frequency domain is presented. After image acquisition, a…”
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