Juan Ruiz‐Alzola

ORCID: 0000-0002-3545-2328
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About
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Research Areas
  • Medical Image Segmentation Techniques
  • Advanced Neuroimaging Techniques and Applications
  • Ultrasound Imaging and Elastography
  • Advanced MRI Techniques and Applications
  • Infrared Thermography in Medicine
  • Image Retrieval and Classification Techniques
  • Image and Signal Denoising Methods
  • Wireless Body Area Networks
  • 3D Shape Modeling and Analysis
  • Diabetic Foot Ulcer Assessment and Management
  • Medical Imaging Techniques and Applications
  • Robotics and Sensor-Based Localization
  • Advanced Vision and Imaging
  • Spectroscopy Techniques in Biomedical and Chemical Research
  • Remote-Sensing Image Classification
  • Digital Image Processing Techniques
  • Advanced Image and Video Retrieval Techniques
  • Surgical Simulation and Training
  • Photoacoustic and Ultrasonic Imaging
  • AI in cancer detection
  • Microwave Imaging and Scattering Analysis
  • Anatomy and Medical Technology
  • Ultrasound and Hyperthermia Applications
  • Medical Imaging and Analysis
  • Radiomics and Machine Learning in Medical Imaging

Universidad de Las Palmas de Gran Canaria
2009-2024

Instituto de Astrofísica de Canarias
2019-2023

Instituto Tecnológico de Canarias
2004-2009

Harvard University
2000-2006

Brigham and Women's Hospital
2000-2006

Universidad de Valladolid
2005

Hospital Universitario de Gran Canaria Doctor Negrín
2002-2003

Boston University
2003

Universidad Politécnica de Madrid
1996

The increasing challenges of agricultural processes and the growing demand for food globally are driving industrial agriculture sector to adopt concept 'smart farming'. Smart farming systems, with their real-time management high level automation, can greatly improve productivity, safety, efficiency in agri-food supply chain. This paper presents a customized smart system that uses low-cost, low-power, wide-range wireless sensor network based on Internet Things (IoT) Long Range (LoRa)...

10.3390/s23052725 article EN cc-by Sensors 2023-03-02

In this report we evaluate an image registration technique that can improve the information content of intraoperative data by deformable matching preoperative images. study, pretreatment 1.5 tesla (T) magnetic resonance (MR) images prostate are registered with 0.5 T The method involves rigid and nonrigid using biomechanical finite element modeling. Preoperative MR imaging is conducted patient supine, endorectal coil, while intraoperatively, in lithotomy position a rectal obturator place. We...

10.1118/1.1414009 article EN Medical Physics 2001-12-01

Data scarcity is a common and challenging issue when working with Artificial Intelligence solutions, especially those including Deep Learning (DL) models for tasks such as image classification. This particularly relevant in healthcare scenarios, which data collection requires long-lasting process, involving specific control protocols. The performance of DL usually quantified by different classification metrics, may provide biased results, due to the lack sufficient data. In this paper, an...

10.1109/access.2022.3225107 article EN cc-by IEEE Access 2022-01-01

Thermography enables non-invasive, accessible, and easily repeated foot temperature measurements for diabetic patients, promoting early detection regular monitoring protocols, that limit the incidence of disabling conditions associated with disorders. The establishment this application into standard care protocols requires to overcome technical issues, particularly sole segmentation. In work we implemented evaluated several segmentation approaches which include conventional Deep Learning...

10.3390/s21030934 article EN cc-by Sensors 2021-01-30

Diabetes mellitus presents a high prevalence around the world. A common and long-term derived complication is diabetic foot ulcers (DFUs), which have global of roughly 6.3%, lifetime incidence up to 34%. Infrared thermograms, covering entire plantar aspect both feet, can be employed monitor risk developing ulcer, because patients exhibit an abnormal pattern that may indicate disorder. In this study, publicly available INAOE dataset composed thermogram images healthy subjects was extract...

10.3390/s23020757 article EN cc-by Sensors 2023-01-09

Diabetic foot ulcers represent the most frequently recognized and highest risk factor among patients affected by diabetes mellitus. The associated recurrent rate is high, amputation of or lower limb often required due to infection. Analysis infrared thermograms covering entire plantar aspect both feet considered an emerging area research focused on identifying at early stage underlying conditions that sustain skin tissue damage prior onset superficial wounds. identification disorders using...

10.3390/biomedicines11123209 article EN cc-by Biomedicines 2023-12-02

In this article, a new efficient and robust approach—the high-resolution microwave imaging system—for early breast cancer diagnosis is presented. The core concept of the proposed approach to employ combination newly delay-and-sum (DAS) algorithm specific absorption rate (SAR) parameter provide high image quality tumors, along with fast processing. enhances tumor response by altering referring distance between antenna in conventional DAS matrices. This adjustment entails much clearer...

10.3390/jimaging8100264 article EN cc-by Journal of Imaging 2022-09-28

The aim of this work is to provide a methodology model the dielectric properties human tissues based on phantoms prepared with an aqueous solution, in semi-solid form, by using off-the-shelf components. Polyvinyl alcohol cryogel (PVA-C) has been employed as novel gelling agent fabrication for microwave applications wide frequency range, from 500 MHz 20 GHz. Agar-based and deionized water have also manufactured comparison purposes. Mathematical models dependent sucrose concentration are...

10.1371/journal.pone.0219997 article EN cc-by PLoS ONE 2019-07-25

Abstract A precise and thorough methodology is presented for the design fabrication of bimodal phantoms to be used in medical microwave ultrasound applications. Dielectric acoustic properties human soft tissues were simultaneously mimicked. The fabricated using polyvinyl alcohol cryogel (PVA-C) as gelling agent at a 10% concentration. Sucrose was employed control dielectric spectrum, whereas cellulose scatterer ultrasound. For microwaves, mathematical model extracted calculate complex...

10.1038/s41598-020-77368-5 article EN cc-by Scientific Reports 2020-11-23

This communication presents an interactive tool performing adaptive speckle filtering so that the medical expert who runs algorithm has permanent control over output and guides process towards obtaining enhanced images agree to his/her subjective quality criteria. The core of is Interactive Genetic Algorithm adapts online coefficients a general order statistics filter. Preliminary results show potential method in comparison other powerful reduction filters on test bed comprising obstetrics...

10.1109/tbme.2007.897833 article EN IEEE Transactions on Biomedical Engineering 2007-12-20

This work presents a revision of four different registration methods for thermal infrared and visible images captured by camera-based prototype the remote monitoring diabetic foot. uses low cost off-the-shelf available sensors in spectra. Four (Geometric Optical Translation, Homography, Iterative Closest Point, Affine transform with Gradient Descent) have been implemented analyzed obtained from both sensors. All algorithms’ performances were evaluated using Simultaneous Truth Performance...

10.3390/s21072264 article EN cc-by Sensors 2021-03-24
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