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Multi-angle acquisition and 3D composite reconstruction for organ-targeted PET using planar detectors.
Med Phys
December 2024
Department of Physics, Lakehead University, Thunder Bay, Ontario, Canada.
Background: This study investigates a multi-angle acquisition method aimed at improving image quality in organ-targeted PET detectors with planar detector heads. Organ-targeted PET technologies have emerged to address limitations of conventional whole-body PET/CT systems, such as restricted axial field-of-view (AFOV), limited spatial resolution, and high radiation exposure associated with PET procedures. The AFOV in organ-targeted PET can be adjusted to the organ of interest, minimizing unwanted signals from other parts of the body, thus improving signal collection efficiency and reducing the dose of administered radiotracer.
View Article and Find Full Text PDFMulti-Level Feature Fusion in CNN-Based Human Action Recognition: A Case Study on EfficientNet-B7.
J Imaging
December 2024
National Electronic and Computer Technology Center, National Science and Technology Development Agency, Khlong Luang, Pathum Thani 12120, Thailand.
Accurate human action recognition is becoming increasingly important across various fields, including healthcare and self-driving cars. A simple approach to enhance model performance is incorporating additional data modalities, such as depth frames, point clouds, and skeleton information, while previous studies have predominantly used late fusion techniques to combine these modalities, our research introduces a multi-level fusion approach that combines information at early, intermediate, and late stages together. Furthermore, recognizing the challenges of collecting multiple data types in real-world applications, our approach seeks to exploit multimodal techniques while relying solely on RGB frames as the single data source.
View Article and Find Full Text PDFImmune-Related Adverse Events in a Patient Treated with Pembrolizumab: A Case Report from the Point of View of a Geriatrician.
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December 2024
Klinik für Herzchirurgie, Klinikum Nürnberg-Paracelsus Medical University, 90471 Nuremberg, Germany.
We report the case of a 78-year-old female patient who received palliative immunotherapy with pembrolizumab and lenvatinib as a treatment of pulmonary and osseous metastatic endometrial carcinoma. Under this therapy, the patient developed dysphagia, thyroiditis with hypothyroidism, myositis, and myocarditis, which required, due to third-degree AV block, the installation of a pacemaker. The patient received high-dose cortisone therapy, a thyroid hormone substitution, and pyridostigmine for symptom control.
View Article and Find Full Text PDFTrigeminal Pontine Sign: From Imaging to Diseases Beyond Trigeminal Neuralgia.
Diseases
December 2024
Neuroradiology Unit, Azienda Unità Sanitaria Locale-IRCCS di Reggio Emilia, Viale Risorgimento 80, 42123 Reggio Emilia, Italy.
The so-called trigeminal pontine sign has been described as a marker of different diseases, from multiple sclerosis to herpetic infections. First, it has been proposed as linear hyperintensity in the pons on the Magnetic Resonance Imaging (MRI) of patients with multiple sclerosis and trigeminal neuralgia. After these descriptions, it has been reported as incidental findings in the same patients and in patients with HSV or VZV infections.
View Article and Find Full Text PDFA signal processing tool adapted to the periodic biphasic phenomena: the Dynalet transform.
Math Med Biol
December 2024
Escuela de Ingeniería Civil Informática, Universidad de Valparaíso, General Cruz 222, Valparaíso, Chile.
The linear functional analysis, historically founded by Fourier and Legendre (Fourier's supervisor), has provided an original vision of the mathematical transformations between functional vector spaces. Fourier, and later Laplace and Wavelet transforms, respectively defined using the simple and damped pendulum, have been successfully applied in numerous applications in Physics and engineering problems. However the classical pendulum basis may not be the most appropriate in several problems, such as biological ones, where the modelling approach is not linked to the pendulum.
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