Towards A Pixel-Level Reconfigurable Digital Beamforming Core for Ultrasound Imaging

Ultrasound (US) imaging systems typically employ a single beamforming scheme which is the delay and sum (DAS) beamforming due to its reduced complexity. However, DAS results in images with limited resolution and contrast. The limitations of DAS have been overcome by, delay multiply and sum (DMAS) beamforming, making it especially preferable in cases where finer image details are required in larger depth of scans for an accurate diagnosis. But, DMAS is confined to transducer frequencies where the generated harmonics also fall in the processable frequency range of the US system. However, if US systems could provide the flexibility to reconfigure beamforming considering the restrictions of each beamforming scheme, it is possible to select the best beamforming according to the clinical requirement and system constraints. This work is a fundamental step towards enabling reconfigurable beamforming for on-the-fly selection among the DAS and DMAS beamforming schemes, with low reconfiguration overhead, specifically for each imaging scenario to aid better diagnosis. Two novel architectures are proposed, that reconfigures between DAS and DMAS beamforming as a function of transducer’s center frequency with minimum additional computational overhead. The implementation results of the proposed architectures on xc7z010clg400-1 FPGA are reported. The possibilities of pixel-level beamforming reconfigurability, where the different tissue regions are beamformed with either DAS or DMAS are ...
Source: IEEE Transactions on Biomedical Circuits and Systems - Category: Biomedical Engineering Source Type: research

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Authors: Jiang ZZ, He C, Wang DQ, Shen HL, Sun JL, Gan WN, Lu JY, Liu XT Abstract In December 2019, an outbreak of coronavirus infection emerged in Wuhan, Hubei Province of China, which is now named Coronavirus Disease 2019 (COVID-19). The outbreak spread rapidly within mainland China and globally. This paper reviews the different imaging modalities used in the diagnosis and treatment process of COVID-19, such as chest radiography, computerized tomography (CT) scan, ultrasound examination, and positron emission tomography (PET/CT) scan. A chest radiograph is not recommended as a first-line imaging modality for COVI...
Source: Medical Science Monitor - Category: Research Tags: Med Sci Monit Source Type: research
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Source: Revista Espanola de Cirugia Oral y Maxilofacial - Category: ENT & OMF Source Type: research
We present a case of a 34-year-old woman referred to the Ophthalmology Department with visual discomfort, headaches, and pulsatile tinnitus of two months onset. In the physical examination there was bilateral blurring of the optic disc margin with absence of spontaneous venous pulsation. The diagnosis of idiopathic intracranial hypertension was made by lumbar puncture with the measurement of the opening pressure, and due to the findings of the magnetic resonance scan of the brain and orbits. The optic nerve drusen was an incidental finding in an optical coherence tomography angiography, which would later be confirmed with ...
Source: Archivos de la Sociedad Espanola de Oftalmologia - Category: Opthalmology Tags: Arch Soc Esp Oftalmol Source Type: research
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Source: Guardian Unlimited Science - Category: Science Authors: Tags: Medical research Coronavirus outbreak Heart disease Health Heart attack World news Society Science Source Type: news
There is growing evidence regarding the imaging findings of Coronavirus Disease 2019 (COVID-19), in chest X-ray and Computed Tomography scan (CT). At this moment, the role of Lung Ultrasonography (LUS) has yet to be explored. The main purpose of this study is to evaluate the correlation between LUS findings and chest CT in confirmed (positive RT-PCR) or clinically highly suspicious (dyspnea, fever, myasthenia, gastrointestinal symptoms, dry cough, ageusia or anosmia) of COVID-19 patients. This prospective study was carried out in the emergency department (ED), confirmed or clinically highly suspicious COVID-19 patients wer...
Source: Ultrasound in Medicine and Biology - Category: Radiology Authors: Source Type: research
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Source: Indian Journal of Radiology and Imaging - Category: Radiology Authors: Source Type: research
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Source: Scandinavian Journal of Gastroenterology - Category: Gastroenterology Tags: Scand J Gastroenterol Source Type: research
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Source: International Journal of Computer Assisted Radiology and Surgery - Category: Intensive Care Source Type: research
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Source: Acta Obstetricia et Gynecologica Scandinavica - Category: OBGYN Authors: Tags: SYSTEMATIC REVIEW Source Type: research
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Source: Acta Chirurgica Belgica - Category: Surgery Tags: Acta Chir Belg Source Type: research
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