The first Soviet experimental multidetector computer-based gamma tomograph to study brain structures with low-energy gamma-radionuclides is presented. Special attention is paid to the engineering approach, the design and operating principles. It is developed to verify new engineering concepts, to optimize design elements, to test the reconstruction algorithm for tomographic images. Main engineering and design parameters are given.
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Eur Spine J
February 2025
Department of Diagnostic and Interventional Neuroradiology, TUM School of Medicine and Health, Klinikum rechts der Isar, Technical University of Munich, Munich, Germany.
Purpose: To evaluate the accuracy of opportunistic measurements of volumetric bone mineral density (vBMD) in intraoperative multi-detector CT (MDCT) scans, using preoperative MDCT as the reference.
Methods: This retrospective, single-center study included 105 patients (mean age: 73 ± 12.6 years, 53 women) who underwent spine surgery for various indications.
Micromachines (Basel)
December 2024
University of Science and Technology of China, Hefei 230026, China.
Defect detection and classification in super-high reflector mirrors and their substrates are crucial for manufacturing laser gyroscope systems. This paper presents a prototype designed to meet the requirements for the reflection and transmission of laser gyroscope mirror substrates. The prototype featured two measurement channels (bright field and dark field) and could detect defects on patterned and unpatterned surfaces.
View Article and Find Full Text PDFFood Chem
February 2025
Key Laboratory of Pathogenesis Mechanism and Control of Inflammatory-Autoimmune Disease of Hebei Province, School of Basic Medical Sciences, Hebei University, Baoding 071000, China; State Key Laboratory of New Pharmaceutical Preparations and Excipients, Hebei University, Baoding 071002, China; Key Laboratory of Medicinal Chemistry and Molecular Diagnosis of Ministry of Education, Hebei University, Baoding 071002, China. Electronic address:
Chromatographia
February 2024
Chemical Sciences Division, National Institute of Standards and Technology (NIST), 100 Bureau Drive, MS 8390, Gaithersburg, MD 20899-8390, USA.
Worldwide polystyrene (PS) production in 2020 was approximately 27 million metric tons, distributed among many nations, making it one of the most heavily imported and exported chemicals. Commercially produced PS usually possesses a broad molar mass distribution, often with a substantial oligomeric component. The latter can significantly affect processing and end-use, in addition to having potentially hazardous health effects and to impacting the polymer's export classification by regulatory agencies.
View Article and Find Full Text PDFAnimals (Basel)
July 2023
Clinic for Diagnostic Imaging, Vetsuisse Faculty, University of Zurich, 8057 Zurich, Switzerland.
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