Corrosion detection is very important in the oil industry to prevent costly consequences of damage from it. There are some techniques for detecting corrosion in pipelines. Backscatter radiography is an inspection technique for cases where the inspection should only be carried out in one side. In this paper, the backscatter effect for the radiography and in-situ detection of corrosion inside the pipelines (e.g. a wellbore) was studied. The simulation process allows determining the correctness and efficiency of the backscatter radiography technique before applying in a real system. Furthermore, the overall design characteristics of a system can be found by analyzing the effects of specific factors such as photon energy and location of detectors during the simulation process. The Monte Carlo calculation based simulation was studied to understand the impact of this technique on corrosion detection in a wellbore. The results showed that this technique is viable and fast and can be applied to find corrosion location and its severity inside a wellbore.
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http://dx.doi.org/10.1016/j.apradiso.2018.12.026 | DOI Listing |
Front Endocrinol (Lausanne)
December 2024
Department of Rheumatology and Clinical Immunology, Charité - Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin and Humboldt- Universität zu Berlin, Berlin, Germany.
Introduction: Diabetes mellitus (DM) is a chronic metabolic disorder that increases fragility fracture risk. Conventional DXA-based areal bone mineral density (aBMD) assessments often underestimate this risk. Cortical Backscatter (CortBS) ultrasound, a radiation-free technique, non-invasively analyzes cortical bone's viscoelastic and microstructural properties.
View Article and Find Full Text PDFSci Rep
December 2024
Department of Artificial Intelligence Convergence, Chonnam National University, Gwangju, 61186, Republic of Korea.
Polarization-sensitive optical coherence tomography (PS-OCT) measures the polarization state of backscattered light from tissues and provides valuable insights into the birefringence properties of biological tissues. Contrastive unpaired translation (CUT) was used in this study to generate a synthetic PS-OCT image from a single OCT image. The challenges related to extensive data requirements relying on labeled datasets using only pixel-wise correlations that make it difficult to efficiently regenerate the periodic patterns observed in PS-OCT images were addressed.
View Article and Find Full Text PDFPlacenta
December 2024
Department of Electrical and Computer Engineering, University of British Columbia, Vancouver, British Columbia, Canada.
Introduction: Placenta-mediated diseases are associated with structural changes in the placenta. Quantitative Ultrasound (QUS) imaging measures the acoustic properties of the tissue, which are correlated to the underlying tissue structure. We aimed to develop and validate a diagnostic prediction model using QUS measurements for pre-eclampsia (PE) and small-for-gestational-age (SGA) fetuses/neonates.
View Article and Find Full Text PDFRadiat Prot Dosimetry
November 2024
Nuclear and Ionizing Radiation Metrology Section, Office of Atoms for Peace, Bangkok 10900, Thailand.
Interventional radiology (IR) provides significant advancements in diagnostic and therapeutic procedures, yet concerns persist regarding radiological risks such as erythema, burns, and epilation. Direct dose measurements observed difficulties regarding the perturbation of the detector probe in X-ray images during fluoroscopy-guided procedures, high-cost expenses, and non-compliant patients. This study aims to develop a statistical-based model for estimating entrance skin dose (ESD) in body IR procedures using patient radiation-dose recording data.
View Article and Find Full Text PDFBiomater Adv
February 2025
Department of Osteology and Biomechanics, University Medical-Center Hamburg-Eppendorf, Hamburg, Germany; Interdisciplinary Competence Center for Interface Research (ICCIR), Hamburg, Germany; Mildred Scheel Cancer Career Center Hamburg, University Cancer Center Hamburg, University Medical-Center Hamburg-Eppendorf, Hamburg, Germany. Electronic address:
Bone metastases related to breast and prostate cancer present with multiple challenges and skeletal related events like fragility fractures impair the quality of life of the patients significantly. To determine local alterations in bone material quality with bone metastasis, we subjected murine tibial specimens, generated after intratibial injections of either RM1 prostate cancer cells or EO771 breast cancer cells into male and female mice respectively, to high-resolution imaging modalities. Small and wide-angle X-ray scattering showed unaltered mineral characteristics in the more osteosclerotic prostate cancer model, while the quantification of calcium weight percentage via backscattered electron microscopy determined minor differences along the perilacunar bone matrix.
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