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Journal articles on the topic 'Diffusion CT'

Author: Grafiati

Published: 25 May 2024

Last updated: 31 July 2025

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1

Guo, Huimin, Zhiwen Zhang, Li Wang, et al. "Diagnostic Significance of 18F-FDG PET/CT Imaging Coupled with Magnetic Resonance Imaging of the Entire Body for Bone Metastases." Contrast Media & Molecular Imaging 2022 (September 27, 2022): 1–7. http://dx.doi.org/10.1155/2022/7717398.

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Objective. To see if 18F-fluorodeoxyglucose positron emission tomography/computed tomography (18F-FDG PET/CT) imaging paired with MR diffusion imaging can help doctors diagnose bone metastases. Methods. From September 2020 to December 2021, a total of 30 individuals with probable bone metastases were recruited for the trial. With an average interval of four days, MAGNETIC resonance whole-body diffusion imaging (MR whole-body diffusion imaging) was performed on each of the 30 patients who had 18F-FDG PET/CT. The SUVmax values of the group with bone metastases were compared to those of the group

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Jee, Jongmin, Won Chang, Euyoung Kim, and Kyongjoon Lee. "Accelerating Diffusion: Task-Optimized latent diffusion models for rapid CT denoising." Computers in Biology and Medicine 194 (August 2025): 110517. https://doi.org/10.1016/j.compbiomed.2025.110517.

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Sigismondi, Paolo. "Exploring Translation Gaps: The Untranslatability and Global Diffusion of “Cool”." Communication Theory 28, no. 3 (2018): 292–310. http://dx.doi.org/10.1093/ct/qtx007.

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Okazumi, Shinichi, Gaku Ohira, Koichi Hayano, Tomoyoshi Aoyagi, Shunsuke Imanishi, and Hisahiro Matsubara. "Novel Advances in Qualitative Diagnostic Imaging for Decision Making in Multidisciplinary Treatment for Advanced Esophageal Cancer." Journal of Clinical Medicine 13, no. 2 (2024): 632. http://dx.doi.org/10.3390/jcm13020632.

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Background: Recently, neoadjuvant therapy and the succeeding surgery for advanced esophageal cancer have been evaluated. In particular, the response to the therapy has been found to affect surgical outcomes, and thus a precise evaluation of treatment effect is important for this strategy. In this study, articles on qualitative diagnostic modalities to evaluate tumor activities were reviewed, and the diagnostic indices were examined. Methods: For prediction of the effect, perfusion CT and diffusion MRI were estimated. For the histological response evaluation, perfusion CT, diffusion-MRI, and FD

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Chae, Baek, Chang shik Choi, Seung-Hwa Kang, and Yun-Cheol Heo. "Diffusion of television, wax and wane of community and family bond." Communication Theories 14, no. 4 (2018): 139–82. http://dx.doi.org/10.20879/ct.2018.14.4.139.

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Kim, Su-Beom, Soo Jin Song, Yeong Hyoen Yoo, and Dar Oh Lim. "International Comparative Analysis of Advanced Diagnostic Imaging Equipment Demand Characteristics Using the Bass Diffusion Model." Journal of Health Informatics and Statistics 49, no. 1 (2024): 27–34. http://dx.doi.org/10.21032/jhis.2024.49.1.27.

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Objectives: This paper proposed the direction of future supply and demand management policies through demand prediction and demand characteristics analysis of advanced diagnostic imaging equipment using new medical technology.Methods: This study used the Bass Diffusion Model to analyze demand characteristics for advanced diagnostic imaging equipment. Derived diffusion coefficients were applied for medium to long-term demand predictions (2021-2050). Parameter estimation employed non-linear regression analysis (SPSS 27.0). Demand characteristics were further analyzed using the ratio of the Bass

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Demeestere, Jelle, Carlos Garcia-Esperon, Pablo Garcia-Bermejo, et al. "Evaluation of hyperacute infarct volume using ASPECTS and brain CT perfusion core volume." Neurology 88, no. 24 (2017): 2248–53. http://dx.doi.org/10.1212/wnl.0000000000004028.

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Objective:To compare the accuracy of Alberta Stroke Program Early Computed Tomography Score (ASPECTS) and CT perfusion to detect established infarction in acute anterior circulation stroke.Methods:We performed an observational study in 59 acute anterior circulation ischemic stroke patients who underwent brain noncontrast CT, CT perfusion, and MRI within 100 minutes from CT imaging. ASPECTS scores were calculated by 4 blinded vascular neurologists. The accuracy of ASPECTS and CT perfusion core volume to detect an acute MRI diffusion lesion of ≥70 mL was evaluated using receiver operating charac

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Chae, Baek, Seung-Hwa Kang, and Yun-Cheol Heo. "Diffusion of telephone and changes in interpersonal relationship: An oral history study." Communication Theories 15, no. 3 (2019): 105–51. http://dx.doi.org/10.20879/ct.2019.15.3.105.

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Morris, N. "A Comparative Analysis of the Diffusion and Participatory Models in Development Communication." Communication Theory 13, >2 (2003): 225–48. http://dx.doi.org/10.1093/ct/13.2.225.

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Sato, Akira, and Koichi Ikeda. "Visualization of diffusion phenomena in porous media by means of X-ray computed tomography (CT) scanning." Canadian Geotechnical Journal 52, no. 10 (2015): 1448–56. http://dx.doi.org/10.1139/cgj-2014-0451.

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The migration of water and contamination materials in rock structures is a significant issue in projects that utilize deep underground locations such as “carbon-dioxide capture and storage” (CCS) and disposal of high-level nuclear waste. These phenomena are also important in the area of preservation of stone structures of cultural heritage signficance, as such stone structures are usually located outside, exposed to wind and rain. The migration of contamination materials in the underground environment, especially in porous rock mass, is governed mainly by water permeation and diffusion. In thi

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Savushkina, O. I., A. V. Cherniak, E. V. Kryukov, et al. "Pulmonary function after COVID-19 in early convalescence phase." Medical alphabet, no. 25 (October 26, 2020): 7–12. http://dx.doi.org/10.33667/2078-5631-2020-25-7-12.

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Pulmonary function after COVID-19 in early convalescence phase. The aim of the study is to investigate the influence of Coronavirus disease 2019 (COVID-19) on pulmonary function in early convalescence phase.Materials and methods. The study included 44 patients (35 male) after COVID-19 without concomitant bronchopulmonary pathology, with a median age of 47.5 years. All patients underwent standard pulmonary function tests (PFTs): spirometry, body plethysmography, diffusion test. Besides, dyspnea on the mMRC scale was assessed, oxygen saturation level (SpO2 ) was measured. Depending on degree of

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Haddock, Cynthia Carter, and James W. Begun. "The Diffusion of Two Diagnostic Technologies among Hospitals in New York State." International Journal of Technology Assessment in Health Care 4, no. 4 (1988): 593–600. http://dx.doi.org/10.1017/s0266462300007649.

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Using combined data from an independent survey by the American Hospital Association and the State of New York, the diffusion of two diagnostic technologies–the automated chemistry analyzer and the computed tomography (CT) scanner–among hospitals in New York State was analyzed. A linearized form of the logistic function was estimated using cumulative diffusion data for each. Diffusion patterns of both technologies fit the logistic curve well, with the coefficient of diffusion for the CT scanner being greater than that for the automated analyzer. Further analysis examined characteristics of earl

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Chen, Leqing, Feihong Wu, Jia Huang, et al. "Well-Aerated Lung and Mean Lung Density Quantified by CT at Discharge to Predict Pulmonary Diffusion Function 5 Months after COVID-19." Diagnostics 12, no. 12 (2022): 2921. http://dx.doi.org/10.3390/diagnostics12122921.

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Background: The aim of this study was to explore the predictive values of quantitative CT indices of the total lung and lung lobe tissue at discharge for the pulmonary diffusion function of coronavirus disease 2019 (COVID-19) patients at 5 months after symptom onset. Methods: A total of 90 patients with moderate and severe COVID-19 underwent CT scans at discharge, and pulmonary function tests (PFTs) were performed 5 months after symptom onset. The differences in quantitative CT and PFT results between Group 1 (patients with abnormal diffusion function) and Group 2 (patients with normal diffusi

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Da Silva, Marly Terezinha Quadri Simões, and Wellington Mazer. "Diffusion coefficient and tortuosity: Brownian Motion." CONTRIBUCIONES A LAS CIENCIAS SOCIALES 16, no. 9 (2023): 18281–302. http://dx.doi.org/10.55905/revconv.16n.9-264.

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The objective of this research is to determine the chloride ion diffusion through Brownian motion using images. The research also aims at the search for diffusional physical tortuosity due to Brownian motion to understand the transport flow of the chloride ion. Through micro-CT scanned images of concrete samples, a 3D reconstruction is performed for the representative element and define its microscopic properties. The implementation of the Brownian motion of the chloride ion particles in the porous network of the representative element considered the initial diffusion coefficient defined by th

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Hussain, Omar, Mayank Kaushal, Nitin Agarwal, Shekar Kurpad, and Saman Shabani. "The Role of Magnetic Resonance Imaging and Computed Tomography in Spinal Cord Injury." Life 13, no. 8 (2023): 1680. http://dx.doi.org/10.3390/life13081680.

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Traumatic injuries of the spine are associated with long-term morbidity and mortality. Timely diagnosis and appropriate management of mechanical instability and spinal cord injury are important to prevent further neurologic deterioration. Spine surgeons require an understanding of the essential imaging techniques concerning the diagnosis, management, and prognosis of spinal cord injury. We present a review in the role of computed tomography (CT) including advancements in multidetector CT (MDCT), dual energy CT (DECT), and photon counting CT, and how it relates to spinal trauma. We also review

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Gärtner, Friederike, Julia Forstenpointner, Birgit Ertl-Wagner, Babak Hooshmand, Christian Riedel, and Olav Jansen. "CT and MRI Findings in Cerebral Aspergilloma." RöFo - Fortschritte auf dem Gebiet der Röntgenstrahlen und der bildgebenden Verfahren 190, no. 10 (2017): 967–70. http://dx.doi.org/10.1055/s-0043-120766.

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Purpose Invasive aspergillosis usually affects immunocompromised patients. It carries a high risk of morbidity and mortality and usually has a nonspecific clinical presentation. Early diagnosis is essential in order to start effective treatment and improve clinical outcome. Materials and Methods In a retrospective search of the PACS databases from two medical centers, we identified 9 patients with histologically proven cerebral aspergilloma. We systematically analyzed CT and MRI imaging findings to identify typical imaging appearances of cerebral aspergilloma. Results CT did not show a typical

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Vitrio, Bianca, Vinícius Côgo Destefani, and Afrânio Côgo Destefani. "Advancing Neuroimaging Frontiers: A Comprehensive Review of Novel Diagnostic Techniques in Neuroradiology and Their Clinical Applications." Brazilian Journal of Implantology and Health Sciences 6, no. 8 (2024): 3962–83. http://dx.doi.org/10.36557/2674-8169.2024v6n8p3962-3983.

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The review article provides a comprehensive overview of the latest advancements in neuroradiological techniques and their clinical applications. It explores various advanced magnetic resonance imaging (MRI) methods, including diffusion-weighted imaging (DWI), diffusion tensor imaging (DTI), perfusion-weighted imaging (PWI), functional MRI (fMRI), and magnetic resonance spectroscopy (MRS), as well as developments in computed tomography (CT) technology, such as multidetector CT (MDCT) and dual-energy CT (DECT). The article discusses the principles, applications, and limitations of these techniqu

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Ruikar, Dr Sachin D., and Ms Vrushali N. Raut. "A Comparison of Filtering Techniques for Image Quality Improvement in Computed Tomography." INTERNATIONAL JOURNAL OF COMPUTERS & TECHNOLOGY 7, no. 3 (2013): 670–76. http://dx.doi.org/10.24297/ijct.v7i3.3445.

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Computed Tomography (CT) is an important and most common modality in medical imaging. In CT examinations there is trade off between radiation dose and image quality. If radiation dose is decreased, the noise will unavoidably increase degrading the diagnostic value of the CT image and ifthe radiation dose is increased, the associated risk of cancer also increases especially in paediatric applications. Image filtering techniques perform image pre-processing to improve the quality of images. These techniques serve two major purposes. One is to maintain low radiation dose and another is to make su

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Kauffmann-Guerrero, Diego, Julian Taugner, Chukwuka Eze, et al. "Clinical Management and Outcome of Grade III Pneumonitis after Chemoradioimmunotherapy for Inoperable Stage III Non-Small Cell Lung Cancer—A Prospective Longitudinal Assessment." Diagnostics 11, no. 11 (2021): 1968. http://dx.doi.org/10.3390/diagnostics11111968.

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Background: Maintenance treatment with immune-checkpoint inhibition (ICI) has been shown to significantly improve patient prognosis after chemoradiotherapy (CRT) for inoperable stage III NSCLC. This survival advantage may be achieved at the expense of an increased probability for symptomatic pneumonitis as CRT as well as ICI treatment is associated with the risk of treatment-related pulmonary toxicity. Methods: We screened a prospective chemoradioimmunotherapy (CRT-IO) cohort consisting of 38 patients and identified patients with therapy-related grade 3 pneumonitis. All patients were treated w

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Bautz, James B., Joel M. Schectman, Elaine G. Elinsky, and L. Gregory Pawlson. "Magnetic Resonance Imaging: Diffusion of Technology in an Ambulatory Setting." International Journal of Technology Assessment in Health Care 8, no. 02 (1992): 301–8. http://dx.doi.org/10.1017/s0266462300013519.

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AbstractTo better understand technology diffusion in an ambulatory care setting, we analyzed adult outpatients’ use of magnetic resonance (MR) and computed tomography (CT) imaging in a group-model HMO between 1986 and 1989. The use of MR, but not CT, Increased at a rapid pace with only a small proportion of the scans being accounted for by primary care physicians.

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Sun, Yingfeng, Yixin Zhao, Hongwei Zhang, and Cun Zhang. "Visualization of Gas Diffusion-Sorption in Coal: A Study Based on Synchrotron Radiation Nano-CT." Geofluids 2020 (July 2, 2020): 1–11. http://dx.doi.org/10.1155/2020/8835848.

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Gas diffusion-sorption is a critical step in coalbed methane (CBM) exploitation and carbon dioxide sequestration. Because of the particularity of gas physical properties, it is difficult to visualize the gas diffusion-sorption process in coal by experimental methods. Due to the limitation of experimental approaches to image the three-dimensional coal pore structure, it is impossible to obtain the three-dimensional pore structure images of coal. As a result, the visualization of gas diffusion-sorption in coal pore structure by numerical ways is impossible. In this study, gas diffusion coefficie

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Csaba, Weninger, and Rostás Tamás. "The MRI diagnotstics of cerebral edema. The discrimination of cytotoxic and vasogenic edema." Bulletin of Medical Sciences 96, no. 1 (2023): 70–88. https://doi.org/10.2478/orvtudert-2023-0007.

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Abstract Brain edema, defined as localized or extensive swelling of brain tissue, arises from various pathologies, including trauma, ischemia, hypoxic damage, inflammation (e.g., infection), rapidly growing tumors, and obstructive hydrocephalus. The main types are cytotoxic, vasogenic, and interstitial edema. Cytotoxic edema, typically affecting gray matter, occurs in acute infarction, hypoxic injury, and later stages of cranial trauma. Vasogenic edema, primarily affecting white matter, is associated with tumor growth, infection, early stages of trauma, and any condition disrupting the blood-b

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Tiwari, Shailendra, and Kavkirat Kaur. "Complex diffusion regularisation-based low dose CT image reconstruction." International Journal of Biomedical Engineering and Technology 35, no. 1 (2021): 37. http://dx.doi.org/10.1504/ijbet.2021.10035162.

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Kaur, Kavkirat, and Shailendra Tiwari. "Complex diffusion regularisation-based low dose CT image reconstruction." International Journal of Biomedical Engineering and Technology 35, no. 1 (2021): 37. http://dx.doi.org/10.1504/ijbet.2021.112833.

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Fiebach, J. B., P. D. Schellinger, O. Jansen, et al. "CT and Diffusion-Weighted MR Imaging in Randomized Order." Stroke 33, no. 9 (2002): 2206–10. http://dx.doi.org/10.1161/01.str.0000026864.20339.cb.

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Zhang, Youjian, Li Li, Jie Wang, et al. "Texture-preserving diffusion model for CBCT-to-CT synthesis." Medical Image Analysis 99 (January 2025): 103362. http://dx.doi.org/10.1016/j.media.2024.103362.

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Dubreuil, Julien, Jeremie Tordo, Domenico Rubello, Francesco Giammarile, and Andrea Skanjeti. "Diffusion-weighted MRI and 18F-FDG-PET/CT imaging." Nuclear Medicine Communications 38, no. 1 (2017): 84–90. http://dx.doi.org/10.1097/mnm.0000000000000612.

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Weiss, KL, KL Macura, and A. Ahmed. "Cerebral air embolism: Diffusion MRI as adjunct to CT." Journal of Stroke and Cerebrovascular Diseases 6, no. 6 (1997): 459. http://dx.doi.org/10.1016/s1052-3057(97)80136-x.

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Vlachopoulos, Georgios, Spyros Skiadopoulos, Andreas Petropoulos, Anna Karahaliou, and Lena Costaridou. "Edge-enhancing diffusion noise reduction in dual-energy CT." Physica Medica 30 (2014): e17. http://dx.doi.org/10.1016/j.ejmp.2014.07.064.

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Bao, Kun, Feng Wang, Chengming Qu, Defeng Kong, and Jian Song. "Multi-Region OpenFOAM Solver Development for Compact Toroid Transport in Drift Tube." Applied Sciences 15, no. 13 (2025): 7569. https://doi.org/10.3390/app15137569.

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Compact toroid (CT) injection, with its characteristics of high plasma density and extremely high injection velocity, is considered a highly promising method for core fueling in fusion reactors. Previous studies have lacked investigation into the transport process of CT within drift tubes. To investigate the dynamic processes of CT in drift tubes, this study developed a compressible magnetohydrodynamics (MHD) solver and a magnetic diffusion solver based on the OpenFOAM platform. They were integrated into a multi-region coupling framework to create a multi-region coupled MHD solver, mhdMRF, for

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Lee, So-Yeon, Won-Hee Jee, Ie Ryung Yoo, et al. "Comparison of 3T diffusion-weighted MRI and 18F-FDG PET/CT in musculoskeletal tumours: quantitative analysis of apparent diffusion coefficients and standardized uptake values." British Journal of Radiology 92, no. 1102 (2019): 20181051. http://dx.doi.org/10.1259/bjr.20181051.

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Objective: To determine whether the apparent diffusion coefficient (ADC) on 3T MR imaging including diffusion-weighted MR imaging (DWI) correlate with the standardized uptake value (SUV) on 18F-FDG PET/CT in musculoskeletal tumours. Methods: This retrospective cohort study included 57 patients (36 males, 21 females, mean age 54 years, range 12–90 years) with pathologically confirmed soft tissue (n = 32) and bone (n = 25) tumours who underwent 3T MR imaging including DWI and whole-body 18F-FDG PET/CT before treatment. 14 patients had follow-up MR imaging and 18F-FDG PET/CT after treatment. The

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Digvijay Singh and Chanchal Kaushik. "Comparative Analysis of CT and MRI in Emergency Assessment of Stroke: A Review." Journal of Multidisciplinary Research in Healthcare 5, no. 2 (2019): 57–63. http://dx.doi.org/10.15415/jmrh.2019.52007.

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Objective: To compare the diagnostic accuracy of computed tomography (CT) and magnetic resonance imaging (MRI)in emergency assessment of stroke in brain imaging from the review of literature. Method: Relevant databases (PubMed, google scholar etc.) were searched and literature were reviewed from 1995 to 2019. Literature from non-Scopus and unauthorized authorizations was excluded.Result: It was observed that for MRI DWI (Diffusion-weighted imaging) is preferred and in CT, axial sections are opted. In earlier studies, it was seen that neither CT nor MRI came out to besuperior. This may be due t

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Jannello, Karina. "Benito Milla: un Ulises desgraciado en el Río de la Plata. De Cuadernos Internacionales a Mundo Nuevo, del socialismo libertario al humanismo antibelicista." Catedral Tomada. Revista de crítica literaria latinoamericana 6, no. 11 (2019): 199–235. http://dx.doi.org/10.5195/ct/2018.359.

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The following article aims to recover the cultural management of the Spanish republican exiled in Montevideo Benito Milla between the 1950s and 1965s. Since his arrival in Montevideo, encouraged by his anarchist ideals, Milla sets up a reference space for the Uruguayan culture that is reconfiguring a humanist and anti-war left wing. Through its magazines Cuadernos Internacionales, Deslinde, Letras 62, Número (2ndep.) and Temas, but also through the editorials that he creates for the diffusion of the new talents of the Generation of 45: Deslinde and Alfa, Milla constitutes himself in a fundamen

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Wu, Hung-Ming, I.-Hui Lee, Chao-Bao Luo, Chih-Ping Chung, and Yung-Yang Lin. "Clinical-CT mismatch defined NIHSS ≥ 8 and CT-ASPECTS ≥ 9 as a reliable marker of candidacy for intravenous thrombolytic therapy in acute ischemic stroke." PLOS ONE 16, no. 4 (2021): e0251077. http://dx.doi.org/10.1371/journal.pone.0251077.

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Background Clinical-diffusion mismatch between stroke severity and diffusion-weighted imaging lesion volume seems to identify stroke patients with penumbra. However, urgent magnetic resonance imaging is sometimes inaccessible or contraindicated. Thus, we hypothesized that using brain computed tomography (CT) to determine a baseline “clinical-CT mismatch” may also predict the responses to thrombolytic therapy. Methods Brain CT lesions were measured using the Alberta Stroke Program Early CT Score (ASPECTS). A total of 104 patients were included: 79 patients with a baseline National Institutes of

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Hafeez, Moiz, and Nazir Khan. "DWI and NCCT - Ischemic patterns in global anoxic brain injury." IP Indian Journal of Neurosciences 7, no. 3 (2021): 251–53. http://dx.doi.org/10.18231/j.ijn.2021.045.

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This case report highlights differences between diffusion weighted imaging (DWI) and computed tomography (CT) with respect to the extent of ischemic changes detectable in brain parenchyma during global anoxic brain injury. Brain CT in a 65 year old patient post cardiac arrest showed striking diffuse loss of Gray-White matter differentiation consistent with global anoxic brain injury while magnetic resonance imaging (MRI) performed 3 days later showed diffusion restriction and hyperintensity only in select areas. DWI hyperintensity was seen in diverse structures including the hippocampi, globus

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Zhang, Jing, Xu Bai, Jing Yuan, et al. "Bladder paraganglioma: CT and MR imaging characteristics in 16 patients." Radiology and Oncology 56, no. 1 (2021): 46–53. http://dx.doi.org/10.2478/raon-2021-0055.

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Abstract Background Bladder paraganglioma (BPG) is a rare extra-adrenal pheochromocytoma with variable symptoms and easy to be misdiagnosed and mishandled. The aim of the study was to document the imaging features of BPG using computed tomography (CT) and magnetic resonance imaging (MRI). Patients and methods We retrospectively enrolled consecutive patients with pathology-proven BPG, who underwent CT or MRI examinations before surgery between October 2009 and October 2017. The clinical characteristics, CT, and MRI features of the patients were described and analysed. Results A total of 16 pati

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Wen, Han, Julio A. Huapaya, Shreya M. Kanth, et al. "Quantitative CT Metrics Associated with Variability in the Diffusion Capacity of the Lung of Post-COVID-19 Patients with Minimal Residual Lung Lesions." Journal of Imaging 9, no. 8 (2023): 150. http://dx.doi.org/10.3390/jimaging9080150.

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(1) Background: A reduction in the diffusion capacity of the lung for carbon monoxide is a prevalent longer-term consequence of COVID-19 infection. In patients who have zero or minimal residual radiological abnormalities in the lungs, it has been debated whether the cause was mainly due to a reduced alveolar volume or involved diffuse interstitial or vascular abnormalities. (2) Methods: We performed a cross-sectional study of 45 patients with either zero or minimal residual lesions in the lungs (total volume < 7 cc) at two months to one year post COVID-19 infection. There was considerable v

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Tu, Zhanhai, Zebin Xiao, Yingyan Zheng, Hongjie Huang, Libin Yang, and Dairong Cao. "Benign and malignant skull-involved lesions: discriminative value of conventional CT and MRI combined with diffusion-weighted MRI." Acta Radiologica 60, no. 7 (2018): 880–86. http://dx.doi.org/10.1177/0284185118773541.

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Background Little is known about the value of computed tomography (CT) and magnetic resonance imaging (MRI) combined with diffusion-weighted imaging (DWI) in distinguishing malignant from benign skull-involved lesions. Purpose To evaluate the discriminative value of DWI combined with conventional CT and MRI for differentiating between benign and malignant skull-involved lesions. Material and Methods CT and MRI findings of 58 patients with pathologically proven skull-involved lesions (43 benign and 15 malignant) were retrospectively reviewed. Conventional CT and MRI characteristics and apparent

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Ngoret, Joshua K., and Venkata P. Kommula. "Role of Aluminide coating degradation on Inconel 713 LC used for Compressor Turbines (CT) of Short-haul Aircrafts." MRS Advances 3, no. 38 (2018): 2281–96. http://dx.doi.org/10.1557/adv.2018.207.

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ABSTRACTThis paper investigates the role degradation of protective diffusion aluminide coating on Inconel 713LC used for CT blades of short-haul aircraft fleet played in having the blades prematurely retired from service at 6378 hours, as opposed to their pre-set service time of 10000 hours. The blade samples were subjected to various examinations; X-ray diffraction (XRD), X-ray fluorescence (XRF), scanning electron microscopy (SEM) and energy dispersive spectroscopy (EDS) analyse at the; tips, airfoil, as well as the base, transverse and longitudinal, sectioned and unsectioned. As affirmed by

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Wu, Qian, Lingshan Zhong, Hongwei Li, et al. "A Follow-Up Study of Lung Function and Chest Computed Tomography at 6 Months after Discharge in Patients with Coronavirus Disease 2019." Canadian Respiratory Journal 2021 (February 13, 2021): 1–7. http://dx.doi.org/10.1155/2021/6692409.

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We aimed to investigate changes in pulmonary function and computed tomography (CT) findings in patients with coronavirus disease 2019 (COVID-19) during the recovery period. COVID-19 patients underwent symptom assessment, pulmonary function tests, and high-resolution chest CT 6 months after discharge from the hospital. Of the 54 patients enrolled, 31 and 23 were in the moderate and severe group, respectively. The main symptoms 6 months after discharge were fatigue and exertional dyspnea, experienced by 24.1% and 18.5% of patients, respectively, followed by smell and taste dysfunction (9.3%) and

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Nesterova, E. S., G. A. Yatsyk, N. S. Lutsik, et al. "Informativeness of whole-body diffusion-weighted magnetic resonance imaging and positron emission tomography with computed tomography in follicular lymphoma." Terapevticheskii arkhiv 92, no. 7 (2020): 55–62. http://dx.doi.org/10.26442/00403660.2020.07.000774.

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Aim.This study conducted the possibilities of diffusion-weighted magnetic resonance imaging of the whole body diffusion WB-MRI (in comparison with positron emission tomography with computed tomography PET/CT) in assessing the volume and prevalence of the tumor, as well as determining bone marrow (BM) damage (for various cytological types) in the diagnosis and staging of the disease in patients with FL. Materials and methods.A prospective comparative search study included 15 patients (4 men and 11 women, with a median age of 53 years) with newly diagnosed FL. Patients have not received an

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Wu, Pei-Yu, Sheng-Fung Lin, Ping-Hsun Wu, et al. "Multiple Hypovascular Tumors in Kidney: A Rare Case Report and Differential Diagnosis." Case Reports in Medicine 2013 (2013): 1–4. http://dx.doi.org/10.1155/2013/595193.

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The most common malignant renal tumor is renal cell carcinoma and surgery is the standard treatment. The proportion of lymphoma with renal involvement is 2~15% and lymphoma could be cured by chemotherapy without nephrectomy. Sonography, computed tomography (CT), and magnetic resonance imaging (MRI) can detect and characterize a renal mass. We present a case of right renal hypovascular tumors and differential diagnosis of hypovascular tumors by image study. CT scan showed hypovascular tumors and MRI image revealed multifocal hypovascular solid tumors with significantly increased apparent diffus

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Shapira-Zaltsberg, Gali, Nagwa Wilson, Esther Trejo Perez, et al. "Whole-Body Diffusion-Weighted MRI Compared to 18 FFDG PET/CT in Initial Staging and Therapy Response Assessment of Hodgkin Lymphoma in Pediatric Patients." Canadian Association of Radiologists Journal 71, no. 2 (2020): 217–25. http://dx.doi.org/10.1177/0846537119888380.

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Purpose: The aim of our study was to compare whole-body diffusion-weighted MRI (WB-DWI-MRI) to fluoro-2-deoxyglucose positron emission tomography/computed tomography (FDG-PET/CT) in the assessment of initial staging and treatment response in pediatric patients with Hodgkin lymphoma. Materials and Methods: This prospective study comprised 11 children with Hodgkin lymphoma. Whole-body DWI-MRI and FDG-PET/CT were obtained at baseline and after 2 cycles of chemotherapy. Two radiologists measured the apparent diffusion coefficient (ADC) values of the sites of involvement agreed upon in consensus an

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Camargo, Selma Cristina Cury, Giulio Gavini, Carlos Eduardo Aun, Douglas Waterfield, and Jeffrey M. Coil. "Diffusion of calcitonin through the wall of the root canal." Brazilian Oral Research 18, no. 1 (2004): 59–62. http://dx.doi.org/10.1590/s1806-83242004000100011.

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The aim of this study was to evaluate the in vitro diffusion of synthetic salmon calcitonin (CT), used as an intracanal medication, to the external root surface, with or without the presence of intact root cementum. Fifty-four human central incisors were used in the experiment, and were divided into two groups of 21 (test groups) and two groups of 6 teeth (control groups). After root canal preparation, 10 ml of calcitonin was inserted within the root canal chamber. The root was sealed and made externally impermeable. Specimens were then placed in tubes with saline solution buffered with phosph

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VORST, KEITH L., EWEN C. D. TODD, and ELLIOT T. RYSER. "Improved Quantitative Recovery of Listeria monocytogenes from Stainless Steel Surfaces Using a One-Ply Composite Tissue." Journal of Food Protection 67, no. 10 (2004): 2212–17. http://dx.doi.org/10.4315/0362-028x-67.10.2212.

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Four sampling devices, a sterile environmental sponge (ES), a sterile cotton-tipped swab (CS), a sterile calcium alginate fiber-tipped swab (CAS), and a one-ply composite tissue (CT), were evaluated for quantitative recovery of Listeria monocytogenes from a food-grade stainless steel surface. Sterile 304-grade stainless steel plates (6 by 6 cm) were inoculated with approximately 106 CFU/cm2 L. monocytogenes strain Scott A and dried for 1 h. The ES and CT sampling devices were rehydrated in phosphate buffer solution. After plate swabbing, ES and CT were placed in 40 ml of phosphate buffer solut

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Musafija, Albert, Asher Barzilai, Jacob Ramon, and Ethan Rubinstein. "Effect of Cholera Toxin on Intestinal Elimination of Ciprofloxacin in Rabbits." Antimicrobial Agents and Chemotherapy 42, no. 2 (1998): 473–74. http://dx.doi.org/10.1128/aac.42.2.473.

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ABSTRACT The transepithelial intestinal elimination of ciprofloxacin (CPX) was studied in cholera toxin (CT)-challenged and control intestinal loops in the rabbit. CPX concentrations were similar in CT-challenged and control jejunal and ileal loops, while cecal elimination was negligible. The quantities of eliminated CPX per square centimeter of bowel wall were significantly higher in the small intestine CT-challenged loops. The mechanism of elimination of CPX in the small intestine is therefore mainly passive diffusion.

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Renzulli, Matteo, Alfredo Clemente, Anna Maria Ierardi, et al. "Imaging of Colorectal Liver Metastases: New Developments and Pending Issues." Cancers 12, no. 1 (2020): 151. http://dx.doi.org/10.3390/cancers12010151.

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Computed tomography (CT), magnetic resonance imaging (MRI), and 18-fluorideoxyglucose positron emission tomography (18FDG-PET) are historically the most accurate imaging techniques for diagnosing liver metastases. Recently, the combination of diffusion-weighted imaging and hepatospecific contrast media, such as gadoxetic acid in MRI, have been demonstrated to have the highest diagnostic accuracy, sensitivity, and specificity for detecting liver metastases. Various recent meta-analyses have confirmed the diagnostic superiority of this combination (diffusion-weighted imaging and gadoxetic acid-e

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Liu, Xuan, Yaoqin Xie, Chenbin Liu, et al. "Diffusion probabilistic priors for zero‐shot low‐dose CT image denoising." Medical Physics, October 16, 2024. http://dx.doi.org/10.1002/mp.17431.

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AbstractBackgroundDenoising low‐dose computed tomography (CT) images is a critical task in medical image computing. Supervised deep learning‐based approaches have made significant advancements in this area in recent years. However, these methods typically require pairs of low‐dose and normal‐dose CT images for training, which are challenging to obtain in clinical settings. Existing unsupervised deep learning‐based methods often require training with a large number of low‐dose CT images or rely on specially designed data acquisition processes to obtain training data.PurposeTo address these limi

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Zhao, Xuying, Wenjin Jiang, Xinting Zhang, Wenxiu Guo, Yunsong Zhao, and Xing Zhao. "Image reconstruction based on nonlinear diffusion model for limited-angle computed tomography." Inverse Problems, February 6, 2024. http://dx.doi.org/10.1088/1361-6420/ad2695.

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Abstract The problem of limited-angle computed tomography (CT) imaging reconstruction has a wide range of practical applications. Due to various factors such as high X-ray absorption, structural characteristics of the scanned object, and equipment limitations, it is often impractical to obtain a complete angular scan, resulting in limited-angle scan data. In this paper, we propose an iterative image reconstruction algorithm for limited-angle CT. The algorithm carries out a traditional CT reconstruction and a nonlinear diffusion process alternatively. Specifically, a subtle partial differ entia

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Melean, Y., Kathryn E. Washburn, P. T. Callaghan, and Christoph H. Arns. "numerical analysis of NMR pore-pore exchange measurements using micro X-ray computed tomography." Diffusion Fundamentals 10 (December 15, 2009). http://dx.doi.org/10.62721/diffusion-fundamentals.10.450.

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Pore-pore relaxation exchange experiments are a recent development and hold great promise to spectrally derive length scales and connectivity information relevant for transport in porous media. However, for large pores, NMR diffusion-relaxation techniques reach a limit because bulk relaxation becomes dominant. A combination of NMR and Xray-CT techniques could be beneficial and lead to better models for regions of unresolved porosity in CT images, increasing the accuracy of image based calculations of transport properties. In this study we carry out numerical NMR pore-pore exchange experiments

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