In contrast to the two distinct energy regions that are involved in dual-energy x-ray absorptiometry for bone densitometry, the complete spectrum of a beam transmitted through two layers of different materials is utilized in this study to calculate the areal density of each material. Test objects constructed from aluminum and Plexiglas were used to simulate cortical bone and soft tissue, respectively. Solid-state HPGe (high-purity germanium) detectors provided high-resolution x-ray spectra over an energy range of approximately 20-80 keV. Areal densities were obtained from spectra using two methods: a system of equations for two spectral regions and a nonlinear fit of the entire spectrum. Good agreement with the known areal densities of aluminum was obtained over a wide range of PMMA thicknesses. The spectral method presented here can be used to decrease beam hardening at a small number of bodily points selected for examination.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1088/0031-9155/55/20/005 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Trends in osteoporosis assessment, diagnosis after fragility fractures, and treatment for hospitalized patients with osteoporosis or fragility fractures between 2012 and 2021.
Arch Osteoporos
January 2025
Department of Endocrinology and Diabetes, Xiamen Clinical Medical Center for Endocrine and Metabolic Diseases, Xiamen Diabetes Institute, The First Affiliated Hospital of Xiamen University, No. 55 Zhenhai Road, Xiamen, 361003, China.
Unlabelled: Our study investigated trends in osteoporosis management in Xiamen from 2012 to 2021, revealing improvements in screening and treatment, although medication use remained low. Additionally, we identified factors that may influence medication use and emphasized the importance of effective osteoporosis management strategies.
Purpose: The goal of the current study is to explore trends in assessment, diagnosis after fragility fractures, and osteoporosis treatment among hospitalized patients in Xiamen, China, between 2012 and 2021.
The Effect of Carnosine Supplementation on Musculoskeletal Health in Adults with Prediabetes and Type 2 Diabetes: A Secondary Analysis of a Randomized Controlled Trial.
Nutrients
December 2024
Department of Medicine, School of Clinical Sciences, Faculty of Medicine, Nursing and Health Sciences, Monash University, Clayton, VIC 3168, Australia.
Background/objectives: Type 2 diabetes (T2D) is associated with an increased risk of adverse musculoskeletal outcomes likely due to heightened chronic inflammation, oxidative stress, and advanced glycation end-products (AGE). Carnosine has been shown to have anti-inflammatory, anti-oxidative, and anti-AGE properties. However, no clinical trials have examined the impact of carnosine on musculoskeletal health in adults with prediabetes or T2D.
View Article and Find Full Text PDFBone Health in Patients with Rheumatoid Arthritis in Bahrain.
Medicina (Kaunas)
December 2024
College of Medicine and Health Sciences, Arabian Gulf University, Manama 329, Bahrain.
: Compared to the general population, rheumatoid arthritis (RA) patients have additional disease-specific risk factors for osteoporosis that include chronic exposure to systemic inflammation. The current study aimed to investigate the prevalence of osteoporosis and its associated risk factors, such as age, sex, body mass index (BMI), uric acid (UA), and vitamin D status, but also the coexistence of type 2 diabetes mellitus (DMT2) and breast cancer (Ca breast) in patients with RA in Bahrain. : Data from DEXA scans were collected retrospectively from the patient's electronic health records.
View Article and Find Full Text PDFEvaluation of bone mineral density and its influencing factors in patients infected with HIV under antiretroviral therapy.
BMC Infect Dis
January 2025
Department of Infectious Diseases, School of Medicine, Iranian Research Center for HIV/AIDS, Iranian Institute for Reduction of High Risk Behaviors, Imam Khomeini Hospital Complex, Tehran University of Medical Sciences, Tehran, Iran.
Background: Reduced Bone Mineral Density (BMD) has been linked to Human Immunodeficiency Virus (HIV) infection and treatment. There is a lack of information regarding the osteoporosis status of middle-aged patients with HIV in Iran, despite the fact that Antiretroviral Therapy (ART) is widely accessible.
Objective: The purpose of this cross-sectional study was to assess the BMD status and low BMD risk factors in patients with HIV under ART living in Iran.
The Association between Social Support and Musculoskeletal Health in Community-Dwelling Older Adults: Findings from the Hertfordshire Cohort Study.
Calcif Tissue Int
January 2025
MRC Lifecourse Epidemiology Centre, University of Southampton, Southampton General Hospital, Southampton, UK.
Previous studies suggest social support is associated with musculoskeletal health in later life. We explored this relationship further in community-dwelling older adults, by considering associations between different aspects of social support and musculoskeletal health in community-dwelling adults. Participants from the Hertfordshire Cohort Study reported level of confiding/emotional, practical, and negative support using the Close Persons Questionnaire.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!