Results 131 to 140 of about 371,017 (169)

Measuring patient motion in HR-pQCT

2009 IEEE International Symposium on Biomedical Imaging: From Nano to Macro, 2009
Patient motion affects image quality in high-resolution peripheral quantitative computed-tomography (HR-pQCT) and the quantitative analysis of bone quality using morphological parameters. We propose a method to automatically quantify the amount of patient motion contained in an acquired sinogram based on the Helgason-Ludwig consistency conditions (HLCC)
Yves Pauchard, Fábio J. Ayres, Steven K. Boyd   +2 more
openaire   +1 more source

Bone microarchitecture impairment in prolactinoma patients assessed by HR-pQCT

Osteoporosis International, 2022
Prolactinoma may reduce bone mineral density (BMD) and increase fracture risk, but its influence on bone microarchitecture remains to be elucidated. The purpose of this study is to evaluate bone microarchitecture parameters by high-resolution peripheral quantitative computed tomography (HR-pQCT) in prolactinoma patients.31 prolactinoma patients and 62 ...
L, Wang, K, Chen, L, Duan, X, Ke, F, Gong, H, Pan, H, Yang, H, Zhu, W, Xia   +8 more
openaire   +2 more sources

Measuring Apparent Trabecular Structure With pQCT: A Comparison With HR-pQCT

Journal of Clinical Densitometry, 2014
We evaluated how comparable peripheral quantitative computed tomography (pQCT) measurements of cortical thickness, density, and apparent trabecular structure at the ultradistal tibia were with those measured with high-resolution pQCT (HR-pQCT). We also examined whether the accuracy of the pQCT-based trabecular and cortical measurements improved with ...
Deena, Lala, Angela M, Cheung, Cheryl L, Lynch, Dean, Inglis, Chris, Gordon, George, Tomlinson, Lora, Giangregorio   +6 more
openaire   +4 more sources

Optimization-Based Motion Estimation in HR-PQCT

2025 IEEE 22nd International Symposium on Biomedical Imaging (ISBI)
The imaging modality high-resolution peripheral quantitative computed tomography (HR-pQCT) enables assessment of bone mineral density and three-dimensional microarchitecture of peripheral limbs. Due to its long scan time, this modality is especially susceptible towards motion of the patient.
Jürß, Paul, Knopp, Tobias, Busse, Björn, Von Brackel Felix, Boberg, Marija   +4 more
openaire   +1 more source

Automatic detection and localization of bone erosion in hand HR-pQCT

Medical Imaging 2019: Computer-Aided Diagnosis, 2019
Rheumatoid arthritis (RA) is an inflammatory disease which afflicts the joints with arthritis and periarticular bone destruction as a result. One of its central features is bone erosion, a consequence of excessive bone resorption and insufficient bone formation.
Jintao Ren, Arash Moaddel H., Ellen M. Hauge, Kresten K. Keller, Rasmus K. Jensen, François Lauze   +5 more
openaire   +2 more sources

Fast and Accurate 3-D Registration of HR-pQCT Images

IEEE Transactions on Information Technology in Biomedicine, 2010
High-resolution peripheral quantitative computed tomography (HR-pQCT) is a new noninvasive bone imaging technology that generates high-resolution 3-D images for quantitatively analysis of the bone microarchitecture in human. To enable quantitative evaluation of bone changes, either bone gain or loss, accurate alignment between the baseline and follow ...
Lin Shi 0001, Defeng Wang, Vivian W. Y. Hung, Benson H. Y. Yeung, James F. Griffith, Winnie C. W. Chu, Pheng-Ann Heng, Jack Chun Yiu Cheng, Ling Qin   +8 more
openaire   +2 more sources

Relationships between QUS and HR-pQCT, DXA, and bone turnover markers

Journal of Bone and Mineral Metabolism, 2022
Relationship of quantitative ultrasound (QUS) with high-resolution peripheral quantitative computed tomography (HR-pQCT), dual-energy X-ray absorptiometry (DXA), and bone-related biochemical markers was analyzed.The subjects were 480 individuals. Speed of sound (SOS) was measured by calcaneal QUS.
Ryuji Niimi, Ko Chiba, Narihiro Okazaki, Akihiko Yonekura, Masato Tomita, Makoto Osaki   +5 more
openaire   +2 more sources

Multisite longitudinal calibration of HR-pQCT scanners and precision in osteogenesis imperfecta

Bone, 2021
For high-resolution peripheral quantitative computed tomography (HR-pQCT) to be used in longitudinal multi-center studies to assess disease and treatment effects, data must be aggregated across multiple timepoints and scanners. This requires an understanding of the factors contributing to scanner precision, and multi-scanner cross-calibration ...
Nicholas Mikolajewicz, Elizabeth A. Zimmermann, Maximilian Rummler, Seyedmahdi Hosseinitabatabaei, Catherine Julien, Francis H. Glorieux, Frank Rauch, Bettina M. Willie   +7 more
openaire   +2 more sources

HR-pQCT parameters of the distal radius correlate with the bending strength of the radial diaphysis

Bone, 2022
High resolution, peripheral quantitative computed tomography (HR-pQCT) scanners can now characterize an individual's trabecular architecture, cortical structure, and volumetric bone mineral density at a nominal resolution of 61 μm. While predictions of failure load of the distal radius and tibial diaphysis in compression by finite element analysis (FEA)
Sasidhar, Uppuganti, Thammathida, Ketsiri, Yumeng, Zhang, Mark D, Does, Jeffry S, Nyman   +4 more
openaire   +2 more sources

Best HR-pQCT parameters for prediction of fracture risk

2023
Learning objectives: To outline the main parameters provided by high-resolution peripheral quantitative computed tomography (HR-pQCT) To discuss available evidence supporting the role of HR-pQCT parameters in predicting fracture risk To identify the best parameters for...
openaire   +1 more source