An investigation of internal scatter during computed tomography using an anthropomorphic phantom
ConclusionsA non-statistical significance for Computed Tomography examinations with and without Lead Shielding in confirmation with the AAPM positional statement. (Source: Health and Technology)
Source: Health and Technology - April 19, 2024 Category: Information Technology Source Type: research
Daring ‘James Bond’ mission to drill Antarctic ices cores could reveal future of sea level rise
The helicopter hovered overhead, whipping up snow. Shielding his face, Peter Neff grabbed the dangling cargo load and guided it to the Antarctic ice. The helicopter sped back to the South Korean icebreaker
RV Araon
, 20 kilometers away, to fetch more gear. One trip down, 17 more to go,
thought Neff, a polar glaciologist
at the University of Minnesota (UM) Twin Cities. Time was ticking away on this day in January. In the best-case scenario, Neff and his team would have just 10 days to drill ice cores on Canisteo, a peninsula on the west coast of Antarctica—and a blizzard was already looming.
Ever...
Source: Science of Aging Knowledge Environment - April 18, 2024 Category: Geriatrics Source Type: research
It's OK to move! Effect of a brief video on community confidence in activity despite back pain: A randomised trial
CONCLUSION: Participants who viewed a brief video intervention reported a very small difference in confidence to become active despite low back pain, compared with no intervention. The difference may lack clinical relevance.PMID:38635937 | DOI:10.2519/jospt.2024.12412 (Source: Health Physics)
Source: Health Physics - April 18, 2024 Category: Physics Authors: Edel T O'Hagan Adrian C Traeger Siobhan M Schabrun Sean O'Neill Benedict M Wand Aidan G Cashin Christopher M Williams Ian A Harris James H McAuley Source Type: research
Raman Characterization of Plastics: A DFT Study of Polystyrene
This study addresses this gap by using theoretical calculations to generate ab initio spectra for polystyrene, a reference material. The aim is to explain the origins of the spectral peaks and their consistency across various compositions and structures using linear ordered polymeric and finite amorphous models. The CRYSTAL package is employed to obtain full Raman spectra based on a careful benchmark of computational settings. While some peaks are present across all spectra and can serve for calibration, others exhibit structure-dependent behavior, enabling polymer identification. We conclude that Raman spectroscopy is a w...
Source: Health Physics - April 18, 2024 Category: Physics Authors: Beata Taudul Frederik Tielens Monica Calatayud Source Type: research
Deep learning-based optimization of field geometry for total marrow irradiation delivered with volumetric modulated arc therapy
CONCLUSIONS: The generated field geometries were clinically acceptable and adequate, even for an MP with high level of expertise in TMI/TMLI. Incorporating the knowledge of the MPs into the development cycle was crucial for optimizing the models, especially in this scenario with limited data.PMID:38634859 | DOI:10.1002/mp.17089 (Source: Health Physics)
Source: Health Physics - April 18, 2024 Category: Physics Authors: Nicola Lambri Giorgio Longari Daniele Loiacono Ricardo Coimbra Brioso Leonardo Crespi Carmela Galdieri Francesca Lobefalo Giacomo Reggiori Roberto Rusconi Stefano Tomatis Luisa Bellu Stefania Bramanti Elena Clerici Chiara De Philippis Damiano Dei Pierina Source Type: research
Study of PRESAGE ® dosimeter for end-to-end 3D radiotherapy verification using an anthropomorphic phantom with bespoke dosimeter insert
This study proves the capability of PRESAGE® and bespoke MAX-HD phantom in conjunction with the 3DmicroHD-OCT system to measure 3D dose distribution for end-to-end dosimetry verification.PMID:38634981 | DOI:10.1007/s13246-024-01418-9 (Source: Health Physics)
Source: Health Physics - April 18, 2024 Category: Physics Authors: Muhammad Zamir Mohyedin Hafiz Mohd Zin Auwal Abubakar Ahmad Taufek Abdul Rahman Source Type: research
The impact of advancing the standard of care in radiotherapy on operational treatment resources
CONCLUSION: The clinical implementation of hypofractionated treatment regimens has successfully reduced the radiotherapy workload and operational treatment hours required to treat patients. This analysis describes the impact of changes to the standard of care on institutional resources.PMID:38634814 | DOI:10.1002/acm2.14363 (Source: Journal of Applied Clinical Medical Physics)
Source: Journal of Applied Clinical Medical Physics - April 18, 2024 Category: Physics Authors: Michael Roumeliotis Kundan Thind Hali Morrison Ben Burke Kevin Martell Lukas van Dyke Lisa Barbera Sarah Quirk Source Type: research
Evaluation and mitigation of deformable image registration uncertainties for MRI-guided adaptive radiotherapy
CONCLUSIONS: Among the three MIM DIR algorithms, MIM-CC shows the smallest errors in terms of MDA and DSC but exhibits significant Jacobian uncertainties in the interior regions of abdominal organs. The hybrid FEM technique effectively mitigates the Jacobian uncertainties in these regions.PMID:38634799 | DOI:10.1002/acm2.14358 (Source: Journal of Applied Clinical Medical Physics)
Source: Journal of Applied Clinical Medical Physics - April 18, 2024 Category: Physics Authors: Hualiang Zhong Kristofer K Kainz Eric S Paulson Source Type: research
DIMOND: DIffusion Model OptimizatioN with Deep Learning
Adv Sci (Weinh). 2024 Apr 18:e2307965. doi: 10.1002/advs.202307965. Online ahead of print.ABSTRACTDiffusion magnetic resonance imaging is an important tool for mapping tissue microstructure and structural connectivity non-invasively in the in vivo human brain. Numerous diffusion signal models are proposed to quantify microstructural properties. Nonetheless, accurate estimation of model parameters is computationally expensive and impeded by image noise. Supervised deep learning-based estimation approaches exhibit efficiency and superior performance but require additional training data and may be not generalizable. A new DIf...
Source: Adv Data - April 18, 2024 Category: Epidemiology Authors: Zihan Li Ziyu Li Berkin Bilgic Hong-Hsi Lee Kui Ying Susie Y Huang Hongen Liao Qiyuan Tian Source Type: research
Optical fiber bundle differential compressive imaging
We present a differential compressive imaging method for an optical fiber bundle (OFB), which provides a solution for an ultrathin ... (Source: Optics Letters)
Source: Optics Letters - April 18, 2024 Category: Physics Authors: Zhixiang Jiang Ya Wen Lipei Song Da Li Xing Zhao Source Type: research
High-order QAM NANF transmission utilizing MIMO equalizer integrated with low-complexity decision-directed carrier phase estimation
We experimentally realized a high-speed nested anti-resonant nodeless fiber (NANF) transmission with the assistance of the polarization ... (Source: Optics Letters)
Source: Optics Letters - April 18, 2024 Category: Physics Authors: Chen Wang Kaihui Wang Jianyu Long Wen Zhou Feng Zhao Lei Shen Peng Li Jianjun Yu Source Type: research
Experimental reservoir computing with diffractively coupled VCSELs
We present experiments on reservoir computing (RC) using a network of vertical-cavity surface-emitting lasers (VCSELs) that we ... (Source: Optics Letters)
Source: Optics Letters - April 18, 2024 Category: Physics Authors: Moritz Pfl ü ger Daniel Brunner Tobias Heuser James A. Lott Stephan Reitzenstein Ingo Fischer Source Type: research
Long range topography by dispersion unmatched spectral-domain interferometry based on virtually imaged phased array modes
We propose to realize a long range topography by dispersion unmatched spectral-domain interferometry based on virtually imaged phased array ... (Source: Optics Letters)
Source: Optics Letters - April 18, 2024 Category: Physics Authors: Tao Han Lu Yang Yun Tang Changyong Chen Cui Ma Zhiyi Liu Zhihua Ding Source Type: research
Low-loss and compact photonic lantern based on a step-index double cladding fiber
The fulfilment of the adiabatic criterion is indispensable for the realization of a low-loss photonic lantern (PL), concurrently imposing a ... (Source: Optics Letters)
Source: Optics Letters - April 18, 2024 Category: Physics Authors: Cong Zhang Yue Wang Senyu Zhang Meng Xiang Songnian Fu Yuwen Qin Source Type: research
Polarization feature fusion and calculation of birefringence dynamics in complex anisotropic media
As a complex anisotropic medium, variation in birefringence within biological tissues is closely associated with numerous physiological ... (Source: Optics Letters)
Source: Optics Letters - April 18, 2024 Category: Physics Authors: Rui Hao Nan Zeng Zheng Zhang Honghui He Chao He Hui Ma Source Type: research
