Results 41 to 50 of about 61,625 (311)

Network topology drives population temporal variability in experimental habitat networks

Population Ecology, EarlyView.
Habitat patches connected by dispersal pathways form habitat networks. We explored how network topology affects population outcomes in laboratory experiments using a model species (Daphnia carinata). Central habitat nodes in complex lattice networks exhibited lower temporal variability in population sizes, suggesting they support more stable ...
Yiwen Xu, J. Angus Webb, William D. Bovill, Elise L. King   +3 more
wiley   +1 more source

Digital mouse phantom for optical imaging

Journal of Biomedical Optics, 2007
We present a method for design and use of a digital mouse phantom for small animal optical imaging. We map the boundary of a mouse model from magnetic resonance imaging (MRI) data through image processing algorithms and discretize the geometry by a finite element (FE) descriptor.
Shekhar Dwivedi, Srikanth Suryanarayanan, Kajoli Banerjee Krishnan   +2 more
openaire   +3 more sources

Comprehensive phantom for interventional fluorescence molecular imaging [PDF]

Journal of Biomedical Optics, 2016
Fluorescence imaging has been considered for over a half-century as a modality that could assist surgical guidance and visualization. The administration of fluorescent molecules with sensitivity to disease biomarkers and their imaging using a fluorescence camera can outline pathophysiological parameters of tissue invisible to the human eye during ...
Anastasopoulou, Maria, Koch, Maximilian, Gorpas, Dimitris, Karlas, Angelos, Klemm, Uwe, Garcia-Allende, Pilar Beatriz, Ntziachristos, Vasilis   +6 more
openaire   +3 more sources

Geographic variation in walking activity in the red flour beetle Tribolium castaneum

Population Ecology, EarlyView.
This study examined whether there is geographic variation in field populations, focusing on the moving activity in the red flour beetle Tribolium castaneum. Results showed significant differences in moving activity among field populations but no correlation with latitude or meteorological factors.
Kentarou Matsumura
wiley   +1 more source

Estimating Effective Diameter and Scan Length of Abdomen and Pelvis for Radiation Dose Optimization in Computed Tomography Imaging Suitable for the Indian Population – A Preliminary Study

National Journal of Clinical Anatomy
Background: Utilization of computed tomography (CT) has dramatically increased during the last decade with a concurrent increase in exposure to ionizing radiation. Even low levels of exposure have been linked to the development of cancer.
Vandana Nathan, Roshan S. Livingstone, Ivan James Prithishkumar   +2 more
doaj   +1 more source

Preliminary Design and Evaluation of a B-Scan OCT-Guided Needle

Photonics, 2014
Real-time intraoperative B-scan optical coherence tomography (OCT) visualization of intraocular tissues is a desired ophthalmic feature during retinal procedures.
Karen M. Joos, Jin-Hui Shen
doaj   +1 more source

Quantitative imaging: systematic review of perfusion/flow phantoms

European Radiology Experimental, 2020
Background We aimed at reviewing design and realisation of perfusion/flow phantoms for validating quantitative perfusion imaging (PI) applications to encourage best practices.
Marije E. Kamphuis, Marcel J. W. Greuter, Riemer H. J. A. Slart, Cornelis H. Slump   +3 more
doaj   +1 more source

Between Droughts and Floods: The Seasonal Response of Freshwater Snails in Artificial Reservoirs in the Brazilian Semiarid Region

Population Ecology, EarlyView.
We investigate the seasonal dynamics of two freshwater snails, Biomphalaria straminea and Melanoides tuberculata, in artificial reservoirs of the Brazilian semiarid region. Despite regulated hydrology, B. straminea exhibited strong seasonal fluctuations associated with dry periods, while M. tuberculata maintained stable populations throughout the year,
Lucas Henrique Sousa da Silva, João Hemerson de Sousa, Adriana Josefa da Rocha, Manuella Feitosa Leal, Lucas Ariel de Sousa Aguiar, Tamaris Gimenez Pinheiro, Edson Lourenço da Silva   +6 more
wiley   +1 more source

Low-cost three-dimensional printed phantom for neuraxial anesthesia training: Development and comparison to a commercial model. [PDF]

PLoS ONE, 2018
METHODS:Anonymized CT DICOM data was segmented to create a 3D model of the lumbar spine. The 3D model was modified, placed inside a digitally designed housing unit and fabricated on a desktop 3D printer using polylactic acid (PLA) filament. The model was
Azad Mashari, Mario Montealegre-Gallegos, Jelliffe Jeganathan, Lu Yeh, Joshua Qua Hiansen, Massimiliano Meineri, Feroze Mahmood, Robina Matyal   +7 more
doaj   +1 more source

Using an Ultrasound Tissue Phantom Model for Hybrid Training of Deep Learning Models for Shrapnel Detection

Journal of Imaging, 2022
Tissue phantoms are important for medical research to reduce the use of animal or human tissue when testing or troubleshooting new devices or technology.
Sofia I. Hernandez-Torres, Emily N. Boice, Eric J. Snider   +2 more
doaj   +1 more source