Results 51 to 60 of about 137,016 (337)

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

The unpredictably eruptive dynamics of spruce budworm populations in eastern Canada

Population Ecology, EarlyView.
We examine historical population data for spruce budworm from several locations through the period 1930–1997, and use density‐dependent recruitment curves to test whether the pattern of population growth over time is more consistent with Royama's (1984; Ecological Monographs 54:429–462) linear R(t) model of harmonic oscillation at Green River New ...
Barry J. Cooke, Jacques Régnière
wiley   +1 more source

Noise Reduction in Brain CT: A Comparative Study of Deep Learning and Hybrid Iterative Reconstruction Using Multiple Parameters

Tomography
Objectives: We evaluated the noise reduction effects of deep learning reconstruction (DLR) and hybrid iterative reconstruction (HIR) in brain computed tomography (CT).
Yusuke Inoue, Hiroyasu Itoh, Hirofumi Hata, Hiroki Miyatake, Kohei Mitsui, Shunichi Uehara, Chisaki Masuda   +6 more
doaj   +1 more source

Artificial neural network-statistical approach for PET volume analysis and classification [PDF]

, 2012
Copyright © 2012 The Authors. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.This ...
Abbod, Maysam, Abbod, Maysam, Amira, Abbes, Amira, Abbes, Sharif, M., Sharif, M., Zaidi, Habib, Zaidi, Habib   +7 more
core   +4 more sources

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

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

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

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

Dosimetric validation of a magnetic resonance image gated radiotherapy system using a motion phantom and radiochromic film. [PDF]

, 2017
PurposeMagnetic resonance image (MRI) guided radiotherapy enables gating directly on the target position. We present an evaluation of an MRI-guided radiotherapy system's gating performance using an MRI-compatible respiratory motion phantom and ...
Berbeco, Brady, Chuang, Fayad, Freislederer, Garibaldi, Giraud, Jin, Keall, Kini, Koch, Lewis, Low, Malinowski, Nioutsikou, Ozhasoglu, Sanders, Seppenwoolde, Shiinoki, Shirato, Smith, Tacke, Voort, Wagman, Wiersma, Wojcieszynski, Wunderink, Yoganathan, Yousefi   +28 more
core   +1 more source