Results 41 to 50 of about 137,016 (337)

A quality assurance phantom for electronic portal imaging devices [PDF]

, 2011
Electronic portal imaging device (EPID) plays an important role in radiation therapy portal imaging, geometric and dosimetric verification. Consistent image quality and stable radiation response is necessary for proper utilization that requires routine ...
Cao, Minsong, Cheng, Chee-Wai, Das, Indra J., Johnstone, Peter A.S., Misic, Vladimir, Scheuring, Klaus, Schüle, Edmund   +6 more
core   +1 more source

Quantitative magnetic resonance imaging phantoms: A review and the need for a system phantom [PDF]

Magnetic Resonance in Medicine, 2017
The MRI community is using quantitative mapping techniques to complement qualitative imaging. For quantitative imaging to reach its full potential, it is necessary to analyze measurements across systems and longitudinally. Clinical use of quantitative imaging can be facilitated through adoption and use of a standard system phantom, a calibration ...
Kathryn E. Keenan, Maureen Ainslie, Alex J. Barker, Michael A. Boss, Kim M. Cecil, Cecil Charles, Thomas L. Chenevert, Larry Clarke, Jeffrey L. Evelhoch, Paul Finn, Daniel Gembris, Jeffrey L. Gunter, Derek L.G. Hill, Clifford R. Jack, Edward F. Jackson, Guoying Liu, Stephen E. Russek, Samir D. Sharma, Michael Steckner, Karl F. Stupic, Joshua D. Trzasko, Chun Yuan, Jie Zheng   +22 more
openaire   +4 more sources

The effect of spatial resolution on the reproducibility of diffusion imaging when controlled signal to noise ratio

Biomedical Journal, 2019
Background: The purpose of the study is to evaluate the reproducibility and repeatability of the compartmental diffusion measurement. Methods: Two identical whipping cream phantoms and two healthy Sprague–Dawley rats were scanned on a 7T MR scanner, each
Yao-Liang Chen, Yu-Jen Lin, Sung-Han Lin, Chih-Chien Tsai, Yu-Chun Lin, Jur-Shan Cheng, Jiun-Jie Wang   +6 more
doaj   +1 more source

Validation of the GATE Monte Carlo simulation platform for modelling a CsI(Tl) scintillation camera dedicated to small animal imaging [PDF]

, 2004
Monte Carlo simulations are increasingly used in scintigraphic imaging to model imaging systems and to develop and assess tomographic reconstruction algorithms and correction methods for improved image quantitation.
Breton, V., Buvat, I., Donnarieix, D., Giokaris, N., Lazaro, D., Loudos, G., Maigne, L., Santin, G., Spanoudaki, V., Staelens, S., Strul, D., Styliaris, S.   +11 more
core   +3 more sources

Development of an anthropomorphic breast phantom for combined PET, B-mode ultrasound and elastographic imaging

, 2011
International audienceCombining the advantages of different imaging modalities leads to improved clinical results. For example, ultrasound provides good real-time structural information without any radiation and PET provides sensitive functional ...
Auffray, Etiennette, Dang, Jun, Felix, Nicolas, Frisch, Benjamin, Lasaygues, Philippe, Lecoq, Paul, Mensah, Serge, Tavernier, Stephan, Varela, Joao, Wan, Mingxi, Zhang, Dachun   +10 more
core   +2 more sources

Quantitative evaluation of an optimized Time of Flight Magnetic Resonance Imaging procedure using a phantom setup to simulate aqueous humor flow

Data in Brief, 2018
Preclinical Magnetic Resonance Imaging at high field strength offers the great advantage of combining anatomical information and very high resolution of down to 25 µm in mice and even higher resolutions in ex vivo settings.
Thomas Wecker, Christian van Oterendorp, Wilfried Reichardt   +2 more
doaj   +1 more source

An Innovative Concept of a 3D-Coded Aperture Imaging System Proposed for Early Breast Cancer Detection

Diagnostics, 2022
Coded Aperture (CA) imaging has recently been used in nuclear medicine, but still, there is no commercial SPECT imaging camera based on CA for cancer detection. The literature is rich in examples of using the CA for planar and thin 3D imaging.
Khalid Hussain, Mohammed A. Alnafea, M Iqbal Saripan, Djelloul Mahboub, Rozi Mahmud, Wan Azizun Wan Adnan, Dong Xianling   +6 more
doaj   +1 more source

Feasibility of Imaging Tissue Electrical Conductivity by Switching Field Gradients with MRI. [PDF]

, 2015
Tissue conductivity is a biophysical marker of tissue structure and physiology. Present methods of measuring tissue conductivity are limited. Electrical impedance tomography, and magnetic resonance electrical impedance tomography rely on passing external
Gibbs, Eric, Liu, Chunlei
core   +2 more sources

X-ray luminescence computed tomography using a focused X-ray beam

, 2017
Due to the low X-ray photon utilization efficiency and low measurement sensitivity of the electron multiplying charge coupled device (EMCCD) camera setup, the collimator based narrow beam X-ray luminescence computed tomography (XLCT) usually requires a ...
Li, Changqing, Lun, Michael C, Nguyen, Alex Anh-Tu, Zhang, Wei   +3 more
core   +2 more sources

Design of a realistic PET-CT-MRI phantom [PDF]

, 2011
The validation of the PET image quality of new PET-MRI systems should be done against the image quality of currently available PET-CT systems. This includes the validation of new attenuation correction methods.
Espana Palomares, Samuel, Fierens, Yves, Keereman, Vincent, Mollet, Pieter, Vandenberghe, Stefaan   +4 more
core   +1 more source