Results 301 to 310 of about 6,084,382 (354)

A real vessel phantom for imaging experimentation

Medical Physics, 1997
Vascular phantoms are used to evaluate imaging techniques such as ultrasound (US), CT, and angiography. They are expected to mimic the vasculature, surrounding tissue, and blood, and therefore must meet specific requirements on the mimicking materials, with respect to x‐ray attenuation and acoustic properties (velocity, attenuation).
Aaron Fenster, Aaron Fenster, Aaron Fenster, David W. Holdsworth, David W. Holdsworth, David W. Holdsworth, W.J. Dabrowski, Joy Dunmore-Buyze, Joy Dunmore-Buyze, Richard N. Rankin, Richard N. Rankin   +10 more
openaire   +3 more sources

Development of a dynamic flow imaging phantom for dynamic contrast-enhanced CT.

Medical Physics (Lancaster), 2011
PURPOSE Dynamic contrast enhanced CT (DCE-CT) studies with modeling of blood flow and tissue perfusion are becoming more prevalent in the clinic, with advances in wide volume CT scanners allowing the imaging of an entire organ with sub-second image ...
B. Driscoll, H. Keller, C. Coolens
semanticscholar   +1 more source

Increasing the utility of the mammographic phantom image.

Radiology, 1996
To increase the utility of the monthly accreditation mammographic phantom image, the authors added a light sensitometric strip on the same film. The optical densities of the steps on the sensitometric strip with values nearest those of the phantom background and disk were measured, and these optical densities and the density difference were recorded ...
Stephen Rudin, Daniel R. Bednarek
openaire   +3 more sources

Reducing metallic artifacts in postoperative spinal imaging: usefulness of IDEAL contrast-enhanced T1- and T2-weighted MR imaging--phantom and clinical studies.

Radiology, 2011
PURPOSE To prospectively compare the effectiveness of iterative decomposition of water and fat with echo asymmetry and least-squares estimation (IDEAL) T2-weighted and contrast material-enhanced T1-weighted magnetic resonance (MR) imaging with that of a ...
J. Cha, W. Jin, Min Hee Lee, Dong Hoon Kim, Jai-Soung Park, W. Shin, B. Yi   +6 more
semanticscholar   +1 more source

Phantom Images

2012
kritische berichte - Zeitschrift für Kunst- und Kulturwissenschaften, Bd. 40 Nr.
openaire   +2 more sources

Modular open-source imaging phantom

ISMRM Annual Meeting
Motivation: Overcome the high cost, lack of customisation and low global uptake of standard MRI imaging phantoms. Goal(s): Design an affordable open-source MRI imaging phantom, imaging protocols and analysis tools demonstrated, showcasing their efficacy ...
Igor Tyshchenko, Youheng Zeng, Yasmin Blunck, Bradford Moffat, Rebecca Glarin, Leigh Johnston   +5 more
semanticscholar   +1 more source

Phantoms for Magnetic Resonance Imaging

2013
Magnetic resonance imaging (MRI) provides exceptional soft tissue contrast and is capable of generating quantitative maps to demonstrate blood flow, water diffusion, temperature distribution, and tissue relaxation properties.
Reed Selwyn, Reed Selwyn
openaire   +2 more sources

Polymer gels for in-phantom dose imaging in radiotherapy

Applied Radiation and Isotopes, 2010
Normoxic polymer gel dosimeters are studied, with the aim of achieving a valid and advantageous method for in-phantom 3D dose determinations. Developments were carried out in the application of such dosimetric material to the method based on dosimeter gel layers that has shown good reliability for absorbed dose imaging in radiotherapy.
VANOSSI, ELENA, G. Gambarini, M. Carrara, MARIANI, MARIO   +3 more
openaire   +5 more sources

Phantom kidney on perfusion renal imaging

Seminars in Nuclear Medicine, 1984
A 67-year-old male presented with sudden onset of right flank pain and anuria. On examination he had signs of acute renal failure. An intravenous urogram showed a large right kidney with poor filling of the lower pole calyceal system suspicious for having a renal mass. The left kidney was not visualized. Renal ultrasonogram showed that the right kidney
openaire   +3 more sources

Evaluation of proton density by magnetic resonance imaging: phantom experiments and analysis of multiple component proton transverse relaxation.

Physics in Medicine and Biology, 1990
The quantitative evaluation of proton density by magnetic resonance imaging (MRI) is limited as a result of non-uniformities in the intensity distribution of the images and by the fact that only part of the protons of the tissue contribute to the image ...
Gunnar Brix, L. Schad, W. Lorenz
semanticscholar   +1 more source