scholarly journals Pulsed electric fields processing of apple tissue: Spatial distribution of electroporation by means of magnetic resonance imaging and computer vision system

2018 ◽  
Vol 47 ◽  
pp. 120-126 ◽  
Author(s):  
Nicolò Dellarosa ◽  
Luca Laghi ◽  
Luigi Ragni ◽  
Marco Dalla Rosa ◽  
Angelo Galante ◽  
...  
Keyword(s):  
Magnetic Resonance Imaging ◽  
Computer Vision ◽  
Spatial Distribution ◽  
Magnetic Resonance ◽  
Electric Fields ◽  
Vision System ◽  
Pulsed Electric Fields ◽  
Resonance Imaging ◽  
Computer Vision System ◽  
Apple Tissue

scholarly journals A SURVEY ON METHODS FOR RECONSTRUCTING SURFACES FROM UNORGANIZED POINT SETS / PAVIRŠIŲ REKONSTRUKCIJOS IŠ NESTRUKTŪRIZUOTŲ TAŠKŲ RINKINIŲ METODŲ APŽVALGA

2011 ◽  
Vol 3 (1) ◽  
pp. 10-14 ◽  
Author(s):  
Vilius Matiukas
Keyword(s):  
Magnetic Resonance Imaging ◽  
Computer Vision ◽  
Magnetic Resonance ◽  
Computer Graphics ◽  
Laser Scanning ◽  
Alternative Methods ◽  
3D Laser Scanning ◽  
Resonance Imaging ◽  
Point Sets ◽  
3D Surfaces

This paper addresses the issue of reconstructing and visualizing surfaces from unorganized point sets. These can be acquired using different techniques, such as 3D-laser scanning, computerized tomography, magnetic resonance imaging and multi-camera imaging. The problem of reconstructing surfaces from their unorganized point sets is common for many diverse areas, including computer graphics, computer vision, computational geometry or reverse engineering. The paper presents three alternative methods that all use variations in complementary cones to triangulate and reconstruct the tested 3D surfaces. The article evaluates and contrasts three alternatives.

scholarly journals MRI image analysis methods and applications: an algorithmic perspective using brain tumors as an exemplar

2020 ◽  
Vol 2 (1) ◽  
Author(s):  
Vachan Vadmal ◽  
Grant Junno ◽  
Chaitra Badve ◽  
William Huang ◽  
Kristin A Waite ◽  
...  
Keyword(s):  
Magnetic Resonance Imaging ◽  
Computer Vision ◽  
Image Analysis ◽  
Magnetic Resonance ◽  
Brain Tumors ◽  
Computational Techniques ◽  
Complex Nature ◽  
Resonance Imaging ◽  
Magnetic Resonance Imaging Mri ◽  
Mri Image

Abstract The use of magnetic resonance imaging (MRI) in healthcare and the emergence of radiology as a practice are both relatively new compared with the classical specialties in medicine. Having its naissance in the 1970s and later adoption in the 1980s, the use of MRI has grown exponentially, consequently engendering exciting new areas of research. One such development is the use of computational techniques to analyze MRI images much like the way a radiologist would. With the advent of affordable, powerful computing hardware and parallel developments in computer vision, MRI image analysis has also witnessed unprecedented growth. Due to the interdisciplinary and complex nature of this subfield, it is important to survey the current landscape and examine the current approaches for analysis and trend trends moving forward.

scholarly journals Magnetic resonance imaging of the behaviour of oil-in-water emulsions in the gastric lumen of man

2006 ◽  
Vol 95 (2) ◽  
pp. 331-339 ◽  
Author(s):  
Luca Marciani ◽  
Martin S. J. Wickham ◽  
Debbie Bush ◽  
Richard Faulks ◽  
Jeff Wright ◽  
...  
Keyword(s):  
Magnetic Resonance Imaging ◽  
Spatial Distribution ◽  
Gastric Emptying ◽  
Magnetic Resonance ◽  
Olive Oil ◽  
Stable Emulsion ◽  
Resonance Imaging ◽  
Oil In Water ◽  
Gastric Lumen ◽  
Acid Stable

Pre-processed foods often contain a high percentage of lipid, present as emulsions stabilised with various surface-active agents. The acidic gastric environment can affect the behaviour of such emulsions, modifying the lipid spatial distribution and, in turn, the rate of gastric emptying and nutrient delivery to the gut. The aim of the present study was to use echo-planar magnetic resonance imaging (EPI) to determine the behaviour of model olive oil emulsions during gastric processing. Six healthy male volunteers were intubated nasogastrically on two separate occasions and fed 500ml 15% (w/w) olive oil-in-water, surfactant-stabilised emulsions designed to have identical droplet size distribution and which were either stable or unstable under gastric acid conditions. EPI was used to assess the oil fraction of the intragastric emulsions, gastric emptying and to visualise the spatial distribution of the oil at 10, 30 and 50min postprandially. The in vivo imaging measurements of the oil volume fraction of the emulsions correlated well (r 0·66, acid-stable; r 0·52, acid-unstable) with that assayed in the gastric aspirates. Compared with the acid-stable emulsion, the acid-unstable emulsion in the gastric lumen rapidly separated into lipid-depleted ‘aqueous’ and lipid layers. Phase separation in the acid-unstable meal allowed the oil-depleted component to empty first and more rapidly than the stable emulsion as determined by the gastric emptying curves. These pilot data suggest that gastric processing and emptying of high-fat foods could be manipulated by careful choice of emulsifier.

Spatial Distribution of RF Power in Critical Organs during Magnetic Resonance Imaging

1992 ◽  
Vol 649 (1 Biological Ef) ◽  
pp. 176-187 ◽  
Author(s):  
M. GRANDOLFO ◽  
A. POLICHETTI ◽  
P. VECCHIA ◽  
O. P. GANDHI
Keyword(s):  
Magnetic Resonance Imaging ◽  
Spatial Distribution ◽  
Magnetic Resonance ◽  
Rf Power ◽  
Resonance Imaging
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