Magnetic Resonance - Technology Information Portal Welcome to MRI Technology
Info
  Sheets

Out-
      side
 



 
 'Matrix Size' 
SEARCH FOR    
 
  2 3 5 A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
Result : Searchterm 'Matrix Size' found in 1 term [] and 3 definitions [], (+ 7 Boolean[] results
1 - 5 (of 11)     next
Result Pages : [1]  [2 3]
MRI Resources 
Absorption and Emission - Coils - - General - Databases - Bioinformatics
 
Matrix Size
 
The number of data points collected in one, two or all three directions. Normally used for the 2D in plane sampling. The display matrix may be different from the acquisition matrix, although the latter determines the resolution. Measurement time may be saved by not acquiring raw data lines corresponding to high resolution. Not measured rows are filled with zeroes prior to the image calculation. A square image is the result of an interpolation in phase encoding direction. See also Zero Filling.
mri safety guidance
Image Guidance
The chosen matrix size effects scan time, resolution and SNR. Reduced measurement matrixes decrease the scan time and the resolution by increased SNR.
spacer
 
• Share the entry 'Matrix Size':  Facebook  Twitter  LinkedIn  
 
• Related Searches:
    • Zero Filling
    • Image Quality
    • Sinc Interpolation
    • Resolution
    • Matrices
Searchterm 'Matrix Size' was also found in the following service: 
spacer
Ultrasound  (3) Open this link in a new window
ResolutionForum -
related threads
 
Resolution is a function of slice thickness, field of view (FOV) and matrix size. The resolution in plane is a function of FOV / matrix size.
spacer

• View the DATABASE results for 'Resolution' (150).Open this link in a new window


• View the NEWS results for 'Resolution' (10).Open this link in a new window.
 
Further Reading:
  Basics:
Micro-MRI Principles, Strengths, and Weaknesses
Tuesday, 10 January 2017   by www.news-medical.net    
  News & More:
High-resolution MRI enables direct imaging of neuronal activity - DIANA – direct imaging of neuronal activity
Friday, 18 November 2022   by physicsworld.com    
Deep learning-based single image super-resolution for low-field MR brain images
Saturday, 16 April 2022   by www.nature.com    
A Comparison of Methods for High-Spatial-Resolution Diffusion-weighted Imaging in Breast MRI
Tuesday, 25 August 2020   by pubs.rsna.org    
MRI Resources 
MRCP - Functional MRI - MRI Technician and Technologist Career - Raman Spectroscopy - General - MRI Centers
 
Sinc InterpolationMRI Resource Directory:
 - Calculation -
 
A method of interpolating image data by zero filling the high spatial-frequency components of the raw data so that after Fourier transformation the image matrix size has been increased. This method can significantly improve the image display.
spacer
MRI Resources 
Colonography - Jobs - Safety Training - MRI Physics - IR - Safety pool
 
Zero Filling
 
Substitution of zeroes for unmeasured data points in order to increase the matrix size of the new data prior to Fourier transformation of MR data. This can be equivalent to performing an interpolation (ZIP - zero fill interpolation processing) in the transformed data, resulting in pixels smaller than the actual resolution of the image.
spacer

• View the DATABASE results for 'Zero Filling' (4).Open this link in a new window

Searchterm 'Matrix Size' was also found in the following service: 
spacer
Ultrasound  (3) Open this link in a new window
Altaire™InfoSheet: - Devices -
Intro, 
Types of Magnets, 
Overview, 
etc.MRI Resource Directory:
 - Devices -
 
www.hitachimed.com/products/altaire.asp From Hitachi Medical Systems America, Inc.;
the AIRIS made its debut in 1995. Hitachi followed up with the AIRIS II system, which has proven equally successfully. 'All told, Hitachi has installed more than 1,000 MRI systems in the U.S., holding more than 17 percent of the total U.S. MRI installed base, and more than half of the installed base of open MR systems,' says Antonio Garcia, Frost and Sullivan industry research analyst. Now Altaire employs a blend of innovative Hitachi features called VOSI™ technology, optimizing each sub-system's performance in concert with the other sub-systems, to give the seamless mix of high-field performance and the patient comfort, especially for claustrophobic patients, of open MR systems.

Device Information and Specification
CLINICAL APPLICATION
Whole body
CONFIGURATION
Vertical Field, Open MRI
DualQuad T/R Body Coil, MA Head, MA C-Spine, MA Shoulder, MA Wrist, MA CTL Spine, MA Knee, MA TMJ, MA Flex Body (3 sizes), Neck, small and large Extremity, PVA (WIP), Breast (WIP), Neurovascular (WIP), Cardiac (WIP) and MA Foot//Ankle (WIP)
SYNCHRONIZATION
Cardiac gating, ECG/peripheral, respiratory gating (2 modes)
PULSE SEQUENCES
SE, GE, GR, IR, FIR, STIR, ss-FSE, FSE, DE-FSE/FIR, FLAIR, ss/ms-EPI, ss/ms EPI- DWI, SSP, MTC, SE/GE-EPI, MRCP, SARGE, RSSG, TRSG, BASG, Angiography: CE, PC, 2D/3D TOF
IMAGING MODES
Single, multislice, volume study
TR
SE: 30 - 10,000msec GE: 3.6 - 10,000msec IR: 50 - 16,700msec FSE: 200 - 16,7000msec
TE
SE : 8 - 250msec IR: 5.2 -7,680msec GE: 1.8 - 2,000 msec FSE: 5.2 - 7,680
SINGLE/MULTI SLICE
0.05 sec/image (256 x 256)
FOV
5cm to 45 cm continuous
2D: 2 - 100 mm; 3D: 0.5 - 5 mm
1280 x 1024
MEASURING MATRIX
512 x 512
PIXEL INTENSITY
Level Range: -2,000 to +4,000
Sub millimeter
MAGNET TYPE
Self-shielded, superconducting
BORE DIAMETER
or W x H
110 x 43 cm
MAGNET WEIGHT
41,700 kg
H*W*D
256 x 348 x 236 cm
POWER REQUIREMENTS
208 V +/- 10%, 3 phase
COOLING SYSTEM TYPE
Water-cooled
STRENGTH
22 mT/m
3.1 m lateral, 3.6 m vertical
Auto shimming, 3-axis/patient and active shimming
spacer

• View the DATABASE results for 'Altaire™' (2).Open this link in a new window

 
Further Reading:
  News & More:
Altaire High-Field Open MRI(.pdf)
2001
MRI Resources 
Colonography - Safety Products - Quality Advice - Nerve Stimulator - Brain MRI - Corporations
 
     1 - 5 (of 11)     next
Result Pages : [1]  [2 3]
 Random Page
 
Share This Page
FacebookTwitterLinkedIn

MR-TIP    
Community   
User
Pass
Forgot your UserID/Password ?    



Personalized protocols (age, gender, body habitus, etc.) lead to :
more automated planning 
improved patient comfort 
better diagnostics 
optimized image quality 
nothing 

Look
      Ups





MR-TIP.com uses cookies! By browsing MR-TIP.com, you agree to our use of cookies.

Magnetic Resonance - Technology Information Portal
Member of SoftWays' Medical Imaging Group - MR-TIP • Radiology-TIP • Medical-Ultrasound-Imaging • 
Copyright © 2003 - 2024 SoftWays. All rights reserved. [ 29 March 2024]
Terms of Use | Privacy Policy | Advertising
 [last update: 2024-02-26 03:41:00]