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

Out-
      side
 



 
 'Thermal Equilibrium' 
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 'Thermal Equilibrium' found in 1 term [] and 2 definitions []
1 - 3 (of 3)     
Result Pages : [1]
MRI Resources 
Process Analysis - Distributors - Mass Spectrometry - Supplies - Portals - Homepages
 
Thermal Equilibrium
 
A state in which all parts of a system are at the same effective temperature, in particular where the relative alignment of the spins with the magnetic field is determined solely by the thermal energy of the system (in which case the relative numbers of spins with different alignments will be given by the Boltzmann distribution).
spacer
 
• Share the entry 'Thermal Equilibrium':  Facebook  Twitter  LinkedIn  
 
Further Reading:
  News & More:
Evaluation of Absorbed Dose by MRI Read-Out
Saturday, 18 November 2017   by www.jstage.jst.go.jp    
Searchterm 'Thermal Equilibrium' was also found in the following service: 
spacer
Radiology  (2) Open this link in a new window
Boltzmann Distribution
 
When a group of spins is placed in a magnetic field, each spin aligns in one of the two possible orientations. The relative numbers of spins with different alignments will be given by the Boltzmann distribution.
Definition: if a system of particles, which are able to exchange energy in collisions is in thermal equilibrium, then the relative number (population) of particles, N1 and N2, in two particular energy levels with corresponding energies, E1 and E2, is given by N1/N2 = exp [-(E1 - E2)/kT] where k is the Boltzmann constant and T is the absolute temperature.
For example, in NMR of protons at room temperature in a magnetic field of 0.25 tesla, the difference in relative numbers of spins aligned with the magnetic field and against the field is about one part in a million; the small excess of nuclei in the lower energy state is the basis of the net magnetization and the resonance phenomenon.
spacer

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

MRI Resources 
Veterinary MRI - Non-English - Brain MRI - Mobile MRI Rental - MRI Reimbursement - Software
 
Population
 
The numbers of nuclei or electrons in different energy levels. At thermal equilibrium, the relative populations of the energy levels will be given by the Boltzmann distribution.

See also Boltzmann Distribution.
spacer

• View the DATABASE results for 'Population' (5).Open this link in a new window


• View the NEWS results for 'Population' (2).Open this link in a new window.
MRI Resources 
RIS - Pacemaker - Spine MRI - Manufacturers - Lung Imaging - Jobs pool
 
     1 - 3 (of 3)     
Result Pages : [1]
 Random Page
 
Share This Page
FacebookTwitterLinkedIn

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



New acceleration techniques will :
reduce scan times 
cause artifacts 
increase expenses 
be useful if you have a lot of experience 
doesn't do much 
never heard of 

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. [ 22 December 2024]
Terms of Use | Privacy Policy | Advertising
 [last update: 2024-02-26 03:41:00]