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

Out-
      side
 



 
 'Trace Image' 
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 'Trace Image' found in 1 term [] and 1 definition [], (+ 14 Boolean[] results
1 - 5 (of 16)     next
Result Pages : [1]  [2 3 4]
MRI Resources 
Homepages - MRI Technician and Technologist Jobs - NMR - MR Myelography - Contrast Agents -
 
Trace Image
 
In trace images, the contrast is generated by the direction of the diffusion tensor. This parametric images contains the average of the three eigenvalues (independent of the frame of reference).
spacer
 
• Share the entry 'Trace Image':  Facebook  Twitter  LinkedIn  
MRI Resources 
Stent - Service and Support - MRA - Artifacts - Implant and Prosthesis - Liver Imaging
 
Diffusion Tensor ImagingInfoSheet: - Sequences - 
Intro, 
Overview, 
Types of, 
etc.MRI Resource Directory:
 - Diffusion Weighted Imaging -
 
(DTI) Diffusion tensor imaging is the more sophisticated form of DWI, which allows for the determination of directionality as well as the magnitude of water diffusion. This kind of MR imaging can estimates damage to nerve fibers that connect the area of the brain affected by the stroke to brain regions that are distant from it, and can be used to determine the effectiveness of stroke prevention medications.
DTI (FiberTrak) enables to visualize white matter fibers in the brain and can map (trace image) subtle changes in the white matter associated with diseases such as multiple sclerosis and epilepsy, as well as assessing diseases where the brain's wiring is abnormal, such as schizophrenia.
The fractional anisotropy (FA) gives information about the shape of the diffusion tensor at each voxel. The FA is based on the normalized variance of the eigenvalues. The fractional anisotropy reflects differences between an isotropic diffusion and a linear diffusion. The FA range is between 0 and 1 (0 = isotropic diffusion, 1 = highly directional).
The development of new imaging methods and some useful analysis techniques, such as 3-dimensional anisotropy contrast (3DAC) and spatial tracking of the diffusion tensor tractography (DTT), are currently under study.
spacer

• View the DATABASE results for 'Diffusion Tensor Imaging' (9).Open this link in a new window


• View the NEWS results for 'Diffusion Tensor Imaging' (2).Open this link in a new window.
 
Further Reading:
  Basics:
EVALUATION OF HUMAN STROKE BY MR IMAGING
2000
  News & More:
What MRI-Derived Data and Other Factors Reveal About White Matter Hyperintensity in Former Football Players
Saturday, 23 December 2023   by www.diagnosticimaging.com    
Effect of gadolinium-based contrast agent on breast diffusion-tensor imaging
Thursday, 6 August 2020   by www.eurekalert.org    
Learning difficulties linked to poor brain connectivity
Monday, 2 March 2020   by cosmosmagazine.com    
New imaging technique reveals early brain damage caused by hypertension
Friday, 18 September 2015   by www.medicalnewstoday.com    
Imaging shows structural changes in mild traumatic brain injury
Thursday, 25 October 2007   by www.eurekalert.org    
MRI Resources 
Services and Supplies - Libraries - DICOM - Software - MRI Accidents - MRI Technician and Technologist Jobs
 
Molecular Imaging
 
Molecular Imaging is a new diagnostic discipline to visualize biological processes.
Molecular magnetic resonance imaging (mMRI) offers the potential to image tissues at the cellular and subcellular level. Targeted MR contrast agents enhance the diagnostic specificity and range of molecular magnetic resonance imaging.
Other modalities that can be used for noninvasive molecular imaging:
Ultrasound;
optical imaging;
positron emission tomography (PET);
single photon emission computed tomography (SPECT).


See also Nanoparticle, Monocrystalline Iron Oxide Nanoparticle, Polycrystalline Iron Oxide Nanoparticles, Liposomes, Monoclonal Antibodies, Bimodal Imaging, Tumor Specific Agents, and Intracellular Contrast Agents.
spacer

• View the DATABASE results for 'Molecular Imaging' (10).Open this link in a new window


• View the NEWS results for 'Molecular Imaging' (28).Open this link in a new window.
 
Further Reading:
  Basics:
Multimodal Nanoparticles for Quantitative Imaging(.pdf)
Tuesday, 13 December 2011   by alexandria.tue.nl    
Molecular Magnetic Resonance Imaging(.pdf)
2005   by www.medical.siemens.com    
  News & More:
Smarter MRI diagnosis with nano MRI lamp
Monday, 6 February 2017   by www.eurekalert.org    
Molecular MRI technique gives early indication of cancer treatment effectiveness
Monday, 11 April 2016   by www.healthimaging.com    
Molecular imaging and radiochemistry: the importance of instrumentation. An interview with Professor Bjorn Wangler
Thursday, 4 February 2016   by www.news-medical.net    
Positron Emission Tomographic Imaging in Stroke
Monday, 28 December 2015   by www.ncbi.nlm.nih.gov    
Potential and Limitations of Oxygen-17 MR Perfusion Measurements
Monday, 1 March 2004   by www.case.edu    
MRI Resources 
Used and Refurbished MRI Equipment - RIS - Nerve Stimulator - Quality Advice - Devices - Mobile MRI
 
Apparent Diffusion CoefficientInfoSheet: - Artifacts - 
Case Studies, 
Reduction Index, 
etc.MRI Resource Directory:
 - Diffusion Weighted Imaging -
 
(ADC) A diffusion coefficient to differentiate T2 shine through effects or artifacts from real ischemic lesions. In the human brain, water diffusion is a three-dimensional process that is not truly random because the diffusional motion of water is impeded by natural barriers. These barriers are cell membranes, myelin sheaths, white matter fiber tracts, and protein molecules.
The apparent water diffusion coefficients can be calculated by acquiring two or more images with a different gradient duration and amplitude (b-values). The contrast in the ADC map depends on the spatially distributed diffusion coefficient of the acquired tissues and does not contain T1 and T2* values.
The increased sensitivity of diffusion-weighted MRI in detecting acute ischemia is thought to be the result of the water shift intracellularly restricting motion of water protons (cytotoxic edema), whereas the conventional T2 weighted images show signal alteration mostly as a result of vasogenic edema.
The reduced ADC value also could be the result of decreased temperature in the nonperfused tissues, loss of brain pulsations leading to a decrease in apparent proton motion, increased tissue osmolality associated with ischemia, or a combination of these factors. The lower ADC measurements seen with early ischemia, have not been fully established, however, a lower apparent ADC is a sensitive indicator of early ischemic brain at a stage when ischemic tissue remains potentially salvageable.

See also Diffusion Weighted Imaging and Diffusion Tensor Tractography.
spacer

• View the DATABASE results for 'Apparent Diffusion Coefficient' (4).Open this link in a new window

 
Further Reading:
  Basics:
Implementation of Dual-Source RF Excitation in 3 T MR-Scanners Allows for Nearly Identical ADC Values Compared to 1.5 T MR Scanners in the Abdomen
Wednesday, 29 February 2012   by www.plosone.org    
EVALUATION OF HUMAN STROKE BY MR IMAGING
2000
  News & More:
The utility of texture analysis of kidney MRI for evaluating renal dysfunction with multiclass classification model
Tuesday, 30 August 2022   by www.nature.com    
Diffusion-weighted MRI in Advanced Epithelial Ovarian Cancer: Apparent Diffusion Coefficient as a Response Marker
Tuesday, 1 October 2019   by pubs.rsna.org    
EORTC study aims to qualify ADC as predictive imaging biomarker in preoperative regimens
Monday, 4 January 2016   by www.eurekalert.org    
Novel MRI Technique Could Reduce Breast Biopsies, University of Washington Study
Tuesday, 2 October 2012   by www.eurekalert.org    
Hopkins researchers use diffusion MRI technique to monitor ultrasound uterine fibroid treatment
Monday, 8 August 2005   by www.eurekalert.org    
MRI Resources 
Diffusion Weighted Imaging - Process Analysis - Journals - Mass Spectrometry - General - Resources
 
Dual Echo Fast Gradient EchoInfoSheet: - Sequences - 
Intro, 
Overview, 
Types of, 
etc.
 
(DE FGRE, Dual/FFE, DE FFE) Simultaneously acquired in and out of phase TE gradient echo images. To quantitatively measure the signal intensity differences between out of phase and in phase images the parameters should be the same except for the TE.
The chemical shift artifact appearing on the out-of-phase image allows for the detection of lipids in the liver or adrenal gland, such as diffuse fatty infiltration, focal fatty infiltration, focal fatty sparing, benign adrenocortical masses and intracellular lipids within a hepatocellar neoplasm, where spin echo and fat suppression techniques are not as sensitive. Specific pathologies that have been reported include liver lipoma, angiomyolipoma, myelolipoma, metastatic liposarcoma, teratocarcinoma, melanoma, haemorrhagic neoplasm and metastatic choriocarcinoma.
 
Images, Movies, Sliders:
 MRI Liver In Phase  Open this link in a new window
    
 MRI Liver Out Of Phase  Open this link in a new window
    
 
spacer

• View the DATABASE results for 'Dual Echo Fast Gradient Echo' (2).Open this link in a new window

 
Further Reading:
  News & More:
Adrenal Myelolipoma
Tuesday, 19 June 2001   by www.emedicine.com    
MRI Resources 
Non-English - MRI Technician and Technologist Jobs - Safety Products - Functional MRI - Mobile MRI Rental - Breast MRI
 
     1 - 5 (of 16)     next
Result Pages : [1]  [2 3 4]
 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. [ 28 March 2024]
Terms of Use | Privacy Policy | Advertising
 [last update: 2024-02-26 03:41:00]