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 ADC            Analog to Digital Converter 
Searchterm 'adc' was found in the Abbreviation Register. 
 ADC            Apparent Diffusion Coefficient 
Searchterm 'adc' was found in the Abbreviation Register. 
Result : Searchterm 'adc' found in 2 terms [] and 8 definitions []
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Searchterm 'adc' was also found in the following services: 
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ADC MapMRI Resource Directory:
 - Diffusion Weighted Imaging -
 
An ADC map shows parametric images containing the apparent diffusion coefficients of diffusion weighted images. The term apparent refers to the dependence of these coefficients on factors other than prior molecular mobility. Also called diffusion map.
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• Related Searches:
    • Diffusion Weighted Imaging
    • Functional Magnetic Resonance Imaging
    • Diffusion Weighted Sequence
    • B-Value
    • Diffusion
 
Further Reading:
  News & More:
Diffusion-weighted MRI in Advanced Epithelial Ovarian Cancer: Apparent Diffusion Coefficient as a Response Marker
Tuesday, 1 October 2019   by pubs.rsna.org    
MRI Resources 
MR Myelography - MR Guided Interventions - Stimulator pool - Universities - Jobs - Claustrophobia
 
Stuck ADC Bit ArtifactInfoSheet: - Artifacts - 
Case Studies, 
Reduction Index, 
etc.MRI Resource Directory:
 - Artifacts -
 
Quick Overview
Artifact Information
NAME
Stuck ADC bit
DESCRIPTION
Ghosting
REASON
Hardware problem
HELP
Data correction
This artifact is uncommon with modern MRI equipment, but possible. It can occur if there are bad memory locations or bad connectors in the parallel data bus of the computer.
mri safety guidance
Image Guidance
This artifact is the result of a hardware failure and must be addressed by a service representative.
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Further Reading:
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MRI Artifact Gallery
   by chickscope.beckman.uiuc.edu    
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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.
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• 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    
Searchterm 'adc' was also found in the following services: 
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Analog to Digital Converter
 
(ADC) A system that receives analog input data and produces digital values at its output. Used by the MRI scanner to convert the received signal into a format more compatible with the computer systems.
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• View the DATABASE results for 'Analog to Digital Converter' (9).Open this link in a new window

MRI Resources 
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Data Clipping (Artifact)InfoSheet: - Artifacts - 
Case Studies, 
Reduction Index, 
etc.MRI Resource Directory:
 - Artifacts -
 
Data clipping artifacts give images a washed-out, non-uniform appearance. If the receiver gain increase, so that the signal level is larger than the maximum ADC value, the reconstructed image brightness was scaled to compensate this. The overall intensity loss as well as the extensive signal is reconstructed outside of the object. This effect is called 'clipping' because on a plot of signal amplitude vs. time, it looks like the top and bottom of the echo has been 'clipped off' with scissors.

See Radio Frequency Overflow Artifact.
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