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Triggering in quantitative diffusion imaging with single-shot EPI

Brockstedt, Sara LU ; Borg, M; Geijer, Bo LU ; Wirestam, Ronnie LU ; Thomsen, C; Holtås, Stig LU and Ståhlberg, Freddy LU (1999) In Acta Radiologica 40(3). p.263-269
Abstract
PURPOSE: The aim of this study was to evaluate any possible effects of brain motion, CSF pulsations and other possible sources of physiological motion in electrocardiographic (ECG) triggered and non-triggered single-shot echo-planar imaging (EPI) measurements of diffusion. MATERIAL AND METHODS: Three different triggering protocols were evaluated in 6 healthy volunteers: 1) ECG triggering with time delay (TD) 100 ms; 2) ECG triggering with TD 400 ms; and 3) no triggering at all. RESULTS: The results obtained showed that white matter mean apparent diffusion coefficient (ADC) values were similar for all triggering protocols and that the reproducibility in ADC measurements using diffusion-weighted (DW) EPI was good. The average standard... (More)
PURPOSE: The aim of this study was to evaluate any possible effects of brain motion, CSF pulsations and other possible sources of physiological motion in electrocardiographic (ECG) triggered and non-triggered single-shot echo-planar imaging (EPI) measurements of diffusion. MATERIAL AND METHODS: Three different triggering protocols were evaluated in 6 healthy volunteers: 1) ECG triggering with time delay (TD) 100 ms; 2) ECG triggering with TD 400 ms; and 3) no triggering at all. RESULTS: The results obtained showed that white matter mean apparent diffusion coefficient (ADC) values were similar for all triggering protocols and that the reproducibility in ADC measurements using diffusion-weighted (DW) EPI was good. The average standard deviation of the ADC values was, however, higher for ADC maps obtained without ECG triggering. CONCLUSION: The use of prospective diastolic ECG triggering significantly improves the accuracy of quantitative diffusion measurements but for routine clinical diffusion imaging, where quantitative data is of less importance, the accuracy obtained without ECG triggering can be considered adequate. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Acta Radiologica
volume
40
issue
3
pages
263 - 269
publisher
John Wiley & Sons
external identifiers
  • pmid:10335963
  • scopus:0033126837
ISSN
1600-0455
language
English
LU publication?
yes
id
e19b0b5b-8bd1-4669-8eb0-025aca7755a8 (old id 1114176)
date added to LUP
2008-07-03 14:33:26
date last changed
2017-07-23 04:35:50
@article{e19b0b5b-8bd1-4669-8eb0-025aca7755a8,
  abstract     = {PURPOSE: The aim of this study was to evaluate any possible effects of brain motion, CSF pulsations and other possible sources of physiological motion in electrocardiographic (ECG) triggered and non-triggered single-shot echo-planar imaging (EPI) measurements of diffusion. MATERIAL AND METHODS: Three different triggering protocols were evaluated in 6 healthy volunteers: 1) ECG triggering with time delay (TD) 100 ms; 2) ECG triggering with TD 400 ms; and 3) no triggering at all. RESULTS: The results obtained showed that white matter mean apparent diffusion coefficient (ADC) values were similar for all triggering protocols and that the reproducibility in ADC measurements using diffusion-weighted (DW) EPI was good. The average standard deviation of the ADC values was, however, higher for ADC maps obtained without ECG triggering. CONCLUSION: The use of prospective diastolic ECG triggering significantly improves the accuracy of quantitative diffusion measurements but for routine clinical diffusion imaging, where quantitative data is of less importance, the accuracy obtained without ECG triggering can be considered adequate.},
  author       = {Brockstedt, Sara and Borg, M and Geijer, Bo and Wirestam, Ronnie and Thomsen, C and Holtås, Stig and Ståhlberg, Freddy},
  issn         = {1600-0455},
  language     = {eng},
  number       = {3},
  pages        = {263--269},
  publisher    = {John Wiley & Sons},
  series       = {Acta Radiologica},
  title        = {Triggering in quantitative diffusion imaging with single-shot EPI},
  volume       = {40},
  year         = {1999},
}