Effects of Inflow and Radiofrequency Spoiling on the Arterial Input Function in Dynamic Contrast-Enhanced MRI: A Combined Phantom and Simulation Study
Garpebring, Anders ; Wirestam, Ronnie LU
; Ostlund, Nils
and Karlsson, Mikael
(2011)
In Magnetic Resonance in Medicine
65(6).
p.1670-1679
- Abstract
- The arterial input function is crucial in pharmacokinetic analysis of dynamic contrast-enhanced MRI data. Among other artifacts in arterial input function quantification, the blood inflow effect and nonideal radiofrequency spoiling can induce large measurement errors with subsequent reduction of accuracy in the pharmacokinetic parameters. These errors were investigated for a 3D spoiled gradient-echo sequence using a pulsatile flow phantom and a total of 144 typical imaging settings. In the presence of large inflow effects, results showed poor average accuracy and large spread between imaging settings, when the standard spoiled gradient-echo signal equation was used in the analysis. For example, one of the investigated inflow conditions... (More)
- The arterial input function is crucial in pharmacokinetic analysis of dynamic contrast-enhanced MRI data. Among other artifacts in arterial input function quantification, the blood inflow effect and nonideal radiofrequency spoiling can induce large measurement errors with subsequent reduction of accuracy in the pharmacokinetic parameters. These errors were investigated for a 3D spoiled gradient-echo sequence using a pulsatile flow phantom and a total of 144 typical imaging settings. In the presence of large inflow effects, results showed poor average accuracy and large spread between imaging settings, when the standard spoiled gradient-echo signal equation was used in the analysis. For example, one of the investigated inflow conditions resulted in a mean error of about 40% and a spread, given by the coefficient of variation, of 20% for K-trans. Minimizing inflow effects by appropriate slice placement, combined with compensation for nonideal radiofrequency spoiling, significantly improved the results, but they remained poorer than without flow (e. g., 3-4 times larger coefficient of variation for K-trans). It was concluded that the 3D spoiled gradient-echo sequence is not optimal for accurate arterial input function quantification and that correction for nonideal radiofrequency spoiling in combination with inflow minimizing slice placement should be used to reduce the errors. Magn Reson Med 65:1670-1679, 2011. (C)2011 Wiley-Liss, Inc. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/1985284
- author
- Garpebring, Anders
; Wirestam, Ronnie
LU
; Ostlund, Nils
and Karlsson, Mikael
- organization
- publishing date
- 2011
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- dynamic contrast-enhanced MRI, arterial input function, blood flow, effects, RF spoiling
- in
- Magnetic Resonance in Medicine
- volume
- 65
- issue
- 6
- pages
- 1670 - 1679
- publisher
- John Wiley & Sons Inc.
- external identifiers
-
- wos:000291115500017
- scopus:79958266746
- pmid:21305599
- ISSN
- 1522-2594
- DOI
- 10.1002/mrm.22760
- language
- English
- LU publication?
- yes
- id
- 6f1c652d-fc0f-46f8-842b-b43c223d6605 (old id 1985284)
- date added to LUP
- 2016-04-01 10:11:37
- date last changed
- 2022-01-25 20:42:41
@article{6f1c652d-fc0f-46f8-842b-b43c223d6605,
abstract = {{The arterial input function is crucial in pharmacokinetic analysis of dynamic contrast-enhanced MRI data. Among other artifacts in arterial input function quantification, the blood inflow effect and nonideal radiofrequency spoiling can induce large measurement errors with subsequent reduction of accuracy in the pharmacokinetic parameters. These errors were investigated for a 3D spoiled gradient-echo sequence using a pulsatile flow phantom and a total of 144 typical imaging settings. In the presence of large inflow effects, results showed poor average accuracy and large spread between imaging settings, when the standard spoiled gradient-echo signal equation was used in the analysis. For example, one of the investigated inflow conditions resulted in a mean error of about 40% and a spread, given by the coefficient of variation, of 20% for K-trans. Minimizing inflow effects by appropriate slice placement, combined with compensation for nonideal radiofrequency spoiling, significantly improved the results, but they remained poorer than without flow (e. g., 3-4 times larger coefficient of variation for K-trans). It was concluded that the 3D spoiled gradient-echo sequence is not optimal for accurate arterial input function quantification and that correction for nonideal radiofrequency spoiling in combination with inflow minimizing slice placement should be used to reduce the errors. Magn Reson Med 65:1670-1679, 2011. (C)2011 Wiley-Liss, Inc.}},
author = {{Garpebring, Anders and Wirestam, Ronnie and Ostlund, Nils and Karlsson, Mikael}},
issn = {{1522-2594}},
keywords = {{dynamic contrast-enhanced MRI; arterial input function; blood flow; effects; RF spoiling}},
language = {{eng}},
number = {{6}},
pages = {{1670--1679}},
publisher = {{John Wiley & Sons Inc.}},
series = {{Magnetic Resonance in Medicine}},
title = {{Effects of Inflow and Radiofrequency Spoiling on the Arterial Input Function in Dynamic Contrast-Enhanced MRI: A Combined Phantom and Simulation Study}},
url = {{http://dx.doi.org/10.1002/mrm.22760}},
doi = {{10.1002/mrm.22760}},
volume = {{65}},
year = {{2011}},
}