Limits...
Free-breathing myocardial T2 measurements at 1.5T

View Article: PubMed Central - HTML

AUTOMATICALLY GENERATED EXCERPT
Please rate it.

T2 values are usually estimated by performing several black blood Fast Spin Echo (FSE) sequences with different Echo Times (TE), what requires multiple breath holds... Two sets of ten images with different TE were acquired with a conventional cardiac-gated black blood FSE sequence at mid-cavity short axis view, one during breath hold and the other one during free breathing... Using physiological signals extracted from the respiratory belt, the method presented in was used to obtain an artefact-free proton density weighted image r0 and a T2 map from the free breathing raw data set... For the sake of comparison, six segments were drawn on the left ventricle myocardium... The mean value of each ROI was then used to get 6 myocardial T2 values... Like at 3T, there was no significant differences between the two sets of myocardial T2 values (paired Student T-test, p=0.17)... The free breathing T2 maps were in good agreement with the breath-held ones and respiratory artefacts were widely reduced in r0 (Fig. 1)... The proposed free breathing method allows performing accurate T2 mapping at 1.5T with no additional acquisition time.

No MeSH data available.


T2 maps obtained on one volunteer in breath hold (left) and in free breathing (right)
© Copyright Policy - open-access
Related In: Results  -  Collection


getmorefigures.php?uid=PMC3106515&req=5

Figure 1: T2 maps obtained on one volunteer in breath hold (left) and in free breathing (right)

Mentions: Like at 3T, there was no significant differences between the two sets of myocardial T2 values (paired Student T-test, p=0.17). The free breathing T2 maps were in good agreement with the breath-held ones and respiratory artefacts were widely reduced in r0 (Fig. 1).


Free-breathing myocardial T2 measurements at 1.5T
T2 maps obtained on one volunteer in breath hold (left) and in free breathing (right)
© Copyright Policy - open-access
Related In: Results  -  Collection

Show All Figures
getmorefigures.php?uid=PMC3106515&req=5

Figure 1: T2 maps obtained on one volunteer in breath hold (left) and in free breathing (right)
Mentions: Like at 3T, there was no significant differences between the two sets of myocardial T2 values (paired Student T-test, p=0.17). The free breathing T2 maps were in good agreement with the breath-held ones and respiratory artefacts were widely reduced in r0 (Fig. 1).

View Article: PubMed Central - HTML

AUTOMATICALLY GENERATED EXCERPT
Please rate it.

T2 values are usually estimated by performing several black blood Fast Spin Echo (FSE) sequences with different Echo Times (TE), what requires multiple breath holds... Two sets of ten images with different TE were acquired with a conventional cardiac-gated black blood FSE sequence at mid-cavity short axis view, one during breath hold and the other one during free breathing... Using physiological signals extracted from the respiratory belt, the method presented in was used to obtain an artefact-free proton density weighted image r0 and a T2 map from the free breathing raw data set... For the sake of comparison, six segments were drawn on the left ventricle myocardium... The mean value of each ROI was then used to get 6 myocardial T2 values... Like at 3T, there was no significant differences between the two sets of myocardial T2 values (paired Student T-test, p=0.17)... The free breathing T2 maps were in good agreement with the breath-held ones and respiratory artefacts were widely reduced in r0 (Fig. 1)... The proposed free breathing method allows performing accurate T2 mapping at 1.5T with no additional acquisition time.

No MeSH data available.