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Quantitative assessment of atrial regional function using motion estimation computed tomography.


ABSTRACT: We validated a novel image-based motion estimation computed tomographic (CT) technique (iME) to quantify atrial regional function in swine in vivo.Domestic swine (n = 8) underwent CT scan with intravenous contrast before and after median sternotomy where 15 to 30 glass beads were sutured to the atria to calculate the motion estimation error. Four-dimensional motion vector field was estimated using iME. Area change ratio (%AC) was calculated over the atrial endocardium to assess the surface deformation.The error between the measured and the calculated coordinates based on motion vector field was 0.76 ± 0.43 mm. The %AC was regionally heterogeneous. The %AC time course was significantly different between the right and the left atriums (P < 0.001) as well as between the right atrial appendage and the right atrial chamber (P = 0.004).Quantitative assessment of atrial regional function using iME is highly accurate. Image-based motion estimation computed tomographic (CT) technique can quantify subtle regional dysfunction that is not apparent in global functional indices such as ejection fraction.

SUBMITTER: Ashikaga H 

PROVIDER: S-EPMC4167165 | biostudies-literature | 2014 Sep-Oct

REPOSITORIES: biostudies-literature

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Quantitative assessment of atrial regional function using motion estimation computed tomography.

Ashikaga Hiroshi H   Cammin Jochen J   Tang Qiulin Q   Knudsen Karly K   Inoue Yuko Y   Fishman Elliot K EK   Taguchi Katsuyuki K  

Journal of computer assisted tomography 20140901 5


<h4>Objectives</h4>We validated a novel image-based motion estimation computed tomographic (CT) technique (iME) to quantify atrial regional function in swine in vivo.<h4>Materials and methods</h4>Domestic swine (n = 8) underwent CT scan with intravenous contrast before and after median sternotomy where 15 to 30 glass beads were sutured to the atria to calculate the motion estimation error. Four-dimensional motion vector field was estimated using iME. Area change ratio (%AC) was calculated over t  ...[more]

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