2D Tissue Tracking Systemの 臨床応用 - 日立メディコ
2D Tissue Tracking Systemの 臨床応用 - 日立メディコ
2D Tissue Tracking Systemの 臨床応用 - 日立メディコ
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<strong>2D</strong> <br />
StrainStrain<br />
Strain<strong>2D</strong><br />
<br />
A novel tissue-tracking system that enables automatic assessment of two-dimensional strain of left ventricle segments<br />
simultaneously from gray-scale digital echocardiography images has been developed by Hitachi Medical Corporation. We<br />
have validated its accuracy in an animal study and then assessed this new technique in the clinical images. This report<br />
provide the current usefulness of the <strong>2D</strong> <strong>Tissue</strong> <strong>Tracking</strong> technique, and future direction of this new technique.<br />
Key Words: <strong>2D</strong> <strong>Tissue</strong> <strong>Tracking</strong> System, Echocardiography, LV Wall Thickening<br />
<br />
StrainStrain rate<br />
<br />
1) <br />
<br />
<br />
Strain<br />
3<br />
<strong>2D</strong> <br />
<br />
StrainStrain<br />
rate<br />
Strain<br />
<br />
(1)<br />
Strain<br />
<strong>2D</strong><br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
k(u,v,t 1 ) F(x,y,t 0)F(xu,yv,t 1 )<br />
x,y<br />
F2x,y<br />
t 0 t 1 <br />
uv0.1mm<br />
p19p22<br />
<br />
<br />
<br />
(WT)<br />
Wall motion<br />
10 MEDIX VOL.43
score 2)5) <br />
<br />
<br />
WT<br />
<br />
WT<br />
<br />
<strong>2D</strong><br />
<br />
StrainWT<br />
6) 6<br />
EUB-6500()24MHz<br />
<br />
(79131/S)<br />
AVIMO<br />
<strong>2D</strong><br />
<br />
<br />
3<br />
Strain WT<br />
<br />
<strong>2D</strong><br />
Strain<br />
Strain<br />
(r=0.92p0.0001)(2)Strain<br />
(40g/ml/kg)(22.95.6<br />
vs. 14.72.5p0.05)(3)<br />
<br />
<br />
<strong>2D</strong><br />
WT<br />
(WT) 7) <br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
MEDIX VOL.43 11
35(57.6)<br />
EUB-6500()24MHz<br />
(LAX) <br />
(SAX)(A4C)<br />
<br />
3<br />
GoodFair<br />
poor<strong>2D</strong><br />
StrainLAX<br />
SAXA4C2<br />
<br />
LV<br />
2Strain<br />
(4)<br />
<br />
WT WT(maxmum<br />
thickness - minimum thickness) 100 /minimum<br />
thickness<strong>2D</strong><br />
WTWT<br />
<br />
35105<br />
55Good46fair4poor<br />
<strong>2D</strong><br />
strainWT<br />
(5)(r0.89p0.001mean<br />
difference 0.5013.09)<br />
good(r0.94p0.001mean<br />
difference 0.8610.2)fair(r0.82p<br />
0.001mean difference 0.0616.78)<br />
<strong>2D</strong><br />
<strong>2D</strong><br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<strong>2D</strong><br />
<br />
Strain<br />
(6)<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<strong>2D</strong><br />
Strain<br />
<br />
<br />
<br />
12 MEDIX VOL.43
WT<br />
Strain<br />
<br />
1) Urheim S, et al : Myocardial strain by Doppler<br />
echocardiography : validation of a new method to<br />
quantify regional myocardial function. Circulation, 102<br />
: 1158-1164, 2000.<br />
2) Feneley MP, et al : Validity of echocardiographic<br />
deterination of left ventricular systolic wall thickening.<br />
Circulation, 70 : 226-232, 1984.<br />
3) Visser CA, et al : Apex two dimensional echocardiography<br />
: alternative approach to quantitation of acute<br />
myocardial infarction. Br Heart J, 47 : 461-467, 1982.<br />
4) Parisi AF, et al : Quantitative detection of regional left<br />
ventricular contraction abnormalities by two-dimensional<br />
echocardiography, II : accuracy in coronary<br />
artery disease. Circulation, 63(4) : 761-767, 1981.<br />
5) Moynihan PF, et al : Quantitative detection of regional<br />
left ventricular contraction abnormalities by twodimensional<br />
echocardiography, I : analysis of methods.<br />
Circulation, 63(4) : 752-760, 1981.<br />
6) Toyoda T, et al : Assessment of regional myocardial<br />
strain by a novel automated tracking system from digital<br />
image files. J Am Soc Echocardiogr, 17 : 1234-1238,<br />
2004.<br />
7) Sukmawan, et al : Automatic quantification of left ventricular<br />
systolic wall thickening using two-dimensional<br />
strain assessed by a novel tissue-tracking system. J<br />
Echocardiogr, 3 : 27-32, 2005.<br />
MEDIX VOL.43 13
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