TY - JOUR
T1 - Speckle tracking ultrasound is independent of insonation angle and gain: an in vitro investigation of agreement with sonomicrometry
AU - Sivesgaard, Kim
AU - Christensen, Sara Dahl
AU - Nygaard, Hans
AU - Hasenkam, J Michael
AU - Sloth, Erik
PY - 2009
Y1 - 2009
N2 - OBJECTIVE: It has been shown that speckle tracking ultrasound (STU) is capable of measuring peak strain accurately in vitro over a range of compression rates and amplitudes. The aim of this study was to investigate the influence of different angles of insonation with a range of scanner settings. METHODS: A tissue-mimicking phantom was cyclically deformed to imitate the beating heart. With different combinations of scanner settings, strain was measured by STU using sonomicrometry as reference. RESULTS: Over a majority of parameter combinations, speckle tracking measured strain accurately. However, a combination of large echocardiographic image displacements, low frame rates, and small sector depths resulted in increased difference between STU and sonomicrometry. The angle of insonation and gain setting did not affect STU. CONCLUSION: Despite the limitations exhibited by image displacement, frame rate, and sector depth, STU remains a promising technique for angle-independent assessment of strain.
AB - OBJECTIVE: It has been shown that speckle tracking ultrasound (STU) is capable of measuring peak strain accurately in vitro over a range of compression rates and amplitudes. The aim of this study was to investigate the influence of different angles of insonation with a range of scanner settings. METHODS: A tissue-mimicking phantom was cyclically deformed to imitate the beating heart. With different combinations of scanner settings, strain was measured by STU using sonomicrometry as reference. RESULTS: Over a majority of parameter combinations, speckle tracking measured strain accurately. However, a combination of large echocardiographic image displacements, low frame rates, and small sector depths resulted in increased difference between STU and sonomicrometry. The angle of insonation and gain setting did not affect STU. CONCLUSION: Despite the limitations exhibited by image displacement, frame rate, and sector depth, STU remains a promising technique for angle-independent assessment of strain.
U2 - 10.1016/j.echo.2009.04.028
DO - 10.1016/j.echo.2009.04.028
M3 - Journal article
C2 - 19515531
SN - 0894-7317
VL - 22
SP - 852
EP - 858
JO - Journal of the American Society of Echocardiography
JF - Journal of the American Society of Echocardiography
IS - 7
ER -