TY - JOUR
T1 - Suppression of Grating Lobe Artifacts in Ultrasound Images Formed from Diverging Transmitting Beams by Modulation of Receiving Beams
AU - Ponnle, Akinlolu
AU - Hasegawa, Hideyuki
AU - Kanai, Hiroshi
N1 - Funding Information:
This study was partly supported by a Grant-in-Aid for Research from Japan Society for the Promotion of Science (2011-2013, No. 23360177 ).The study was approved by the Ethics Committee on Clinical Investigation, Graduate School of Engineering, Tohoku University, and was performed in accordance with the policy of the World Medical Association Declaration of Helsinki Ethical Principles for Medical Research involving Human Subjects. All subjects gave informed consent.
PY - 2013/4
Y1 - 2013/4
N2 - In linear array transducers, owing to regular spacing of the array elements, grating lobes exist in transmission and reception. In ultrasonic imaging involving the use of diverging (unfocused) transmitting beams and steered receiving beams by linear transducer arrays, aperture apodization and spatial combination of steered receiving beams from multiple transmissions are not sufficient to suppress receive-grating lobe artifacts. To further suppress receive-grating lobe artifacts in reconstructed B-mode images, we propose a technique of modulating the receiving beams by a factor that is governed by the envelope of a corresponding signal, which is formed by filtering the receiving beam with a zero-phase low-pass filter with a cut-off frequency that is determined by the receiving beam steering angle. This technique suppressed receive-grating lobe artifacts without significant loss in spatial resolution in offline reconstructed B-mode images from simulation, phantom and in vivo imaging of the carotid artery. In a simulation of point scatterers, a relative reduction in grating lobe artifacts of 40 dB was realized in images from diverging beam scanning.
AB - In linear array transducers, owing to regular spacing of the array elements, grating lobes exist in transmission and reception. In ultrasonic imaging involving the use of diverging (unfocused) transmitting beams and steered receiving beams by linear transducer arrays, aperture apodization and spatial combination of steered receiving beams from multiple transmissions are not sufficient to suppress receive-grating lobe artifacts. To further suppress receive-grating lobe artifacts in reconstructed B-mode images, we propose a technique of modulating the receiving beams by a factor that is governed by the envelope of a corresponding signal, which is formed by filtering the receiving beam with a zero-phase low-pass filter with a cut-off frequency that is determined by the receiving beam steering angle. This technique suppressed receive-grating lobe artifacts without significant loss in spatial resolution in offline reconstructed B-mode images from simulation, phantom and in vivo imaging of the carotid artery. In a simulation of point scatterers, a relative reduction in grating lobe artifacts of 40 dB was realized in images from diverging beam scanning.
KW - Bidirectional filtering
KW - Diverging transmitting beam
KW - Modulated receiving beam
KW - Receive-grating lobe
KW - Zero-phase low-pass filter
UR - http://www.scopus.com/inward/record.url?scp=84875109567&partnerID=8YFLogxK
U2 - 10.1016/j.ultrasmedbio.2012.10.019
DO - 10.1016/j.ultrasmedbio.2012.10.019
M3 - 学術論文
C2 - 23415288
AN - SCOPUS:84875109567
SN - 0301-5629
VL - 39
SP - 681
EP - 691
JO - Ultrasound in Medicine and Biology
JF - Ultrasound in Medicine and Biology
IS - 4
ER -