High-Frame-Rate Doppler Ultrasound Using a Repeated Transmit Sequence
AbstractThe maximum detectable velocity of high-frame-rate color flow Doppler ultrasound is limited by the imaging frame rate when using coherent compounding techniques. Traditionally, high quality ultrasonic images are produced at a high frame rate via coherent compounding of steered plane wave reconstructions. However, this compounding operation results in an effective downsampling of the slow-time signal, thereby artificially reducing the frame rate. To alleviate this effect, a new transmit sequence is introduced where each transmit angle is repeated in succession. This transmit sequence allows for direct comparison between low resolution, pre-compounded frames at a short time interval in ways that are resistent to sidelobe motion. Use of this transmit sequence increases the maximum detectable velocity by a scale factor of the transmit sequence length. The performance of this new transmit sequence was evaluated using a rotating cylindrical phantom and compared with traditional methods using a 15-MHz linear array transducer. Axial velocity estimates were recorded for a range of
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Podkowa, A.S.; Oelze, M.L.; Ketterling, J.A. High-Frame-Rate Doppler Ultrasound Using a Repeated Transmit Sequence. Appl. Sci. 2018, 8, 227.
Podkowa AS, Oelze ML, Ketterling JA. High-Frame-Rate Doppler Ultrasound Using a Repeated Transmit Sequence. Applied Sciences. 2018; 8(2):227.Chicago/Turabian Style
Podkowa, Anthony S.; Oelze, Michael L.; Ketterling, Jeffrey A. 2018. "High-Frame-Rate Doppler Ultrasound Using a Repeated Transmit Sequence." Appl. Sci. 8, no. 2: 227.
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