Figure 2From: A 63 element 1.75 dimensional ultrasound phased array for the treatment of benign prostatic hyperplasiaOff-axis focusing has a direct impact on the grating lobe level. Increasing the steering angle by changing the focal point position in the x direction increases the grating lobe level. For a focus aimed at (0.2, 0, 5) and (0.5, 0, 5) cm, a fair grating lobe level of about -12dB was observed, as seen in (a) and (b), respectively.Back to article page