Example 19: Dual-Probe Pulse-Echo — Moved TX/RX and show()¶

Pitch-catch configuration: one linear array transmits a focused beam and a second identical array, tilted 30° with transform(), receives from an oblique angle — the geometry behind vector Doppler and multi-perspective imaging research.

What you will learn¶

Rotating an aperture about the target point with a single 4×4 transform
sim.show(scatterers, amplitudes) — 3-D preview of both apertures
Pulse-echo RF between two different apertures (Reception(tx, rx))

Output¶

Setup: TX, tilted RX, scatterers Pitch-catch RF

Run it¶

uv run examples/example19_dualprobe_reception_show.py

Key code¶

import numpy as np
import esdiva.transducers as transducers
from esdiva.reception import Reception

tx = transducers.Domino()
tx.compute_delays(focus_mm=[0, 0, 20])

rx = transducers.Domino()
th = np.deg2rad(30)
R = np.array([[np.cos(th), 0, np.sin(th)], [0, 1, 0], [-np.sin(th), 0, np.cos(th)]])
T = np.eye(4)
T[:3, :3] = R
T[:3, 3] = target_mm - R @ target_mm    # rotate about the target, not the origin
rx.transform(T)

sim = Reception(tx, rx, c=1540, fs=200e6, excitation=excitation)
sim.show(scatterer_pos, scatterer_amp)  # 3-D preview
rf, coords = sim(scatterer_pos, scatterer_amp)

View full script on GitHub