# create beam times (w/wrapping)
cur_time = args.start_time
timestamps = []
for i in range(args.num_beams_total):
timestamps.append(cur_time)
cur_time += prt
if cur_time >= args.end_time: cur_time = args.start_time
timestamps = np.array(timestamps, dtype="float32")
# precompute fixed-scatterer datasets
fixed_scatterers = create_fixed_datasets(args, control_points, amplitudes, spline_degree, knot_vector, timestamps)
# create two simulator instances - one for spline-only and one fixed-only
sim_fixed = RfSimulator("gpu")
sim_spline = RfSimulator("gpu")
sim_fixed.set_parameter("verbose", "0"); sim_spline.set_parameter("verbose", "0")
sim_fixed.set_print_debug(False); sim_spline.set_print_debug(False)
sim_fixed.set_parameter("sound_speed", "%f" % c0); sim_spline.set_parameter("sound_speed", "%f" % c0)
sim_fixed.set_parameter("phase_delay", "on"); sim_spline.set_parameter("phase_delay", "on")
sim_fixed.set_parameter("radial_decimation", "5"); sim_spline.set_parameter("radial_decimation", "5")
num_gpus = int(sim_fixed.get_parameter("num_cuda_devices"))
print "System has %d CUDA devices" % num_gpus
sim_fixed.set_parameter("gpu_device", "%d" % args.gpu_device_no)
sim_spline.set_parameter("gpu_device", "%d" % args.gpu_device_no)
print "Fixed simulator uses %s" % sim_fixed.get_parameter("cur_device_name")
print "Spline simulator uses %s" % sim_spline.get_parameter("cur_device_name")
# define excitation signal
t_vector = np.arange(-16/args.fc, 16/args.fc, 1.0/args.fs)
samples = np.array(gausspulse(t_vector, bw=args.bw, fc=args.fc), dtype="float32")
Compare GPU and CPU for a linear scan in the XZ plane
"""
if __name__ == "__main__":
parser = argparse.ArgumentParser(description=description)
parser.add_argument("h5_file", help="Hdf5 file with scatterers")
parser.add_argument("--x0", help="Left scan width", type=float, default=-1e-2)
parser.add_argument("--x1", help="Right scan width", type=float, default=1e-2)
parser.add_argument("--num_lines", type=int, default=16)
parser.add_argument("--device_no", help="GPU device no to use", type=int, default=0)
parser.add_argument("--line_length", help="Length of scanline", type=float, default=0.12)
args = parser.parse_args()
sim_cpu = RfSimulator("cpu")
sim_gpu = RfSimulator("gpu")
sim_gpu.set_parameter("gpu_device", "%d"%args.device_no)
with h5py.File(args.h5_file, "r") as f:
# load the fixed dataset if exists
if "data" in f:
scatterers_data = f["data"].value
print("Configuring %d fixed scatterers" % scatterers_data.shape[0])
sim_cpu.add_fixed_scatterers(scatterers_data)
sim_gpu.add_fixed_scatterers(scatterers_data)
# load the spline dataset if exists
if "spline_degree" in f:
amplitudes = f["amplitudes"].value
control_points = f["control_points"].value
knot_vector = f["knot_vector"].value
spline_degree = f["spline_degree"].value
def do_simulation(args):
if args.use_gpu:
sim = RfSimulator("gpu")
sim.set_parameter("gpu_device", "%d"%args.device_no)
gpu_name = sim.get_parameter("cur_device_name")
print "Using device %d: %s" % (args.device_no, gpu_name)
else:
sim = RfSimulator("cpu")
sim.set_parameter("verbose", "0")
with h5py.File(args.h5_file, "r") as f:
scatterers_data = f["data"][()]
sim.add_fixed_scatterers(scatterers_data)
print "The number of scatterers is %d" % scatterers_data.shape[0]
# configure simulation parameters
sim.set_parameter("sound_speed", "1540.0")
sim.set_parameter("radial_decimation", "10")
sim.set_parameter("phase_delay", "on")
sim.set_parameter("noise_amplitude", "%f" % args.noise_ampl)
# configure the RF excitation
fs = 80e6
ts = 1.0/fs
fc = 5.0e6
tc = 1.0/fc
t_vector = np.arange(-16*tc, 16*tc, ts)
bw = 0.3
samples = np.array(gausspulse(t_vector, bw=bw, fc=fc), dtype="float32")
center_index = int(len(t_vector)/2)
sim.set_excitation(samples, center_index, fs, fc)
# configure the beam profile
sim.set_analytical_beam_profile(1e-3, 1e-3)
for i, y in enumerate(np.linspace(-0.005, 0.005, 100)):
print(f"Simulating frame {i}")
# define the scan sequence
origins = np.zeros((args.num_lines, 3), dtype="float32")
origins[:,1] = y
origins[:,0] = np.linspace(args.x0, args.x1, args.num_lines)
x_axis = np.array([1.0, 0.0, 0.0])
z_axis = np.array([0.0, 0.0, 1.0])
directions = np.array(np.tile(z_axis, (args.num_lines, 1)), dtype="float32")
length = 0.06
lateral_dirs = np.array(np.tile(x_axis, (args.num_lines, 1)), dtype="float32")
timestamps = np.zeros((args.num_lines,), dtype="float32")
sim.set_scan_sequence(origins, directions, length, lateral_dirs, timestamps)
iq_lines = sim.simulate_lines()
bmode = np.array(abs(iq_lines), dtype="float32")
gain = 1
dyn_range = 40
normalize_factor = np.max(bmode.flatten())
bmode = 20*np.log10(gain*bmode/normalize_factor)
bmode = 255.0*(bmode+dyn_range)/dyn_range
# clamp to [0, 255]
bmode[bmode < 0] = 0.0
bmode[bmode > 255.0] = 255.0
fig = plt.figure(frameon=False)
fig.set_size_inches(2*bmode.shape[1], bmode.shape[0])
ax = plt.Axes(fig, [0., 0., 1., 1.])
ax.set_axis_off()
fig.add_axes(ax)
ax.imshow(np.real(abs(iq_lines)), aspect="auto", cmap=plt.get_cmap("gray"))
plt.savefig(f"sweep_{i:02d}.png", dpi=1)
plt.close(fig)
# Linear scan with three scatterers.
# Using a Gaussian analytic beam profile.
import sys
sys.path.append(".")
from pyrfsim import RfSimulator
import matplotlib.pyplot as plt
import matplotlib.cm as cm
from scipy.signal import gausspulse
import numpy as np
# Create and configure CPU simulator
device = 'cpu'
device = 'gpu'
sim = RfSimulator(device)
sim.set_parameter("verbose", "1")
sim.set_print_debug(True)
# Set general simulation parameters
sim.set_parameter("sound_speed", "1540.0")
if device == 'cpu': sim.set_parameter("num_cpu_cores", "all")
sim.set_parameter("radial_decimation", "20")
# Set scatterers
num_scatterers = 16
scatterers_data = np.zeros((num_scatterers, 4), dtype="float32")
scatterers_data[:, 0] = np.linspace(-.02, 0.02, num_scatterers)
scatterers_data[:, 2] = np.linspace(0.01, 0.16, num_scatterers)
scatterers_data[:, 3] = np.ones((num_scatterers, ))
# scatterers_data[:,3] = np.arange (1, num_scatterers + 1)
sim.add_fixed_scatterers(scatterers_data)
width = lambd # Width of element
height = 5 / 1000 # Height of element [m]
kerf = 0.05 / 1000 # Kerf (gap between elements) [m]
pitch = kerf + width # Pitch (center-to-center distance between elements) [m]
N_elements = 192 # Number of physical elements
no_sub_x = 1 # Number of sub-divisions in x-direction of elements
no_sub_y = 10 # Number of sub-divisions in y-direction of elements
# Create and configure GPU simulator
from pyrfsim import RfSimulator
sim = RfSimulator('gpu')
sim.set_print_debug(True)
sim.set_parameter('sound_speed', str(c))
sim.set_parameter('radial_decimation',
'1') # depth-direction downsampling factor
sim.set_parameter('phase_delay', 'on') # improves subsample accuracy
sim.set_parameter('use_elev_hack', 'off')
def subdivide(length, num):
delta = length * 1 / num
divisions = np.arange((-num // 2 + 1) * delta, (num // 2 + 1) * delta,
delta)
return divisions
# Arguments very similar to xdc_linear_array in Field II
def do_simulation(args):
if args.use_gpu:
sim = RfSimulator("gpu")
sim.set_parameter("gpu_device", "%d"%args.device_no)
gpu_name = sim.get_parameter("cur_device_name")
print "Using device %d: %s" % (args.device_no, gpu_name)
else:
sim = RfSimulator("cpu")
sim.set_parameter("verbose", "0")
with h5py.File(args.h5_file, "r") as f:
scatterers_data = f["data"].value
sim.add_fixed_scatterers(scatterers_data)
print "The number of scatterers is %d" % scatterers_data.shape[0]
# configure simulation parameters
sim.set_parameter("sound_speed", "1540.0")
sim.set_parameter("radial_decimation", "10")
sim.set_parameter("phase_delay", "on")
sim.set_parameter("noise_amplitude", "%f" % args.noise_ampl)
# configure the RF excitation
fs = 80e6
ts = 1.0/fs
fc = 5.0e6
tc = 1.0/fc
t_vector = np.arange(-16*tc, 16*tc, ts)
bw = 0.3
samples = np.array(gausspulse(t_vector, bw=bw, fc=fc), dtype="float32")
center_index = int(len(t_vector)/2)
sim.set_excitation(samples, center_index, fs, fc)
# define the scan sequence
origins = np.zeros((args.num_lines, 3), dtype="float32")
origins[:,0] = np.linspace(args.x0, args.x1, args.num_lines)
x_axis = np.array([1.0, 0.0, 0.0])
z_axis = np.array([0.0, 0.0, 1.0])
directions = np.array(np.tile(z_axis, (args.num_lines, 1)), dtype="float32")
length = 0.06
lateral_dirs = np.array(np.tile(x_axis, (args.num_lines, 1)), dtype="float32")
timestamps = np.zeros((args.num_lines,), dtype="float32")
sim.set_scan_sequence(origins, directions, length, lateral_dirs, timestamps)
# configure the beam profile
sim.set_analytical_beam_profile(1e-3, 1e-3)
frame_sim_times = []
for frame_no in range(args.num_frames):
start_time = time()
iq_lines = sim.simulate_lines()
frame_sim_times.append(time()-start_time)
if args.save_simdata_file != "":
with h5py.File(args.save_simdata_file, "w") as f:
f["sim_data_real"] = np.array(np.real(iq_lines), dtype="float32")
f["sim_data_imag"] = np.array(np.imag(iq_lines), dtype="float32")
print "Simulation output written to %s" % args.save_simdata_file
print "Simulation time: %f +- %f s (N=%d)" % (np.mean(frame_sim_times), np.std(frame_sim_times), args.num_frames)
if args.pdf_file != "" and not args.visualize:
import matplotlib as mpl
mpl.use("Agg")
if args.pdf_file != "" or args.visualize:
import matplotlib.pyplot as plt
num_samples, num_lines = iq_lines.shape
plt.figure(1, figsize=(18,9))
plt.subplot(1,2,1)
plt.plot(np.real(iq_lines[:, num_lines/2]))
plt.title("Middle RF line")
plt.subplot(1,2,2)
plt.imshow(np.real(abs(iq_lines)), aspect="auto", interpolation="nearest")
if args.pdf_file != "":
plt.savefig(args.pdf_file)
print "Image written to disk."
if args.visualize:
plt.show()
parser.add_argument("--sigma_elevational", help="Elevational beamwidth", type=float, default=1e-3)
parser.add_argument("--use_gpu", help="Perform simulations using the gpu_spline2 algorithm", action="store_true")
parser.add_argument("--save_pdf", help="Save pdf figures", action="store_true")
parser.add_argument("--visualize", help="Interactive figures", action="store_true")
args = parser.parse_args()
c0 = 1540.0
# Create and configure
if args.use_gpu:
print "Using GPU"
sim = RfSimulator("gpu")
else:
print "Using CPU"
sim = RfSimulator("cpu")
sim.set_parameter("num_cpu_cores", "all")
sim.set_parameter("verbose", "0")
sim.set_print_debug(False)
sim.set_parameter("sound_speed", "%f" % c0)
sim.set_parameter("radial_decimation", "30")
# Enable phase-delays for smooth curves
sim.set_parameter("phase_delay", "on")
# Set spline scatterers
with h5py.File(args.scatterer_file, "r") as f:
control_points = np.array(f["control_points"].value, dtype="float32")
amplitudes = np.array(f["amplitudes"].value, dtype="float32")
knot_vector = np.array(f["knot_vector"].value, dtype="float32")
spline_degree = int(f["spline_degree"].value)
parser.add_argument("--lut_file",
help="Use lookup table beam profile",
default="")
args = parser.parse_args()
res_buffer = ResultBuffer()
sim_types = ["gpu"]
if args.enable_cpu:
sim_types.append("cpu")
for sim_type in sim_types:
sim = RfSimulator(sim_type)
device_name = ""
if sim_type == "gpu":
sim.set_parameter("gpu_device", "%d" % args.device_no)
device_name = sim.get_parameter("cur_device_name")
elif sim_type == "cpu":
sim.set_parameter("num_cpu_cores", "%d" % args.num_cpu_cores)
res_buffer.add_msg("=== SIMULATION RESULTS WITH %s %s ===" %
(sim_type.upper(), device_name))
sim.set_parameter("verbose", "0")
sim.set_parameter("sound_speed", "1540.0")
sim.set_parameter("radial_decimation", "30")
sim.set_parameter("use_arc_projection", args.arc_proj)
res_buffer.add_msg("Arc projection: %s" % args.arc_proj)
sim.set_parameter("phase_delay", args.phase_delay)
res_buffer.add_msg("Complex phase delay: %s" % args.phase_delay)
# configure the RF excitation
ts = 1.0 / args.fs
action="store_true")
parser.add_argument("--visualize",
help="Interactive figures",
action="store_true")
args = parser.parse_args()
c0 = 1540.0
# Create and configure
if args.use_gpu:
print "Using GPU"
sim = RfSimulator("gpu")
else:
print "Using CPU"
sim = RfSimulator("cpu")
sim.set_parameter("num_cpu_cores", "all")
sim.set_parameter("verbose", "0")
sim.set_print_debug(False)
sim.set_parameter("sound_speed", "%f" % c0)
sim.set_parameter("radial_decimation", "30")
# Enable phase-delays for smooth curves
sim.set_parameter("phase_delay", "on")
# Set spline scatterers
with h5py.File(args.scatterer_file, "r") as f:
control_points = np.array(f["control_points"].value, dtype="float32")
amplitudes = np.array(f["amplitudes"].value, dtype="float32")
knot_vector = np.array(f["knot_vector"].value, dtype="float32")
spline_degree = int(f["spline_degree"].value)
if __name__ == "__main__":
parser = argparse.ArgumentParser()
parser.add_argument("--line_length", help="Length of scanline", type=float, default=0.1)
parser.add_argument("--fs", help="Sampling frequency [Hz]", type=float, default=50e6)
parser.add_argument("--fc", help="Pulse center frequency [Hz] (also demod. freq.)", type=float, default=5.0e6)
parser.add_argument("--bw", help="Pulse fractional bandwidth", type=float, default=0.2)
parser.add_argument("--sigma_lateral", help="Lateral beamwidth", type=float, default=0.5e-3)
parser.add_argument("--sigma_elevational", help="Elevational beamwidth", type=float, default=1e-3)
parser.add_argument("--num_lines", help="Number of IQ lines in scansequence", type=int, default=128)
parser.add_argument("--x0", help="Scanseq width in meters (left end)", type=float, default=-0.03)
parser.add_argument("--x1", help="Scanseq width in meters (right end)", type=float, default=0.03)
args = parser.parse_args()
# create and configure simulator
sim = RfSimulator("gpu")
sim.set_parameter("verbose", "0")
sim.set_print_debug(False)
sim.set_parameter("sound_speed", "1540.0")
sim.set_parameter("radial_decimation", "15")
sim.set_parameter("phase_delay", "on")
# define excitation signal
t_vector = np.arange(-16/args.fc, 16/args.fc, 1.0/args.fs)
samples = np.array(gausspulse(t_vector, bw=args.bw, fc=args.fc), dtype="float32")
center_index = int(len(t_vector)/2)
demod_freq = args.fc
sim.set_excitation(samples, center_index, args.fs, demod_freq)
# create linear scan sequence
origins = np.empty((args.num_lines, 3), dtype="float32")
directions = np.empty((args.num_lines, 3), dtype="float32")
# DEMO 1
# Linear scan with three scatterers.
# Using a Gaussian analytic beam profile.
import sys
sys.path.append(".")
from pyrfsim import RfSimulator
import matplotlib.pyplot as plt
import matplotlib.cm as cm
from scipy.signal import gausspulse
import numpy as np
# Create and configure CPU simulator
sim = RfSimulator("cpu")
sim.set_parameter("verbose", "1")
sim.set_print_debug(True)
# Set general simulation parameters
sim.set_parameter("sound_speed", "1540.0")
sim.set_parameter("num_cpu_cores", "all")
sim.set_parameter("radial_decimation", "20")
# Set scatterers
num_scatterers = 16
scatterers_data = np.zeros((num_scatterers, 4), dtype="float32")
scatterers_data[:,2] = np.linspace(0.01, 0.16, num_scatterers)
scatterers_data[:,3] = np.ones((num_scatterers,))
sim.add_fixed_scatterers(scatterers_data)
# Define excitation signal
fs = 50e6
ts = 1.0/fs
parser.add_argument("--phase_delay", choices=["on", "off"], default="on")
parser.add_argument("--enable_cpu", help="Also time CPU impl (slow)", action="store_true")
parser.add_argument("--lut_file", help="Use lookup table beam profile", default="")
args = parser.parse_args()
res_buffer = ResultBuffer()
sim_types = ["gpu"]
if args.enable_cpu:
sim_types.append("cpu")
for sim_type in sim_types:
sim = RfSimulator(sim_type)
device_name = ""
if sim_type == "gpu":
sim.set_parameter("gpu_device", "%d" % args.device_no)
device_name = sim.get_parameter("cur_device_name")
elif sim_type == "cpu":
sim.set_parameter("num_cpu_cores", "%d" % args.num_cpu_cores)
res_buffer.add_msg("=== SIMULATION RESULTS WITH %s %s ===" % (sim_type.upper(), device_name))
sim.set_parameter("verbose", "0")
sim.set_parameter("sound_speed", "1540.0")
sim.set_parameter("radial_decimation", "30")
sim.set_parameter("use_arc_projection", args.arc_proj)
res_buffer.add_msg("Arc projection: %s" % args.arc_proj)
sim.set_parameter("phase_delay", args.phase_delay)
res_buffer.add_msg("Complex phase delay: %s" % args.phase_delay)
# configure the RF excitation
ts = 1.0/args.fs
tc = 1.0/args.fc
def do_simulation(args):
if args.use_gpu:
sim = RfSimulator("gpu")
sim.set_parameter("gpu_device", "%d"%args.device_no)
gpu_name = sim.get_parameter("cur_device_name")
print("Using device %d: %s" % (args.device_no, gpu_name))
else:
sim = RfSimulator("cpu")
sim.set_parameter("verbose", "0")
with h5py.File(args.h5_file, "r") as f:
scatterers_data = f["data"].value # TODO: inspect type
sim.add_fixed_scatterers(scatterers_data)
print("The number of scatterers is %d" % scatterers_data.shape[0])
# configure simulation parameters
sim.set_parameter("sound_speed", "1540.0")
sim.set_parameter("radial_decimation", "10")
sim.set_parameter("phase_delay", "on")
sim.set_parameter("noise_amplitude", "%f" % args.noise_ampl)
# configure the RF excitation
fs = 80e6
ts = 1.0/fs
fc = 5.0e6
tc = 1.0/fc
t_vector = np.arange(-16*tc, 16*tc, ts)
bw = 0.3
samples = np.array(gausspulse(t_vector, bw=bw, fc=fc), dtype="float32")
center_index = int(len(t_vector)/2)
sim.set_excitation(samples, center_index, fs, fc)
# define the scan sequence
origins = np.zeros((args.num_lines, 3), dtype="float32")
origins[:,0] = np.linspace(args.x0, args.x1, args.num_lines)
x_axis = np.array([1.0, 0.0, 0.0])
z_axis = np.array([0.0, 0.0, 1.0])
directions = np.array(np.tile(z_axis, (args.num_lines, 1)), dtype="float32")
length = 0.06
lateral_dirs = np.array(np.tile(x_axis, (args.num_lines, 1)), dtype="float32")
timestamps = np.zeros((args.num_lines,), dtype="float32")
sim.set_scan_sequence(origins, directions, length, lateral_dirs, timestamps)
# configure the beam profile
sim.set_analytical_beam_profile(1e-3, 1e-3)
frame_sim_times = []
for frame_no in range(args.num_frames):
start_time = time()
iq_lines = sim.simulate_lines()
frame_sim_times.append(time()-start_time)
if args.save_simdata_file != "":
with h5py.File(args.save_simdata_file, "w") as f:
f["sim_data_real"] = np.array(np.real(iq_lines), dtype="float32")
f["sim_data_imag"] = np.array(np.imag(iq_lines), dtype="float32")
print("Simulation output written to %s" % args.save_simdata_file)
print("Simulation time: %f +- %f s (N=%d)" % (np.mean(frame_sim_times), np.std(frame_sim_times), args.num_frames))
if args.pdf_file != "" and not args.visualize:
import matplotlib as mpl
mpl.use("Agg")
if args.pdf_file != "" or args.visualize:
num_samples, num_lines = iq_lines.shape
center_data = abs (iq_lines[:, num_lines//2].real)
data = abs (iq_lines)
# data = 20 * np.log10(1e-2 + data / data.mean ())
import matplotlib.pyplot as plt
print ('iq_lines.shape = (num_samples: {}, num_lines: {})'.format (num_samples, num_lines))
fig = plt.figure(1, figsize=(24, 12))
# fig = plt.figure(1, figsize=(9, 6))
ax = plt.subplot(1,2,1)
plt.plot(center_data, color=(153/255,102/255,204/255))
plt.xlabel ('Depth', fontsize=14, labelpad=15)
plt.ylabel ('Amplitude', fontsize=14, labelpad=15)
plt.yticks ([])
plt.grid ()
plt.title ('Middle RF-Line', fontsize=16, pad=15)
for side in ['top', 'right', 'left']:
ax.spines[side].set_visible (False)
ax = plt.subplot(1,2,2)
image = plt.imshow (data, cmap='gray', aspect=2, interpolation="nearest")
# cbar = fig.colorbar (image)
# cbar.set_label (' (dB)', fontsize=12)
plt.xlabel ('Width', fontsize=14, labelpad=15)
plt.ylabel ('Depth', fontsize=14, labelpad=15)
from os import path
name = path.basename (args.h5_file).split ('.')[0].replace ('_', ' ').title ()
plt.title ('Simulated "{}"'.format (name), fontsize=16, pad=15)
plt.grid ()
plt.tick_params (axis='both', which='both', bottom=True, top=False,
labelbottom=True, left=True, right=False, labelleft=True)
# cbar.ax.tick_params (axis='y', which='both', bottom=False, top=False,
# labelbottom=False, left=False, right=False, labelright=True)
# for side in ['top', 'right', 'bottom', 'left']:
# cbar.ax.spines[side].set_visible (False)
for side in ['top', 'right', 'bottom', 'left']:
ax.spines[side].set_visible (False)
# plt.xticks (tuple (np.arange (0, num_lines, 50)) + (num_lines,))
for side in ['bottom', 'left']:
ax.spines[side].set_position(('outward', 1))
if args.pdf_file != "":
plt.savefig(args.pdf_file)
print("Image written to disk.")
if args.visualize:
plt.show()
timestamps = []
for i in range(args.num_beams_total):
timestamps.append(cur_time)
cur_time += prt
if cur_time >= args.end_time: cur_time = args.start_time
timestamps = np.array(timestamps, dtype="float32")
# precompute fixed-scatterer datasets
fixed_scatterers = create_fixed_datasets(args, control_points, amplitudes,
spline_degree, knot_vector,
timestamps)
# create two simulator instances - one for spline-only and one fixed-only
sim_fixed = RfSimulator("gpu")
sim_spline = RfSimulator("gpu")
sim_fixed.set_parameter("verbose", "0")
sim_spline.set_parameter("verbose", "0")
sim_fixed.set_print_debug(False)
sim_spline.set_print_debug(False)
sim_fixed.set_parameter("sound_speed", "%f" % c0)
sim_spline.set_parameter("sound_speed", "%f" % c0)
sim_fixed.set_parameter("phase_delay", "on")
sim_spline.set_parameter("phase_delay", "on")
sim_fixed.set_parameter("radial_decimation", "5")
sim_spline.set_parameter("radial_decimation", "5")
num_gpus = int(sim_fixed.get_parameter("num_cuda_devices"))
print("System has %d CUDA devices" % num_gpus)
sim_fixed.set_parameter("gpu_device", "%d" % args.gpu_device_no)
sim_spline.set_parameter("gpu_device", "%d" % args.gpu_device_no)
print("Fixed simulator uses %s" %
default=16,
help="Decimation when drawing RF lines")
parser.add_argument("--device_no",
help="GPU device no to use",
type=int,
default=0)
parser.add_argument("--no_gpu",
action="store_true",
help="Use CPU instead of GPU")
args = parser.parse_args()
if args.no_gpu:
sim = RfSimulator("cpu")
else:
sim = RfSimulator("gpu")
sim.set_parameter("gpu_device", "%d" % args.device_no)
with h5py.File(args.h5_file, "r") as f:
scatterers_data = f["data"].value
sim.add_fixed_scatterers(scatterers_data)
print "The number of scatterers is %d" % scatterers_data.shape[0]
# configure simulation parameters
sim.set_parameter("sound_speed", "1540.0")
sim.set_parameter("phase_delay", "on")
sim.set_parameter("verbose", "0")
# avoid ugly part on top
sim.set_parameter("use_arc_projection", "off")
# use no radial decimation since we want to draw nice
implementations.
"""
if __name__ == '__main__':
parser = argparse.ArgumentParser(description=description)
parser.add_argument("--num_scatterers", type=int, default=1000000)
parser.add_argument("--num_lines", type=int, default=192)
parser.add_argument("--num_frames", help="Each frame is equal, but can be used to test performance", type=int, default=1)
parser.add_argument("--visualize", help="Visualize the middle RF line", action="store_true")
parser.add_argument("--save_pdf", help="Save .pdf image", action="store_true")
parser.add_argument("--device_no", help="GPU device no to use", type=int, default=0)
parser.add_argument("--store_kernel_debug", help="Store kernel timing info", action="store_true")
args = parser.parse_args()
sim = RfSimulator("gpu")
sim.set_parameter("gpu_device", "%d"%args.device_no)
sim.set_parameter("radial_decimation", "30")
sim.set_parameter("verbose", "0")
if args.store_kernel_debug:
sim.set_parameter("store_kernel_details", "on")
# configure scatterers (in a 3D cube)
x0 = -0.04; x1 = 0.04
y0 = -0.04; y1 = 0.04
z0 = 0.02; z1 = 0.10
scatterers_data = np.empty((args.num_scatterers, 4), dtype="float32")
scatterers_data[:,0] = np.random.uniform(low=x0, high=x1, size=(args.num_scatterers,))
scatterers_data[:,1] = np.random.uniform(low=y0, high=y1, size=(args.num_scatterers,))
scatterers_data[:,2] = np.random.uniform(low=z0, high=z1, size=(args.num_scatterers,))
scatterers_data[:,3] = np.random.uniform(low=0.0, high=1.0, size=(args.num_scatterers,))
sim.add_fixed_scatterers(scatterers_data)
c0 = 1540.0
prt = 1.0 / args.prf
origin = np.array([0.0, 0.0, -5e-3]) # beam origin
with h5py.File(args.scatterer_file, "r") as f:
control_points = f["control_points"].value
amplitudes = f["amplitudes"].value
knot_vector = f["knot_vector"].value
spline_degree = int(f["spline_degree"].value
) # C++ interface expects strictly int type
num_cs = control_points.shape[1]
print("Loaded spline phantom with %d control points" % num_cs)
# create and configure
sim = RfSimulator("gpu")
sim.set_parameter("verbose", "0")
sim.set_print_debug(False)
sim.set_parameter("sound_speed", "%f" % c0)
sim.set_parameter("radial_decimation", "%d" % args.rad_decimation)
sim.set_parameter("phase_delay", "on")
# define excitation signal
t_vector = np.arange(-16 / args.fc, 16 / args.fc, 1.0 / args.fs)
samples = np.array(gausspulse(t_vector, bw=args.bw, fc=args.fc),
dtype="float32")
center_index = int(len(t_vector) / 2)
demod_freq = args.fc
sim.set_excitation(samples, center_index, args.fs, demod_freq)
# configure analytical beam profile
sim.set_analytical_beam_profile(args.sigma_lateral, args.sigma_elevational)
height = 5 / 1000 # Height of element [m]
kerf = 0.05 / 1000 # Kerf (gap between elements) [m]
pitch = kerf + width # Pitch (center-to-center distance between elements) [m]
N_elements = 192 # Number of physical elements
no_sub_x = 5 # Number of sub-divisions in x-direction of elements
no_sub_y = 5 # Number of sub-divisions in y-direction of elements
# Create and configure GPU simulator
from pyrfsim import RfSimulator
sim = RfSimulator ('gpu')
sim.set_print_debug (True)
sim.set_parameter ('sound_speed', str (c))
sim.set_parameter ('radial_decimation', '1') # depth-direction downsampling factor
sim.set_parameter ('phase_delay', 'on') # improves subsample accuracy
sim.set_parameter ('use_elev_hack', 'off')
def subdivide (length, num):
delta = length * 1/num
divisions = np.arange ((-num//2 + 1) * delta, (num//2 + 1) * delta, delta)
return divisions
# Arguments very similar to xdc_linear_array in Field II
def linear_transducer (N_elements, width, height, kerf, no_sub_x=1, no_sub_y=1, as_array=False):
'''Calculates the origin positions of the (sub-)elements in a linear array transducer.'''
help="Number of IQ lines in scansequence",
type=int,
default=128)
parser.add_argument("--x0",
help="Scanseq width in meters (left end)",
type=float,
default=-0.03)
parser.add_argument("--x1",
help="Scanseq width in meters (right end)",
type=float,
default=0.03)
args = parser.parse_args()
# create and configure simulator
sim = RfSimulator("gpu")
sim.set_parameter("verbose", "0")
sim.set_print_debug(False)
sim.set_parameter("sound_speed", "1540.0")
sim.set_parameter("radial_decimation", "15")
sim.set_parameter("phase_delay", "on")
# define excitation signal
t_vector = np.arange(-16 / args.fc, 16 / args.fc, 1.0 / args.fs)
samples = np.array(gausspulse(t_vector, bw=args.bw, fc=args.fc),
dtype="float32")
center_index = int(len(t_vector) / 2)
demod_freq = args.fc
sim.set_excitation(samples, center_index, args.fs, demod_freq)
# create linear scan sequence
origins = np.empty((args.num_lines, 3), dtype="float32")
def do_simulation(args):
if args.use_gpu:
sim = RfSimulator("gpu")
sim.set_parameter("gpu_device", "%d" % args.device_no)
gpu_name = sim.get_parameter("cur_device_name")
print "Using device %d: %s" % (args.device_no, gpu_name)
else:
sim = RfSimulator("cpu")
sim.set_parameter("verbose", "0")
with h5py.File(args.h5_file, "r") as f:
scatterers_data = f["data"][()]
sim.add_fixed_scatterers(scatterers_data)
print "The number of scatterers is %d" % scatterers_data.shape[0]
# configure simulation parameters
sim.set_parameter("sound_speed", "1540.0")
sim.set_parameter("radial_decimation", "10")
sim.set_parameter("phase_delay", "on")
sim.set_parameter("noise_amplitude", "%f" % args.noise_ampl)
# configure the RF excitation
fs = 80e6
ts = 1.0 / fs
fc = 5.0e6
tc = 1.0 / fc
t_vector = np.arange(-16 * tc, 16 * tc, ts)
bw = 0.3
samples = np.array(gausspulse(t_vector, bw=bw, fc=fc), dtype="float32")
center_index = int(len(t_vector) / 2)
sim.set_excitation(samples, center_index, fs, fc)
# define the scan sequence
origins = np.zeros((args.num_lines, 3), dtype="float32")
origins[:, 0] = np.linspace(args.x0, args.x1, args.num_lines)
x_axis = np.array([1.0, 0.0, 0.0])
z_axis = np.array([0.0, 0.0, 1.0])
directions = np.array(np.tile(z_axis, (args.num_lines, 1)),
dtype="float32")
length = 0.06
lateral_dirs = np.array(np.tile(x_axis, (args.num_lines, 1)),
dtype="float32")
timestamps = np.zeros((args.num_lines, ), dtype="float32")
sim.set_scan_sequence(origins, directions, length, lateral_dirs,
timestamps)
# configure the beam profile
sim.set_analytical_beam_profile(1e-3, 1e-3)
frame_sim_times = []
for frame_no in range(args.num_frames):
start_time = time()
iq_lines = sim.simulate_lines()
frame_sim_times.append(time() - start_time)
if args.save_simdata_file != "":
with h5py.File(args.save_simdata_file, "w") as f:
f["sim_data_real"] = np.array(np.real(iq_lines), dtype="float32")
f["sim_data_imag"] = np.array(np.imag(iq_lines), dtype="float32")
print "Simulation output written to %s" % args.save_simdata_file
print "Simulation time: %f +- %f s (N=%d)" % (
np.mean(frame_sim_times), np.std(frame_sim_times), args.num_frames)
if args.pdf_file != "" and not args.visualize:
import matplotlib as mpl
mpl.use("Agg")
if args.pdf_file != "" or args.visualize:
import matplotlib.pyplot as plt
num_samples, num_lines = iq_lines.shape
plt.figure(1, figsize=(18, 9))
plt.subplot(1, 2, 1)
plt.plot(np.real(iq_lines[:, num_lines / 2]))
plt.title("Middle RF line")
plt.subplot(1, 2, 2)
plt.imshow(np.real(abs(iq_lines)),
aspect="auto",
interpolation="nearest")
if args.pdf_file != "":
plt.savefig(args.pdf_file)
print "Image written to disk."
if args.visualize:
plt.show()
if __name__ == "__main__":
parser = argparse.ArgumentParser(description=description)
parser.add_argument("--h5_file", help="Hdf5 file with [fixed] scatterers", default="../generated_phantoms/carotid_plaque.h5")
parser.add_argument("--x0", help="Left scan width", type=float, default=-0.08)
parser.add_argument("--x1", help="Right scan width", type=float, default=0.076)
parser.add_argument("--num_lines", type=int, help="Total number of B-mode lines", default=512)
parser.add_argument("--tx_decimation", type=int, default=16, help="Decimation when drawing RF lines")
parser.add_argument("--device_no", help="GPU device no to use", type=int, default=0)
parser.add_argument("--no_gpu", action="store_true", help="Use CPU instead of GPU")
args = parser.parse_args()
if args.no_gpu:
sim = RfSimulator("cpu")
else:
sim = RfSimulator("gpu")
sim.set_parameter("gpu_device", "%d"%args.device_no)
with h5py.File(args.h5_file, "r") as f:
scatterers_data = f["data"].value
sim.add_fixed_scatterers(scatterers_data)
print "The number of scatterers is %d" % scatterers_data.shape[0]
# configure simulation parameters
sim.set_parameter("sound_speed", "1540.0")
sim.set_parameter("phase_delay", "on")
sim.set_parameter("verbose", "0")
# avoid ugly part on top
sim.set_parameter("use_arc_projection", "off")
# use no radial decimation since we want to draw nice