def _field_default(self):
rect_info = self.rectangles_info
field = mfield.MField()
# initialize Field II with parameters
field.field_init()
field.set_field('c', self.c)
field.set_field('fs', self.fs)
field.set_field('use_att', self.use_att)
field.set_field('att', self.att)
field.set_field('freq_att', self.freq_att)
field.set_field('att_f0', self.att_f0)
# create excitation
pulse, _ = util.gausspulse(self.excitation_fc,
self.excitation_bw / self.excitation_fc,
self.fs)
self._pulse = pulse
# read rect_info and create list of transmit
tx_apertures = []
for info in rect_info:
tx_info = info['tx_info']
if tx_info is not None:
tx_rectangles = tx_info['rectangles']
tx_centers = tx_info['centers']
tx_delays = tx_info['delays']
tx_apod = tx_info['apodizations']
tx_ele_delays = tx_info['ele_delays']
# create transmit aperture and set aperture parameters
tx = field.xdc_rectangles(tx_rectangles, tx_centers,
np.array([[0, 0, 300]]))
field.xdc_impulse(tx, pulse)
field.xdc_excitation(tx, np.array([1]))
field.xdc_focus_times(tx, np.zeros((1, 1)), tx_delays)
field.xdc_apodization(tx, np.zeros((1, 1)), tx_apod)
# set mathematical element delays
field.ele_delay(tx,
np.arange(len(tx_ele_delays)) + 1,
tx_ele_delays)
# add aperture to list
tx_apertures.append(tx)
self._tx_apertures = tx_apertures
return field
def _field_default(self):
field = mfield.MField()
# initialize Field II with parameters
field.field_init()
field.set_field('c', self.c)
field.set_field('fs', self.fs)
field.set_field('use_att', self.use_att)
field.set_field('att', self.att)
field.set_field('freq_att', self.freq_att)
field.set_field('att_f0', self.att_f0)
# create excitation
pulse, _ = util.gausspulse(self.excitation_fc, self.excitation_bw / self.excitation_fc, self.fs)
self._pulse = pulse
return field