Live View

This demo illustrates how to acquire OCT data and display it live on a user interface. The demo further shows how to switch between different scan types, allowing the user to change between raster and radial scans on demand using the keyboard.

Raster scan display.

Radial scan display, interrupted partway through acquisition to resume the raster scan.

Changing Scan Types

def _handle_keypress(self, e):
    if e.key() == Qt.Key.Key_1:
        print('switch to raster scan')

        # clear volume
        with self._stack_tensor_endpoint.tensor as volume:
            volume[:] = 0
        # invalidate all B-scans
        self._stack_widget.notify_segments(range(self._raster_scan.config.bscans_per_volume))

        self._engine.scan_queue.interrupt(self._raster_scan)

    elif e.key() == Qt.Key.Key_2:
        print('radial to radial scan')

        # clear volume
        with self._radial_tensor_endpoint.tensor as volume:
            volume[:] = 0
        # invalidate all B-scans
        self._radial_widget.notify_segments(range(self._radial_scan.config.bscans_per_volume))

        self._engine.scan_queue.interrupt(self._radial_scan)

    elif e.key() == Qt.Key.Key_Q:
        self._engine.stop()

Configure Radial Scan Formatting

rfec = RadialFormatExecutorConfig()
rfec.sample_slice = cfec.sample_slice
rfec.volume_xy_extent = [Range(cfg.scan_dimension, -cfg.scan_dimension), Range(-cfg.scan_dimension, cfg.scan_dimension)]
rfec.segment_rt_extent = (radial_sc.bscan_extent, radial_sc.volume_extent)
rfec.radial_segments_per_volume = radial_sc.bscans_per_volume
rfec.radial_records_per_segment = radial_sc.ascans_per_bscan

rfe = RadialFormatExecutor()
rfe.initialize(rfec)
radial_tensor_endpoint = RadialDeviceTensorEndpoint(rfe, (raster_sc.bscans_per_volume, raster_sc.ascans_per_bscan, samples_to_save), get_logger('radial', cfg.log_level))
self._radial_tensor_endpoint = radial_tensor_endpoint