Usually by the time hiring managers get to the reference phase they've already formed an opinion about how you'd perform at the job.
However, in order to mimic a real PET-MR scan, the attenuation map used in the PET reconstruction in a given motion phase other than the reference phase was not generated by the XCAT phantom for the MC study.
By converting the DOCT imaging system to the CGD sensing system, the reference phase modulator, reference path length scanning, signal digitization and demodulation processing can be omitted.
Cross-range reconstruction can then be obtained by matched filtering of the actual phase history function for the same subcarrier and the reference phase response.
Figure 5 shows the coronal attenuation map in the reference motion phase (end-diastole/end-exhalation) (Fig. 5a); the attenuation map transformed from the reference phase to the phase of end-inspiration/end-systole using the motion fields measured by MRI (Fig. 5b) and the true attenuation map generated by the XCAT phantom in the phase of end-inspiration/end-systole (Fig. 5c).
The phase shift was calculated as the difference between the reference phase and the response phase, with a negative value representing a delay phase shift.
This method consists of substituting the phase of the first part of an audio segment by a reference phase that represents the data.
The motion fields transforming the MR image volume from a given motion phase to the reference motion phase were obtained by applying a non-rigid image registration technique, which is based on the Demons algorithm [25 27].
The reconstructed PET image by FBP for each motion phase was transformed to the reference motion phase using the motion fields measured by MRI in each time frame.
IMPS spectra and images were next recorded using a laser diode source (λexc = 488 nm, Omicron Phoxx) modulated by the reference output of the phase-sensitive detector and the frequency was swept in the range of ∼1 Hz up to 20 kHz.
