Acquisition
Tissue model (εr, σ S/m)
100 %
Loading 3D library…
SIMULATION
x —, z — mm · —
Neurological convention: image left = phantom left
20 mm
SIMULATION
APLR
0 dB−5−10−15
Wheel: zoom; drag: pan; double-click: reset; right-drag: window width/level; M: measure; W: reset window; Esc: cancel scan
Right-drag adjusts window width/level
Data export (from sim):
python -m mwimg.export --example example_dataimport numpy as np
from mwimg.export import load_scan, reconstruct
scan = load_scan("example_data/scan.s4p")
x = np.linspace(-0.03, 0.03, 31)
xx, zz = np.meshgrid(x, x)
grid = np.column_stack([xx.ravel(), np.zeros(xx.size), zz.ravel()])
image = reconstruct(scan["S"], dict(tx=scan["tx"], rx=scan["rx"], freqs=scan["freqs"], grid=grid))pre-registration documents available on requestResult
Brightest spot (x, z)—
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Autofocus tissue εr—
Pre-registered analysis v2
Pre-registered study
Phantom instance study (simulation)
Autofocus (image sharpness vs εr)
Processing log
Data and methods
2-D full-wave FDTD: BrainWeb head and procedural breast slices. Non-dispersive tissue values near band centre. Hardware timings are design estimates. BrainWeb: McGill University, MNI; Cocosco et al., NeuroImage 1997; Kwan et al., IEEE TMI 1999.
Simulation based on the BrainWeb digital brain phantom.
https://brainweb.bic.mni.mcgill.ca/brainweb/- C.A. Cocosco, V. Kollokian, R.K.-S. Kwan, A.C. Evans, "BrainWeb: Online Interface to a 3D MRI Simulated Brain Database", NeuroImage 5(4), part 2/4, S425, 1997.
- R.K.-S. Kwan, A.C. Evans, G.B. Pike, "MRI simulation-based evaluation of image-processing and classification methods", IEEE Transactions on Medical Imaging 18(11):1085–97, 1999.
- R.K.-S. Kwan, A.C. Evans, G.B. Pike, "An Extensible MRI Simulator for Post-Processing Evaluation", Visualization in Biomedical Computing (VBC'96), LNCS 1131, Springer, 1996, pp. 135–140.
- D.L. Collins, A.P. Zijdenbos, V. Kollokian, J.G. Sled, N.J. Kabani, C.J. Holmes, A.C. Evans, "Design and Construction of a Realistic Digital Brain Phantom", IEEE Transactions on Medical Imaging 17(3):463–468, 1998.