Chapters
Keys: 1 to 7 chapters, 0 whole bench, space play or pause, R restart, V reset view. Drag the stage to orbit, scroll or pinch to zoom. With the guided sweep on, each chapter ramps its key setting; moving that slider takes over by hand.
Bench settings
Bubble
Ultrasound
Beam in tissue
Blood and generator
Live readout
Values come from the model at the current settings (water, 20-cycle pulse). Harmonic levels of coated bubbles are overstated by the kinked shell law (see Model).
Resonance curve
Radial excursion R_max/R₀ − 1 (log scale) against frequency at the current pₐ, for the selected bubble and a free air bubble of the same size. The lipid shell starts slack, so the coated bubble rings lower than the bare one.
Radius and echo in time
R(t)/R₀ and the echo pressure at 1 cm for the current settings.
Echo spectrum
Spectrum of the echo (dB below its peak); fundamental, harmonics and subharmonic marked. For coated bubbles the model overstates the harmonics (kinks in the shell law).
Dissolution in blood
R(t) of a 2.5 µm bubble at 37 °C, log time; lifetime when R falls below 0.1 µm.
Depth and frequency
Focal pressure over source pressure against depth; attenuation α₀ f z in dB.
Crowd: fraction collapsing
Fraction of a log-normal population with R_max/R₀ ≥ 2 against pₐ, Wilson 95 % interval.
Export
The export holds the parameter table with sources, the seeds, the core hash, the current settings, the chapter's event log, the dashboard curves and any batch you ran. Copy it and paste it into a file or a spreadsheet. Values are model output, not measurements.