Source 1primary paper2025MED
Toolkit/passive cavitation detection
passive cavitation detection
Taxonomy: Technique Branch / Method. Workflows sit above the mechanism and technique branches rather than replacing them.
Summary
Additionally, acoustic emissions, recorded via passive cavitation detection, increased with both pressure and pulse number but decreased in droplets with higher bulk boiling points.
Usefulness & Problems
Why this is useful
Passive cavitation detection records acoustic emissions produced during droplet vaporization experiments. In this study it was used to relate emissions to pressure, pulse number, and droplet boiling point.; recording acoustic emissions during ADV
Source:
Passive cavitation detection records acoustic emissions produced during droplet vaporization experiments. In this study it was used to relate emissions to pressure, pulse number, and droplet boiling point.
Source:
recording acoustic emissions during ADV
Problem solved
It provides an acoustic readout of droplet activity that complements optical imaging.; measuring acoustic output associated with droplet vaporization
Source:
It provides an acoustic readout of droplet activity that complements optical imaging.
Source:
measuring acoustic output associated with droplet vaporization
Problem links
measuring acoustic output associated with droplet vaporization
LiteratureIt provides an acoustic readout of droplet activity that complements optical imaging.
Source:
It provides an acoustic readout of droplet activity that complements optical imaging.
Published Workflows
Objective: Characterize how ultrasound driving conditions and droplet thermophysical properties shape acoustic droplet vaporization dynamics, payload release, and acoustic emissions in hydrogel-based drug-delivery systems.
Why it works: The workflow combines complementary optical and acoustic measurements to resolve fast ADV events, real-time payload release, and acoustic output, allowing the authors to connect bubble dynamics with release behavior and droplet properties.
acoustic droplet vaporizationcoupling between bubble dynamics and payload releasepost-ultrasound diffusion-driven releaseultra-high-speed brightfield microscopyultra-high-speed fluorescence microscopyconfocal microscopypassive cavitation detection
Stages
- 1.Multimodal real-time optical imaging of ADV and payload release(functional_characterization)
This stage exists to directly observe ADV and payload release behavior in real time.
Selection: Capture ADV and real-time payload release in fibrin-based hydrogels using complementary imaging modes with different temporal resolutions.
- 2.Acoustic emission recording during ADV(secondary_characterization)
This stage exists to complement optical observations with an acoustic readout of droplet activity.
Selection: Record acoustic emissions via passive cavitation detection and relate them to pressure, pulse number, and droplet boiling point.
Steps
- 1.Capture ADV with ultra-high-speed brightfield microscopyassay method
Resolve rapid bubble dynamics during acoustic droplet vaporization.
Fast brightfield imaging is needed during ultrasound exposure to observe the earliest and fastest ADV events.
- 2.Capture real-time payload release with ultra-high-speed fluorescence microscopyassay method
Visualize payload release during ADV in real time.
A high-speed fluorescence readout is used to connect rapid release behavior to the concurrently studied ADV dynamics.
- 3.Monitor release behavior with confocal microscopyassay method
Provide complementary imaging of payload release in fibrin-based hydrogels.
Confocal microscopy offers a slower complementary view after or alongside ultra-high-speed imaging of the fastest events.
- 4.Record acoustic emissions with passive cavitation detectionassay method
Measure acoustic output associated with droplet vaporization and compare it across ultrasound and droplet-property conditions.
An acoustic readout complements optical observations by quantifying emission changes with pressure, pulse number, and boiling point.
Taxonomy & Function
Primary hierarchy
Technique Branch
Method: A concrete measurement method used to characterize an engineered system.
Mechanisms
acoustic emission detectionTechniques
Functional AssayTarget processes
recombinationImplementation Constraints
cofactor dependency: cofactor requirement unknownencoding mode: genetically encodedimplementation constraint: context specific validationimplementation constraint: payload burdenoperating role: sensor
It requires an ultrasound exposure setup and instrumentation for passive acoustic recording during ADV.; requires an ADV experiment with acoustic emission recording
The abstract does not indicate that passive cavitation detection alone resolves real-time payload release or bubble morphology.; the abstract does not indicate that it directly measures payload release
Validation
Cell-freeBacteriaMammalianMouseHumanTherapeuticIndep. Replication
Supporting Sources
Ranked Claims
Phase-shift droplets undergoing acoustic droplet vaporization offer a promising approach for ultrasound-mediated drug delivery with spatiotemporally controlled payload release.
Phase-shift droplets undergoing acoustic droplet vaporization (ADV) offer a promising approach for ultrasound-mediated drug delivery, enabling the spatiotemporally controlled release of therapeutic payloads.
Post-ultrasound payload release rates exceeded bubble growth rates.
Notably, payload release rates post-ultrasound exceeded bubble growth rates.
Ultra-high-speed brightfield, fluorescence, and confocal microscopy were used to capture ADV and real-time payload release in fibrin-based hydrogels.
We employed ultra-high-speed brightfield [10 million frames per second (Mfps)], fluorescence (2 Mfps), and confocal microscopy (1 fps) to capture ADV and real-time payload release in fibrin-based hydrogels.
brightfield frame rate 10 Mfpsconfocal frame rate 1 fpsfluorescence frame rate 2 Mfps
Acoustic emissions recorded by passive cavitation detection increased with pressure and pulse number and decreased in droplets with higher bulk boiling points.
Additionally, acoustic emissions, recorded via passive cavitation detection, increased with both pressure and pulse number but decreased in droplets with higher bulk boiling points.
Cycle number and pressure affected early bubble expansion and acoustic output, whereas long-term bubble behavior and release kinetics were governed by droplet thermophysical properties.
While the cycle number and pressure affected early bubble expansion and acoustic output, long-term bubble behavior and release kinetics were governed by the droplet's thermophysical properties.
Ultra-high-speed imaging revealed direct coupling between bubble dynamics and payload release during ultrasound exposure, with release continuing by diffusion after ultrasound.
Ultra-high-speed imaging revealed a direct coupling between bubble dynamics and payload release during ultrasound exposure, with release continuing via diffusion after ultrasound.
Payload release velocities reached 2-4 m/s during ADV and slowed to 0.6-2.7 μm/s after ultrasound.
During ADV, payload release velocities reached 2-4 m/s, slowing to 0.6-2.7 μm/s post ultrasound.
payload release velocity during ADV 2-4 m/spayload release velocity post ultrasound 0.6-2.7 μm/s
Approval Evidence
1 source1 linked approval claimfirst-pass slug passive-cavitation-detection
Additionally, acoustic emissions, recorded via passive cavitation detection, increased with both pressure and pulse number but decreased in droplets with higher bulk boiling points.
Source:
measurement resultsupports
Acoustic emissions recorded by passive cavitation detection increased with pressure and pulse number and decreased in droplets with higher bulk boiling points.
Additionally, acoustic emissions, recorded via passive cavitation detection, increased with both pressure and pulse number but decreased in droplets with higher bulk boiling points.
Source:
Comparisons
Source-stated alternatives
The paper pairs it with ultra-high-speed brightfield, fluorescence, and confocal microscopy as complementary measurement methods.
Source:
The paper pairs it with ultra-high-speed brightfield, fluorescence, and confocal microscopy as complementary measurement methods.
Source-backed strengths
captures pressure- and pulse-number-dependent acoustic emissions
Source:
captures pressure- and pulse-number-dependent acoustic emissions
Compared with confocal microscopy
The paper pairs it with ultra-high-speed brightfield, fluorescence, and confocal microscopy as complementary measurement methods.
Shared frame: source-stated alternative in extracted literature
Strengths here: captures pressure- and pulse-number-dependent acoustic emissions.
Relative tradeoffs: the abstract does not indicate that it directly measures payload release.
Source:
The paper pairs it with ultra-high-speed brightfield, fluorescence, and confocal microscopy as complementary measurement methods.
Compared with microscopy
The paper pairs it with ultra-high-speed brightfield, fluorescence, and confocal microscopy as complementary measurement methods.
Shared frame: source-stated alternative in extracted literature
Strengths here: captures pressure- and pulse-number-dependent acoustic emissions.
Relative tradeoffs: the abstract does not indicate that it directly measures payload release.
Source:
The paper pairs it with ultra-high-speed brightfield, fluorescence, and confocal microscopy as complementary measurement methods.
Ranked Citations
- 1.