ultrasound
Enable an agent to recognise ultrasound, describe its acoustic behaviour and intended use, and identify the evidence needed before measurement, interpretation or exposure decisions.
Research draft, second pass
A second pass drafted this model: the structure a model of this thing needs, and what is known about it in the world. The line under this one says how the second half was obtained - researched against sources, or recalled without web access, in which case nothing here was read anywhere and every claim is a lead to verify. Unreviewed either way.
recalled by Codex without web access - no source was read
Researched by: Codex
Purpose and description
Enable an agent to recognise ultrasound, describe its acoustic behaviour and intended use, and identify the evidence needed before measurement, interpretation or exposure decisions.
Ultrasound is acoustic vibration at frequencies above the conventional upper limit of human hearing, approximately 20 kHz; the term also commonly denotes imaging performed using such waves.
It can be Classify a measured acoustic spectrum against an explicitly stated ultrasonic boundary.; Estimate wavelength or travel distance when the relevant sound speed and propagation path are supported.; Compare acoustic outputs after reconciling frequency, location and averaging conventions.; Identify coupling failures, propagation assumptions and acquisition artifacts that weaken an interpretation.; Relate measured echoes or transmitted signals to an application's observation goal.; Flag missing exposure evidence or unresolved operating constraints before recommending a change in output..
Distinguishing features
The phenomenon is a mechanical acoustic disturbance in a material medium; electromagnetic radiation is not ultrasound.
Its relevant frequency content lies above the conventional human audible range, commonly bounded at approximately 20 kHz; an individual listener's inability to hear a sound is insufficient to classify it.
Ultrasound can be present without producing an image, including in ranging, cleaning and material processing.
An ultrasound image is a derived representation of acoustic measurements, while the ultrasonic field is the underlying phenomenon.
A device's marketing label does not establish ultrasonic operation; operating frequency and evidence of acoustic output are needed.
Scope
+ Frequency-based identification of an acoustic field as ultrasonic
+ Propagation, reflection, scattering and absorption in specified media
+ Generation, coupling and reception of ultrasonic energy
+ Acoustic measurements and their acquisition conditions
+ Relationships between ultrasonic signals, intended applications and exposure constraints
- Complete ultrasound scanner, transducer or industrial equipment models
- Clinical diagnoses and patient-specific treatment decisions
- Complete imaging examinations and therapeutic procedure workflows
- Anatomical structures, inspected components and other target entities
- Infrasound, audible sound and non-acoustic imaging modalities
Characteristics
- Frequency content
- Hz, kHz or MHz; centre frequency, bandwidth or measured spectrum Establishes ultrasonic classification and supports interpretation of wavelength, attenuation and resolution.
- Propagation medium and wave mode
- Specified gas, liquid, solid or layered medium; longitudinal, shear, surface or guided mode where applicable Determines which propagation assumptions and sound-speed values are appropriate.
- Sound speed
- m/s, with medium, temperature, wave mode and measured or assumed status Connects frequency to wavelength and travel time to distance.
- Acoustic pressure
- Pa or MPa; identify peak positive, peak negative or root-mean-square convention Describes field amplitude without conflating different pressure summaries.
- Acoustic intensity
- W/m² or W/cm², with spatial and temporal averaging conventions Supports comparison of acoustic energy delivery only when measurement conventions are compatible.
- Temporal operation
- Continuous or pulsed; pulse duration in s, repetition frequency in Hz and duty cycle in % Distinguishes instantaneous output from accumulated exposure and sampling behaviour.
- Field geometry
- Beam width, focal depth and measurement location in mm or m, with defining criterion Identifies where energy is concentrated and where a reported measurement applies.
- Coupling condition
- Established, degraded, absent or unverified; describe interface and coupling method Helps distinguish target properties from transmission failures at interfaces.
- Application and target
- Links to an imaging, sensing, inspection, cleaning or therapeutic activity and its target Determines which observations, performance criteria and operating constraints are relevant.
- Measurement confidence
- Supported, qualified or unresolved, with calibration evidence, uncertainty and known limitations Prevents precise-looking measurements from being treated as reliable without supporting conditions.
Also called
Where this came from
wikidata · CC0 1.0
Also registered as vr.tr.ultrasound
Drafted structure
Bundle to layer to finding to question, as the second pass will find it: 6 bundles · 11 layers · 18 findings · 30 questions.
Ultrasonic identity Establish the acoustic meaning of ultrasound and distinguish it from application shorthand.
The name can denote a frequency regime, an imaging modality or an examination; an agent must establish which meaning a record uses.
Frequency boundary
Record the convention and spectral evidence used to identify ultrasound.
Ultrasonic frequency classification
Require a stated frequency boundary and distinguish fully ultrasonic signals from signals with only some ultrasonic content.
- What frequency boundary defines ultrasound in this record, and which reference or application convention supports it? definition
- What measured or specified frequency content lies above that boundary? measurement
Sense and registry boundary
Separate the acoustic phenomenon from devices, representations and procedures.
Intended ultrasound sense
Make explicit whether a source uses ultrasound for sound itself or as shorthand for an application.
- Does the registry's ACT placement refer to an ultrasound activity, or is this entry intended to cover the acoustic concept? boundary
- Which linked model owns any scanner, examination, image or treatment mentioned in the record? boundary
Propagation and interaction Describe how ultrasound travels through the relevant materials and interfaces.
Travel times, received amplitudes and observable targets depend on the medium and propagation path.
Medium and wave mode
Establish material conditions and wave modes before deriving acoustic quantities.
Supported propagation assumptions
Record the medium, mode and sound-speed evidence that support wavelength or distance estimates.
- Which media and wave modes occupy the propagation path, and what conditions could change their sound speeds? measurement
- Is each sound-speed value measured, taken from a reference or assumed by the instrument? provenance
Interfaces and signal loss
Account for reflection, transmission, scattering and attenuation along the path.
Path-dependent observability
Require evidence before attributing a weak or absent signal to the absence of a target.
- Which interfaces, incidence angles and material losses could explain the observed echo or transmitted amplitude? measurement
- What additional acquisition could distinguish target absence from poor coupling, attenuation or an unfavourable beam direction? action
Generation and acoustic field Connect source configuration and coupling to the ultrasonic field produced.
Electrical settings and nominal frequency alone do not specify the acoustic field reaching a target.
Source and coupling
Identify how ultrasound is generated and transmitted into the working medium.
Verified acoustic delivery
Separate source settings from evidence of acoustic transmission across the source-medium interface.
- What source or transducer generates the ultrasound, and how is it coupled to the propagation medium? provenance
- What observation verifies acoustic delivery and identifies air gaps, poor contact or coupling changes? measurement
Spatial and temporal output
Describe beam geometry, pulse structure and acoustic amplitude at specified locations.
Located and qualified field measures
Attach location, timing and averaging conventions to reported field measurements.
- Where are pressure, intensity and beam dimensions evaluated relative to the source, focus and target? measurement
- Which pulse parameters and spatial or temporal averaging conventions qualify the reported output? measurement
Measurement and interpretation Track how received ultrasound becomes a distance, image, flow estimate or material observation.
Ultrasonic measurements depend on acquisition geometry, instrument response and inference assumptions.
Signal acquisition
Record the receiving arrangement and evidence that the signal is adequately measured.
Traceable ultrasonic observation
Connect an observation to its pulse-echo, through-transmission or other acquisition arrangement and calibration.
- What acquisition arrangement, receiver bandwidth and sampling settings produced this observation? provenance
- What calibration and uncertainty evidence supports the measured timing, amplitude or frequency shift? measurement
Inference and artifacts
Expose assumptions that connect acoustic signals to claims about a target.
Application-specific inference
Distinguish directly measured signals from derived quantities and assess plausible artifacts.
- Which assumptions about sound speed, path length, round-trip travel or Doppler angle support the derived result? measurement
- Could reverberation, refraction, shadowing, aliasing or limited resolution explain the observation? boundary
- What repeat measurement or independent evidence would resolve the leading alternative explanation? action
Application and exposure Relate ultrasonic operation to its intended effect and the constraints governing exposure.
Imaging, inspection, cleaning and therapeutic uses require different performance evidence and operating limits.
Intended acoustic effect
Establish whether ultrasound is used to observe a target or deliberately change it.
Purpose-linked success criteria
Connect the intended use to a measurable outcome without transferring success criteria between applications.
- Is ultrasound intended to obtain information, transfer energy or produce a specified material or biological effect? definition
- What application-specific evidence establishes adequate detection, resolution, cleaning or other intended performance? measurement
Exposure evidence and constraints
Record exposure conditions, relevant effects and the authority for operating constraints.
Supported operating decision
Require context-specific evidence before judging an exposure or changing ultrasonic output.
- What target, duration, frequency and acoustic output define the exposure, and what evidence addresses heating or mechanical effects? measurement
- Which applicable operating limits, manufacturer instructions or professional guidance have been checked for this use? provenance
- What missing evidence or observed condition requires pausing operation or referring the decision to the responsible specialist? action
Evidence and external alignment What the world already says about this thing, gathered so the model can be checked against it.
A model that cannot be lined up against existing standards, identifiers and practice cannot be adopted by anyone who already uses them.
Reported evidence
Findings from the breadth pass, kept separate from the structural claims.
Check these first
Recalled without web access and unsourced; every item is a lead to verify.
- No sense is recorded. This description covers the acoustic phenomenon and its applications; ACT.ACT may instead intend the activity of performing an ultrasound examination.
- Frequency ranges are representative application ranges, not universal limits or recommended exposure settings.
- Standards are named from recall; their current editions and applicability require verification.
- Which of these check these first hold for the sense of ultrasound this model covers, and on what evidence? provenance
Kinds and varieties
Recalled without web access and unsourced; every item is a lead to verify.
- Diagnostic ultrasound imaging
- Doppler ultrasound
- Therapeutic ultrasound
- Ultrasonic nondestructive testing
- Ultrasonic cleaning
- Ultrasonic ranging
- Which of these kinds and varieties hold for the sense of ultrasound this model covers, and on what evidence? provenance
Identifiers and schemes
Recalled without web access and unsourced; every item is a lead to verify.
- DICOM modality defined terms - US - Identifies ultrasound imaging as a modality, not ultrasound as a physical phenomenon.
- Which of these identifiers and schemes hold for the sense of ultrasound this model covers, and on what evidence? provenance
Standards and regulation
Recalled without web access and unsourced; every item is a lead to verify.
- IEC 60601-2-37, issued by the International Electrotechnical Commission, addresses basic safety and essential performance of ultrasonic medical diagnostic and monitoring equipment.
- IEC 61157, issued by the International Electrotechnical Commission, addresses reporting the acoustic output of medical diagnostic ultrasonic equipment.
- Which of these standards and regulation hold for the sense of ultrasound this model covers, and on what evidence? provenance
Real-world use
Recalled without web access and unsourced; every item is a lead to verify.
- Medical imaging of internal anatomy and movement.
- Measurement of blood flow using Doppler frequency shifts.
- Therapeutic heating or focused tissue ablation.
- Detection of internal defects and measurement of material thickness.
- Cleaning components through ultrasound-induced cavitation in liquids.
- Which of these real-world use hold for the sense of ultrasound this model covers, and on what evidence? provenance
Typical measurements
Recalled without web access and unsourced; every item is a lead to verify.
- Acoustic frequency defining ultrasound - Above approximately 20,000; the boundary is conventional rather than an individual hearing threshold - Hz
- Frequency in conventional diagnostic medical imaging - Approximately 1-20; specialized applications extend beyond this range - MHz
- Frequency in ultrasonic cleaning - Commonly approximately 20-80; equipment varies - kHz
- Which of these typical measurements hold for the sense of ultrasound this model covers, and on what evidence? provenance
Failure modes and hazards
Recalled without web access and unsourced; every item is a lead to verify.
- Attenuation limits penetration, especially at higher frequencies.
- Strong reflection at gas interfaces and attenuation by bone can obscure structures in medical imaging.
- Reverberation, acoustic shadowing and other artifacts can cause misleading images or measurements.
- Poor acoustic coupling or unsuitable probe positioning can degrade signals.
- Sufficient acoustic exposure can cause heating and mechanical effects, including cavitation; risk depends on exposure conditions and the medium.
- Which of these failure modes and hazards hold for the sense of ultrasound this model covers, and on what evidence? provenance
Neighbouring kinds and how to tell them apart
Recalled without web access and unsourced; every item is a lead to verify.
- Diagnostic ultrasonography - An imaging procedure using ultrasound; ultrasound itself is the broader acoustic phenomenon.
- Ultrasound scanner - A device that generates, receives and processes ultrasound signals rather than the waves themselves.
- Audible sound - Falls within the conventional human hearing frequency band rather than above its upper boundary.
- Infrasound - Has frequencies below the conventional lower human hearing boundary, approximately 20 Hz.
- Electromagnetic radiation - Can propagate through vacuum; ultrasound is a mechanical disturbance requiring a material medium.
- Which of these neighbouring kinds and how to tell them apart hold for the sense of ultrasound this model covers, and on what evidence? provenance
What the second pass must settle
- Does the source registry intend ultrasound as an acoustic concept or specifically as an imaging activity, given its ACT / ACT.ACT placement?
- Does an existing Vercy world model already own this concept or an application sense that this entry should link to?
- Which reference definitions should govern the upper-audible boundary and classification of broadband signals that cross it?
- Which application families require dedicated neighbouring models rather than further detail within this shared ultrasound model?
- Which authoritative measurement conventions and exposure references should be attached for each supported application and jurisdiction?