Training activity information
Details
Investigate the effects of user selectable parameters for:
- Colour doppler imaging
- Power doppler imaging
- PW spectral doppler
- CW spectral doppler
Type
Developmental training activity (DTA)
Evidence requirements
Evidence the activity has been undertaken by the trainee​.
Reflection on the activity at one or more time points after the event including learning from the activity and/or areas of the trainees practice for development.
An action plan to implement learning and/or to address skills or knowledge gaps identified.
Considerations
- User selectable parameters –
- Colour doppler: size, position and angle of colour box, colour frequency, scale (pulse repetition frequency), baseline, colour gain, line density, depth of field
- User selectable parameters –
- Spectral doppler: Gate size and position, angle of insonation, doppler frequency, scale (pulse repetition frequency), doppler gain, wall filters, output power, baseline
- Safety indices and guidelines
- Application of spectral doppler
Reflective practice guidance
The guidance below is provided to support reflection at different time points, providing you with questions to aid you to reflect for this training activity. They are provided for guidance and should not be considered as a mandatory checklist. Trainees should not be expected to provide answers to each of the guidance questions listed.
Before action
- Consider specific insights you hope to gain regarding the practical impact of adjusting Doppler scanning parameters.
- Think about your current understanding of Doppler physics and its application in clinical imaging.
- Anticipate learning how to optimise Doppler settings for different clinical applications and flow characteristics.
- Consider how to document and present the findings of your experimental investigations.
- Discuss the specific Doppler modalities to be investigated and the available ultrasound system with your training officer.
- Review the principles of Doppler ultrasound (colour, power, PW, CW) and the role of key parameters (e.g., pulse repetition frequency/scale, wall filter, sample volume size/position, gain, angle correction, output power).
- Familiarise yourself with the ultrasound system’s Doppler controls and parameter adjustment options.
- Plan your experimental approach, including the parameters to vary and the methods for assessing the resulting Doppler displays and safety indices.
- Reflect on your current knowledge of Doppler ultrasound physics and practical scanning techniques.
In action
- Pay attention to your actions. How are you approaching the manipulation of Doppler parameters and observing their effects on the different Doppler modalities? Why are you doing it this way?
- What decisions are you making as you adjust parameters and evaluate the resulting Doppler signals and images? What aspects of understanding the practical application of Doppler principles feel intuitive, and what requires more conscious effort?
- How effective are your actions in demonstrating the relationship between user-selectable Doppler parameters and the resulting colour, power, PW, and CW displays?
- What challenges are you facing in optimising Doppler settings for different clinical scenarios or understanding the limitations of each modality?
- What can you learn about the practical operation of Doppler ultrasound as it unfolds? How does this activity connect to your understanding of Doppler physics and blood flow dynamics?
- Are there alternative approaches you could be considering for investigating the effects of the Doppler parameters?
- What support or guidance might you need in this moment to understand specific Doppler controls or interpret the spectral waveforms?
- Are you systematically varying the parameters and carefully documenting the observed changes in the Doppler displays?
On action
- How did changes in user-selectable parameters affect the colour Doppler flow display (e.g., colour gain, pulse repetition frequency)?
- What impact did parameter adjustments have on power Doppler sensitivity and artefact generation?
- How were the spectral Doppler waveforms (PW and CW) influenced by parameter changes (e.g., sample volume size, gate position, sweep speed)?
- What did you learn about the principles governing colour, power, and spectral Doppler imaging and the role of user parameters?
- How did this investigation enhance your understanding of optimising Doppler settings for different clinical scenarios?
- What potential pitfalls or artefacts are associated with incorrect Doppler parameter settings?
- How will this knowledge inform your use of Doppler imaging in future practice?
- What further learning in advanced Doppler techniques or specific vascular applications would be valuable?
- What support or resources might you need to further develop your Doppler ultrasound skills?
Beyond action
- Reflect on your investigation into the parameters affecting different Doppler ultrasound modalities. Can you recall how changes impacted the Doppler signals and image quality?
- In your clinical observations of ultrasound scans, have you noticed the sonographer adjusting these Doppler parameters? Could you relate those adjustments to your experimental findings?
- Consider if your understanding of Doppler physics has improved, and how this enhances your interpretation of your experimental results.
- Has this activity improved your understanding of how to optimise Doppler settings to visualise blood flow effectively for different clinical applications?
- Has your ability to recognise and potentially mitigate Doppler artefacts been enhanced by understanding the impact of parameter adjustments?
- How will a strong understanding of Doppler parameters be valuable in future roles involving vascular ultrasound or other applications where Doppler imaging is critical?
- What further learning or investigation into advanced Doppler techniques or the interpretation of complex Doppler waveforms would you like to pursue?
Relevant learning outcomes
| # | Outcome |
|---|---|
| # 1 |
Outcome
Assess the safety of the clinical application of non-ionising radiation. |
| # 4 |
Outcome
Acquire MR and ultrasound images and apply appropriate user-controllable parameters. |