Podcast
Questions and Answers
Which echogenicity is characterized by displaying black on an ultrasound image?
Which echogenicity is characterized by displaying black on an ultrasound image?
What is the primary use of a linear transducer?
What is the primary use of a linear transducer?
In which ultrasound mode does motion of structures get visualized over time?
In which ultrasound mode does motion of structures get visualized over time?
What artifact is typically seen when ultrasound waves are absorbed by a solid structure?
What artifact is typically seen when ultrasound waves are absorbed by a solid structure?
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Which Doppler technique shows continuous venous flow in a band-like shape?
Which Doppler technique shows continuous venous flow in a band-like shape?
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What is the effect of increasing gain on an ultrasound image?
What is the effect of increasing gain on an ultrasound image?
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What is the reason behind needing a full bladder during a pelvic ultrasound?
What is the reason behind needing a full bladder during a pelvic ultrasound?
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Which artifact occurs due to sound waves bouncing between two layers of lung pleura?
Which artifact occurs due to sound waves bouncing between two layers of lung pleura?
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Study Notes
Ultrasound Techniques
- Transverse plane: probe to the right side of the head
- Longitudinal plane: probe to the head
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Echogenicity:
- Hyperechoic: white (bone, ligaments, dura, nerves)
- Isoechoic: gray (muscles, muscle striation)
- Anechoic: black (fluid, CSF, blood)
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Transducer Points:
- Linear: lower depth, high resolution (superficial structures, vessels, nerves, eyes)
- Curvilinear: higher depth, lower resolution (abdominal, renal, obstetrics)
- Phased array: higher depth, lower resolution (cardiac, lungs)
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Ultrasound Modes:
- 2D/B-mode: most common, brightness mode, different gray shades for 2D imaging
- M-mode: motion mode, captures ultrasound images in a single line over time, shows movement of structures
- Color Doppler: shows blood flow or tissue movement; red indicates flow towards transducer, blue away
- Pulsed Doppler: depicts venous flow (continuous band-like shape) and arterial flow (triangular shape); measures blood flow
- Power Doppler: detects very low flow states; useful for assessing blood flow
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Ultrasound Functions:
- Gain: controls overall echo strength (brightness)
- Depth: adjusts the depth of the image
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Improving Image Acquisition:
- Probe pressure: crucial for proper image capture
- Fanning/rocking/sliding: crucial for proper image capture
- Respiratory assistance: important for keeping the patient still
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Ultrasound Artifacts:
- Shadowing: caused by absorption of ultrasound waves by solid structures (e.g., gallstones, kidney stones, bone)
- Edge shadowing:
- Posterior enhancement: substance behind an echo-free substance appears brighter (fluid, example)
- Reverberation: ultrasound waves bounce between two tissues, visualized as a-lines (lungs)
- Comet tail: produced by strong reflectors (e.g., air bubbles)
- Ring down: produced by fluid collection surrounded by air bubbles; needs 3 "B-lines" in one view to be pathological
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Description
This quiz covers essential ultrasound techniques including the transverse and longitudinal planes, echogenicity levels, and various transducer points. It also explores different ultrasound modes such as 2D/B-mode, M-mode, and Doppler imaging. Test your knowledge on these critical imaging methods used in medical diagnostics.
