Questions and Answers
How often should electrical safety checks be performed on an endocavitary transducer?
Which of the following modalities has the lowest output power?
Which of the following modalities has the greatest output power?
An object is located at a depth of 10 cm. The imaging depth is 7 cm. At what depth will a reflection from the object appear on the image?
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Which of these boundaries will create the weakest reflection?
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Which of the following boundaries will create the strongest reflection?
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Identify one of the advantages of coded excitation.
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What is the meaning of a thermal index = 3?
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The creation of an image by scanning from different angles best describes _____.
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You encounter a patient that does not speak English. Which of the following is best to obtain informed consent?
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You enter a hospital room to perform an ultrasound exam. Which of the following should you do first?
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Which of the following has the greatest output power?
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Where does coded excitation originate?
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All of the following are true of normal cavitation EXCEPT:
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Identify one of the advantages of coded excitation.
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Which of the following will eliminate range ambiguity artifact?
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Which of the following will eliminate range ambiguity artifact?
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Which of the following will eliminate range ambiguity artifact?
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Study Notes
Electrical Safety
- Electrical safety checks for endocavitary transducers should be performed before each exam.
Ultrasound Modalities Output Power
- Gray scale imaging has the lowest output power compared to pulsed Doppler, continuous wave (CW) Doppler, and elastography.
- Pulsed Doppler has the greatest output power compared to gray scale, CW Doppler, and elastography.
Imaging Depth Reflection
- An object at a depth of 10 cm will appear at a depth of 3 cm on an image when the imaging depth is limited to 7 cm.
Reflection Boundaries
- The weakest reflection occurs at the boundary between soft tissue and blood.
- The strongest reflection occurs at the boundary between air and soft tissue.
Coded Excitation Advantages
- Coded excitation improves penetration as an advantage.
Thermal Index
- A thermal index of 3 indicates that tissue temperature may rise by 3 degrees Celsius.
Imaging Techniques
- Spatial compounding refers to the creation of an image by scanning from different angles.
Informed Consent
- When a patient does not speak English, the best practice for obtaining informed consent is to call for a hospital interpreter.
Patient Identification
- The first action upon entering a hospital room for an ultrasound exam should be to politely check the patient's wristband for identification.
Coded Excitation Origin
- Coded excitation originates from the pulser in the ultrasound system.
Normal Cavitation
- Normal cavitation is also known as inertial cavitation and can create temperatures in the thousands of degrees; however, harmful bioeffects are not commonly observed.
Coded Excitation Advantages Reiterated
- Coded excitation also offers advantages like improved contrast resolution and improved temporal resolution.
Range Ambiguity Artifact Solutions
- Raising the pulse repetition frequency (PRF), imaging at shallower depths, or utilizing frequency compounding can eliminate range ambiguity artifacts.
- Lowering the frequency of the transducer can also assist in managing range ambiguity.
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Description
Test your knowledge on ultrasound physics with these flashcards focused on critical concepts. This quiz covers modalities, safety checks, and key terminologies essential for understanding endocavitary transducers. Perfect for exam preparation and enhancing your ultrasound expertise.
