What material property of the crystal is utilized in the generation of ultrasound?
Anonymous Quiz
5%
Ferromagnetic
8%
Paramagnetic
85%
Piezoelectric
2%
Diamagnetic
How does the ultrasound transducer generate ultrasound waves?
Anonymous Quiz
3%
By cooling the crystal
91%
By applying a high-frequency alternating electrical current to the crystal
4%
By heating the crystal
1%
By rotating the crystal
What does the alternating compression-rarefaction by the ultrasound crystal produce?
Anonymous Quiz
8%
UV
74%
US
17%
A magnetic wave
What are the two modes of ultrasound application mentioned in the image?
Anonymous Quiz
88%
Continuous and pulsed
11%
Continuous and intermittent
1%
Intermittent and thermal
What is the primary use of pulsed ultrasound according to the image?
Anonymous Quiz
78%
Producing non-thermal effects
15%
Producing thermal effects
7%
Producing sound effects
What non-thermal effects can ultrasound have on tissues?
Anonymous Quiz
5%
Increasing tissue temperature
91%
Acoustic streaming, microstreaming, and cavitation
4%
Causing tissue dehydration
How does the depth of penetration differ between 1 MHz and 3 MHz ultrasound waves?
Anonymous Quiz
79%
1 MHz penetrates deeper than 3 MHz
19%
3 MHz penetrates deeper than 1 MHz
2%
Both penetrate the same depth
What potential hazard can occur due to deterioration of the cable connection to a movable angle transducer head?
Anonymous Quiz
27%
Burn injury
5%
Muscle spasm
66%
Electrical shock
2%
Hearing loss
What is a key method to avoid standing waves during ultrasound therapy?
Anonymous Quiz
9%
Reduce the intensity
5%
Decrease the treatment time
78%
Continuous movement of the treatment head
7%
Increase the frequency
Which of the following is NOT a contraindication for using ultrasound therapy?
Anonymous Quiz
6%
Pregnancy
17%
Joint cement
9%
Malignant tumors
69%
Muscle strain
What is the primary reason for avoiding ultrasound therapy on reproductive organs?
Anonymous Quiz
9%
It promotes tissue healing
77%
It may cause tissue damage and affect reproductive functions
6%
It causes muscle contraction
7%
It reduces blood flow
❤1
What are the thermal effects of ultrasound listed in the image?
Anonymous Quiz
2%
Only acceleration of metabolic rate
88%
All of the above
8%
Increased blood flow and soft tissue extensibility
2%
Reduction of or control of pain and muscle spasm
Which of the following factors influences the amount of temperature increase in tissue produced by ultrasound absorption?
Anonymous Quiz
2%
Frequency
2%
Tissue type
6%
Intensity and duration
90%
All of the above
Why is ultrasound not ideal for heating muscle tissue?
Anonymous Quiz
25%
Muscles have low collagen content
55%
Muscles have a low absorption coefficient
8%
Muscles are unaffected by ultrasound
11%
Muscles are too superficial
Which type of cavitation is considered more dangerous during ultrasound therapy?
Anonymous Quiz
14%
Stable cavitation
70%
Unstable cavitation
16%
Micro-streaming
👍3
What type of light does a laser emit?
Anonymous Quiz
5%
Multicolored
88%
Monochromatic
6%
Multidirectional
What is a key characteristic of laser light's travel direction?
Anonymous Quiz
19%
Multidirectional
79%
Coherent
2%
Random
❤1
How is laser light described in terms of beam concentration?
Anonymous Quiz
14%
Scattered
10%
Diffuse
76%
Collimated
Which term best describes the directionality of laser light?
Anonymous Quiz
15%
Multidirectional
5%
Bidirectional
79%
Unidirectional