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
What distinguishes laser light from lamp light in terms of wavelengths?
Anonymous Quiz
11%
Laser light has many wavelengths
34%
Lamp light is monochromatic
55%
Laser light has a single wavelength
Which characteristic is NOT associated with lamp light?
Anonymous Quiz
11%
Many wavelengths
12%
Multidirectional
8%
Incoherent
69%
Monochromatic
what is a common feature of lamp light?
Anonymous Quiz
8%
Single wavelength
10%
Coherent
78%
Multidirectional
4%
Polarized
How is the coherence of lamp light described?
Anonymous Quiz
17%
Coherent
69%
Incoherent
8%
Monochromatic
6%
Collimated
What is the purpose of collimating laser light?*
Anonymous Quiz
7%
To make it multidirectional
19%
To randomize its direction
74%
To concentrate it into a defined spot
What happens to an electron when it absorbs an amount of energy?
Anonymous Quiz
8%
It stays in its lowest energy level (ground state)
86%
It moves to a higher orbital level (excited state)
5%
It releases a photon
2%
It stops moving