#1
Which type of waves are used in diagnostic medical sonography?
Ultrasound waves
ExplanationUltrasound waves are used to create images of the internal structures of the body by emitting high-frequency sound waves.
#2
Which anatomical structures are commonly assessed using abdominal ultrasound?
Liver, gallbladder, and kidneys
ExplanationAbdominal ultrasound is frequently used to assess the liver, gallbladder, and kidneys.
#3
In obstetric ultrasound, what does the term 'gestational sac' represent?
Fluid-filled sac surrounding the fetus
ExplanationThe gestational sac in obstetric ultrasound represents the fluid-filled structure surrounding the developing fetus.
#4
Which medical condition can be diagnosed using transvaginal ultrasound?
Ovarian cysts
ExplanationTransvaginal ultrasound is commonly used to diagnose conditions such as ovarian cysts.
#5
Which imaging technique is commonly used for assessing soft tissue injuries, such as muscle and ligament damage?
MRI
ExplanationMRI is commonly used for assessing soft tissue injuries, including muscle and ligament damage.
#6
What is the primary purpose of a Doppler ultrasound in medical imaging?
To assess blood flow
ExplanationDoppler ultrasound is used to evaluate the direction and velocity of blood flow within the body.
#7
Which imaging modality is often used to visualize fetal development during pregnancy?
Ultrasound
ExplanationUltrasound is commonly employed for visualizing and monitoring fetal development during pregnancy.
#8
What is the term for the gel applied to the skin during an ultrasound examination?
Conductive gel
ExplanationThe gel applied during an ultrasound examination is called conductive gel, facilitating the transmission of sound waves.
#9
Which Doppler shift is indicative of blood moving toward the transducer in ultrasound imaging?
Positive Doppler shift
ExplanationA positive Doppler shift in ultrasound indicates blood flow moving toward the transducer.
#10
Which of the following is a potential limitation of ultrasound imaging?
Limited penetration through bone
ExplanationOne limitation of ultrasound imaging is its restricted ability to penetrate through bone.
#11
What is the purpose of color Doppler ultrasound in vascular imaging?
To assess blood flow direction and velocity
ExplanationColor Doppler ultrasound in vascular imaging is used to evaluate the direction and velocity of blood flow.
#12
What is the frequency range of ultrasound waves typically used in medical sonography?
2 to 20 megahertz
ExplanationUltrasound waves in medical sonography typically range from 2 to 20 megahertz in frequency.
#13
In echocardiography, what does the term 'ejection fraction' refer to?
Percentage of blood pumped out of the heart with each contraction
ExplanationEjection fraction in echocardiography measures the percentage of blood expelled from the heart during each contraction.
#14
What is the purpose of a transducer in medical sonography?
To generate ultrasound waves
ExplanationThe transducer in medical sonography is used to produce and transmit ultrasound waves into the body for imaging.
#15
Which type of ultrasound imaging is commonly used for musculoskeletal examinations?
2D ultrasound
Explanation2D ultrasound is frequently employed for imaging musculoskeletal structures in medical examinations.
#16
Which ultrasound imaging technique is useful for evaluating soft tissues and blood vessels in real-time?
Duplex ultrasound
ExplanationDuplex ultrasound is valuable for real-time assessment of soft tissues and blood vessels.
#17
What is the primary advantage of 3D ultrasound over 2D ultrasound?
Volume visualization
ExplanationThe primary advantage of 3D ultrasound is its ability to provide volumetric visualization of structures.