into to echo chapter 4 TTE Flashcards
(105 cards)
The best 2D images are produced when the transducer is parallel to the structure being imaged.
False
The statement that best describes TTE.
noninvasive study
real-time ultrasound
relatively quick and reliable exam
According to the American Society of Echo (ASE), the current recommendation is to acquire M-mode dimensions rather than 2D dimensions.
False
The ideal Doppler angle is perpendicular to blood flow
False
CWD provides range resolution.
False
How can the sonographer improve temporal resolution?
decrease depth
decrease the number of focal zones
decrease sector width
What can the sonographer adjust to create a high contrast image on a technically difficult study?
dynamic range
A sonographer should never use unconventional windows or views.
False
PWD is subject to range ambiguity.
False
2D echo allows us to visualize the relationship between the heart structures in real time.
True
Aliasing occurs when the velocity is greater than 2 m/sec while using _______________ wave Doppler?
Pulsed
Color flow converts flow frequencies into different colors; its appearance based on the ______________?
Direction of blood flow
Velocity of blood flow
Color map
Continuous wave Doppler detects flow from a specific sample volume, in other words, it has range ambiguity?
False
Echo windows are determined by the patient’s physique and sometimes the Sonographer needs to practice flexibility and patience in order to find the proper window?
True
How can the Sonographer determine which valve’s waveform is displayed on the spectral graph during the PEDOF continuous wave Doppler?
Angle of the PEDOF probe in comparison to the heart
Sound of the recording
Appearance of the waveform
M-mode produces a two-dimensional image of the heart?
False
M-mode produces an “ice-pick” image of the heart and displays it in the form of a time/depth graph.
True
Pediatric transthoracic echo typically utilizes a ________ frequency transducer that provides excellent resolution, while adult transthoracic echo utilizes a _________ frequency transducer that provides better depth penetration?
High/low
The best 2D image is produced when the transducer is perpendicular to the structure being examined.
True
The Cardiac Sonographer can measure the structures within the heart by utilizing the M-mode or the 2D echocardiography images.
True
The indicators that travel down either side of the 2D image represent _____________ and each indicator is equal to __________centimeter?
Depth/one
The PEDOF continuous wave Doppler probe is a “blind” probe; therefore, the Cardiac Sonographer must rely on the _______________?
Position/angle of the probe and the spectral waveform in comparison to the EKG along with skill and practice
The __________ transmits and receives ultrasound pulses that collide with structures, such as the heart walls and valves?
Transducer
Ultrasound is a sound wave with a frequency greater than _______________?
20,000 Hertz