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WorksheetsPrinciples of Medical Imaging
Total questions: 10
Worksheet time: 5mins
Which of the following is the main advantage of a multi-element linear array scanner in ultrasound imaging?
Increased frame rate
Improved spatial resolution and faster scanning
Reduced power consumption
Enhanced color display
In a linear array scanner, how are the transducer elements typically activated?
All elements simultaneously
One element at a time
In groups sequentially along the array
Randomly selected elements
The phased array system primarily differs from the linear array scanner by:
Using mechanical movement for beam steering
Steering the beam electronically by varying the excitation phase
Producing continuous wave ultrasound
Having only one transducer element
The area array system in ultrasound imaging is mainly used for:
One-dimensional motion detection
Three-dimensional (3D) imaging
Measuring blood pressure
ECG recording
The duplex scanner combines:
A-mode and B-mode imaging
Imaging and Doppler flow measurement
Linear array and phased array systems
Transmission and reception amplifiers
The intravascular ultrasound (IVUS) technique is primarily used to:
Monitor fetal heart rate
Visualize coronary arteries from within the vessel
Detect brain tumors
Measure respiratory rate
Which of the following best describes the construction of a multi-element array transducer?
Single piezoelectric crystal
Several small piezoelectric elements arranged linearly or in an area
Magnetic coil and diaphragm system
Rotating mechanical crystal
In phased array imaging, the process of beam focusing is achieved by:
Delaying excitation signals to different elements
Increasing the frequency of ultrasound
Mechanically tilting the transducer
Using multiple receivers
The main advantage of intravascular imaging over external ultrasound is:
Higher penetration depth through tissues
Direct, high-resolution visualization of vessel wall and plaque
Non-invasive operation
Capability for 3D whole-body imaging
Which of the following ultrasound systems allows dynamic focusing and beam steering without mechanical motion?
Mechanical sector scanner
Linear array scanner
Phased array system
A-mode scanner
