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Medical Imaging History

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Questions and Answers

What is the primary outcome of the absorption of ultrasonic energy?

The energy is transformed into heat (correct)
The beam is redirected
The beam intensity is reduced
The frequency of the beam is changed

What is the determining factor of the absorption of an ultrasound beam?

The temperature of the medium and the wavelength of the beam
The frequency of the beam and the viscosity of the medium (correct)
The type of tissue and the intensity of the beam
The relaxation time of the medium and the type of transducer

What is the primary advantage of diagnostic ultrasound?

It poses zero risk and provides real-time imaging (correct)
It produces high-resolution images
It is a low-cost imaging modality
It is a non-invasive procedure

What is the typical material used in the active elements of ultrasound transducers?

Piezoelectric ceramic crystals (D) Signup and view all the answers

What is the function of the transducer in ultrasound imaging?

To emit and detect ultrasound waves (D) Signup and view all the answers

What is the primary application of ultrasound-guided needle biopsy?

To help physicians see the position of a needle (A) Signup and view all the answers

What is the characteristic of ultrasound waves that makes them useful for imaging soft tissues?

They have low frequency and high intensity (D) Signup and view all the answers

What is the result of the interaction between the ultrasound beam and the medium in reflection mode?

The beam is redirected by the medium (B) Signup and view all the answers

What is the primary difference between diagnostic ultrasound and x-rays?

Diagnostic ultrasound poses zero risk (A) Signup and view all the answers

What is the role of viscosity in the absorption of an ultrasound beam?

It affects the absorption of the beam (A) Signup and view all the answers