234UncleBob
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Many Thanks in advance to whoever replies!

For an Ultrasound Amplitude (A) scan, a short pulse of ultrasound is sent into the body simultaneously with an electron beam sweeping across the cathode ray oscilloscope (CRO) screen. The scanner receives the ultrasound pulses the appear as vertical deflections on the CRO screen.

What is meant by: "an electron beam sweeping across the cathode ray oscilloscope (CRO) screen"? - Why does this happen and for what purpose?

Thanks
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swinroy
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(Original post by 234UncleBob)
Many Thanks in advance to whoever replies!

For an Ultrasound Amplitude (A) scan, a short pulse of ultrasound is sent into the body simultaneously with an electron beam sweeping across the cathode ray oscilloscope (CRO) screen. The scanner receives the ultrasound pulses the appear as vertical deflections on the CRO screen.

What is meant by: "an electron beam sweeping across the cathode ray oscilloscope (CRO) screen"? - Why does this happen and for what purpose?

Thanks
Ultrasound is used to measure thicknesses of tissue inside the body.
the CRO acts as a timing device and since the speed of the ultrasound is known, you can calculate the thi
ckness
Part of the Ultrasound gets reflected at a change in tissue type. So one needs to measure time difference between first reflection and second reflection
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