Ultrasound transducer probe and particle accelerator: what they have in common

1. Step 1. Ultrasound transducer probe — is part of — Ultrasound scanner. An array of piezoelectric elements.
2. Step 2. Ultrasound scanner — has part — Digital signal processor. Forming the image.
3. Step 3. Digital signal processor — is part of — Doppler radar. It picks out the Doppler shift.
4. Step 4. Doppler radar — has part — Magnetron. Or a klystron — the transmitter.
5. Step 5. Magnetron — is part of — Medical linear accelerator. A microwave generator (magnetron or klystron).
6. Step 6. Medical linear accelerator — is a kind of — Particle accelerator. An accelerator.

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