CT scanner and piston pump: what they have in common

1. Step 1. CT scanner — evolved from — X-ray machine. Tomography from many images.
2. Step 2. X-ray machine — is used in — Angioplasty. Under X-ray guidance.
3. Step 3. Angioplasty — has part — Catheter. A balloon catheter.
4. Step 4. Catheter — is part of — IV drip. A catheter.
5. Step 5. IV drip — has part — Syringe. A needle.
6. Step 6. Syringe — works like — Piston pump. A syringe is a hand-operated piston pump.

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