Which crystal material is used in the ultrasound transducer?

Which crystal material is used in the ultrasound transducer?

• A. Piezo-electric crystal
• B. Quartz
• C. Less zirconate
• D. Barium titinate

Answer: (A)

The ultrasound transducer relies on the piezoelectric crystal. The piezoelectric effect is what lets the crystal convert an electrical signal into mechanical vibrations to produce ultrasound, and then convert the returning echoes back into electrical signals. For diagnostic probes, materials with strong electromechanical coupling are preferred, typically piezoelectric ceramics like lead zirconate titanate, which provide efficient, broad-bandwidth performance. Among the options, naming the crystal as a piezo-electric crystal highlights the essential material property that makes the transducer work. Quartz is also piezoelectric but has weaker coupling and is not favored for modern imaging probes; the other listed materials are not standard in this context.

The ultrasound transducer relies on the piezoelectric crystal. The piezoelectric effect is what lets the crystal convert an electrical signal into mechanical vibrations to produce ultrasound, and then convert the returning echoes back into electrical signals. For diagnostic probes, materials with strong electromechanical coupling are preferred, typically piezoelectric ceramics like lead zirconate titanate, which provide efficient, broad-bandwidth performance. Among the options, naming the crystal as a piezo-electric crystal highlights the essential material property that makes the transducer work. Quartz is also piezoelectric but has weaker coupling and is not favored for modern imaging probes; the other listed materials are not standard in this context.