The photoacoustic imaging systems based on diode laser and condenser microphone for white cement phantoms and polyvinyl chloride phantoms

Research is concerned with using a photoacoustic imaging system based on a diode laser and a condenser microphone to image white cement phantoms and polyvinyl chloride phantoms. The white cement phantom represents hard tissue, while the polyvinyl chloride phantom represents soft tissue. The white cement phantom was varied in density to represent the osteoporosis phenomenon. The optimal laser modulation frequency system is 19 kHz, and the optimal duty cycle is 60%. The white cement phantom and polyvinyl chloride phantom can be distinguished even though the contrast is not very good. The two phantoms' distribution of acoustic intensity levels is not much different. The acoustic intensity level of the white cement phantom is 16 to 21 a.u., while the phantom PVC-DOTP is 17 to 25 a.u. The average acoustic intensity level of the white cement phantom tends to be higher when the density is also high. The average acoustic intensity levels obtained were (18±1), (19±1), and (20±1) a.u.