Objective In recent years,the ultrafast ultrasound imaging technique based on plane-wave transmitter/ receiver has become a hot topic in the field of medical ultrasound imaging,which is expected to replace the traditional “focusing & scanning” ultrasound imaging mode and be widely used in clinical. The traditional imaging mode cannot achieve a high frame rate with its essential limitation. However,a high frame rate can be achieved by the plane wave ultrasound transmission and coherent compounding method. In this study,a new hypothesis is proposed that,the transducer without focusing lens in the elevation direction (non-elevation-focused probe,NEFP) may help to improve the image quality in ultrafast ultrasound imaging method,compared to the traditional transducer with focusing lens in the elevation direction (elevation-focused probe,EFP). Methods The theory and method of the coherent plane-wave compounding technology was introduced at first. Then the improvement of its image quality was confirmed by the simulation based on the Field II program. At last,to verify the hypothesis above,NEFP and EFP probes were also simulated by the Field II and then were manufactured. The image quality was then compared between the two types of probes on the simulated and real phantom. Results The results showed that the coherent plane-wave compounding imaging method could greatly improve the image quality. And the contrast of the image gotten by the NEFP probe was greater than the traditional EFP probe. Conclusions For ultrafast ultrasound imaging method,the NEFP probe can get a better imaging result compared to the traditional EFP probe.