| Electronic ultrasound probe (Endosonics®) | Mechanical sector scanner probes (ALOKA®, Olympus®, Microvasive®) | Combined sector and linear probes (Fujinon®) | |
| Scanning method | Phased array | Mechanical/radial | Mechanical/radial or linear |
| Frequency (MHz) | 20 | 15-20/12-30/20 | 12-15-20 |
| Transducer elements | 64 | 1/1/1 | 1 |
| Working length (cm) | 175 | 192/205/200 | 200 |
| Diameter (mm) | 1.2/1.6 | 2/2.0-2.4-2.9/2.1 | 2.0/2.6 |
