| 摘要 |
<p>A shielded ultrasound transducer (50) which employs an electromagnetic waveguide (42) and also preferably active compensation (62) to shield an ultrasound probe/transducer element (50) from noise. The shielded ultrasound probe (50) includes an ultrasound transducer element (32) and an electromagnetic waveguide (42) coupled relative to the ultrasound transducer element (32) such that acoustic energy detected by the ultrasound transducer element (32) first traverses a region substantially bounded by the electromagnetic waveguide (42). In another embodiment, the shielded ultrasound probe (50) includes a conductive element (62) that can be current driven to generate an electromagnetic field that compensates electromagnetic fields in the vicinity of the ultrasound transducer (32). The conductive element (62) that provides active compensation may be located substantially in a region bounded by the electromagnetic waveguide element (42). The shielded ultrasound probe (50) is well suited for use with Hall Effect Imaging (HEI).</p> |
