| 摘要 |
A ultrasound transducer and needle assembly has a needle having a lumen and a distal end having a point at a first radial location, and a support rod interior to the lumen. The ultrasound transducer and its support rod are fixed in the lumen at a second radial location, the second radial location being between about 135 and about 225 radially from the first radial location. |
