| 摘要 |
A metal needle which is obtained by dipping a needle in a liquid selected from the group consisting of a solution of a metal in a strong acid, acetic acid and butyl acetate and then drying. It is preferable that the solution of a metal in a strong acid to be used in the dipping treatment is a nitric acid solution of a metal selected from the group consisting of a transition element, lanthanide and actinoid, for example, a nitric acid solution of a metal selected from the group consisting of palladium, gadolinium, germanium, beryllium, strontium, scandium and samarium. The metal needle as described above can be inserted into the body and ensures contrast imaging even in the case of using an ultrasonic photographic device that has been commonly employed. Thus, it is useful in inserting into a blood vessel, confirming the attainment to an organ and confirming the location of the needle in the case of breakage. |
