| 摘要 |
PURPOSE: To obtain an appliance which does not generate an artifact which deteriorates a magnetic resonance(MR) image by forming a suction biopsy needle of an alloy contg. >=35wt.%, nickel, thereby providing this needle with MR adaptability. CONSTITUTION: The biopsy needle 10 is made of the C-276 alloy. The C-276 alloy is a high heat resistance and high strength alloy and its desirable compsn. is about 49wt.% nickel, 15.00 to 17.00wt.% molybdenum, 14.50 to 16.50wt.% chromium, 4.00 to 7.00wt.% iron, 3.00 to 4.50wt.% tungsten, <=0.08wt.% carbon, <=1.00wt.% magnesium, <=1.00wt.% silicon and <=2.50wt.% cobalt. This alloy contains the nickel at the high ratio as described above and, therefore, the MR adaptability of the needle 10 is conceivably obtainable. The needle 10 made of the C-276 alloy generates the artifact necessary for alignment of the needle on the MR image. |
