| 摘要 |
A balloon catheter assembly (10) including a balloon section (14), a radiofluid port (40), and a magnetizing section. The magnetizing section generates a magnetic field that enhances the energy of the electrons (Beta particles) from radiofluid within the balloon section to increase the depth dose. The magnetizing section may comprise a solenoid arrangement (70) wherein wires (72,74) within catheter wall (20) having coils (76) surrounding the catheter within the balloon section (14) are connected to a controlled source (86,88) of milliamperage or microamperage, and generate a magnetic field within balloon section (14). Permanently magnetized distal end portions (116,138) of the catheter (112) or guide wire (118) or both, within balloon section (114), may be used to generate the magnetic field, or may be used in conjunction with a solenoid arrangement.
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