Abstract: A biopsy needle sterilant device includes a sterilant pouch holding a sterilant and a sterilant actuation mechanism in fluid communication with the sterilant pouch. Actuation of the sterilant actuation mechanism delivers the sterilant from the sterilant pouch toward a target tissue. Actuation may be performed manually without requiring an external power source. The sterilant device may be coupled to a biopsy needle guide or an ultrasound probe.

Abstract: A method of correcting for magnetic field inhomogeneity caused by various factors, such as implanted metal and air/tissue interfaces, in magnetic resonance imaging (MRI) is provided. Geometric distortion due to inhomogeneity in a static magnetic field B.sub.0 is corrected for by addition of a compensation gradient. The compensation gradient is applied in the slice selection direction Z, has a timing substantially identical to the standard frequency encoding gradient G.sub.x, and has an amplitude identical to the slice selection gradient G.sub.z that is applied during the initial RF excitation. Inhomogeneity in an RF field B.sub.1 is compensated for by utilizing an RF coil that is large enough in size as compared with a metal implant to make the volumetric percentage of the metal in the coil insignificant. Inhomogeneity in a gradient field G=(G.sub.x, G.sub.y, G.sub.z) is corrected for by a treatment of the most significant error factor G.sub.z that causes slice thickness error.