ACOUSTIC PRESSURE WAVE GENERATION WITHIN AN MR IMAGING-SYSTEM - POTENTIAL MEDICAL APPLICATIONS

被引：18

作者：

JOLESZ, FA

JAKAB, PD

机构：

[1] Department of Radiology, Harvard Medical School and Brigham and Women's Hospital, Boston, Massachusetts, 02115

来源：

JMRI-JOURNAL OF MAGNETIC RESONANCE IMAGING | 1991年 / 1卷 / 05期

关键词：

GUIDANCE; LITHOTRIPSY; PHYSICS; MAGNETIC RESONANCE (MR); EXPERIMENTAL; TECHNOLOGY; MODEL; MATHEMATICAL; NEOPLASMS; THERAPY; UTILIZATION;

D O I：

10.1002/jmri.1880010516

中图分类号：

R8 [特种医学]; R445 [影像诊断学];

学科分类号：

1002 ; 100207 ; 1009 ;

摘要：

The static magnetic field of a magnetic resonance (MR) imaging system was used as a component of an electromagnetic transducer for generating acoustic pressure waves. To permit limited focusing, the transducer was constructed from a conductive thin plate shaped like a section of a sphere. The plate was placed within the static field of the MR unit (B0 = 1.5 T). and current pulses with a rise time of 73 nsec and amplitude of 1.0 kA were applied to it. Hydrophonic recording demonstrated a shock wave with a peak pressure of 4.8 MPa at the approximated focal point. MR guidance of lithotripsy would be particularly useful to limit undesirable soft-tissue damage. It is also suggested that the integration of an acoustic pressure wave generator with MR imaging and control provides a novel technology for the treatment of solid soft-tissue tumors.

引用

页码：609 / 613

页数：5

共 14 条

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