Accession Number : ADA332450

Title :   MR Measurement of Breast Tissue's Anisotropic Mechanical Properties

Descriptive Note : Annual rept 1 Jul 96-30 Jun 97

Corporate Author : DARTMOUTH COLL HANOVER NH

Personal Author(s) : Weaver, John B.

PDF Url : ADA332450

Report Date : JUL 1997

Pagination or Media Count : 12

Abstract : We are progressing well toward the original goals delineated in the grant. The MR sequences have been written to measure vibrations in all three directions. No attenuation of the vibration can be observed across a homogeneous sample. No vibration is seen in directions perpendicular to the induced vibration. These two results suggest that a simple linear model is appropriate. A linear model allows the elasticity to be calculated directly without elaborate calculations. This is encouraging. We have written and tested code to calculate the elasticity from measured phase changes assuming a linear model for the vibration. We are concentrating on increasing the phase changes by increasing the amplitude of the vibration and the strength of the magnetic field gradients.

Descriptors :   *MAGNETIC RESONANCE, *BREAST CANCER, LINEAR SYSTEMS, DENSITY, MAGNETIC FIELDS, MECHANICAL PROPERTIES, TISSUES(BIOLOGY), ELASTIC PROPERTIES, THREE DIMENSIONAL, ANISOTROPY, IMAGES, GRADIENTS, MAMMARY GLANDS.

Subject Categories : Medicine and Medical Research
      Optics
      Nuclear Physics & Elementary Particle Physics

Distribution Statement : APPROVED FOR PUBLIC RELEASE