IMPROVEMENTS IN DIFFUSION-WEIGHTED MAGNETIC RESONANCE IMAGING

摘要

The apparent diffusion coefficient of biological tissue can be estimated using weighted-diffusion measurement data produced for a known b-value in combination with baseline measurement data, such as STIR data, T2-weighted data, etc. produced by a magnetic resonance imaging apparatus (3), when at least one reference sample (5) of known diffusion properties is imaged at the same time as the tissue. The known diffusion values can be temperature-adjusted based on a temperature measurement made by evaluating, in MRI image data, the length of a liquid column in an MRI thermometer (30) that includes a relatively large reservoir (33) and a measurement tube (31) of cross-section 1 millimetre or larger.