Roberto Garcia Figueiras MD, Presenter: Nothing to Disclose

Sandra Baleato Gonzalez MD, Abstract Co-Author: Nothing to Disclose

Joan C. Vilanova MD, PhD, Abstract Co-Author: Nothing to Disclose

Antonio Luna MD, Abstract Co-Author: Nothing to Disclose

Maria Cruz Ageitos Casais MD, Abstract Co-Author: Nothing to Disclose

Javier Sanchez MD, PhD, Abstract Co-Author: Research Consultant, Koninklijke Philips NV

Laura Oleaga, Abstract Co-Author: Nothing to Disclose

Diffusion-weighted imaging (DWI) is a magnetic resonance sequencee that gives us functional information of tissues based on the measurement of random movement of water molecules. DWI is actually a basic tool in clinical practice. The aim of this exhibit is: - To explain the fundamental principles of diffusion-weighted imaging (DWI). - To show the mechanism through different features may affect DWI quality and imaging findings. - To show key points for interpreting DW images. - To illustrate troublesome findings on DWI. - To explain advanced applications of DWI in clinical practice.  

1. Principles of DWI. How they affect imaging: selecting b values and bandwith, improving signal/noise ratio, avoiding artifacts. 2. Interpretation of DW images in clinical practice: basic principles. 3. Troublesome findings on DWI: T2 black-out, T2 shine-through, T2 wash-out, normal structures that show a  restricted diffusion, the influence of anisotropy. 4. Quantification of DWI    a) ADC calculation.    b) Biological meaning of ADC. 5. Advanced applications of DWI:    a) Intravoxel incoherent motion.    b) Whole-body DWI.  

http://abstract.rsna.org/uploads/2014/14002709/14002709_kj8k.pdf

Garcia Figueiras, R, Baleato Gonzalez, S, Vilanova, J, Luna, A, Ageitos Casais, M, Sanchez, J, Oleaga, L, No Shades of Grey in Diffusion-weigthed Imaging: Misinterpretations, Misses, & Mimics.  Radiological Society of North America 2014 Scientific Assembly and Annual Meeting, - ,Chicago IL. http://archive.rsna.org/2014/14002709.html