'Image artifacts' presentation slideshows

Chapter 12 Image Artifacts

Chapter 12 Image Artifacts. Assumptions for two-dimensional echo mapping. Violations of these assumptions produce artifacts in the image: The transmitted wave travels along a straight-line path from the transducer to the object and back to the transducer.

501 views • 37 slides

Pressure Intensity

Pressure Intensity . The pressure intensity at a point can be calculated using the solution of wave equation: 1D case Circular aperture The pressure distribution is proportional with the fourier transform of the aperture. Side Lobes.

372 views • 24 slides

IMAGE ARTIFACTS

IMAGE ARTIFACTS. What is an ARTIFACT. Any irregularity on an image that is not caused by the proper shadowing of tissue by the primary beam. an undesirable optical density on radiograph. How are they produced?. Exposure Processing Handling & Storage. ARTIFACT FROM EXPOSURE.

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Are You Ready to G xm O?

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SENSE is simple!

SENSE is simple!. % load up data (coil maps in s1 & s2; images in im1 & im2) load sense_data.mat; %im is output matrix [Nx Ny]=size(im1); im=zeros(2*Nx,Ny); % SENSE (neglecting noise covariance) for x=1:Nx, dx=mod((x-1+Nx/2),Nx)+1; for y=1:Ny,

141 views • 4 slides