Problem #3 - MRI of healthy human man

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Problem #3 - MRI of healthy human man

An MRI scan is an good example of a volume dataset. Here the density of tissues is recorded to create a series of images along slicing planes. In this problem you will learn how to manipulate N-D arrays and display the results of slicing the dataset along various directions.

Goal: Display a multidimensional dataset two ways. Display a single slice as an image and use the slice function to visualize the data in 3-D.

Key concepts: Multidimensional arrays, N-D indexing, slicing.

Key functions: Multidimensional indexing, slice, reshape, whos, size

What to do

The file mri.mat (from the Image Processing Toolbox) contains a 4-D dataset that represents an MRI scan of a healthy male. It is stored as 27 grayscale images. Load the dataset and determine its size with whos or size.
Display the 17th slice as an image.
slice is a volume visualization function that displays slices of a 3-D dataset as planes with the correct orientation. Use slice to display the 17th slice of the dataset as well as slices along the 70th column (x-axis) and 40 and 85th rows (y-axis). Since slice only works on 3-D double precision arrays, you may need to use double and reshape first.

[hint] [Show me the solution]