Problem $1(10$ pts$)$ Open ct$1.$dcm$.$ Read CT data and plot the image. Make sure that image raw values are converted to HU values by using RescaleSlope and RescaleIntercept information contained in CT header. When plotting the image, specify the colormap limits to $[500,500].$ Calculate the maximum and minimum intensity values of the image.

$[$Hint$]$ When CT data is loaded in MATLAB, it is read as unit$16(16-$bit unsigned integer type$).$ The data may need to be converted to int$16(16-$bit signed integer type$).$ In this case, please use int$16()$ function in MATLAB. This process is particularly relevant to the step of generating a normalized histogram using MATLAB function $$imhist$$ in Problem $2.$ But, you can process data using any methods that can appropriately generate a histogram.

e$.$g$.$ image$\_$raw $=$ int$16($image$\_$raw$)$;