The terminology you are looking for is "Volume Renderig"
A MRI scan scans a "volume" (object). You get a point closecloude, with different density of different matter, for example skin/blood har different density. The you can use the point cloud to do volune rendering.
So what you want to do is go make your mest Into a point cloud, with density, density depending on what matter the volume contains. Then you want to har that data for volume rendering.
Then you can yourself decide how/what to render, slice through the data or whatever