No... that doesn't make sense.
You need to either let the DOM rendering engine create elements for you, and then reference the myEM.view to access the htmlElement. Or you can create your own DOM element and assign it to myEM.view. Canvas won't work this way.
If you want to access them by their ids, you'll have to create your own elements and then manually assign them to the .view property in a PhysicsJS body (your myEM)
If you want to use canvas you'll have to use the canvas rendering engine, which stores Images inside the .view property.
If you create a jsFiddle of your work I could more easily see what you're trying to do.