Cook pasta according to package directions, omitting salt and fat.
While pasta cooks, coat a large nonstick skillet with cooking spray; place over medium-high heat until hot. Add artichokes and mushrooms; cook 3 to 4 minutes or until mushrooms are tender. Add alfredo sauce to artichoke mixture; cook until thoroughly heated.
Place drained pasta in a large bowl. Pour sauce mixture over pasta; toss to combine. Sprinkle with cheese.