An implantable medical device includes a radiolucent member provided with an x-ray mirror that reflects incident x-ray radiation to enable visualization of the device. The x-ray mirror includes a multilayer nanolaminate having alternating layers of a first metal or ceramic layer deposited by atomic layer deposition having a first refractive index, and a second metal or ceramic layer deposited by atomic layer deposition having a second refractive index that is different from the first refractive index. The nanolaminate includes a total of at least four layers.