This atlas focuses on the imaging and treatment options available for giant intracranial aneurysms since 1990s in the beginning of the so-called modern endovascular era. During this period, there were significant advances made in the therapy of small intracranial aneurysms though the treatment of giant aneurysms continued to pose an insurmountable challenge. At the turn of this century, this grim scenario gradually improved with better understanding of the pathophysiology of giant intracranial aneurysms. This changed scenario in giant intracranial aneurysm therapy has been...