Spiral or helical angioscanography for the positive or differential diagnosis of pulmonary emboli has become an emerging technique but remains poorly practised and has been little assessed scientifically. The optimal conditions to perform the test should be understood. The physician should appreciate in view of a large choice of parameters, the diagnostic value of the result and its reliability proximally and distally. Pulmonary angiography is only indicated when the angioscanography is negative according to the degree of clinical and paraclinical suspicion. Angiography magnetic resonance imaging is a diagnostic test full of promise which does not yet have its place in routine practice.