Salaun et al publish their experience using a simple algorithm for management of 321 consecutive patients with suspected pulmonary embolism at one center in France. The tool sought to avoid CT-angiography (and associated radiation) wherever possible, instead favoring leg ultrasounds and ventilation-perfusion scans. Only the indeterminate cases (a mere 35, or 11%) underwent CT-A. In all, 98 people were diagnosed with and treated for PE. Of the patients "ruled out" for pulmonary embolism, only 1 had a clinical PE over the next 3 months (0.53%).