"N: refers to a non-diagnostic study that cannot exclude PE; this may be due to inadequate contrast opacification or motion artefact"
"L: refers to a limited study where there is no central pulmonary embolus, but not all segmental/subsegmental arteries can be interpreted with confidence - this would be denoted as PE-RADS 0L"
"Treatment and prognosis."
"Pulmonary Embolism Reporting and Data System (PE-RADS) is a reporting system for acute pulmonary embolism (PE) on CT and MR pulmonary angiography. It was developed by the American College of Radiology to provide standardised reporting language that incorporates anatomical and accessory findings to guide treatment recommendations 1."
"The PE-RADS categories are based on the anatomical location of the most proximal thrombus 1:"
"PE-RADS 0: none"
"PE-RADS 1: subsegmental"
"PE-RADS 2: segmental"
"PE-RADS 3: lobar/interlobar artery"
"PE-RADS 4: central (main, right, left)"
"PE-RADS N: non-diagnostic study"
"In addition to this, the PE-RADS considers three modifiers and two accessory findings within the standardised reporting that may influence prognosis."
"L: refers to a limited study where there is no central pulmonary embolus, but not all segmental/subsegmental arteries can be interpreted with confidence - this would be denoted as PE-RADS 0L"
"Imaging containing exceptions should include their presumptive type and the location of the filling defect within the report. This may include chronic thromboembolic disease, tumours, exogenous material or air emboli. For example, this can be denoted as PE-RADS 1/E."
"RV+: presence of right ventricular enlargement on imaging"
"For example, this can be denoted as PE-RADS 4/RV+/T+."
"For example, this can be denoted as PE-RADS 4/RV+/T+."
"Patient and facility factors should also be considered along with the PE-RADS classification when deciding on patient management 1:"
"PE-RADS 0: consider alternative diagnosis"
"PE-RADS 1: anticoagulation"
"PE-RADS 1/RV+: anticoagulation + further investigation of right ventricular failure"
"PE-RADS 1/RV+: anticoagulation + further investigation of right ventricular failure"
"PE-RADS 2: anticoagulation"
"PE-RADS 2/RV+: anticoagulation + further investigation of right ventricular failure"
"PE-RADS 2/RV+: anticoagulation + further investigation of right ventricular failure"
"PE-RADS 3 and 4: anticoagulation + PE risk stratification"
"PE-RADS 3/RV+: PE risk stratification + specialist consultation ± reperfusion therapy"
"PE-RADS 3/RV+: PE risk stratification + specialist consultation ± reperfusion therapy"
"PE-RADS 1-4/T+: specialist consultation (cardiac/surgical/interventional radiology)"
"PE-RADS N: repeat or alternative imaging"
"N: refers to a non-diagnostic study that cannot exclude PE; this may be due to inadequate contrast opacification or motion artefact"
"T+: presence of visualised thrombus in the right atrium or right ventricle"
"L: refers to a limited study where there is no central pulmonary embolus, but not all segmental/subsegmental arteries can be interpreted with confidence - this would be denoted as PE-RADS 0L"
"Refers to pulmonary arterial filling defects that are not consistent with an acute pulmonary embolus. This is indicated by E."
"Imaging containing exceptions should include their presumptive type and the location of the filling defect within the report. This may include chronic thromboembolic disease, tumours, exogenous material or air emboli. For example, this can be denoted as PE-RADS 1/E."
"For example, this can be denoted as PE-RADS 4/RV+/T+."
Expected headings
"Image quality"
"Exceptions"
"Cardiac status"
"Treatment and prognosis."
"N: refers to a non-diagnostic study that cannot exclude PE; this may be due to inadequate contrast opacification or motion artefact"