Magnetic Resonance Imaging of Pulmonary Embolism: Diagnostic Accuracy of Unenhanced MR and Influence in Mortality Rates
| Autor: | Lilian Pasin, Matheus Zanon, Edson Marchiori, Ana Luiza Schneider Moreira, Guilherme Watte, Bruno Hochhegger, José Cláudio Fonseca Moreira |
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| Rok vydání: | 2016 |
| Předmět: |
Pulmonary and Respiratory Medicine
Adult Male medicine.medical_specialty Computed Tomography Angiography Diagnostic accuracy 030204 cardiovascular system & hematology 030218 nuclear medicine & medical imaging 03 medical and health sciences Young Adult 0302 clinical medicine Predictive Value of Tests Medicine Humans Prospective Studies Computed tomography angiography Aged Intravenous contrast Aged 80 and over Ct pulmonary angiography medicine.diagnostic_test business.industry Mortality rate Magnetic resonance imaging Middle Aged medicine.disease Magnetic Resonance Imaging Pulmonary embolism Survival Rate Embolism ROC Curve Area Under Curve Female Radiology business Pulmonary Embolism |
| Zdroj: | Repositório Institucional PUCRS Pontifícia Universidade Católica do Rio Grande do Sul (PUCRS) instacron:PUC_RS |
| ISSN: | 1432-1750 |
| Popis: | We evaluated the diagnostic value for pulmonary embolism (PE) of the True fast imaging with steady-state precession (TrueFISP) MRI, a method that allows the visualization of pulmonary vasculature without breath holding or intravenous contrast. This is a prospective investigation including 93 patients with suspected PE. All patients underwent TrueFISP MRI after undergoing CT pulmonary angiography (CTPA). Two independent readers evaluated each MR study, and consensus was obtained. CTPA results were analysed by a third independent reviewer and these results served as the reference standard. A fourth radiologist was responsible for evaluating if lesions found on MRI for both analysis were the same and if these were the correspondent lesions on the CTPA. Sensitivity, specificity, predictive values and accuracy were calculated. Evidence for death from PE within the 1-year follow-up was also assessed. Two patients could not undergo the real-time MRI and were excluded from the study. PE prevalence was 22%. During the 1-year follow-up period, eight patients died, whereas PE was responsible for 12.5% of cases. Between patients who developed PE, only 5% died due to this condition. There were no differences between MR and CT embolism detection in these subjects. MR sequences had a sensitivity of 85%, specificity was 98.6% and accuracy was 95.6%. Agreement between readers was high (κ= 0.87). Compared with contrast-enhanced CT, unenhanced MR sequences demonstrate good accuracy and no differences in the mortality rates in 1 year were detected. |
| Databáze: | OpenAIRE |
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