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2013 ; 2013
(ä): 729271
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Feasibility of detecting pulmonary embolism using noncontrast MRI
#MMPMID24967277
Mudge CS
; Healey TT
; Atalay MK
; Pezzullo JA
ISRN Radiol
2013[]; 2013
(ä): 729271
PMID24967277
show ga
Purpose. The purpose of this study was to evaluate the feasibility of detecting
pulmonary emboli utilizing noncontrast magnetic resonance imaging techniques in
patients with known pulmonary embolism. Materials and Methods. Eleven patients
were enrolled in a study to evaluate right ventricular function by cardiac MRI in
patients diagnosed with acute pulmonary embolism on CT pulmonary angiogram.
Cardiac MRI was performed as soon as possible following pulmonary embolism
detection. Two independent observers reviewed the precontrast portion of each
MRI, scoring right, left, and lobar arteries as positive or negative for PE. The
CTs were reviewed and interpreted in the same manner. Results. MRI was obtained
on average of 40 hours after the CT. Forty-eight vessels were affected by PE on
CT, 69% of which were identified on MRI. All eight pulmonary emboli located in
the right or left pulmonary arteries were detected on MRI. Of the 15 pulmonary
emboli that were not detected on MRI, 7 were subsegmental, 6 were segmental, and
2 were located in a branch not included in the MRI field of view. Conclusions.
Most pulmonary emboli detected on CT were identified on noncontrast MRI, even
though our MRI protocol was not optimized for pulmonary artery visualization.