Kontrastní MR angiografie s použitím paralelních akvizičních technik v diagnostice stenózy renální tepny
Contrast-enhanced MR angiography utilizing parallel acquisition techniques in renal artery stenosis detection Objective: The aim of our study was to assess the diagnostic value of contrast- enhanced MR angiography (MRA) utilizing parallel acquisition techniques in the detection of renal artery steno...
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2012
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Online Access: | http://www.nusl.cz/ntk/nusl-311430 |
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ndltd-nusl.cz-oai-invenio.nusl.cz-3114302021-02-26T05:19:48Z Kontrastní MR angiografie s použitím paralelních akvizičních technik v diagnostice stenózy renální tepny Contrast-enhanced MR angiography utilizing parallel acquisition techniques in renal artery stenosis detection Slanina, Martin Žižka, Jan Vymazal, Josef Ferda, Jiří Contrast-enhanced MR angiography utilizing parallel acquisition techniques in renal artery stenosis detection Objective: The aim of our study was to assess the diagnostic value of contrast- enhanced MR angiography (MRA) utilizing parallel acquisition techniques in the detection of renal artery stenosis (RAS). Material and Methods: 81 hypertensive subjects with suspected RAS were examined on a 1.5 T MR system with body array coil. Bolus tracking was used to monitor the arrival of contrast agent to the abdominal aorta. The MRA sequence parameters were as follows: TR 3.7 ms; TE 1.2 ms; flip angle 25ř; acquisition time 18 s; voxel size 1.1 mm × 1.0 mm × 1.1 mm; centric k-space sampling; parallel acquisition techniques with acceleration factor of 2 (GRAPPA). Renal artery stenosis of 60% and more was considered hemodynamically significant. The results of MRA were compared to digital subtraction angiography serving as a standard of reference. Results: Sensitivity, specificity, positive predictive value and negative predictive value of MRA in the detection of hemodynamically significant RAS were 91%, 96%, 94% and 94%, respectively. Prevalence of RAS was 41% in our study population. Conclusion: Contrast-enhanced MRA with high spatial resolution offers sufficient sensitivity and specificity for screening of... 2012 info:eu-repo/semantics/doctoralThesis http://www.nusl.cz/ntk/nusl-311430 cze info:eu-repo/semantics/restrictedAccess |
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Czech |
format |
Doctoral Thesis |
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NDLTD |
description |
Contrast-enhanced MR angiography utilizing parallel acquisition techniques in renal artery stenosis detection Objective: The aim of our study was to assess the diagnostic value of contrast- enhanced MR angiography (MRA) utilizing parallel acquisition techniques in the detection of renal artery stenosis (RAS). Material and Methods: 81 hypertensive subjects with suspected RAS were examined on a 1.5 T MR system with body array coil. Bolus tracking was used to monitor the arrival of contrast agent to the abdominal aorta. The MRA sequence parameters were as follows: TR 3.7 ms; TE 1.2 ms; flip angle 25ř; acquisition time 18 s; voxel size 1.1 mm × 1.0 mm × 1.1 mm; centric k-space sampling; parallel acquisition techniques with acceleration factor of 2 (GRAPPA). Renal artery stenosis of 60% and more was considered hemodynamically significant. The results of MRA were compared to digital subtraction angiography serving as a standard of reference. Results: Sensitivity, specificity, positive predictive value and negative predictive value of MRA in the detection of hemodynamically significant RAS were 91%, 96%, 94% and 94%, respectively. Prevalence of RAS was 41% in our study population. Conclusion: Contrast-enhanced MRA with high spatial resolution offers sufficient sensitivity and specificity for screening of... |
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Žižka, Jan |
author_facet |
Žižka, Jan Slanina, Martin |
author |
Slanina, Martin |
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Slanina, Martin Kontrastní MR angiografie s použitím paralelních akvizičních technik v diagnostice stenózy renální tepny |
author_sort |
Slanina, Martin |
title |
Kontrastní MR angiografie s použitím paralelních akvizičních technik v diagnostice stenózy renální tepny |
title_short |
Kontrastní MR angiografie s použitím paralelních akvizičních technik v diagnostice stenózy renální tepny |
title_full |
Kontrastní MR angiografie s použitím paralelních akvizičních technik v diagnostice stenózy renální tepny |
title_fullStr |
Kontrastní MR angiografie s použitím paralelních akvizičních technik v diagnostice stenózy renální tepny |
title_full_unstemmed |
Kontrastní MR angiografie s použitím paralelních akvizičních technik v diagnostice stenózy renální tepny |
title_sort |
kontrastní mr angiografie s použitím paralelních akvizičních technik v diagnostice stenózy renální tepny |
publishDate |
2012 |
url |
http://www.nusl.cz/ntk/nusl-311430 |
work_keys_str_mv |
AT slaninamartin kontrastnimrangiografiespouzitimparalelnichakvizicnichtechnikvdiagnosticestenozyrenalnitepny AT slaninamartin contrastenhancedmrangiographyutilizingparallelacquisitiontechniquesinrenalarterystenosisdetection |
_version_ |
1719379835219869696 |