Renal Perfusion Assessment in the Endovascular Treatment of Renal Artery Stenosis

The clinical benefits of endovascular treatment in renal artery stenosis remain controversial. This study uses arterial spin labelling MRI and flat-panel detector parenchymal blood volume imaging to observe the change in renal perfusion after endovascular treatment in renal artery stenosis.

Inclusion Criteria:patients who provided informed consentpatients who were diagnosed with RAS by CTA, MRA, or Doppler ultrasonographypatients who were aged 18 years or olderpatients whose intervened renal arteries were not completely occluded (confirmed by DSA)the stenosis percentage exceeding 70%patients who had uncontrolled blood pressure or impaired renal functionpaitents whose affected kidney did not have total loss of functionExclusion Criteria:were pregnanthad a history of renal transplantation or renal artery bypass surgerywere allergic to iodine contrast mediumhad other contraindications of endovascular treatmentcontraindications of MRI examinationshad technical failure in the endovascular treatment.