title: Spiral CT quantification of aorto-renal calcification and its use in the detection of atheromatous renal artery stenosis: A study in 42 patients.
abstract: OBJECTIVE
  To investigate whether a correlation exists between aortic and renal arterial calcifications detected with spiral CT and significant angiographic renal artery stenosis (RAS).
  
  
  METHODS
  Forty-two patients (mean age 67 years, range 37-84 years), of whom 24 were hypertensive, prospectively underwent abdominal helical CT and aortic and renal arteriography. The 3-mm thickness CT scans (pitch = 1) were reconstructed each millimeter. A manual outline of the renal artery including its ostial portion was produced. Calcific hyperdensities were defined as areas of density more than 130 HU. CT data were compared with the presence or absence of RAS on angiography (24 cases); hypertension and age were taken into account (Mann-Whitney U-test).
  
  
  RESULTS
  CT detection and quantification appeared to be reliable and reproducible. We did not find any correlation between aortic and renal arterial calcifications and RAS, even for the patients above 65 years, with or without hypertension. There was no correlation either between calcifications and hypertension in patients without RAS.
  
  
  CONCLUSIONS
  In this population, aortic and renal arterial calcifications have no predictive value for RAS.
authors.affiliation: Department of Radiology, University Hospital, BP 69, F-63003 Clermont Ferrand, France.
authors.forename: P
authors.initials: P
authors.lastname: Gayard
authors.forename: J M
authors.initials: JM
authors.lastname: Garcier
authors.forename: J Y
authors.initials: JY
authors.lastname: Boire
authors.forename: A
authors.initials: A
authors.lastname: Ravel
authors.forename: N
authors.initials: N
authors.lastname: Perez
authors.forename: C
authors.initials: C
authors.lastname: Privat
authors.forename: P
authors.initials: P
authors.lastname: Lucien
authors.forename: J F
authors.initials: JF
authors.lastname: Viallet
authors.forename: L
authors.initials: L
authors.lastname: Boyer
mesh_terms: D000368:Aged; D001012:Aorta, Abdominal; D001018:Aortic Diseases / Q000000981:diagnostic imaging*; D001161:Arteriosclerosis / Q000000981:diagnostic imaging*; D002114:Calcinosis / Q000000981:diagnostic imaging*; D005260:Female; D006801:Humans; D006978:Hypertension, Renovascular / Q000000981:diagnostic imaging; D008297:Male; D011237:Predictive Value of Tests; D011446:Prospective Studies; D012078:Renal Artery Obstruction / Q000000981:diagnostic imaging*; D014057:Tomography, X-Ray Computed / Q000379:methods*