title: Tracking coronary calcification by using dual-section spiral CT: a 3-year follow-up.
abstract: OBJECTIVE
  To investigate the accuracy of dual-section spiral computed tomography (CT) in tracking the progression of coronary calcification, as measured during a 3-year follow-up.
  
  
  METHODS
  Two hundred forty-six patients with hypertension (mean age, 66 years +/- 6 [SD]) were preselected in accordance with the International Nifedipine Study Intervention as a Goal for Hypertension Therapy protocol. Subjects had no clinical coronary arterial disease prior to the study and no cardiovascular events during follow-up. All participants underwent baseline CT (3.2-mm section thickness; reconstruction increment, 1.5 mm) and follow-up CT after 3 years. Calcification progression was defined as any increase in total calcification score (TCS) and analyzed in accordance with five baseline TCS categories: 1-9, 10-35, 36-100, 101-250, and greater than 250.
  
  
  RESULTS
  At baseline CT, 152 patients had a TCS greater than 0, and 106 (70%) showed progression after 3 years, while 94 had a baseline TCS of 0; of these, 26 (28%) showed progression (P: <.01 between groups). The mean TCS was significantly higher in each baseline TCS category after 3 years. The percentage increase was negatively correlated with baseline TCS (P: <.01) and ranged from 466% in the lowest category to 38% in the highest.
  
  
  CONCLUSIONS
  Dual-section spiral CT depicts significant change in TCS over time and is useful in tracking calcified coronary atherosclerosis.
authors.affiliation: Cardiac Rehabilitation Institute, Chaim Sheba Medical Center, Tel-Hashomer 52621, Israel. dshemesh@netvision.net.il
authors.forename: J
authors.initials: J
authors.lastname: Shemesh
authors.forename: S
authors.initials: S
authors.lastname: Apter
authors.forename: C I
authors.initials: CI
authors.lastname: Stroh
authors.forename: Y
authors.initials: Y
authors.lastname: Itzchak
authors.forename: M
authors.initials: M
authors.lastname: Motro
mesh_terms: D000368:Aged; D002114:Calcinosis / Q000000981:diagnostic imaging*; D017023:Coronary Angiography; D003327:Coronary Disease / Q000000981:diagnostic imaging*; D018450:Disease Progression; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D008297:Male; D008875:Middle Aged; D011446:Prospective Studies; D014057:Tomography, X-Ray Computed