Welcome to Classifications and Online Calculators in Radiology

This site was build along with the Atlas of Radiology Images to support your knowledge in radiology.

You will find here:

that are used in radiology and related fields with free access.

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The concept of this website is based on a previous site that was founded in 2008 and is still up and running. The website is composed as a book, where all sources are properly referenced, according to a good practice in scientific publications.

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    Calcium score (Agatston) - risk level for significant coronary artery disease (CAD)

    Coronary calcium score is an independent predictor of risk of significant coronary artery disease. It may refine overall risk of coronary artery disease estimated with conventional risk factors. It is based on CT examination and calculation of the Agatston score from the images.

    Calcium score Risk of significant CAD
    0 very low
    ≤10 low
    ≤100 moderate
    ≤400 moderately high
    >400 high

      Youssef et al. used a different description for calcium score intervals:

    Calcium score Risk RR
    <100 average risk 1.9
    <400 moderate risk 4.3
    <1000 high risk 7.2
    ≥1000 very high risk 10.8

    References:

    1. Youssef G, J. Budoff M. Coronary artery calcium scoring, what is answered and what questions remain. Cardiovascular Diagnosis and Therapy. 2012 Jun 27;2(2):94–105
    2. Budoff MJ, Achenbach S, Duerinckx A. Clinical utility of computed tomography and magnetic resonance techniques for noninvasive coronary angiography. J Am Coll Cardiol. 2003 Dec 3;42(11):1867–78.
    3. Liu Y-C, Sun Z, Tsay P-K, Chan T, Hsieh I-C, Chen C-C, et al. Significance of Coronary Calcification for Prediction of Coronary Artery Disease and Cardiac Events Based on 64-Slice Coronary Computed Tomography Angiography. BioMed Research International. 2013 Mar 17.
    4. Pletcher MJ, Tice JA, Pignone M, Browner WS. Using the coronary artery calcium score to predict coronary heart disease events: A systematic review and meta-analysis. Arch Intern Med. 2004 Jun 28;164(12):1285–92.
    5. Shaw LJ, Raggi P, Callister TQ, Berman DS. Prognostic value of coronary artery calcium screening in asymptomatic smokers and non-smokers. Eur Heart J. 2006 Apr 1;27(8):968–75

    6. Rumberger JA, Brundage BH, Rader DJ, Kondos G. Electron beam computed tomographic coronary calcium scanning: a review and guidelines for use in asymptomatic persons. Mayo Clin Proc. 1999 Mar;74(3):243–52
    7.
    Halliburton SS, Stillman AE, White RD. Noninvasive quantification of coronary artery calcification: methods and prognostic value. Cleve Clin J Med. 2002;69 Suppl 3:S6–11.

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