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

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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    Boyd and Knight classification of talar body fractures

    Boyd and Knight classification of fractures of the body of talus divides them into two basic groups that can be further divided according to displacement.

    Type Description
    Type I - Coronal or sagittal shear fracture
    Type Ia undisplaced
    Type Ib displacement at ankle joint
    Type Ic displacement at ankle and subtalar joint
    Type Id total displacement
    Type II - Horizontal shear fracture
    Type IIa undisplaced
    Type IIb displaced


    1. Boyd HB, Knight RA. Fractures of the astragalus. South Med J. 1942;35:160–167.
    Ebraheim NA, Patil V, Owens C, Kandimalla Y. Clinical outcome of fractures of the talar body. Int Orthop. 2008 Dec;32(6):773–7.

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