To review the most important measurements for lowerlimb radiographic evaluation, including measurements for evaluation of the hip, knee, ankleand footjoints.

Conventional radiography is usually the first imaging modality used to study the musculoskeletal system, because of its wide availability, quick access and low cost. However, its interpretation isn’t always straightforward, so the radiologist should use every tool available for the best possible evaluation. There are multiplemeasurements described in upper limb radiographic evaluation, which provide diagnostic criteria for several disorders.

Here we present the most useful radiographic measurements for the lowerlimb, more specifically for the hip, knee, ankleand footjoints. We will provide clear depiction of the correct application of these measurements. · FULL-LENGHT LOWER LIMB 1. Mechanical and anatomical axis of the lower limb Projection(s) Anteroposterior lower limbs full-length standing radiograph Purpose Evaluate the alignment of the lower limbs Technique The mechanical axis (Fig. 1) passes through the center of the femoral head and through the center of the ankle joint (midpoint of the tibial...

Although sometimes overlooked, conventional radiography often provides important evidence of diagnostic value. Using the available tools, namely simple and quick radiographic measurements, the radiologist should be able to provide straight answers in several clinical situations regarding the musculoskeletal system of the lowerlimb.

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