When imaging long bones, which of the following is (are) cor…

When imaging long bones, which of the following is (are) correct statement(s)?1. Choose a large enough IR so that one or both joints are included on the projection.2. Extend the collimation field so it extends 1 to 2 inches (2.5 cm to 5 cm) beyond the joints spaces as required.3. Histogram errors may occur if the system algorithm does not recognize a diagonal exposure field.4. Align the long bone parallel to the IR to prevent a histogram analysis error.