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A radiograph of an AP knee reveals rotation with almost total superimposition of the fibular head and the proximal tibia. What must the technologist do to correct this positioning error on the repeat exposure?

A patient comes to radiology for a double-contrast barium enema. The patient cannot lie on her side during the study. Which of the following projections could replace the lateral rectum projection?

A geriatric patient comes to radiology for a lumbar spine series. She has severe kyphosis of the thoracolumbar spine. Which one of the following modifications should be applied to this patient?

The element carbon forms the basis of study in Organic Chemistry. Which statement about the element carbon is FALSE?

For the AP weight-bearing knee projection on an average patient, the central ray should be:

Which element is a halogen in period 4?

hydrogen

All atoms of a particular element have identical chemical properties.

An atom cannot be created, divided, destroyed, or converted to any other type of atom.

In nature, the element neon exists as three different isotopes: Ne-20, Ne-21, and Ne-22. Which isotope would be the most abundant in a sample of neon?