Exam 22: Computed Tomography Simulation

A CT scanner specifically designed for use in the radiation therapy department should have which characteristics? I.High performance scanner II.Laser and patient marking system III.Virtual simulation capabilities

When using intravenous (IV)contrast to enhance the anatomy of the brain, the best interval for contrast administration should be before the scan by _____________.

Of the following list of contrast agents, which is not water soluble and therefore should not be used in the gastrointestinal tract if there is an increased risk of perforation?

The reconstructed field of view that is displayed on the computer monitor should be large enough to display which of the following? I.Entire contour II.Immobilization device III.Pertinent anatomy only

Image registration or fusion has all of the following characteristics except which of the following?

Of the four methods by which contrast media may be introduced into the body, which are the most common in CT simulation? I.Oral II.Intrathecal III.Intravascular IV.Intra-articular

Which of the following is the window width on a CT image?

Which of the following is the window level on a CT image?

A contraindication for administering barium-based contrast to a patient with a history of long-term steroid therapy would be an increased risk of _______________.

What is a maximum intensity projection, or MIP?

Which of the following are benefits of CT simulation? I.The ability to outline critical structures and view these structures in three dimensions II.Machine setup parameters and treatment accessories unable to be verified on the CT scanner III.Virtual simulation allows for construction of digitally reconstructed radiographs DRRs without the patient being present