Question

How would we expect metal to affect the appearance of a localizer image?

1) the CT number of the tissues in the image will be misrepresented
2) the metal object will be represented by high CT numbers and there will be no streaks
3) the entire image will appear blurry
4) streaks will emanate from the metal object in the image.

Answer 1

Metal objects in a CT localizer image can affect the CT numbers of tissues, create streaks around the metal object, and cause streak artifacts in the image.

Step-by-step explanation:

Metal objects in a CT localizer image can have several effects:

1. The CT number of the tissues in the image will be misrepresented. CT numbers represent the density of tissues, and metal can cause artifacts that distort the CT numbers.
2. The metal object will be represented by high CT numbers, which can make it stand out in the image. However, streaks can also appear around the metal object, which can affect the clarity of the image.
3. Streaks can emanate from the metal object in the image, creating a streak artifact. This artifact can interfere with the interpretation of the image and affect the overall quality of the image.