题目内容

During a barium swallow imaging procedure, why is a third view, at an oblique angle necessary?

A. a) To ensure all parts of the organ are imaged.
B. b) In case the previous images didn’t turn out.
C. c) To check for artefacts.

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Why is barium sulphate commonly used to improve X-ray image contrast of soft tissues?

A. a) It is much more dense than soft tissues, and non-toxic in solution.
B. b) It is extremely soluble in water.
C. c) It is highly toxic and very reactive.

What is the major problem with X-ray imaging of soft tissues?

A. a) Absorption of X-rays by soft tissue is low.
B. b) Different types of soft tissues cannot be differentiated.
C. c) Both a) and b).

In diffusion weighted imaging, restricted diffusion results in:

A. ) lower signal intensity.
B. ) higher signal intensity.
C. ) no change in signal intensity.

In a T2-weighted image, contrast between tissues can be optimised by selecting an appropriate:

A. ) T
B. ) TR.
C. ) TI.

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