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Give the answer to the following calculation to the correct number of significant figures. (5.0 × 10-4) – (6 × 10-5) = ?

How many valence electrons are present in a chloride ion, Cl ??

In which state does matter have an indefinite shape and definite volume?

Why is it important for the technologist to review the patient’s chart and inform the radiologist before beginning the BE exam if a biopsy was performed as part of a prior sigmoidoscopy or colonoscopy procedure?

A radiograph of a PA Caldwell projection for sinuses reveals that the petrous ridges are projected into the lower one third of the maxillary sinuses. Which of the following modifications should be made during the repeat exposure to produce a more diagnostic image?

A patient comes to radiology for an esophagogram. The radiologist is concerned about the upper portion of the esophagus, near the level of T1, which did not visualize well on the previous routine projection-position esophagogram. Which of the following special projections and/or positions would be most helpful in demonstrating this region?

Radiographs of the foot are ordered, to be completed weight-bearing. The AP image requires the central ray to be:

Consider the following set of numbers. If the true value is 12.6 cm2, which of the following best describes the set of numbers? 12.6 cm2, 12.5 cm2, 12.6 cm2

One radiograph of an upper GI series needs repeating. The technologist is unsure which projection and/or position is seen on this radiograph. The fundus is filled with barium and the pylorus and duodenal bulb are profiled and air filled. The patient was recumbent for all projections. Which projection and/or position needs to be repeated?

Which temperature scale does not use a degree sign?