Question

A parallax technique was developed using an SFD of 36 in. (914 mm), a tube shift of 15 in. (381 mm), and a change in the position of the discontinuity was measured at 0.5 in. (12.7 mm). Provided with this information, determine the depth of the discontinuity from the film, imaging plate (IP), or detector plane in material that is 2 in. (51 mm) in thickness.

Answer 1

To calculate the depth of the discontinuity, we can use the parallax technique. The formula Depth = (tube shift * discontinuity change) / SFD can be used to determine the depth of the discontinuity. In this case, the depth is approximately 0.208 in (5.3 mm).

Step-by-step explanation:

To calculate the depth of the discontinuity, we can use the parallax technique. The parallax technique compares the change in position of an object when viewed from different angles. In this case, we have an SFD (source-to-film distance) of 36 in (914 mm) and a tube shift of 15 in (381 mm). The change in the position of the discontinuity is measured at 0.5 in (12.7 mm).

To determine the depth of the discontinuity, we can use the following formula:

Depth = (tube shift * discontinuity change) / SFD

Plugging in the values, we get:

Depth = (15 in * 0.5 in) / 36 in = 0.208 in

Therefore, the depth of the discontinuity from the film, IP, or detector plane in material that is 2 in (51 mm) in thickness is approximately 0.208 in (5.3 mm).