Final answer:
When imaging through a fiberglass cast, it is typically necessary to increase technical factors. An increase of 3 to 4 kilovoltage peak (kVp) is often recommended, and adjustments in exposure time and milliamperes (mAs) may also be needed. Image analysis software can be used to improve the quality of the image.
Step-by-step explanation:
To answer the question of how much one needs to increase technical factors when imaging through a fiberglass cast, we must consider the physics of diagnostic imaging. A cast can inhibit the passage of X-rays, making it necessary to adjust the typical exposure parameters to obtain a clear image. The increase will depend on the thickness and density of the cast material. For a fiberglass cast, a frequently recommended adjustment is an increase of 3 to 4 kilovoltage peak (kVp), which enhances the penetration power of the X-rays. Depending on the specific clinical situation and the part of the body being imaged, further adjustments to the exposure time and milliamperes (mAs) might also be advisable to ensure sufficient exposure without overexposing the patient.
Using image analysis software can further improve the quality of the image obtained through the cast by enhancing contrast and detail apparent within the image. To accommodate for the absorption of X-rays by a cast (which is generally less than through bodily tissue), it is crucial to consider the characteristics of both the tissue and the cast when determining the degree of adjustment needed.