What is the primary purpose of adjusting the kVp and mA in fluoroscopy?

The primary purpose of adjusting the kilovolt peak (kVp) and milliampere (mA) settings in fluoroscopy is to optimize image quality while minimizing radiation exposure to the patient.

Adjusting the kVp affects the penetrating power of the X-rays being produced. A higher kVp allows for greater penetration of tissues, which can result in clearer images of structures that are denser, such as bone. Conversely, a lower kVp may enhance contrast between different soft tissues but may not penetrate as effectively. This balance is crucial because it impacts both the clarity of the images and the amount of radiation the patient receives.

The mA setting controls the quantity of X-ray photons generated. Higher mA settings result in more X-rays being produced, which can improve image quality by reducing noise and thus minimizing the mottle effect in the images. However, it also increases radiation exposure to the patient. On the other hand, lowering the mA can help reduce radiation exposure but may lead to a noisier image.

Adjusting these parameters is vital for achieving the best possible diagnostic images while protecting the patient from unnecessary radiation. Thus, minimizing radiation exposure is a key consideration for both patient safety and the effectiveness of the imaging procedure.