Identify a key ethical principle guiding radiologic practice.

The principle of beneficence is a fundamental ethical guideline in radiologic practice, emphasizing the importance of acting in the best interest of the patient. This principle necessitates that healthcare professionals prioritize patient welfare and make decisions that contribute to the overall well-being and health outcomes of the individual undergoing imaging procedures. In practice, this means ensuring that the risks associated with imaging are outweighed by the benefits, maintaining a commitment to improve patients' health, and being attentive to their needs throughout the diagnostic process.

In contrast to this principle, the other options do not align with ethical practices in healthcare. Profit maximization may prioritize financial gain over patient care, and minimizing patient contact can compromise the quality of care and patient-centered approaches. Similarly, focusing solely on technological advancement can lead to neglecting the human aspect of care and the importance of patient safety and comfort. Beneficence stands out as the guiding principle that consistently aims to enhance patient outcomes and ensure ethical practice within the field.