Which information must technique charts indicate for proper radiography?

• A. Speed of Film or Digital Receptor, Patient Size, and Technique Factors (kVp, mA, Time)
• B. Only Film Speed
• C. Only Patient Age
• D. Equipment Model

Answer: (C)

Technique charts are built to guide consistent, diagnostic radiographs by tying together receptor speed, patient size, and the exposure settings. The speed of the film or digital receptor dictates how sensitive the image receptor is to radiation: faster receptors need less exposure to produce an acceptable image, which helps minimize dose. Patient size matters because thicker or denser anatomy requires more radiation to achieve sufficient penetration and image brightness. Finally, the chart must specify the actual technique factors—kVp, mA, and exposure time—so the radiographer can set the exact exposure for the given receptor and patient.

If you only had one piece of information, like receptor speed alone, you wouldn’t know how much exposure the patient needs, since a larger patient or denser area would require different settings. If you only had patient age, that doesn’t reliably predict size or tissue density for exposure. If you focus on the equipment model, that doesn’t tell you how to dial in the correct exposure. By including receptor speed, patient size, and the technique factors together, the chart provides a practical, dose-conscious guide to obtaining a quality image.