What accounts for most of the repeated radiographs (retakes/repeats) today?

• A. incorrect film storage
• B. incorrect selection of PRIMARY FACTORS
• C. lack of collimation
• D. incorrect film processing

Answer: (B)

The most frequent reason for repeat radiographs is incorrect selection of the primary exposure factors. These primary factors—mA (tube current), exposure time, kVp (voltage), and the distance from tube to patient—set how much radiation reaches the film and determine image density and contrast. If they’re chosen incorrectly for the patient’s size and the body part being imaged, the resulting image is under- or overexposed and non-diagnostic, necessitating a retake. This control over exposure is the most variable and routinely adjusted part of technique, so errors here occur most often in daily practice. Other issues like film storage, processing, or collimation can cause image quality problems as well, but they’re less frequently the primary cause of a repeat since they involve equipment or workflow factors rather than the immediate technique decision for that exposure.