Computed Tomography Technologist Practice Exam

The correct reference number for the CTDIvol (Computed Tomography Dose Index volume) for an adult head is 75 mGy. This value is established by the American College of Radiology (ACR) as a guideline to ensure patient safety and minimize radiation exposure during CT imaging of the head.

CTDIvol provides a standardized way to report the radiation dose for a specific CT examination, allowing for comparisons and assessments of imaging protocols across different machines and facilities. The ACR reference values are determined based on extensive clinical research that considers the average doses associated with standard imaging practices, which helps technologists maintain a balance between image quality and patient safety.

In contrast, the other values – 50 mGy, 60 mGy, and 90 mGy – do not align with the ACR guidelines for the adult head and typically reflect either lower or higher doses that may not be appropriate for routine practice in these specific examinations. Understanding the standardized reference dose is crucial for CT technologists to optimize imaging protocols while adhering to diagnostic standards.