American Board of Orthodontics (ABO) Practice Exam 2026 - Free Orthodontics Practice Questions and Study Guide

Question: 1 / 660

What is the expected FOV for a full head CBCT scan?

10-15 cm

5-7 cm

7-10 cm

Greater than 15 cm

In a full head cone beam computed tomography (CBCT) scan, the expected field of view (FOV) is indeed greater than 15 cm. This extensive FOV is necessary to capture the complete anatomy of the head and neck, including the maxilla, mandible, and related structures.

Full head scans are typically utilized to assess comprehensive dental and skeletal relationships, which require a wider imaging area to ensure that all relevant anatomical features are included. This includes evaluating conditions like impacted teeth, tumors, and the relationship of the jaw to the cranial base.

Smaller FOVs are generally used for focused imaging of specific areas, such as single tooth assessments or localized regions of interest. These options, while useful in different contexts, do not encompass the requirements for a full head scan, which demands the broader range to accommodate all anatomical structures of interest.

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