CAMRT Radiography Practice Exam

What must be included in all projections of the thumb?

1. From distal tip of thumb to trapezium

2. Entire length of thumb

3. Distal phalanx only

4. Just the thumb joint

The correct answer is: From distal tip of thumb to trapezium

The correct choice outlines the importance of demonstrating the full anatomy and relevant structures in radiographic projections, particularly for the thumb. When capturing an image, it is essential to visualize everything from the distal tip of the thumb to the trapezium, which is the carpal bone that articulates with the base of the thumb. This inclusion ensures that all potential injuries, alignment issues, or pathologies affecting both the thumb and the associated carpal structure are adequately assessed. In radiography, the base of the thumb's anatomy, including its joint with the trapezium, is critical for a comprehensive evaluation. If only the entire length of the thumb or just the thumb joint were captured, there would be gaps in information that might overlook relevant clinical details, such as fractures or dislocations that could occur at the trapezium or along the thumb's length. The emphasis is on capturing the entire anatomical area in question to provide sufficient diagnostic information. Thus, the first option specifies the area that must always be included to meet these clinical standards effectively.