American Registry of Radiologic Technologists (ARRT) Practice Exam

What imaging technique is commonly used to visualize the esophagus?

1. Computed Tomography

2. X-ray fluoroscopy

3. Ultrasound

4. Magnetic Resonance Imaging

The correct answer is: X-ray fluoroscopy

The imaging technique that is commonly used to visualize the esophagus is X-ray fluoroscopy. This method allows for real-time visualization of the esophagus as a patient swallows barium, a contrast agent that enhances the imaging. During fluoroscopy, continuous X-ray images are captured, providing dynamic assessment of esophageal motility and structure, which is particularly useful for diagnosing conditions such as esophageal strictures, tumors, and motility disorders. While other imaging modalities like computed tomography can produce detailed images of the esophagus, they are not typically used for real-time functional assessment. Ultrasound is generally not effective for imaging the esophagus due to the air-filled nature of the gastrointestinal tract, which can create difficulties in obtaining clear images. Magnetic resonance imaging is more suited for soft tissue evaluations and is not the first choice for assessing the esophagus, especially when dynamic function is a consideration. Therefore, X-ray fluoroscopy stands out as the most appropriate and commonly employed technique for visualizing the esophagus.