Tracheal Mirror Image Artifact in Patients With Normal and Pathologic Tracheas

Area of Science:

• Medical Imaging
• Diagnostic Ultrasound
• Pulmonology

Background:

• Ultrasonography is increasingly used for diagnosing airway conditions.
• Tracheal ultrasound (US) presents unique challenges, including imaging artifacts that can be misidentified as pathology.
• Tracheal mirror image artifacts (TMIAs) are a specific type of artifact encountered in US.

Purpose of the Study:

• To explain the mechanism behind tracheal mirror image artifacts (TMIAs).
• To highlight the prevalence of TMIAs in patients undergoing tracheal ultrasound.
• To emphasize the importance of recognizing TMIAs for accurate airway diagnosis.

Main Methods:

• Review of a cohort of patients undergoing tracheal ultrasound.
• Analysis of ultrasound images to identify and characterize tracheal mirror image artifacts.
• Correlation of artifact presence with tracheal anatomy (normal vs. pathologic).

Main Results:

• Tracheal mirror image artifacts (TMIAs) were observed in all patients studied.
• The air column within the trachea, rather than the cartilage convexity, was identified as the cause of TMIAs.
• TMIAs were present in both normal and pathologically altered tracheas.

Conclusions:

• Tracheal mirror image artifacts (TMIAs) are a common finding in tracheal ultrasound.
• Understanding that the tracheal air column causes TMIAs is crucial for correct interpretation.
• Recognition of TMIAs is essential as airway ultrasonography becomes more widespread in clinical practice.