Common Artifacts and Their Causes

Ultrasound artifacts arise from predictable interactions between sound and tissue and recognizing them prevents misdiagnosis and reduces unnecessary follow up. Acoustic shadowing occurs behind calcified structures and stones and can obscure deeper anatomy while enhancement appears distal to fluid filled structures and can mimic low attenuation lesions. Reverberation and mirror image artifacts result from strong reflectors and from multiple reflections and may create spurious structures. Anisotropy affects tendon imaging when the beam is not perpendicular to fibers and can mimic tears. Understanding the physical cause of each artifact guides corrective maneuvers and improves diagnostic accuracy.

Practical Troubleshooting Strategies

Troubleshooting begins with simple adjustments such as changing probe angle to reduce anisotropy increasing or decreasing frequency to balance resolution and penetration and applying graded compression to displace bowel gas. Using alternative acoustic windows and patient positioning can reveal obscured anatomy and reduce shadowing. Adjusting time gain compensation and overall gain helps balance near and far field brightness and using harmonic imaging or spatial compounding can reduce speckle and improve contrast. For Doppler artifacts adjusting scale baseline and wall filter settings reduces noise and prevents misinterpretation. Systematic problem solving and documentation of successful strategies build team knowledge and reduce repeat imaging.

Quality Assurance and Training

Artifact reduction benefits from ongoing training and from periodic review of common error patterns in peer feedback sessions. Simulated cases and annotated image libraries that show artifacts and corrective steps accelerate learning for new technologists. Quality assurance programs that track repeat rates and that correlate repeats with artifact types identify equipment or technique issues that require remediation. Collaboration with vendors and with medical physics supports acceptance testing and optimization of system presets to minimize artifact while preserving diagnostic detail.