Which action would be most in keeping with the ALARA principle during a diagnostic ultrasound examination?

Which action would be most in keeping with the ALARA principle during a diagnostic ultrasound examination?

• A. Extend the sonogram beyond the intended scope of the exam requisition.
• B. Prolong the sonogram to make videos of the fetus for each family member.
• C. Complete the diagnostic scan in a timely fashion at the lowest output power that achieves a quality image.
• D. Allow multiple students to scan an obstetrical patient because the fetus is in a good position for imaging.

Answer: (C)

ALARA means keeping exposure as low as reasonably achievable. In diagnostic ultrasound, this means using the lowest acoustic output and the shortest scan time that still provides a diagnostic-quality image. The best action is to complete the scan efficiently at the lowest output power that achieves the required image quality, so the study answers the clinical question while minimizing fetal exposure. Choosing a longer or broader scan just to extend the exam, to create videos for family members, or to involve multiple students adds unnecessary exposure without improving diagnostic value. The focus is on obtaining the needed information safely and efficiently, not on extending the exam or increasing personnel involvement.

ALARA means keeping exposure as low as reasonably achievable. In diagnostic ultrasound, this means using the lowest acoustic output and the shortest scan time that still provides a diagnostic-quality image. The best action is to complete the scan efficiently at the lowest output power that achieves the required image quality, so the study answers the clinical question while minimizing fetal exposure.

Choosing a longer or broader scan just to extend the exam, to create videos for family members, or to involve multiple students adds unnecessary exposure without improving diagnostic value. The focus is on obtaining the needed information safely and efficiently, not on extending the exam or increasing personnel involvement.