Certified Ophthalmic Technician Practice Test 2025 – Complete Exam Prep

In a typical B-scan examination, the main parameter that is adjusted is the sound intensity. This parameter is crucial because it influences the quality of the ultrasound images produced. The sound intensity directly affects the echogenicity of the structures being examined; higher intensity may enhance the penetration of sound waves into denser tissues, allowing for better visualization of internal structures.

Adjusting sound intensity also helps in managing the clarity of the images, as it can be optimized for different types of tissues, ensuring that the reflective properties of various structures are adequately captured. This is particularly important in ophthalmic ultrasound, where detailed imaging of the eye's internal anatomy is necessary for accurate diagnosis.

While frequency of ultrasound waves, patient position, and depth of field are also important aspects of B-scan examinations, they do not play as central a role in the adjustments made during the examination process as sound intensity does. Frequency affects resolution and penetration but is typically predetermined based on the type of probe used. Patient position can aid in comfort and accessibility but isn’t frequently adjusted once set. Depth of field pertains to the focus range but adjusting intensity is more impactful on image quality.