ITGSS Technical Associate Practice Test – Complete Exam Prep 2026

The statement that no known bioeffects have been identified is correct in the context of 3D and 4D ultrasound procedures. Current research indicates that these imaging technologies, which produce detailed views of fetal structures and organs through sound waves, do not show any proven harmful effects on fetal development or maternal health when used appropriately.

While it is recognized that ultrasound does involve energy transfer to the tissues, the levels typically employed in both 3D and 4D imaging have been shown not to produce significant adverse bioeffects. This understanding is critical, especially when considering the ALARA (As Low As Reasonably Achievable) principle, which is a guiding concept in medical imaging that emphasizes minimizing exposure to any risks while achieving necessary imaging results.

In this context, while the ASRA principle is relevant, it ensures that if ultrasound is used, it is done with care and for justified medical reasons. However, it does not imply inherent risks at the levels typically utilized for 3D and 4D ultrasound procedures, hence supporting the validity of the selected answer.