15 May 2019 Breast ultrasound : Is based on high-frequency sound waves; Does not use radiation; Is not painful. Gel is applied to the breast. To eliminate any residual air; To allow the ultrasound device to slide smoothly and obtain good-quality images. This exam is performed by a radiologist and is one of the most common breast exams. This article was written with the support of physicians and other clinical professionals from the Hospital da Luz network. The content published in the Health Guide is intended for the general public and is provided for informational and educational purposes only. It does not replace individual medical assessment, diagnosis, or personalized clinical advice from a qualified healthcare professional. The content is produced or reviewed by physicians and other healthcare professionals at Hospital da Luz and is based on the knowledge available at the time of publication or the most recent update, as indicated at the beginning of each item.