Patient Jean Henderson is tested for hand steadiness as she undergoes high-frequency ultrasound brain surgery led by OHSU neurosurgeon Ahmed Raslan, M.D., and his team on Wednesday, March 30, 2022. (OHSU/Christine Torres Hicks)

OHSU neurosurgeon Ahmed Raslan, M.D., performs the high-frequency ultrasound surgery on patient Jean Henderson on Wednesday, March 30, 2022. (OHSU/Christine Torres Hicks)

OHSU neurosurgeons Ahmed Raslan, M.D., at left, and Maryam Shahin, M.D., collaborate during OHSU’s first case using high-frequency focused ultrasound to treat essential tremor on March 30, 2022. (OHSU/Christine Torres Hicks)

Patient Jean Henderson and her husband Larry celebrate after Jean's high-frequency ultrasound brain surgery led by OHSU neurosurgeon Ahmed Raslan and his team on Wednesday, March 30, 2022. (OHSU/Christine Torres Hicks)

OHSU neurosurgery staff celebrate with patient Jean Henderson and her husband, Larry. (OHSU/Christine Torres Hicks)

Patient Jean Henderson's hand stability was tested mid-surgery to ensure the treatment was proceding in the right direction. (OHSU/Christine Torres Hicks)

Patient Jean Henderson undergoes high-frequency ultrasound brain surgery led by OHSU neurosurgeon Ahmed Raslan, M.D., and his team on Wednesday, March 30, 2022. (OHSU/Christine Torres Hicks)

Patient Jean Henderson and her husband Larry celebrate after Jean's high-frequency ultrasound brain surgery led by OHSU neurosurgeon Ahmed Raslan and his team on Wednesday, March 30, 2022. Jean Henderson, holding her glass of sparkling cider very steadily for the first time in years. (OHSU/Christine Torres Hicks)

Larry Henderson and patient Jean Henderson wait in the lobby at OHSU's Center for Health and Healing just before Jean will undergo high-frequency ultrasound brain surgery led by OHSU neurosurgeon Ahmed Raslan, M.D., and his team on Wednesday, March 30, 2022. (OHSU/Christine Torres Hicks)