Are 1 .5 mm Suremark markers that are lead okay to use in CT SCAN as well or will they cause artifacts?

Typically markers that contain metal, such as this unit, can cause artifact in CT applications. We do offer various non-metallic ball markers that may work better. We also offer CT specific markers. We are happy to send you some samples of these. We will send you a separate email to better determine your needs. Thank you!