Radiation Safety


ALARA - As Low As Reasonably Achievable3

The use of radiation for beneficial purposes in medical procedures is a major contributor to improved human health. However, the benefits of this alternative treatment for liver cancer need to be balanced with the risks of radiation exposure.
ALARA is a radiation safety principle of keeping unnecessary radiation exposure and release of radioactive materials to the environment as low as can be achieved by employing all reasonable methods.1

ALARA is also a regulatory requirement for all radiation safety programs.

ALARA is based on the assumption that exposure to radiation of any dose increases the probability of detrimental biological effects such as genetic mutations and cancer.

ALARA can be achieved using three key factors:


1. Time

Reducing exposure time reduces radiation risk


Doubling the distance reduces radiation exposure four-fold


Shielding material absorbs radiation between the source and the individual

TheraSphere® dose vial and the Administration Accessory kit are designed with ALARA in mind to reduce radiation exposure to both healthcare professionals and patients to ‘As Low As Reasonably Achievable’ levels. Use our interactive radiation dose ordering calculator to calculate the appropriate TheraSphere® dose before continuing to the online ordering form.

Ready to Use Dose vial minimizes radiation exposure to staff with accuracy traceable to NIST standards. There is no risk of contamination from transfer of glass microspheres as the container is the administration vial.4,2

Quick and Easy Administration with an infusion time of less than five minutes, requiring no fluoroscopy or contrast during administration.4

Learn more about how TheraSphere® conforms to ALARA




  1. United States Regulatory Commission (U.S. NRC). Measuring Radiation. http://www.nrc.gov/about-nrc/radiation/health-effects/measuring-radiation.html. Updated Friday, June 28, 2013; accessed July 22, 2014.
  2. McGhee S, Data on file, July 18, 2014.
  3. Adapted from Brateman L, 1999. Brateman L. Radiation safety considerations for diagnostic radiology personnel. Radiographics. 1999 Jul-Aug;19(4):1037-55.
  4. Package Insert – TheraSphere® Yttrium-90 Glass Microspheres Rev.12

ALARA = As Low As Reasonably Achievable