Rubidium-82 chloride

A radiopharmaceutical used in cardiac imaging

Rubidium-82 chloride is a radiopharmaceutical used in positron emission tomography (PET) imaging, particularly for assessing myocardial perfusion. It is a radioisotope of rubidium and is commonly used in the form of a generator system known as CardioGen-82.

Chemical properties

Rubidium-82 is a radioactive isotope of rubidium with a half-life of approximately 76 seconds. It decays by positron emission, which makes it suitable for PET imaging. The chloride form is used because it is soluble and can be easily administered intravenously.

Medical use

Rubidium-82 chloride is primarily used in cardiac imaging to evaluate coronary artery disease. It is injected into the bloodstream, where it mimics the behavior of potassium ions, allowing it to be taken up by myocardial tissue. This uptake is then imaged using PET to assess blood flow to the heart muscle.

CardioGen-82 generator

The CardioGen-82 generator is a device used to produce rubidium-82 chloride for clinical use. It contains a parent isotope, strontium-82, which decays to produce rubidium-82. The generator allows for the continuous production of rubidium-82, which is then eluted with a saline solution to produce the rubidium-82 chloride used in PET imaging.

Advantages and limitations

Rubidium-82 chloride offers several advantages in cardiac imaging, including rapid imaging times due to its short half-life and high-quality images due to the high energy of the emitted positrons. However, its short half-life also limits its use to facilities with an on-site generator, and the high cost of the generator system can be a barrier.

Safety and precautions

As with all radiopharmaceuticals, the use of rubidium-82 chloride requires careful handling to minimize radiation exposure to patients and healthcare workers. The short half-life of rubidium-82 helps reduce the overall radiation dose to the patient.

Related pages

• Positron emission tomography
• Myocardial perfusion imaging
• Radiopharmaceutical
• Coronary artery disease