Thallium stress tests utilize thallium-201, with a physical half-life of about three days. This means that the activity or emissions from a vial of thallium-201 will decrease by half every three days. Thus, after three days, the activity will be one-half of the initial activity. After six days it will be about one-fourth of the initial activity, and so forth. It could take up to about 30 days for the activity in this vial to decrease to levels that are no longer measurable above natural background radiation levels.
In addition, when thallium-201 is injected into the blood during a stress test, the thallium rapidly leaves the blood by uptake in the cells of all organs and tissues in the body. Over time, the thallium eventually is excreted by way of the gastrointestinal tract 80% and through the urine 20%. The International Commission on Radiological Protection notes that 63% of injected thallium chemical will leave the body with a biological-half life, which is how long it takes for half of the amount of a chemical to clear from the body, of seven days. The remaining 37% will leave the body with a much longer biological half-life of 28 days. Therefore, thallium chemical will clear from the body with about a 10-day overall biological half-life.
The sensitivity of alarms may vary from one installation to another and ratings continue to increase due to increased risk. After a Thallium Stress test, with the alarm sensitivity rating at the White House, an individual continued to set of the alarm for 30 days Your high security building may have the same rating. It can/will remain in your system for about 71 days.
The Content on this Site is presented in a summary fashion, and is intended to be used for educational and entertainment purposes only. It is not intended to be and should not be interpreted as medical advice or a diagnosis of any health or fitness problem, condition or disease; or a recommendation for a specific test, doctor, care provider, procedure, treatment plan, product, or course of action. Med Help International, Inc. is not a medical or healthcare provider and your use of this Site does not create a doctor / patient relationship. We disclaim all responsibility for the professional qualifications and licensing of, and services provided by, any physician or other health providers posting on or otherwise referred to on this Site and/or any Third Party Site. Never disregard the medical advice of your physician or health professional, or delay in seeking such advice, because of something you read on this Site. We offer this Site AS IS and without any warranties. By using this Site you agree to the following Terms and Conditions. If you think you may have a medical emergency, call your physician or 911 immediately.