Subject: What are the dangers re: use of THALLIUM in radiological testings?

Please help, I have read through the information in your archives 
regarding the subject of THALLIUM. Every piece of information I have 
encountered via library, encyclopedia and internet (Mad Scientist Network 
site included) services leads me to understand and believe that THALLIUM 
has absolutely no place being anywhere near the human body; however, I am 
scheduled to have a THALLIUM STRESS TEST performed in the near future to 
evaluate heart function (unexplained chest pains). All medical personnel 
involved in administering this test express complete surprise and 
disinterest (to the point of laughing at my concerns) when asked about the 
safety and presence of this Atomic Element in the human body during and 
after this test. I know the test as a TEST is safe, but what about the 
injection of the THALLIUM into the body? Is it carcinogenic, toxic, etc? 
Are there any long term effects? Thankyou SO much for your assistance and 
expertise in this matter! 

Re: What are the dangers re: use of THALLIUM in radiological testings?