What is a "hot spot" that appears in PET scans and CT scans?
My brother has been experiencing some strange problems and symptoms, and I have some questions.
My brother started having right shoulder pain about 9 weeks ago. His doctor has been treating him for a torn rotator cuff.
Last week, the doctor decided to do an MRI. After it was read by the radiologist, they immediately scheduled him for a CT scan of the shoulder and a PET scan. The tech told my brother to stay in the waiting area so the radiologist could speak with him. After a brief wait, the radiologist suggested performing a CT scan of the chest because there were some "hot spots" on the scans: a large one in the right shoulder, a smaller one in the left shoulder, a few on the 2nd rib on the left side, some in the lymph nodes and in the lungs. The radiologist kept asking if my brother was experiencing a cough, or shortness of breath, chest pains. My brother denied having any problems except for the severe pain in is shoulder.
Once all the scans were complete, my brother was instructed to return to his doctor's office. There, nothing was really said except they were scheduling appointments with a pulmonologist and an orthopaedic specialist.
My brother is 48 years old and the picture of health. We are confused and concerned, especially since so many possible things that could be causing the pain have been ruled out, ie, pneumonia, congestive heart failure, torn rotator cuff, infection, fracture, etc.
Can anyone here tell me exactly what is a "hot spot" that appears in PET scans and CT scans?
I am sorry but I do not have good news for you. I am giving you certain refernces to answer your question.
"PET images begin with an injection of FDG, an analog of glucose that is tagged to the radionuclide F18. Metabolically active organs or tumors consume sugar at high rates, and as the tagged sugar starts to decay, it emits positrons. These positrons then collide with electrons, giving off gamma rays, and a computer converts the gamma rays into images. These images indicate metabolic "hot spots," often indicating rapidly growing tumors (because cancerous cells generally consume more sugar/energy than other organs or tumors)."; http://www.petscaninfo.com/zportal/portals/pat/petct_basics/how_petct_works
"Positron emission tomography is a noninvasive imaging technique that creates three-dimensional images of the heart, brain and other organs of the body. PET scans are mostly used in diagnosing cancer, especially lung cancer, colon and rectal cancer, head and neck cancers and lymphoma. However, they can also be used for heart disease, dementia and seizures.A computer constructs a three-dimensional image. Malignancies light up as "hot spots" in the image. A typical scan takes about two hours, including preparation."; http://www.mayoclinic.org/pet/
Here is another link that gives you detailed information; http://www.mayoclinic.com/health/pet-scan/CA00052
Please go through them and let me know if you have any other query.
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.
We're in the process of updating our system during which our trackers and health tools will not be available. We are doing our best to finish this update quickly. They should become available by 6:00 p.m. PST