What is the difference between pet scans, mri, ct, and bone/gallium scans?

A lot. Sorry to be so vague. They are very different in what can be seen and what can be diagnosed. Not enough room to go through the details. The Internet has many resources for this information. Try this one: http://www.radiologyinfo.org/

Related Questions

I want to know what is the difference between pet scans, mri, ct, and bone/gallium scans?

2 groups. Mri and ct scans are typically looking at the anatomy of a patient, as well as differences in blood flow if contrast is administered. Pet, bone and gallium scans are all looking at the function, or physiology of the patient, and the anatomy is of secondary concern. For example, pet scans are usually using f-18 fdg, a glucose analog, and display differences in glucose use, a main energy source. Read more...
Imaging tests. Ct uses radiation, like multiple x-rays. Mri uses magnets, and is very useful in characterizing soft tissue differences such as in the brain or joints, but also is more expensive and takes much more time. Pet is typically used for cancer imaging as it detects glucose usage by tissue (which is greater in tumors). Bone / gallium uses radiotracer.Best i can explain in 400 letters! Read more...

What are the differences between pet scans, mri, ct, and bone/gallium scans?

Precision. Ct is a great screening tool for imaging the organs. Mri images certain tissues more accurately. Pet uses radioactive material to light up specific tissues. Bone scans use activated agents that are taken up selectively by abnormal tissues. Each technique has it's benefits, risks, and degree of precision. Read more...
Many differences. Mri (magnetic resonance) does not utilize ionizing radiation(ir) characterize tissues, extent of tumor, infection, damage to cartilage/ligaments.Bone scan (ir) finds changes in bone reflecting tumors, fxs, infection( sensitive not specific) .Ct (ir) can localize traumatic changes, tumors, appendicitis, kidney disease.Pet/ct (ir) combo isotope /ct finds subtle metastases and recurrent malignancy, . Read more...
Anatomy vs Physiolog. Mri and ct scans are typically looking at the anatomy of a patient, as well as differences in blood flow if contrast is administered. Pet, bone and gallium scans are all looking at the function, or physiology of the patient, and the anatomy is of secondary concern. For example, pet scans are usually using f-18 fdg, a glucose analog, and display differences in glucose use, a main energy source. Read more...

How do pet scans, mri, ct, and bone/gallium scans differ?

Different mechanisms. Mri uses magnetic radiation( no x-ray) for anatomic localization and characterization of different parts of body, water and fat constitution of different tissues.Ct uses x-ray to characterize anatomy of body, better for bone than mr.Pet, bone, gallium scans use radio tracers intravenously.Petglucose metabolism of tumors, gallium (infection/tumor), bone scan for fxs, tumors, infection bone metabolism. Read more...