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MRI

MRI (magnetic resonance imaging) scans use radio waves and magnets to create detailed cross-sectional images of the inside of the body. The body tissue absorbs the energy given off by the radio waves, and then releases the energy, which is measured by a computer to create detailed images. MRI scans may take a little longer and are usually noisier than CT scans. The machine looks like a tube, in which you lie in, and makes a thumping noise while scanning.

MRI scans are considered to be the best technique for assessing the extent of osteosarcoma tumors in bone and in soft tissue. The images tend to be more detailed than the images given by CT scans. MRI scans are especially important when staging the tumor and preparing for surgery. With the MRI images, the physician can accurately determine the area of tissue needed to biopsy.

An MRI of the osteosarcoma site, including the entire involved bone and nearby joints, is recommended during the assessment of osteosarcoma and before surgery.