How to prepare for a ventilation perfusion scan? A V/Q scan takes approximately 20 to 30 minutes and consists of two parts. During the ventilation part, the patient will have a face mask placed over his or her mouth and nose and will be asked to inhale oxygen and a radioactive gas that has no …
Can shin splints be differentiated from stress fractures on a bone scan? Shin splints, or medial tibial stress syndrome, generally show linear increased radiotracer uptake primarily on the delayed bone scan images in the posteromedial tibial cortices. Stress fractures, however, are more focal with intense radiotracer uptake on delayed bone scan images and are often …
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What are the causes of liver radiotracer uptake on a bone scan? The most problematic cause of liver uptake on a bone scan is the presence of hepatic metastases, most likely due to melanoma or cancers of the colon, breast, or lung. Sometimes, there can be apparent increased radiotracer activity in the liver that is …
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Is increased radiotracer uptake in the kidneys a clinically relevant finding on a bone scan? If one or both kidneys have increased uptake on a bone scan, this finding can be clinically relevant because such a finding can occur in the setting of hydronephrosis and obstruction. Increased uptake on a bone scan may also be …
Which benign bone tumors have increased radiotracer uptake on a bone scan? Osteoid osteomas have increased radiotracer uptake on delayed bone scan images and may have an observable photopenic center. They commonly arise in the femur or spine. Uptake is also very intense in osteochondromas and chondroblastomas. Enchondromas do not typically have significantly increased radiotracer …
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What is the significance of a single rib lesion in a patient undergoing evaluation for metastatic disease from a known primary cancer? The traditional view is that a single rib lesion has approximately an 8% to 10% chance of being a metastasis; this can be modified by the characteristics of the finding. Typically, linear areas …
Which disorders result in Intense radiotracer uptake on a bone scan in multiple joints? Polyarticular radiotracer uptake on a bone scan is typically associated with arthritic conditions, such as osteoarthritis, rheumatoid arthritis, psoriatic arthritis, gout, or ankylosing spondylitis. The diagnosis of these different disorders can be suggested by the pattern of specific joints involved, such …
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