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Quantitative Computed Tomography (QCT)
Quantitative Computed Tomography (QCT) is a fast, non-invasive bone mineral density exam (BMD), which utilizes Computed Tomography (CT or “CAT”) scanner technology. QCT detects low bone mass and monitors the effects of bone mass therapy in patients undergoing treatment.
During the exam, your spine and hip are scanned for diagnosis of low bone mass (osteopenia) or osteoporosis. QCT is the only 3-D bone density exam, meaning it isolates the metabolically-active soft (trabecular) bone in the spine for analysis, whereas other bone density exams combine both hard (cortical) and soft bone. Since soft bone is affected earlier and to a greater degree than hard bone, QCT is likely to detect low bone mass earlier than other bone mineral density exams.
Exam preparation
- Wear metal free clothing.
- A CDI representative will contact you prior to your appointment to provide specific instructions, and review health and insurance information.
- Please notify a member of CDI’s staff if you are nursing or if there is a chance you could be pregnant.
During the exam – what to expect
- You will be asked to lie fully clothed on a table.
- QCT uses x-rays; however, the amount of radiation required is less than a mammogram.
- BMD is measured at both the spine and hip since bone mineralization is not uniform throughout your body. Therefore, while some skeletal sites may be normal, others may be osteoporotic and prone to fractures.
- QCT exams are completed in approximately 15 minutes.
After the exam – what to expect
- A detailed report of your bone mineral density assessment will be sent directly to your physician with recommendations for the appropriate management.
- Your doctor will consider this information in context of your overall care, and talk with you about the results.
If you have additional questions about your appointment or our services, check out our Frequently Asked Questions or contact your local CDI center.
ADDITIONAL RESOURCES
National Osteoporosis Foundation (NOF)
tel 202.223.2226
www.nof.org
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