Bone Densitometry
Terms
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- General term for the art and science of measuring the bone mineral density for diagnosis of Osteoporosis
- Bone Densitometry
- Is bone living tissue?
- yes
- What 2 categories is bone made up of?
-
Cortical
Cancellous or trabecullar - Cortical bone?
- outer portion or dense shell
- cancellous or trabecullar bone
- latticelike/spongy portion that provides strength
- Bone masses increases until what age?
- 30-35
- At what age does bone denisty start to decrease more pronouncely?
- 50
- Osteoporosis is a health threat for how many americans
- 25 million
- What are the causes of osteoporosis?
-
1. menopause
2. height of more than 5'6
3. diet low in calcium
4. inactivity
5. smoking
6. Caucasian or Asian - incorporates use of high and low x-ray energy range to account for maximal attenuation differences in bone and soft tissue
- Dual- energy x-ray absorptiometry
- Allows both trabecullar and cortical bone analysis. Cost and radiation dose is higher.
- Quantitative Computed Tomography
- Uses nonionizing technique to assess bone mineral density in peripheral site selections. The most common site is os calcis
- Quantitative Ultrasound
- What type of positioning for DXA imaging
- Spine and Hip