Osteoporosis CT: Difference between revisions
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Quantitative computed tomography (QCT) scanning is an alternative to [[DEXA scan]] for measuring [[bone mineral density]]. It measures BMD as a true volume density in g/cm3, which is not influenced by bone size. It is used to measure bone mineral density of only the [[spine]]. | Quantitative computed tomography (QCT) scanning is an alternative to [[DEXA scan]] for measuring [[bone mineral density]]. It measures BMD as a true volume density in g/cm3, which is not influenced by bone size. It is used to measure bone mineral density of only the [[spine]]. | ||
==Computed | ==Computed Tomography Scanning== | ||
* It measures the [[bone mineral density]] of only the spine and thus aiding in diagnosing spine [[osteoporosis]]. | * It measures the [[bone mineral density]] of only the spine and thus aiding in diagnosing spine [[osteoporosis]]. | ||
* It is used in identifying fractures. | * It is used in identifying fractures. | ||
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* Expensive | * Expensive | ||
* Relatively poor reproducibility | * Relatively poor reproducibility | ||
* Presence of osteophytes can interfere with the imaging quality | * Presence of [[osteophytes]] can interfere with the imaging quality | ||
Quantitative [[CT]] scan is seldom used now. | Quantitative [[CT]] scan is seldom used now. | ||
Single-photon emission computed tomography (SPECT) scanning offers better image contrast and more accurate lesion localization. | Single-photon emission computed tomography (SPECT) scanning offers better image contrast and more accurate lesion localization. | ||
==References== | ==References== | ||
Revision as of 18:15, 27 August 2012
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Osteoporosis Microchapters |
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Diagnosis |
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Treatment |
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Medical Therapy |
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Case Studies |
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Osteoporosis CT On the Web |
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American Roentgen Ray Society Images of Osteoporosis CT |
Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]; Associate Editor(s)-In-Chief: Cafer Zorkun, M.D., Ph.D. [2], Raviteja Guddeti, M.B.B.S.[3]
Overview
Quantitative computed tomography (QCT) scanning is an alternative to DEXA scan for measuring bone mineral density. It measures BMD as a true volume density in g/cm3, which is not influenced by bone size. It is used to measure bone mineral density of only the spine.
Computed Tomography Scanning
- It measures the bone mineral density of only the spine and thus aiding in diagnosing spine osteoporosis.
- It is used in identifying fractures.
Advantages
- Measures true volume density.
- Highly sensitive than conventional x-ray
Disadvantages
- Requires higher radiation dose
- Expensive
- Relatively poor reproducibility
- Presence of osteophytes can interfere with the imaging quality
Quantitative CT scan is seldom used now.
Single-photon emission computed tomography (SPECT) scanning offers better image contrast and more accurate lesion localization.
References