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A Dual Energy X-ray Absorptiometry (DEXA) machine obtained
through the NIH-NCRR-Shared Instrumentation Grant Project is housed in
the General Clinical Research Center (GCRC) Body Composition Core
Laboratory in the Liu Research Center (RB3) and is governed by the LA
BioMed DEXA Internal Advisory Committee.
The Hologic DELPHI-A (QDR
Series) with Magneto optical disk storage can acquire and analyze scans
of the whole body,
AP lumbar
spine, supine lateral spine, hip (single and dual)
and forearm. A whole body scan is acquired in about
3 minutes and a fast scan of the AP lumbar spine, single hip or forearm
can be acquired in about 30 seconds.
To assure the most accurate and reproducible body composition
results across all patients, a spine phantom and a T-bar step phantom are
measured regularly for calibration and quality control.
This DEXA instrument allows for regional and global
measurements of the whole body in adults and children (between the ages
of 4 and 12). The advanced
application for QDR Technology can directly measure total and regional
fat mass, lean mass, and skeletal mass, which is useful in research and
clinical studies. The QDR DEXA
technology also provides accurate and precise measurements of small
changes in bone mineral density (BMD) and bone mineral content
(BMC). The BMD measurement is the
most reliable means of recording the rate of bone loss or gain and
estimating a patient’s risk of fracture.
Recharge fees to use the
DEXA are set by the LA BioMed DEXA Internal Advisory Committee.
Usage of the DEXA requires the approval of the GCRC Advisory
Committee. PIs interested in applying to use the DEXA may fill out
a one-page application (form F-251-CD) available from the
Application/Forms section of the GCRC's web site at http://gcrc.labiomed.org. Interested
parties may also contact the GCRC directly via gcrcinfo@labiomed.org or by calling (310) 222-2503.
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