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By Sydney Lou Bonnick MD, FACP, Lori Ann Lewis MRT, CDT (auth.)
Carrying on with the superb acceptance of the 1st version, top densitometry specialists Sydney Lou Bonnick, MD, FACP, and Lori Ann Lewis, MRT, CDT, have up-to-date and multiplied Bone Densitometry for Technologists to mirror the newest criteria and advancements within the box. the following radiologic technologists, nurse practitioners, health care professional assistants, and devoted densitometry technologists can locate new instructions for bone density checking out, new cures for osteoporosis, and new remedy instructions for osteoporosis, in addition to new chapters on pediatric densitometry physique composition checks, and using skeletal morphometry in prognosis and fracture possibility prediction. The twelve appendices have additionally been up to date to mirror the most up-tp-date info to be had, together with contacts for densitometry gear brands and corporations, guidance for bone density checking out and CPT codes, definitions of phrases, and new conversion equations. A significant other CD includes the Precision Calculator better half for immediately calculating the temporary precision and least major swap values for a facility, and the statistical self assurance point for any swap in BMD, all of that are crucial within the interpretation of serial bone density reports. moreover, a brand new carrying on with schooling attempt will enable, upon winning finishing touch, 17 hours of type A American Society of Radiologic Technologists' credits.
complete and informative, Bone Densitometry for Technologists, moment variation offers all the useful wisdom had to expertly and professionally function any of cutting-edge refined densitometry machines.
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Extra resources for Bone Densitometry for Technologists
Sample text
Evaluated 53 subjects undergoing spine and proximal femur bone density measurements on the same day on the Lunar DPX and Hologic QDR-1000 (10). Like Pocock, Laskey found that the young-adult and age-matched comparisons to the reference database at the spine were similar. At the proximal femur, however, the differences were substantial. The magnitude of the differences approximated 1 standard deviation. This was a sufficient difference to potentially have profound clinical ramifications. Depending on which manufacturer's machine was used for the measurement, a patient could potentially be given a different diagnosis.
The small aluminumwedge, originally known as the Fel's wedge, is seen next to the index finger. exact settings varied slightly with the equipment used and were adjusted so that the background optical density of each of the two hand films matched a quality control film. An aluminum alloy reference wedge was placed on the film prior to exposure, parallel to the middle phalanx of the index finger. After development, the films were sent to a central laboratory where they were digitized and analyzed by computer.
The root-mean-square error in the calculation of the sBMD is estimated to be 4% for the PA spine and total femur and even larger for the proximal femur subregions (7). This error is simply too large to base important clinical decisions on the comparison of sBMD values obtained on different devices for an individual. 026] Adapted from the Journal of Bone and Mineral Research 1997;12:1316-1317 with permission from the American Society for Bone and Mineral Research. But, if nothing else, these formulas illustrate that the measured BMD at a given site cannot be directly compared to the measured BMD at that same site from another manufacturer's device.