BONE DENSITY MAINE GUIDE

BONE DENSITY MAINE GUIDE




bone ndensitometry n- n ncorrect nanswer- nthe nart nand nscience nof nmeasuring nthe nbone
nmineral ncontent nand nbone nmineral ndensity nof nspecific nskeletal nsites nor nthe nentire
nbody


nbone nmeasurement nvalues n- n ncorrect nanswer- nused nto nassess nbone nstrength,
ndiagnose ndiseases nassociated nwith nlow nbone ndensity n(like nosteoporosis), nmonitor
nthe neffects nof ntherapy nfor nsuch ndiseases, nand npredict nrisk nof nfuture nfractures


ndual nx-ray nabsorptionmetry n(DXA) n- n ncorrect nanswer- nthe nmost nversatile
ntechnique nfor nbone ndensitometry


n-low nradiation ndose
-wide navailability n
-ease nof nuse
-short nscan ntime
-high-resolution nimages n
-good nprecision
-stable ncalibration n- n ncorrect nanswer- nthe nDXA nscan nhas nthe nadvantages nof--

nsubtraction ntechnique n- n ncorrect nanswer- nthe ndifferences nbw nDXA nand
nradiography nare nthat nDXA nuses na nwhat?


nphoton nenergies n- n ncorrect nanswer- ndual nx-ray nmeans nthat nto neliminate nthe
ncontributions nof nsoft ntissue nand nand nmeasure nthe nx-rat nattenuation nof nbone
nalone, nyou ndo nthis nby nscanning nat ntwo ndifferent nx-ray n__ n__

, ndiagnosis n- n ncorrect nanswer- nDXA nare nonly nused nfor nthe npurpose nof nconfirming
ncorrect npositioning nof nthe npt nand ncorrect nplacement nof nthe nregion nof ninterest, nit
nis nnot nused nfor?


nthree n- n ncorrect nanswer- nhow nmany nDXA nmanufacturers nare nin nthe nUS?


nlower n- n ncorrect nanswer- nthe neffective nradiation ndose nfor nDXA nis nconsiderably n__
nthan nfor nradiography


nosteoporosis n- n ncorrect nanswer- nan nundetected nand noverlooked ndisease nuntil nthe
n1920s nwhen nradiography nrevealed nthe ndetection nof ndecreased ndensity nin nbones


nradiographic nabsorpitiometry n- n ncorrect nanswer- ninvolved ntaking na nradiograph nof
nbone nwith na nknown nstandard nplaced nand noptically ncomparing nthe ndensities


nradiogammetry n- n ncorrect nanswer- nwas nintroduced nin nthe n1960s npartly nin
nresponse nto nthe nmeasurements nof nbone nloss nperformed nin nastronauts


ndecreases n- n ncorrect nanswer- nwith nradiogammetry, nit nwas nfound nthat nas nbone
nloss nprogresses, nthe nthickness nof nthe nouter nshell nof nthe nsmall ntubular nbones n___
nas nthe ninner ncavity nenlarges


nquantitive ncomputed ntomography n- n ncorrect nanswer- nadapted nin nthe nlate n1970s
nwith nthe nuse nof nspecialized nsoftware nand nreference nphantoms nwhich nallowed nfor
nquantitive nmeasurements nof nthe ncentral narea nof nthe nvertebral nbody nwhere nearly
nbone nloss noccurs


nsingle nphoton nabsorptiometry(SPA)/dual nphoton nabsorptiometry n(DPA) n- n ncorrect
nanswer- nintroduced nin nthe n70s nand n80s nand nis nbased non nthe nphysics nprinciple
nsimilar nto nDXA; nthis nrelies non na nwater nbath nto neliminate nthe neffects nof nsoft
ntissue


nDPA n- n ncorrect nanswer- nused nphotons nof n2 nenergies nand nwas nused nto nassess
ncites nin nthe ncentral nskeleton n(l-spine nand nprox nfemur)


ncollimated nscintillation ncounter n- n ncorrect nanswer- nwith nthe nDPA, nthe nintensity nof
nthe nattenuated nbeam nwas nmeasured nby na n______, nand nthe nbone nmineral nwas
nquantified


nthe nfirst ncommercial nDXA nscanner n- n ncorrect nanswer- nfirst nintroduced nin n1987
nand nused na nradioisotope nfor nits nsource nbefore nbeing nreplaced nby nan nx-ray ntube


n-smaller
-more nportable