Search results for "Densitometer"

showing 3 items of 3 documents

Assessment of maximal handgrip strength: How many attempts are needed?

2017

BACKGROUND: Handgrip strength (HGS) is used to identify individuals with low muscle strength (dynapenia). The influence of the number of attempts on maximal HGS is not yet known and may differ depending on age and health status. This study aimed to assess how many attempts of HGS are required to obtain maximal HGS.METHODS: Three cohorts (939 individuals) differing in age and health status were included. HGS was assessed three times and explored as continuous and dichotomous variable. Paired t-test, intraclass correlation coefficients (ICC) and Bland-Altman analysis were used to test reproducibility of HGS. The number of individuals with misclassified dynapenia at attempts 1 and 2 with respe…

AdultSarcopeniaAdolescentsex differenceHealth Statusadult; aged; aging; Article; cohort analysis; dual energy X ray absorptiometry; dynamometer; female; four minute walk test; geriatric assessment; grip strength; health status; human; major clinical study; male; middle aged; muscle strength; outpatient; priority journal; reproducibility; sarcopenia; sex difference; six minute walk test; walk test; walking speed; X ray bone densitometer; Aged; Geriatric assessment; Muscle strength; Reproducibility of Results; Sarcopeniahealth statuswalking speedArticlesarcopeniaCohort StudiesYoung Adultmalesix minute walk testmiddle aged80 and overHumansfour minute walk testhumanMuscle StrengthreproducibilityGeriatric AssessmentX ray bone densitometerAgedAged 80 and overdual energy X ray absorptiometryHand StrengthMuscle strengthadultwalk testagingAge FactorsReproducibility of ResultsOriginal ArticlesdynamometerMiddle Agedcohort analysismajor clinical studyGeriatric assessmentfemaleCross-Sectional Studiespriority journalgrip strengthoutpatientOriginal Articlelihasvoima
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How to Determine Reliable Intensities Using Film Methods?

1997

The basis of a successful structure analysis is to obtain reliable intensities. In the field of electron crystallography intensity data can be collected on-line with a CCD-camera as well as off-line using image plates or film material. Whereas image plates are read out with a laser, film material is analysed via a densitometer or digitised using a CCD-camera or a scanner. Both, CCD-camera and scanner, uses CCDtechnology and we show that both systems can be used for intensity evaluation. In order to obtain reliable intensities from film media it is important to define and calibrate the experimental conditions, the digitization process and the evaluation of intensity data exactly. A high opti…

ScannerMaterials sciencebusiness.industryResolution (electron density)Process (computing)Laserlaw.inventionOpticslawRange (statistics)DensitometerbusinessIntensity (heat transfer)Digitization
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Differences in estimates of change of bone accrual and body composition in children because of scan mode selection with the prodigy densitometer.

2004

Abstract Girls of age 10–13 yr with Tanner stage I–III maturation status ( n = 155) were measured using the Prodigy (GE Lunar) densitometer. Bone area (BA), bone mineral content (BMC), and bone mineral density (BMD) were assessed for the whole body, lumbar spine, and proximal femur using the Thin (T) and Standard (S) scan modes at years 1 and 3 of the study. The differences obtained between the T and S mode at year 1 were 1–2% for the lumbar spine and proximal femur and 5–11% for the whole body. For those girls whose default mode changed from T at year 1 to S mode at year 3, the estimated gain in BA, BMC, and BMD was 3.4%, 7.6%, and 3.1% respectively, lower than that obtained when scanning …

musculoskeletal diseasesBone accrualAdolescentEndocrinology Diabetes and MetabolismAbsorptiometry PhotonBone DensityMedicineHumansRadiology Nuclear Medicine and imagingOrthopedics and Sports MedicineDensitometerFemurChildBone mineralLumbar Vertebraebusiness.industryMode selectionAnatomyBone areamusculoskeletal systemIntervention studiesBody CompositionBone mineral contentFemaleNuclear medicinebusinessWhole bodyJournal of clinical densitometry : the official journal of the International Society for Clinical Densitometry
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