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https://www.readbyqxmd.com/read/28502885/contra-lateral-bone-loss-at-the-distal-radius-in-postmenopausal-women-after-a-distal-radius-fracture-a-two-year-follow-up-hrpqct-study
#1
Joost J A de Jong, Jacobus J C Arts, Paul C Willems, Sandrine P G Bours, Judith P A Bons, Paul P C A Menheere, Bert van Rietbergen, Piet P Geusens, Joop P W van den Bergh
Opposite to the fracture side, bone mineral density (BMD) measured by DXA at the contra-lateral side does not change after a distal radius fracture. However, it is unknown if also bone micro-architecture and strength at the contralateral side are unaffected. Therefore, the aim of this study was to assess BMD, micro-architecture and bone mechanical properties at the contra-lateral side during two years follow-up after a distal radius fracture using high resolution peripheral quantitative computed tomography (HRpQCT)...
May 11, 2017: Bone
https://www.readbyqxmd.com/read/28487552/newborn-insula-gray-matter-volume-is-prospectively-associated-with-early-life-adiposity-gain
#2
J M Rasmussen, S Entringer, F Kruggel, D M Cooper, M Styner, J H Gilmore, S G Potkin, P D Wadhwa, C Buss
BACKGROUNDThe importance of energy homeostasis brain circuitry in the context of obesity is well established, however, the developmental ontogeny of this circuitry in humans is currently unknown. Here, we investigate the prospective association between newborn gray matter (GM) volume in the insula, a key brain region underlying energy homeostasis, and change in percent body fat accrual over the first six months of postnatal life, an outcome that represents among the most reliable infant predictors of childhood obesity risk...
May 10, 2017: International Journal of Obesity: Journal of the International Association for the Study of Obesity
https://www.readbyqxmd.com/read/28486441/bone-mineral-density-in-patients-with-inherited-bone-marrow-failure-syndromes
#3
Roopa Kanakatti Shankar, Neelam Giri, Maya B Lodish, Ninet Sinaii, James C Reynolds, Sharon A Savage, Constantine A Stratakis, Blanche P Alter
BACKGROUNDPatients with inherited bone marrow failure syndromes (IBMFS) may have several risk factors for low bone mineral density (BMD). We aimed to evaluate the prevalence of low BMD in IBMFS and determine associated risk factors.METHODSPatients with IBMFS with at least one Dual Energy X-ray absorptiometry (DXA) scan were evaluated. Diagnosis of each IBMFS, Fanconi anemia (FA), dyskeratosis congenita, Diamond-Blackfan anemia, and Shwachman-Diamond syndrome, was confirmed by syndrome-specific tests. Data were gathered on age, height and clinical history...
May 9, 2017: Pediatric Research
https://www.readbyqxmd.com/read/28486005/reference-values-for-assessment-of-unilateral-limb-lymphedema-with-dual-energy-x-ray-absorptiometry
#4
Caroline A Gjorup, Helle W Hendel, Tobias W Klausen, Bo Zerahn, Lisbet R Hölmich
INTRODUCTION: The clinical assessment of unilateral limb lymphedema is commonly based on measurements of interlimb volume differences. Reference values for interlimb percentage differences of the volume, fat mass, and lean mass measured with dual-energy X-ray absorptiometry (DXA) scan are, however, not established. The aim of the study was to establish and categorize these reference values in normal limbs. METHODS AND RESULTS: DXA scans of the normal arms of 167 and normal legs of 196 melanoma patients (aged 18-75 years, body mass index <40), respectively, were performed...
May 9, 2017: Lymphatic Research and Biology
https://www.readbyqxmd.com/read/28476576/non-bmd-dxa-measurements-of-the-hip
#5
Clinten P Edmondson, Elliott N Schwartz
Hip fracture is one of the most serious complications of osteoporosis. More than 50% of hip and other fractures occur in patients without densitometric osteoporosis. Therefore, areal bone mineral density (aBMD) may not be the best way to assess fracture risk. In order to improve assessment of fracture risk, many other approaches have been taken. At the present time, the Fracture Risk Algorithm (FRAX©) is one of the most notable ways to improve assessment of fracture risk. However, since early in the initiation of the dual energy x-ray absorptiometry (DXA) era, several non-BMD DXA approaches to the assessment of hip fracture risk have been proposed...
May 2, 2017: Bone
https://www.readbyqxmd.com/read/28474785/protein-timing-during-the-day-and-its-relevance-for-muscle-strength-and-lean-mass
#6
Samuel L Buckner, Jeremy P Loenneke, Paul D Loprinzi
Protein consumption and its association with changes in body composition, muscle function and different strategies to optimize the muscle protein synthetic response have received considerable attention. However, we are not aware of any epidemiological study examining the time-of-day consumption (afternoon versus evening) of protein on strength and lean mass. The purpose was to examine the associations between afternoon and evening protein consumption, at different protein thresholds (i.e. 15, 20, 25 and 30 g), in relation to leg lean mass and knee extensor strength in men...
May 5, 2017: Clinical Physiology and Functional Imaging
https://www.readbyqxmd.com/read/28473075/acr-appropriateness-criteria-%C3%A2-osteoporosis%C3%A2-and%C3%A2-bone-mineral-density
#7
Robert J Ward, Catherine C Roberts, Jenny T Bencardino, Erin Arnold, Steven J Baccei, R Carter Cassidy, Eric Y Chang, Michael G Fox, Bennett S Greenspan, Soterios Gyftopoulos, Mary G Hochman, Douglas N Mintz, Joel S Newman, Charles Reitman, Zehava S Rosenberg, Nehal A Shah, Kirstin M Small, Barbara N Weissman
Osteoporosis is a considerable public health risk, with 50% of women and 20% of men >50 years of age experiencing fracture, with mortality rates of 20% within the first year. Dual x-ray absorptiometry (DXA) is the primary diagnostic modality by which to screen women >65 years of age and men >70 years of age for osteoporosis. In postmenopausal women <65 years of age with additional risk factors for fracture, DXA is recommended. Some patients with bone mineral density above the threshold for treatment may qualify for treatment on the basis of vertebral body fractures detected through a vertebral fracture assessment scan, a lateral spine equivalent generated from a commercial DXA machine...
May 2017: Journal of the American College of Radiology: JACR
https://www.readbyqxmd.com/read/28467663/screening-for-atypical-femur-fractures-using-extended-femur-scans-by-dxa
#8
Denise M van de Laarschot, Alexandra A A Smits, Sanne K C Buitendijk, Merel T Stegenga, M Carola Zillikens
Atypical femur fractures (AFFs) are a rare but serious complication associated with the use of antiresorptive drugs such as bisphosphonates. Assessment of incomplete AFFs on extended femur scans by Dual X-ray Absorptiometry (DXA) may prevent the development of complete fractures. The aim of this study was to evaluate the potential of extended femur scans by DXA as a screening tool for incomplete AFFs. From June 2014 until September 2016 extended femur scans were routinely performed in all consecutive patients undergoing DXA scanning who had used bisphosphonates or denosumab at any given moment in the previous year...
May 3, 2017: Journal of Bone and Mineral Research: the Official Journal of the American Society for Bone and Mineral Research
https://www.readbyqxmd.com/read/28462788/effect-of-hand-positioning-on-dxa-total-and-regional-bone-and-body-composition-parameters-precision-error-and-least-significant-change
#9
Shane Thurlow, Brian Oldroyd, Karen Hind
Dual-energy X-ray absorptiometry (DXA) body composition measurements are performed in both clinical and research settings for estimations of total and regional fat mass, lean tissue mass, and bone mineral content. Subject positioning influences precision and positioning instructions vary between manufacturers. The aim of the study was to determine the effect of hand position and scan mode on regional and total body bone and body composition parameters and determine protocol-specific body composition precision errors...
April 25, 2017: Journal of Clinical Densitometry
https://www.readbyqxmd.com/read/28459884/poor-sleep-quality-and-later-sleep-timing-are-risk-factors-for-osteopenia-and-sarcopenia-in-middle-aged-men-and-women-the-neo-study
#10
Eliane A Lucassen, Renée de Mutsert, Saskia le Cessie, Natasha M Appelman-Dijkstra, Frits R Rosendaal, Diana van Heemst, Martin den Heijer, Nienke R Biermasz
CONTEXT: Sleep deprivation has detrimental metabolic consequences. Osteopenia and sarcopenia usually occur together and increase risk of fractures and disease. Results from studies linking sleep parameters to osteopenia or sarcopenia are scarce and inconsistent. OBJECTIVE: To examine the associations of sleep parameters with osteopenia and sarcopenia, considering the influence of sex and menopause. DESIGN, SETTING AND PARTICIPANTS: Cross-sectional analysis of 915 participants (45-65 years, 56% women, BMI 26 (range: 18-56) kg/m2) in the Netherlands Epidemiology of Obesity (NEO) study, a population-based cohort study...
2017: PloS One
https://www.readbyqxmd.com/read/28447585/metabolic-profiles-of-individuals-switched-to-second-line-antiretroviral-therapy-after-failing-standard-first-line-therapy-for-treatment-of-hiv-1-infection-in-a-randomized-controlled-trial
#11
Amanda H Yao, Cecilia L Moore, Poh Lian Lim, Jean-Michel Molina, Juan Sierra Madero, Stephen Kerr, Paddy Wg Mallon, Sean Emery, David A Cooper, Mark A Boyd
BACKGROUND: To investigate metabolic changes associated with second-line antiretroviral therapy (ART) following virological failure of first-line ART. METHODS: SECOND-LINE was an open-label randomized controlled trial. Participants were randomized 1:1 to receive ritonavir-boosted lopinavir (LPV/r) with 2-3 nucleoside/nucleotide reverse transcriptase inhibitors (N(t)RTI-group) or raltegravir (RAL-group) Two hundred and ten participants had a dual energy X-ray absorptiometry (DXA)-scan at baseline, week 48 and 96...
April 27, 2017: Antiviral Therapy
https://www.readbyqxmd.com/read/28445225/physical-fitness-and-body-composition-in-8-10-year-old-danish-children-are-associated-with-sports-club-participation
#12
Malte N Larsen, Claus M Nielsen, Christina Ørntoft, Morten B R Thomsen, Vibeke Manniche, Lone Hansen, Peter R Hansen, Jens Bangsbo, Peter Krustrup
We investigated whether physical fitness and body composition in 8[FIGURE DASH]10-year-old Danish children are associated with sports club participation. The study included 423 schoolchildren, comprising 209 girls and 214 boys, of whom 67 and 74%, respectively, were active in sports clubs. Yo-Yo Intermittent Recovery level 1 for Children (YYIR1C), balance, jump and coordination tests, together with DXA scans, were used to determine exercise capacity and body composition. Children active in sports clubs had better (P<0...
May 9, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28433734/prospective-association-of-fetal-liver-blood-flow-at-30-weeks-gestation-with-newborn-adiposity
#13
Satoru Ikenoue, Feizal Waffarn, Masanao Ohashi, Kaeko Sumiyoshi, Chigusa Ikenoue, Claudia Buss, Daniel L Gillen, Hyagriv N Simhan, Sonja Entringer, Pathik D Wadhwa
BACKGROUND: The production of variation in adipose tissue accretion represents a key fetal adaptation to energy substrate availability during gestation. Because umbilical venous blood transports nutrient substrate from the maternal to the fetal compartment and because the fetal liver is the primary organ in which nutrient interconversion occurs, it has been proposed that variations in the relative distribution of umbilical venous blood flow shunting either through ductus venosus or perfusing the fetal liver represents a mechanism underlying this adaptation...
April 20, 2017: American Journal of Obstetrics and Gynecology
https://www.readbyqxmd.com/read/28428829/semivariogram-analysis-of-bone-images-implemented-on-fpga-architectures
#14
Mukul Shirvaikar, Yamuna Lagadapati, Xuanliang Dong
Osteoporotic fractures are a major concern for the healthcare of elderly and female populations. Early diagnosis of patients with a high risk of osteoporotic fractures can be enhanced by introducing second-order statistical analysis of bone image data using techniques such as variogram analysis. Such analysis is computationally intensive thereby creating an impediment for introduction into imaging machines found in common clinical settings. This paper investigates the fast implementation of the semivariogram algorithm, which has been proven to be effective in modeling bone strength, and should be of interest to readers in the areas of computer-aided diagnosis and quantitative image analysis...
March 2017: J Real Time Image Process
https://www.readbyqxmd.com/read/28426779/reference-standards-for-lean-mass-measures-using-ge-dual-energy-x-ray-absorptiometry-in-caucasian-adults
#15
Mary T Imboden, Ann M Swartz, Holmes W Finch, Matthew P Harber, Leonard A Kaminsky
OBJECTIVE: To develop reference values by age and sex for LM measures using GE-Healthcare DXA systems. METHODS: A de-identified sample was obtained from Ball State University's Clinical Exercise Physiology Laboratory and University of Wisconsin-Milwaukee's Physical Activity & Health Research Laboratory. DXA scans of 2,076 women and 1,251 men were completed using a GE Lunar Prodigy or iDXA. Percentiles (%ile) were calculated for all variables of interest (LM, LMI, %LM, and ALMI) and a factorial ANOVA was used to assess differences for each variable between 10-year age groups and sex, as well as the interaction between age and sex...
2017: PloS One
https://www.readbyqxmd.com/read/28423041/modeling-the-shape-and-composition-of-the-human-body-using-dual-energy-x-ray-absorptiometry-images
#16
John A Shepherd, Bennett K Ng, Bo Fan, Ann V Schwartz, Peggy Cawthon, Steven R Cummings, Stephen Kritchevsky, Michael Nevitt, Adam Santanasto, Timothy F Cootes
There is growing evidence that body shape and regional body composition are strong indicators of metabolic health. The purpose of this study was to develop statistical models that accurately describe holistic body shape, thickness, and leanness. We hypothesized that there are unique body shape features that are predictive of mortality beyond standard clinical measures. We developed algorithms to process whole-body dual-energy X-ray absorptiometry (DXA) scans into body thickness and leanness images. We performed statistical appearance modeling (SAM) and principal component analysis (PCA) to efficiently encode the variance of body shape, leanness, and thickness across sample of 400 older Americans from the Health ABC study...
2017: PloS One
https://www.readbyqxmd.com/read/28419040/measurement-of-distal-ulnar-hounsfield-units-accurately-predicts-bone-mineral-density-of-the-forearm
#17
Scott C Wagner, Theodora C Dworak, Patrick D Grimm, George C Balazs, Scott M Tintle
BACKGROUND: Hounsfield unit (HU) measurement obtained from computed tomography (CT) scans of the wrist is a potential new screening method for low bone mineral density (BMD). We hypothesized that HU measurements of the ulnar head obtained from CT scans would correlate with BMD assessed with dual x-ray absorptiometry (DXA) scans of the forearm. METHODS: Patients with both upper-extremity CT and DXA scans performed at a single institution were included in the study...
April 19, 2017: Journal of Bone and Joint Surgery. American Volume
https://www.readbyqxmd.com/read/28389068/bone-mineral-density-measurements-around-osseointegrated-implants-a-precision-study-and-validation-of-scan-protocol-for-transfemoral-amputees
#18
Rehne Lessmann Hansen, Bente Lomholt Langdahl, Peter Holmberg Jørgensen, Klaus Kjær Petersen, Kjeld Søballe, Maiken Stilling
Visual evaluation of bone changes around an osseointegration (OI) implant in femoral amputees examined on plain radiographs shows that periprosthetic bone resorption takes place during the first years after OI surgery, but the bone mineral density (BMD) change has not been previously quantified by dual-energy X-ray absorptiometry (DXA). Precision is vital when monitoring BMD changes around implants, and thus the aim of this study was to evaluate the precision and feasibility of a scan protocol for BMD measurements in proximity of OI implants...
April 4, 2017: Journal of Clinical Densitometry
https://www.readbyqxmd.com/read/28388669/reference-standards-for-body-fat-measures-using-ge-dual-energy-x-ray-absorptiometry-in-caucasian-adults
#19
Mary T Imboden, Whitney A Welch, Ann M Swartz, Alexander H K Montoye, Holmes W Finch, Matthew P Harber, Leonard A Kaminsky
BACKGROUND: Dual energy x-ray absorptiometry (DXA) is an established technique for the measurement of body composition. Reference values for these variables, particularly those related to fat mass, are necessary for interpretation and accurate classification of those at risk for obesity-related health complications and in need of lifestyle modifications (diet, physical activity, etc.). Currently, there are no reference values available for GE-Healthcare DXA systems and it is known that whole-body and regional fat mass measures differ by DXA manufacturer...
2017: PloS One
https://www.readbyqxmd.com/read/28374079/accuracy-of-bone-mineral-density-quantification-using-dual-layer-spectral-detector-ct-a-phantom-study
#20
Robbert W van Hamersvelt, Arnold M R Schilham, Klaus Engelke, Annemarie M den Harder, Bart de Keizer, Harald J Verhaar, Tim Leiner, Pim A de Jong, Martin J Willemink
OBJECTIVES: To investigate the accuracy of bone mineral density (BMD) quantification using dual-layer spectral detector CT (SDCT) at various scan protocols. METHODS: Two validated anthropomorphic phantoms containing inserts of 50-200 mg/cm(3) calcium hydroxyapatite (HA) were scanned using a 64-slice SDCT scanner at various acquisition protocols (120 and 140 kVp, and 50, 100 and 200 mAs). Regions of interest (ROIs) were placed in each insert and mean attenuation profiles at monochromatic energy levels (90-200 keV) were constructed...
April 3, 2017: European Radiology
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