scholarly journals Assessment of the absorbed dose to organs from bone mineral density scan by using TLDS and the Monte Carlo method

2014 ◽  
Vol 29 (4) ◽  
pp. 289-295 ◽  
Author(s):  
Alireza Karimian ◽  
Atefeh Hajarizadeh
Keyword(s):  
Bone Mineral Density ◽  
Monte Carlo ◽  
Monte Carlo Method ◽  
Bone Mineral ◽  
Absorbed Dose ◽  
Mineral Density ◽  
Left Femur ◽  
X Ray ◽  
Femur Bone ◽  
The Monte Carlo Method

Nowadays, dual energy X-ray absorptiometry is used in bone mineral density systems to assess the amount of osteoporosis. The purpose of this research is to evaluate patient organ doses from dual X-ray absorptiometry by thermoluminescence dosimeters chips and Monte Carlo method. To achieve this goal, in the first step, the surface dose of the cervix, kidney, abdomen region, and thyroid were measured by using TLD-GR 200 at various organ locations. Then, to evaluate the absorbed dose by simulation, the BMD system, patient's body, X-ray source and radiosensitive tissues were simulated by the Monte Carlo method. The results showed, for the spine (left femur) bone mineral density scan by using thermoluminescence dosimeters, the absorbed doses of the cervix and kidney were 4.5 (5.64) and 162.17 (3.99)(mGy), respectively. For spine (left femur) bone mineral density scan in simulation, the absorbed doses of the cervix and kidney were 4.19 (5.88) and 175 (3.68)(mGy), respectively. The data obtained showed that the absorbed dose of the kidney in the spine scan is noticeable. Furthermore, because of the small relative difference between the simulation and experimental results, the radiation absorbed dose may be assessed by simulation and software, especially for internal organs, and at different depths of otherwise inaccessible organs which is not possible in experiments.

scholarly journals Evaluation of relationship between bone mineral density and fragility fracture in perimenopausal women between 40-58 years of age: a hospital based prospective observational study

2019 ◽  
Vol 5 (4) ◽  
pp. 605
Author(s):  
Arvind Kumar ◽  
Mozammil Pheroz ◽  
Rajesh K. Chopra ◽  
Benthungo Tungoe ◽  
Narendra Kumar ◽  
...  
Keyword(s):  
Bone Mineral Density ◽  
Risk Assessment ◽  
Bone Mineral ◽  
Fragility Fracture ◽  
Mineral Density ◽  
Left Femur ◽  
X Ray ◽  
Total Hip ◽  
Perimenopausal Women ◽  
Bony Injury

<p class="abstract"><strong>Background:</strong> At present the risk assessment for osteoporosis using low bone mineral density (BMD) is based on data obtained from elderly females, largely ≥ 65 years of age. The risk factors for low peak bone mass or accelerated bone loss that occurs during perimenopausal phase is ignored in this risk assessment. Osteoporosis is found to occur at a relatively younger age in the Indian population. Although lower BMD values have an established identity as a major risk factor for fractures in postmenopausal women, we endeavour to evaluate relationship between bone mineral density and fragility fracture in perimenopausal women.</p><p class="abstract"><strong>Methods:</strong> 65 Patients were recruited for the study. After X-ray of involved part, patients were divided into cases (with fracture, n=33) and control (no bony injury, n=32). All patients underwent dual energy X-ray absorptiometry (DEXA) scan. Results of DEXA scans were evaluated in both the groups. BMD was expressed in g/cm<sup>2</sup>.<strong></strong></p><p class="abstract"><strong>Results:</strong> 33 patients (50.77%) were diagnosed as fracture, 32(49.23%) had no bony injury. Threshold bone mineral density (BMD) for fragility fracture found out asfor L1, cut off ≤0.767. For L2, cut off ≤0.829. For L3, cut off ≤0.811. L4, cut off ≤0.798. For L1-L4, cut off ≤0.845. For left femur total hip, cut off ≤0.918. For left forearm-total, cut off ≤0.411. For right femur total hip-cut off ≤0.795. For right forearm-total, cut-off≤0.382.</p><p class="abstract"><strong>Conclusions:</strong> Perimenopausal women having BMD below threshold for involved site are at risk of fragility fracture and should be given prophylactic treatment to improve bone mineral density.</p>

A reliable method for measuring proximal tibia and distal femur bone mineral density using dual-energy X-ray absorptiometry

2014 ◽  
Vol 36 (3) ◽  
pp. 387-390 ◽  
Author(s):  
Arjan J.T. Bakkum ◽  
Thomas W.J. Janssen ◽  
Marijn P. Rolf ◽  
Jan C. Roos ◽  
Jos Burcksen ◽  
...  
Keyword(s):  
Bone Mineral Density ◽  
Bone Mineral ◽  
Reliable Method ◽  
Distal Femur ◽  
Proximal Tibia ◽  
Dual Energy ◽  
Mineral Density ◽  
X Ray ◽  
Femur Bone

scholarly journals Do we need to perform bilateral hip bone mineral density examination?

2018 ◽  
Vol 8 (2) ◽  
Author(s):  
Annisa Layalia Widjanarko
Keyword(s):  
Bone Mineral Density ◽  
General Hospital ◽  
Bone Mineral ◽  
Dual Energy ◽  
World Health ◽  
Mineral Density ◽  
Left Femur ◽  
X Ray ◽  
Bone Status ◽  
Bmd Testing

Background: Bone mineral density (BMD) measurement is one of the method for making osteoporosis diagnosis. World Health Organization (WHO) recommends the measurement of BMD conducted at antero-posterior lumbar vertebrae, unilateral hip (femur), and radius. However, there was a concern about osteoporosis under diagnosis if the measurement is only conducted at unilateral hip. Some studies found significant differences of BMD between both femur and evidence of the importance to examine both femur in making the diagnosis of osteoporosis. This study aims to determine anydifference between right and left femur BMD measurement and to investigate the bone status result with measurement of BMD of bilateral femur in Hasan Sadikin General Hospital. Methods: A retrospective study was conducted from June to November 2015. Patients who received dual-femur BMD testing using General Electrics (GE) Lunar Prodigy dual-energy x-ray absorptiometry at the DXA Facility in Hasan Sadikin General Hospital,Bandung between January 1, 2006 to December 31, 2014 were included. Statistical analysis performed to assess the difference and the correlation between theBMD of two femurs (g/cm2). T-scores of the subject were implemented into bone status according to WHO Diagnostic Criteria for Osteoporosis.Results: From sixty-one patients included in this study, there were difference bone status resulted from BMD of the femoral neck, Ward’s triangle, trochanter, andtotal hip area between right and left femur, although no statistically significance were found. There was a positive correlation between BMD of right and left femurat all areas of femur. There were 16 subjects (26.1%) showed combination level of bone status (normal, osteopenia, or osteoporosis in one femur).Conclusion: BMD results in each area of the right and left femurs are different.Therefore, performing bilateral hip BMD examination as a routine measurement for makingdiagnosis of osteoporosis is important.Keywords: Bone Mineral Density, Dual-energy X-ray Absorptiometry, Femur, Osteoporosis

scholarly journals Association between Body Mass Index and Bone Mineral Density in Patients Referred for Dual-Energy X-Ray Absorptiometry Scan in INMAS, Sylhet

2021 ◽  
Vol 22 (2) ◽  
pp. 108-113
Author(s):  
Kamun Nahar ◽  
Mohammed Mehedi Al Zahid Bhuiyan ◽  
Muhammad Sirazul Munir ◽  
Habibur Rahman
Keyword(s):  
Bone Mineral Density ◽  
Lumbar Spine ◽  
Bone Mineral ◽  
Dual Energy ◽  
Age Group ◽  
Mineral Density ◽  
Left Femur ◽  
X Ray ◽  
T Score ◽  
Pearson's Correlation

With an aging population, osteoporosis is increasingly becoming a public health concern. Bangladesh has a high incidence of osteoporosis and occurs among a relatively younger age group than in the developed world. There are several factors that could be associated with bone mineral density (BMD). We are keen to determine the association with BMD and BMI. The study was carried out on 152 patients who were referred to INMAS for dual energy X- ray absorptiometry (DEXA) measurement of bone mineral density (BMD) during the periods of January 2018 to July 2019. BMD was measured at right femoral neck and lumbar spines. Data about age and sex, BMI were recorded. Reporting was done according to the T score following WHO criteria. Prevalence were compared using chi-squared tests. Among 152 patients, 84.9% were females and 15.1% were males. Results showed for right femur that normal bone density in 91 (59.1%), osteopenia in 54 (35.1%), osteoporosis in 9 (5.8%) and BMD in spine was normal in 57 (37.0%) osteopenia in 44 (28.6%), osteoporosis in 53 (34.4%). About 60% of the study population was normal weight and others were underweighted or overweighed. Status of BMD was associated with BMI in the lumbar spine and femur. In this study group, total 61.2% and 26.3%were found low BMD in spine and right femur respectively. In age group ≥ 60 years, low BMD in spinewas 72.0% that is 42.29% higher compare to below 60 years’ group (50.6%).Correlation of BMI with lumbar spine T score, right femur and left femur T score were measured by Pearson’s correlation coefficient test. Positive significant Pearson’s correlation was observedbetween BMI with spine T score (r = 0.397; p = <0.001), BMI with right femur T score (r = 0.347; p = <0.001) and BMI with left femur T score (r = 0.382; p = <0.001). Bangladesh J. Nuclear Med. 22(2): 108-113, Jul 2019

A Long Femur Scan Field Does Not Alter Proximal Femur Bone Mineral Density Measurements by Dual-Energy X-Ray Absorptiometry

2011 ◽  
Vol 14 (3) ◽  
pp. 354-358 ◽  
Author(s):  
Fergus Eoin McKiernan ◽  
Jane Hocking ◽  
Susan Cournoyer ◽  
Richard L. Berg ◽  
James Linneman
Keyword(s):  
Bone Mineral Density ◽  
Bone Mineral ◽  
Proximal Femur ◽  
Dual Energy ◽  
Mineral Density ◽  
Density Measurements ◽  
X Ray ◽  
Femur Bone
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