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Dual energy bone marrow

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https://www.readbyqxmd.com/read/28067882/skeletal-outcome-in-long-term-survivors-of-childhood-high-risk-neuroblastoma-treated-with-high-dose-therapy-and-autologous-stem-cell-rescue
#1
P Utriainen, A Vatanen, S Toiviainen-Salo, U Saarinen-Pihkala, O Mäkitie, K Jahnukainen
High-dose therapy and hematopoietic stem cell transplantation (HSCT) have been shown to improve survival rates in high-risk neuroblastoma (HR-NBL), but may cause adverse effects on the growing skeleton. We studied skeletal health in a national cohort of long-term survivors of HR-NBL (n=21; age 16-30 years, median 22 years) and in 20 healthy age- and sex-matched controls. In addition to clinical evaluation and measurement of bone mineral density (BMD) by dual-energy X-ray absorptiometry, we performed spinal magnetic resonance imaging...
January 9, 2017: Bone Marrow Transplantation
https://www.readbyqxmd.com/read/28065376/dual-energy-ct-virtual-non-calcium-technique-for-detection-of-bone-marrow-edema-in-patients-with-vertebral-fractures-a-prospective-feasibility-study-on-a-single-source-volume-ct-scanner
#2
T Diekhoff, K G Hermann, M Pumberger, B Hamm, M Putzier, M Fuchs
OBJECTIVES: Dual-energy computed tomography (DECT) is a recent development for detecting bone marrow edema (BME) in patients with vertebral compression fractures. The aim of this pilot study was to determine the reliability of single-source DECT in detecting vertebral BME using magnetic resonance imaging (MRI) as standard of reference. MATERIALS AND METHODS: Nine patients with radiographic thoracic or lumbar vertebral compression fractures underwent both, DECT on a 320-row single-source scanner and 1...
February 2017: European Journal of Radiology
https://www.readbyqxmd.com/read/28046752/su-f-i-24-feasibility-of-magnetic-susceptibility-to-relative-electron-density-conversion-method-for-radiation-therapy
#3
K Ito, N Kadoya, M Chiba, K Sato, T Nagasaka, K Yamanaka, S Dobashi, K Takeda, H Matsushita, K Jingu
PURPOSE: The aim of this study is to develop radiation treatment planning using magnetic susceptibility obtained from quantitative susceptibility mapping (QSM) via MR imaging. This study demonstrates the feasibility of a method for generating a substitute for a CT image from an MRI. METHODS: The head of a healthy volunteer was scanned using a CT scanner and a 3.0 T MRI scanner. The CT imaging was performed with a slice thickness of 2.5 mm at 80 and 120 kV (dual-energy scan)...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28043896/marrow-adipose-tissue-composition-in-adults-with-morbid-obesity
#4
Elaine W Yu, Logan Greenblatt, Alireza Eajazi, Martin Torriani, Miriam A Bredella
Patients with type 2 diabetes mellitus (T2DM) have increased fracture risk despite normal or increased bone mineral density (BMD). Elevations in marrow adipose tissue (MAT) and declines in MAT unsaturation are both associated with increased skeletal fragility. The objective of our study was to characterize the quantity and composition of MAT in adults with morbid obesity and T2DM, and to evaluate determinants of MAT. We studied 21 adults with morbid obesity prior to bariatric surgery, 8 of whom had T2DM. All subjects underwent 1H-MR spectroscopy of the lumbar spine and femur for assessment of MAT and dual-energy x-ray absorptiometry (DXA) and quantitative computed tomography (QCT) of the lumbar spine and hip for assessment of areal BMD (aBMD) and volumetric BMD (vBMD)...
December 30, 2016: Bone
https://www.readbyqxmd.com/read/27992684/hip-shape-as-a-predictor-of-osteoarthritis-progression-in-a-prospective-population-cohort
#5
Harbeer G Ahedi, Richard M Aspden, Leigh C Blizzard, Fiona R Saunders, Flavia M Cicuttini, Dawn A Aitken, Graeme Jones, Jennifer S Gregory
OBJECTIVE: Hip morphology plays a significant role in the incidence and progression of hip osteoarthritis (OA). We hypothesized that hip shape would also associate with other key factors and tested this in a longitudinal community-based cohort combining radiographic, MRI, DXA, and clinical data. METHODS: Baseline dual-energy X-ray absorptiometry (DXA) images of the left hip of 831 subjects from the Tasmanian Older Adult Cohort (TASOAC) were analyzed using an 85-point statistical shape model...
December 19, 2016: Arthritis Care & Research
https://www.readbyqxmd.com/read/27942979/use-of-dual-energy-computed-tomography-to-measure-skeletal-wide-marrow-composition-and-cancellous-bone-mineral-density
#6
Luke Arentsen, Karen E Hansen, Masashi Yagi, Yutaka Takahashi, Ryan Shanley, Angela McArthur, Patrick Bolan, Taiki Magome, Douglas Yee, Jerry Froelich, Susanta K Hui
Temporal and spatial variations in bone marrow adipose tissue (MAT) can be indicative of several pathologies and confound current methods of assessing immediate changes in bone mineral remodeling. We present a novel dual-energy computed tomography (DECT) method to monitor MAT and marrow-corrected volumetric BMD (mcvBMD) throughout the body. Twenty-three cancellous skeletal sites in 20 adult female cadavers aged 40-80 years old were measured using DECT (80 and 140 kVp). vBMD was simultaneous recorded using QCT...
December 9, 2016: Journal of Bone and Mineral Metabolism
https://www.readbyqxmd.com/read/27933815/gold-nanoparticles-as-a-potential-cellular-probe-for-tracking-of-stem-cells-in-bone-regeneration-using-dual-energy-computed-tomography
#7
Daqian Wan, Dexin Chen, Kaicheng Li, Yang Qu, Kang Sun, Ke Tao, Kerong Dai, Songtao Ai
Transplant of bone marrow mesenchymal stem cells (BMSCs) has attracted considerable interest for bone regeneration. However, noninvasive and real-time tracking of location and concentration of the implanted BMSCs remains a big challenge. Herein we designed a novel approach involving the surface modification of gold nanoparticles (AuNPs) with silica layers and DNA Transfectin 3000 (TS) to improve biocompatibility and to enhance the uptake by BMSCs, hence rendering the ability of tracking BMSCs with dual-energy computer tomography (DECT)...
November 30, 2016: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/27931959/imaging-of-gout-new-tools-and-biomarkers
#8
REVIEW
Elizabeth G Araujo, Bernhard Manger, Fernando Perez-Ruiz, Ralf G Thiele
While joint aspiration and crystal identification by polarizing microscopy remain the gold standard for diagnosing tophaceous gout, agreement among medical and ancillary health personnel examining synovial fluid using polarizing microscopy for the detection of monosodium urate (MSU) crystals appears to be poor. Imaging modalities, including conventional radiography (CR), ultrasonography (US), magnetic resonance imaging (MRI), and dual-energy computed tomography (DECT), have been found to provide information on the deposition of MSU crystals in tissues, and the consequences of such deposition...
August 2016: Best Practice & Research. Clinical Rheumatology
https://www.readbyqxmd.com/read/27872954/osteitis-a-retrospective-feasibility-study-comparing-single-source-dual-energy-ct-to-mri-in-selected-patients-with-suspected-acute-gout
#9
Torsten Diekhoff, Michael Scheel, Sandra Hermann, Jürgen Mews, Bernd Hamm, Kay-Geert A Hermann
OBJECTIVE: Dual-energy computed tomography detects tophi in patients with chronic gout. However, other information that can be obtained from the same scan is not the focus of the current research, e.g., the detection of bone marrow edema (BME) using virtual bone marrow imaging (VBMI). The aim of this study was to evaluate if BME in patients with acute arthritis can be detected with VBMI using magnetic resonance imaging (MRI) as the standard of reference. MATERIALS AND METHODS: This retrospective study included 11 patients who underwent both MRI and dual-energy computed tomography (mean interval of 40 days)...
February 2017: Skeletal Radiology
https://www.readbyqxmd.com/read/27870622/dual-energy-ct-for-the-musculoskeletal-system
#10
Paul I Mallinson, Tyler M Coupal, Patrick D McLaughlin, Savvas Nicolaou, Peter L Munk, Hugue A Ouellette
The principal advantages of dual-energy computed tomography (CT) over conventional CT in the musculoskeletal setting relate to the additional information provided regarding tissue composition, artifact reduction, and image optimization. This article discusses the manifestations of these in clinical practice-urate and bone marrow edema detection, metal artifact reduction, and tendon analysis, with potential in arthrography, bone densitometry, and metastases surveillance. The basic principles of dual-energy CT physics and scanner design will also be discussed...
December 2016: Radiology
https://www.readbyqxmd.com/read/27707768/marrow-adipose-tissue-spectrum-in-obesity-and-type-2-diabetes-mellitus
#11
Iana M de Araújo, Carlos E G Salmon, Andressa K Nahas, Marcello H Nogueira-Barbosa, Jorge Elias, Francisco J A de Paula
OBJECTIVE: To assess the association of bone mass and marrow adipose tissue (MAT) with other fat depots, insulin resistance, bone remodeling markers, adipokines and glucose control in type 2 diabetes and obesity. DESIGN AND METHODS: The study groups comprised 24 controls (C), 26 obese (O) and 28 type 2 diabetes. Dual-energy X-ray absorptiometry was used to determine bone mineral density (BMD). Blood samples were collected for biochemical measurements. (1)H Magnetic resonance spectroscopy was used to assess MAT in the L3 vertebra, and abdominal magnetic resonance imaging was used to assess intrahepatic lipids in visceral (VAT) and subcutaneous adipose tissue...
January 2017: European Journal of Endocrinology
https://www.readbyqxmd.com/read/27695483/effect-of-a-local-one-time-low-dose-injection-of-zoledronic-acid-on-titanium-implant-osseointegration-in-ovariectomized-rats
#12
Gao Ying, Lian Bo, Jiao Yanjun, Wu Lina, Wang Binquan
INTRODUCTION: Local application of bisphosphonates has been proven to be safer than systemic administration to promote implant fixation. The objective of this study was to introduce such a simple, convenient and efficient method to enhance titanium (Ti) implant osseointegration in ovariectomized (OVX) rats. MATERIAL AND METHODS: Twenty female Sprague-Dawley rats sequentially underwent bilateral ovariectomy and tibia implantation, and injection of 30 µg/implant zoledronic acid (ZOL) at the site of implantation was performed...
October 1, 2016: Archives of Medical Science: AMS
https://www.readbyqxmd.com/read/27690262/detection-of-bone-marrow-changes-related-to-estrogen-withdrawal-in-rats-with-a-tabletop-stray-field-nmr-scanner
#13
Yifat Sarda, Elad Bergman, Inbar Hillel, Itzhak Binderman, Uri Nevo
PURPOSE: Osteoporosis is characterized by a decrease in bone mineral density (BMD). A preliminary stage of the disease is progressive bone marrow adiposity, caused by imbalance between osteogenesis and adipogenesis in the marrow. Detection of osteoporosis relies on the quantification of BMD with techniques such as dual-energy X-ray absorptiometry. This work aimed to detect bone marrow changes in an experimental model of osteopenia using a low-field tabletop NMR scanner. METHODS: An experiment was performed on 32 female rats, 3 months old, 16 of which were ovariectomized (OVX) and 16 were sham-operated (sham)...
September 30, 2016: Magnetic Resonance in Medicine: Official Journal of the Society of Magnetic Resonance in Medicine
https://www.readbyqxmd.com/read/27681765/evaluation-of-functional-marrow-irradiation-based-on-skeletal-marrow-composition-obtained-using-dual-energy-computed-tomography
#14
Taiki Magome, Jerry Froelich, Yutaka Takahashi, Luke Arentsen, Shernan Holtan, Michael R Verneris, Keenan Brown, Akihiro Haga, Keiichi Nakagawa, Jennifer L Holter Chakrabarty, Sebastian Giebel, Jeffrey Wong, Kathryn Dusenbery, Guy Storme, Susanta K Hui
PURPOSE: To develop an imaging method to characterize and map marrow composition in the entire skeletal system, and to simulate differential targeted marrow irradiation based on marrow composition. METHODS AND MATERIALS: Whole-body dual energy computed tomography (DECT) images of cadavers and leukemia patients were acquired, segmented to separate bone marrow components, namely, bone, red marrow (RM), and yellow marrow (YM). DECT-derived marrow fat fraction was validated using histology of lumbar vertebrae obtained from cadavers...
November 1, 2016: International Journal of Radiation Oncology, Biology, Physics
https://www.readbyqxmd.com/read/27648658/to-assess-differential-features-of-marrow-adiposity-between-postmenopausal-women-with-osteoarthritis-and-osteoporosis-using-water-fat-mri
#15
Guanwu Li, Zheng Xu, Jingzheng Fan, Wei Yuan, Lina Zhang, Lingmi Hou, Dongmei Wu, Shixin Chang, Horea Calimente, Jiani Hu
OBJECTIVE: To assess the differential features of marrow adiposity between osteoarthritis (OA) and osteoporosis (OP) in postmenopausal women using water/fat MRI. METHODS: This cross-sectional study included 97 postmenopausal women (OA [n = 25], OA + osteopenia [n = 27], OA + OP [n = 23], and OP groups [n = 22]). Water/fat MRI, dual-energy x-ray absorptiometry and biochemical analysis were performed to assess vertebral marrow fat fraction, bone mineral density, and bone biomarkers, respectively...
January 2017: Menopause: the Journal of the North American Menopause Society
https://www.readbyqxmd.com/read/27637728/marrow-fat-quality-differences-by-sex-in-healthy-adults
#16
Jamilly G Maciel, Iana M de Araújo, Adriana L Carvalho, Marcelo N Simão, Clara M Bastos, Luiz E A Troncon, Carlos E G Salmon, Francisco J A de Paula, Marcello H Nogueira-Barbosa
Several studies have demonstrated the relationship between bone marrow adiposity (BMAT) and bone mass. (1)H magnetic resonance spectroscopy is a noninvasive technique able to assess both BMAT quantity and quality. The aim of our study was to perform quantitative and qualitative analyses of BMAT and to investigate its association with bone mineral density (BMD) in healthy nonobese volunteers. Fifty-one healthy volunteers, 21 men and 30 women, underwent 1.5 T (1)H magnetic resonance spectroscopy of the lumbar spine...
September 13, 2016: Journal of Clinical Densitometry
https://www.readbyqxmd.com/read/27626477/primary-hyperparathyroidism-the-influence-of-bone-marrow-adipose-tissue-on-bone-loss-and-of-osteocalcin-on-insulin-resistance
#17
Maira L Mendonça, Sérgio L Batista, Marcello H Nogueira-Barbosa, Carlos E G Salmon, Francisco J A de Paula
OBJECTIVES: Bone marrow adipose tissue has been associated with low bone mineral density. However, no data exist regarding marrow adipose tissue in primary hyperparathyroidism, a disorder associated with bone loss in conditions of high bone turnover. The objective of the present study was to investigate the relationship between marrow adipose tissue, bone mass and parathyroid hormone. The influence of osteocalcin on the homeostasis model assessment of insulin resistance was also evaluated...
August 2016: Clinics
https://www.readbyqxmd.com/read/27529463/longitudinal-assessment-of-marrow-fat-content-using-three-point-dixon-technique-in-osteoporotic-rabbits
#18
Guanwu Li, Zheng Xu, Yilei Chen, Shixin Chang, Horea Calimente, Jiani Hu, Dongmei Wu
OBJECTIVE: In this longitudinal pilot study, we aimed to investigate the intra-, interobserver, and scan-rescan reproducibility of marrow fat fraction (FF) measurements using three-point Dixon imaging in osteoporotic rabbits: comparison with histopathology. METHODS: Twenty female rabbits were randomly assigned to sham-operation and ovariectomy in combination with daily methylprednisolone hemisuccinate groups (n = 10 per group). Marrow FF by three-point Dixon technique and bone density by dual-energy x-ray absorptiometry were assessed at baseline, 6 and 12 weeks after operation...
December 2016: Menopause: the Journal of the North American Menopause Society
https://www.readbyqxmd.com/read/27524684/water-cortical-bone-decomposition-a-new-approach-in-dual-energy-ct-imaging-for-bone-marrow-oedema-detection-a-feasibility-study
#19
M Biondi, E Vanzi, G De Otto, F Banci Buonamici, G M Belmonte, L N Mazzoni, A Guasti, S F Carbone, M A Mazzei, A La Penna, E Foderà, D Guerreri, A Maiolino, L Volterrani
INTRODUCTION: Many studies aimed at validating the application of Dual Energy Computed Tomography (DECT) in clinical practice where conventional CT is not exhaustive. An example is given by bone marrow oedema detection, in which DECT based on water/calcium (W/Ca) decomposition was applied. In this paper a new DECT approach, based on water/cortical bone (W/CB) decomposition, was investigated. MATERIALS AND METHODS: Eight patients suffering from marrow oedema were scanned with MRI and DECT...
December 2016: Physica Medica: PM
https://www.readbyqxmd.com/read/27524505/preclinical-evaluation-of-a-diabody-based-177-lu-radioimmunoconjugate-for-cd22-directed-radioimmunotherapy-in-a-non-hodgkin-lymphoma-mouse-model
#20
Tobias Weber, Benedikt Bötticher, Michaela A E Arndt, Walter Mier, Max Sauter, Evelyn Exner, Armin Keller, Susanne Krämer, Karin Leotta, Artjom Wischnjow, Ludger Grosse-Hovest, Dirk Strumberg, Dirk Jäger, Hermann-Josef Gröne, Uwe Haberkorn, Gottfried Brem, Jürgen Krauss
Radioimmunotherapy is considered as treatment option in recurrent and/or refractory B-cell non-Hodgkin lymphoma (B-NHL). To overcome the dose limiting bone marrow toxicity of IgG-based radioimmunoconjugates (RICs), we modified a humanized diabody with 5-, 10-, or 20-kDa polyethylene glycol (PEG) for CD22-targeted radioimmunotherapy using the low-energy β-emitter lutetium-177 ((177)Lu). A favorable pharmacokinetic profile was observed for the 10-kDa-PEG-diabody in nude mice being xenografted with subcutaneous human Burkitt lymphoma...
October 28, 2016: Cancer Letters
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