keyword
MENU ▼
Read by QxMD icon Read
search

Dual energy CT for musculoskeletal system

keyword
https://www.readbyqxmd.com/read/27870622/dual-energy-ct-for-the-musculoskeletal-system
#1
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/26128834/tu-ab-204-00-advances-in-cone-beam-ct-and-emerging-applications
#2
(no author information available yet)
UNLABELLED: This symposium highlights advanced cone-beam CT (CBCT) technologies in four areas of emerging application in diagnostic imaging and image-guided interventions. Each area includes research that extends the spatial, temporal, and/or contrast resolution characteristics of CBCT beyond conventional limits through advances in scanner technology, acquisition protocols, and 3D image reconstruction techniques.Dr. G. Chen (University of Wisconsin) will present on the topic: Advances in C-arm CBCT for Brain Perfusion Imaging...
June 2015: Medical Physics
https://www.readbyqxmd.com/read/26128832/tu-ab-204-01-advances-in-c-arm-cbct-for-brain-perfusion-imaging
#3
G Chen
UNLABELLED: This symposium highlights advanced cone-beam CT (CBCT) technologies in four areas of emerging application in diagnostic imaging and image-guided interventions. Each area includes research that extends the spatial, temporal, and/or contrast resolution characteristics of CBCT beyond conventional limits through advances in scanner technology, acquisition protocols, and 3D image reconstruction techniques.Dr. G. Chen (University of Wisconsin) will present on the topic: Advances in C-arm CBCT for Brain Perfusion Imaging...
June 2015: Medical Physics
https://www.readbyqxmd.com/read/26128830/tu-ab-204-03-advances-in-cbct-for-orhtopaedics-and-bone-health-imaging
#4
W Zbijewski
UNLABELLED: This symposium highlights advanced cone-beam CT (CBCT) technologies in four areas of emerging application in diagnostic imaging and image-guided interventions. Each area includes research that extends the spatial, temporal, and/or contrast resolution characteristics of CBCT beyond conventional limits through advances in scanner technology, acquisition protocols, and 3D image reconstruction techniques.Dr. G. Chen (University of Wisconsin) will present on the topic: Advances in C-arm CBCT for Brain Perfusion Imaging...
June 2015: Medical Physics
https://www.readbyqxmd.com/read/26128829/tu-ab-204-02-advances-in-c-arm-cbct-for-cardiac-interventions
#5
R Fahrig
UNLABELLED: This symposium highlights advanced cone-beam CT (CBCT) technologies in four areas of emerging application in diagnostic imaging and image-guided interventions. Each area includes research that extends the spatial, temporal, and/or contrast resolution characteristics of CBCT beyond conventional limits through advances in scanner technology, acquisition protocols, and 3D image reconstruction techniques.Dr. G. Chen (University of Wisconsin) will present on the topic: Advances in C-arm CBCT for Brain Perfusion Imaging...
June 2015: Medical Physics
https://www.readbyqxmd.com/read/26128828/tu-ab-204-04-advances-in-cbct-for-breast-imaging
#6
J Boone
UNLABELLED: This symposium highlights advanced cone-beam CT (CBCT) technologies in four areas of emerging application in diagnostic imaging and image-guided interventions. Each area includes research that extends the spatial, temporal, and/or contrast resolution characteristics of CBCT beyond conventional limits through advances in scanner technology, acquisition protocols, and 3D image reconstruction techniques.Dr. G. Chen (University of Wisconsin) will present on the topic: Advances in C-arm CBCT for Brain Perfusion Imaging...
June 2015: Medical Physics
https://www.readbyqxmd.com/read/25816992/good-interrater-reliability-of-a-new-grading-system-in-detecting-traumatic-bone-marrow-lesions-in-the-knee-by-dual-energy-ct-virtual-non-calcium-images
#7
Jian-Xin Cao, Yi-Min Wang, Xiang-Quan Kong, Cheng Yang, Peng Wang
OBJECTIVE: To evaluate the capacity of dual-energy computed tomography (DECT) virtual non-calcium (VNCa) images in detecting post-traumatic bone marrow lesions (BMLs) in the knee with a new grading system. METHODS: DECT and magnetic resonance (MR) imaging were used to examine acute trauma of the knee in 32 patients. VNCa images were generated by dual-energy subtraction of calcium, and the lower end of the femur and upper end of the tibia each were divided into six regions for grading of bone marrow by two musculoskeletal radiologists using a four-grading system (Grade 4, very obvious lesions; Grade 3, relatively obvious lesions; Grade 2, slight or suspicious lesion on VNCa image and mild lesion on MR image; Grade 1, normal bone marrow)...
June 2015: European Journal of Radiology
https://www.readbyqxmd.com/read/25708052/the-skeletal-muscle-cross-sectional-area-in-long-term-bisphosphonate-users-is-smaller-than-that-of-bone-mineral-density-matched-controls-with-increased-serum-pentosidine-concentrations
#8
Shigeharu Uchiyama, Shota Ikegami, Mikio Kamimura, Keijiro Mukaiyama, Yukio Nakamura, Kiichi Nonaka, Hiroyuki Kato
Bisphosphonates are effective in increasing bone mineral density (BMD), but fragility fractures can still occur despite bisphosphonate treatment. The purpose of this study was to determine if long-term bisphosphonate users have characteristic findings in the musculoskeletal system, which could put them at risk of developing typical or atypical femoral fractures. We recruited 40 female patients who had taken bisphosphonates for more than 3 years. The control group included 60 volunteers who were matched by age, body mass index, and dual-energy X-ray absorptiometry-derived BMDs...
June 2015: Bone
https://www.readbyqxmd.com/read/24985783/detection-of-occult-undisplaced-hip-fractures-with-a-dual-energy-ct-algorithm-targeted-to-detection-of-bone-marrow-edema
#9
T Reddy, P D McLaughlin, P I Mallinson, A C Reagan, P L Munk, S Nicolaou, H A Ouellette
The purpose of this study is to describe our initial clinical experience with dual-energy computed tomography (DECT) virtual non-calcium (VNC) images for the detection of bone marrow (BM) edema in patients with suspected hip fracture following trauma. Twenty-five patients presented to the emergency department at a level 1 trauma center between January 1, 2011 and January 1, 2013 with clinical suspicion of hip fracture and normal radiographs were included. All CT scans were performed on a dual-source, dual-energy CT system...
February 2015: Emergency Radiology
https://www.readbyqxmd.com/read/24684763/bone-mass-and-quality-in-patients-with-juvenile-idiopathic-arthritis-longitudinal-evaluation-of-bone-mass-determinants-by-using-dual-energy-x-ray-absorptiometry-peripheral-quantitative-computed-tomography-and-quantitative-ultrasonography
#10
Stefano Stagi, Loredana Cavalli, Carla Signorini, Federico Bertini, Marco Matucci Cerinic, Maria Luisa Brandi, Fernanda Falcini
INTRODUCTION: Our objective was to evaluate longitudinally the main bone-mass and quality predictors in young juvenile idiopathic arthritis (JIA) patients by using lumbar spine dual-energy X-ray absorptiometry (DXA) scan, radius peripheral quantitative computed tomography (pQCT), and phalangeal quantitative ultrasonography (QUS) at the same time. METHODS: In total, 245 patients (172 females, 73 males; median age, 15.6 years: 148 oligoarticular, 55 polyarticular, 20 systemic, and 22 enthesitis-related-arthritis (ERA) onset) entered the study...
March 31, 2014: Arthritis Research & Therapy
https://www.readbyqxmd.com/read/23097171/dual-energy-ct-a-promising-new-technique-for-assessment-of-the-musculoskeletal-system
#11
Savvakis Nicolaou, Teresa Liang, Darra T Murphy, Jeff R Korzan, Hugue Ouellette, Peter Munk
OBJECTIVE: Dual-energy CT (DECT) characterizes the chemical composition of material according to its differential x-ray attenuation at two different energy levels. Applications of DECT in musculoskeletal imaging include imaging of bone marrow edema, tendons, and ligaments and the use of monoenergetic techniques to minimize metal prosthesis beam-attenuating artifacts. CONCLUSION: The most validated application of DECT is undoubtedly its noninvasive and highly specific ability for confirming the presence of monosodium urate deposits in the assessment of gout...
November 2012: AJR. American Journal of Roentgenology
https://www.readbyqxmd.com/read/22896029/increased-organ-damage-associated-with-deterioration-in-volumetric-bone-density-and-bone-microarchitecture-in-patients-with-systemic-lupus-erythematosus-on-longterm-glucocorticoid-therapy
#12
Xiao Lin Tang, Tracy Yaner Zhu, Vivian W Hung, Ling Qin, Chun-Kwok Wong, Emily W Kun, Lai Shan Tam, Edmund K Li
OBJECTIVE: To evaluate bone quality in patients with systemic lupus erythematosus (SLE) who were undergoing longterm glucocorticoid (GC) therapy, and to focus on the correlation between bone quality and organ damage. METHODS: Seventy-eight female patients with SLE and organ damage taking longterm GC, and 72 age-matched SLE patients without damage taking longterm GC were recruited for study. Clinical variables of interest included disease activity, cumulative organ damage (by Systemic Lupus International Collaborating Clinics/American College of Rheumatology Damage Index; SDI), major organ involvement (musculoskeletal damage and neuropsychiatric damage, etc...
October 2012: Journal of Rheumatology
https://www.readbyqxmd.com/read/22894440/cascaded-systems-analysis-of-noise-and-detectability-in-dual-energy-cone-beam-ct
#13
Grace J Gang, Wojciech Zbijewski, J Webster Stayman, Jeffrey H Siewerdsen
PURPOSE: Dual-energy computed tomography and dual-energy cone-beam computed tomography (DE-CBCT) are promising modalities for applications ranging from vascular to breast, renal, hepatic, and musculoskeletal imaging. Accordingly, the optimization of imaging techniques for such applications would benefit significantly from a general theoretical description of image quality that properly incorporates factors of acquisition, reconstruction, and tissue decomposition in DE tomography. This work reports a cascaded systems analysis model that includes the Poisson statistics of x rays (quantum noise), detector model (flat-panel detectors), anatomical background, image reconstruction (filtered backprojection), DE decomposition (weighted subtraction), and simple observer models to yield a task-based framework for DE technique optimization...
August 2012: Medical Physics
https://www.readbyqxmd.com/read/20945292/dual-energy-ct-revisited-with-multidetector-ct-review-of-principles-and-clinical-applications
#14
REVIEW
Muşturay Karçaaltıncaba, Aykut Aktaş
Although dual-energy CT (DECT) was first conceived in the 1970s, it was not widely used for CT indications. Recently, the simultaneous acquisition of volumetric dual-energy data has been introduced using multidetector CT (MDCT) with two X-ray tubes and rapid kVp switching (gemstone spectral imaging). Two major advantages of DECT are material decomposition by acquiring two image series with different kVp and the elimination of misregistration artifacts. Hounsfield unit measurements by DECT are not absolute and can change depending on the kVp used for an acquisition...
September 2011: Diagnostic and Interventional Radiology: Official Journal of the Turkish Society of Radiology
https://www.readbyqxmd.com/read/20631020/a-randomized-controlled-trial-of-vitamin-d-supplementation-upon-musculoskeletal-health-in-postmenarchal-females
#15
RANDOMIZED CONTROLLED TRIAL
K A Ward, G Das, S A Roberts, J L Berry, J E Adams, R Rawer, M Z Mughal
CONTEXT: There has been a resurgence of vitamin D deficiency rickets throughout the developed world, with infants and adolescents being primarily affected. Adolescence is a crucial period for muscle and bone mineral accumulation. OBJECTIVE: The aim was to determine the effect of vitamin D supplementation on the adolescent musculoskeletal system. DESIGN AND SETTING: We conducted a community-based, double-blind, randomized controlled trial in a secondary school...
October 2010: Journal of Clinical Endocrinology and Metabolism
https://www.readbyqxmd.com/read/12933669/evidence-that-sensitivity-to-growth-hormone-gh-is-growth-period-and-tissue-type-dependent-studies-in-gh-deficient-lit-lit-mice
#16
Yuji Kasukawa, David J Baylink, Rongqing Guo, Subburaman Mohan
We previously found that the magnitude of skeletal deficits caused by GH deficiency varied during different growth periods. To test the hypothesis that the sensitivity to GH is growth period dependent, we treated GH-deficient lit/lit mice with GH (4 mg/kg body weight.d) or vehicle during the prepubertal and pubertal (d 7-34), pubertal (d 23-34), postpubertal (d 42-55), and adult (d 204-217) periods and evaluated GH effects on the musculoskeletal system by dual energy x-ray absorptiometry (DEXA) and peripheral quantitative computed tomography...
September 2003: Endocrinology
https://www.readbyqxmd.com/read/11537418/musculoskeletal-adaptation-to-mechanical-forces-on-earth-and-in-space
#17
REVIEW
R Whalen
A major concern of the US and Soviet (Russian) space programs is the health and safety of astronauts and cosmonauts. One of the areas receiving the most attention has been the effects of long duration space flight on the musculoskeletal system. During the Skylab period exercise programs and bone densitometry equipment were evolving. No treadmills were included on either Skylab-1 or Skylab-2, and only a teflon pad and elastic cords were available on Skylab-4. During the same period the Russians were beginning to experiment with longer duration space flight culminating in a milestone flight of 366 days in 1987-1988...
1993: Physiologist
https://www.readbyqxmd.com/read/1292542/technologic-advances-in-diagnostic-radiology
#18
EDITORIAL
E L Nickoloff
Technologic advances in radiographic equipment and procedures for four different areas of diagnostic radiology are reviewed: bone mineral assessments, musculoskeletal imaging, mammography, and chest imaging. For bone mineral assessments the accuracy and precision obtained using single- and dual-energy photon absorptiometry, dual-energy x-ray absorptiometry, and quantitative CT are summarized. Various digital systems employed in musculoskeletal imaging are reviewed. In mammography, papers related to accreditation and research interests are highlighted...
1992: Current Opinion in Radiology
1
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"