keyword
MENU ▼
Read by QxMD icon Read
search

Patient centred imaging

keyword
https://www.readbyqxmd.com/read/28086892/pressure-ulcer-image-segmentation-technique-through-synthetic-frequencies-generation-and-contrast-variation-using-toroidal-geometry
#1
Ortiz P David, Daniel Sierra-Sosa, Begoña García Zapirain
BACKGROUND: Pressure ulcers have become subject of study in recent years due to the treatment high costs and decreased life quality from patients. These chronic wounds are related to the global life expectancy increment, being the geriatric and physical disable patients the principal affected by this condition. Injuries diagnosis and treatment usually takes weeks or even months by medical personel. Using non-invasive techniques, such as image processing techniques, it is possible to conduct an analysis from ulcers and aid in its diagnosis...
January 6, 2017: Biomedical Engineering Online
https://www.readbyqxmd.com/read/28079743/normal-radiographic-parameters-in-paediatric-pelvic-radiographs-from-a-chinese-population
#2
Evelyn E Kuong, William T Gardner, Paul A Koljonen, Sudhir K Mahapatra, Wang Chow
: Paediatric pelvic and hip radiographs are a common investigation used when assessing a child for suspected developmental dysplasia of the hip. This report describes an attempt to establish normal values of medial joint space, acetabular index and centre edge angle according to specific age groups and sex in a Chinese population. Patients who had undergone a pelvic radiograph as part of their assessment, but were subsequently found to have normal hips were recruited retrospectively. These patients were grouped according to sex and age; medial joint space, acetabular index and centre edge angle were measured in all radiographs...
January 10, 2017: Journal of Pediatric Orthopedics. Part B
https://www.readbyqxmd.com/read/28078834/magnetic-resonance-imaging-findings-of-patients-with-suspected-tuberculosis-from-a-tertiary-care-centre-in-sri-lanka
#3
A S Pallewatte, N A Wickramasinghe
Introduction: Spinal tuberculosis (TB) is a relatively common cause for spinal pathology in Sri Lanka and a common indication for magnetic resonance imaging (MRI). Objectives: The objective of the study was to describe the MRI imaging pattern of spinal TB in a series of patients. Methods: One hundred and nine patients with clinically confirmed spinal tuberculosis who had undergone MRI scans at the National Hospital of Sri Lanka from 2012-2016 were included in the study...
30, 2016: Ceylon Medical Journal
https://www.readbyqxmd.com/read/28077100/incidence-of-solitary-pulmonary-nodules-in-northeastern-france-a-population-based-study-in-five-regions
#4
Émilie Marrer, Damien Jolly, Patrick Arveux, Catherine Lejeune, Marie-Christine Woronoff-Lemsi, Jérémie Jégu, Francis Guillemin, Michel Velten
BACKGROUND: The discovery of a solitary pulmonary nodule (SPN) on a chest imaging exam is of major clinical concern. However, the incidence rates of SPNs in a general population have not been estimated. The objective of this study was to provide incidence estimates of SPNs in a general population in 5 northeastern regions of France. METHODS: This population-based study was undertaken in 5 regions of northeastern France in May 2002-March 2003 and May 2004-June 2005...
January 11, 2017: BMC Cancer
https://www.readbyqxmd.com/read/28065612/vertebral-tortuosity-index-in-patients-with-non-connective-tissue-disorder-related-aneurysm-disease
#5
F Virgilio, B Maurel, M Davis, G Hamilton, T M Mastracci
OBJECTIVE: The vertebral tortuosity index (VTI) predicts increased risk of acute aortic events in patients with known genetic aortopathies. This study describes the VTI in a cohort of patients with non-connective tissue disorder-related large aneurysms. METHODS: Hospital imaging records from July 2012 to March 2016 were interrogated to identify patients with aneurysmal disease who had undergone computed tomographic angiography that included imaging of vertebral arteries...
January 5, 2017: European Journal of Vascular and Endovascular Surgery
https://www.readbyqxmd.com/read/28061823/a-case-report-in-cardiovascular-magnetic-resonance-the-contrast-agent-matters-in-amyloid
#6
Marianna Fontana, Thomas A Treibel, Ana Martinez-Naharro, Stefania Rosmini, Raymond Y Kwong, Julian D Gillmore, Philip N Hawkins, James C Moon
BACKGROUND: Cardiac amyloidosis is a progressive but underdiagnosed and underappreciated cause of heart failure. In the last few years, cardiovascular magnetic resonance (CMR) has become the gold standard for non invasive diagnosis of cardiac amyloidosis with the characteristic subendocardial late gadolinium enhancement. CASE PRESENTATION: We describe a case of a patient who, in the process of aligning protocols for a trial between different centers, had a paired study with two different contrast agents, Dotarem® and MultiHance®...
January 7, 2017: BMC Medical Imaging
https://www.readbyqxmd.com/read/28055246/validation-of-a-semi-automated-technique-to-accurately-measure-abdominal-fat-distribution-using-ct-and-mri-for-clinical-risk-stratification
#7
Mohammed Abdul Waduud, Amal Sharaf, Iain Roy, Rosario Lopez-Gonzalez, Andrew Hart, David McGill, Giles Roditi, John Biddlestone
OBJECTIVES: A valid method for accurate quantification of abdominal fat distribution (AFD) using both computer tomography (CT) and magnetic resonance imaging (MRI) is described. This method will be primarily useful in the prospective risk stratification of patients undergoing reconstructive breast surgery. Secondary applications in many other clinical specialities are foreseen. METHODS: 15 sequential patients who had undergone breast reconstruction following both CT and MRI imaging (30 scans) were retrospectively identified at our single centre...
January 5, 2017: British Journal of Radiology
https://www.readbyqxmd.com/read/28053300/a-medical-thermal-imaging-device-for-the-prevention-of-diabetic-foot-ulceration
#8
Graham Machin, Aaron Whittam, Suhail Ainarkar, John Allen, John Bevans, Michael Edmonds, Ben Kluwe, Audrey Macdonald, Nina Petrova, Peter Plassmann, Francis Ring, Leon Rogers, Rob Simpson
In this paper a description is given of the development, characterisation and first results of a thermal imaging device aimed at significantly reducing the incidence of diabetic foot ulceration (DFU). These devices will be used in three clinical centres and in two preliminary clinical trials. The first will be on healthy volunteers to set a robust baseline for the overall research aims and the second on >100 patients at high risk of DFU. In the second phase of the project the objective is to demonstrate significant reduction in the incidence of DFU through a comparison of the results of standard care of high risk feet with standard care plus thermal imaging...
January 5, 2017: Physiological Measurement
https://www.readbyqxmd.com/read/28048898/mo-fg-brc-03-design-and-construction-of-a-dielectiric-wall-accelerator
#9
D Westerly
Experimental research in medical physics has expanded the limits of our knowledge and provided novel imaging and therapy technologies for patients around the world. However, experimental efforts are challenging due to constraints in funding, space, time and other forms of institutional support. In this joint ESTRO-AAPM symposium, four exciting experimental projects from four different countries are highlighted. Each project is focused on a different aspect of radiation therapy. From the USA, we will hear about a new linear accelerator concept for more compact and efficient therapy devices...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28048554/th-ab-202-03-a-novel-tool-for-computing-deliverable-doses-in-dynamic-mlc-tracking-treatments
#10
M Fast, C Kamerling, S Crijns, M Menten, S Nill, B Raaymakers, U Oelfke
PURPOSE: In tracked dynamic multi-leaf collimator (MLC) treatments, segments are continuously adapted to the target centroid motion in beams-eye-view. On-the-fly segment adaptation, however, potentially induces dosimetric errors due to the finite MLC leaf width and non-rigid target motion. In this study, we outline a novel tool for computing the 4d dose of lung SBRT plans delivered with MLC tracking. METHODS: The following automated workflow was developed: A) centroid tracking, where the initial segments are morphed to each 4dCT phase based on the beams-eye-view GTV shift (followed by a dose calculation on each phase); B) re-optimized tracking, in which all morphed initial plans from (A) are further optimised ("warm-started") in each 4dCT phase using the initial optimisation parameters but phase-specific volume definitions...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28048246/mo-fg-brc-04-ionacoustic-imaging-for-particle-range-verification
#11
K Parodi
Experimental research in medical physics has expanded the limits of our knowledge and provided novel imaging and therapy technologies for patients around the world. However, experimental efforts are challenging due to constraints in funding, space, time and other forms of institutional support. In this joint ESTRO-AAPM symposium, four exciting experimental projects from four different countries are highlighted. Each project is focused on a different aspect of radiation therapy. From the USA, we will hear about a new linear accelerator concept for more compact and efficient therapy devices...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28048018/su-f-j-52-a-novel-approach-to-x-ray-tube-quality-assurance-for-cbct-systems-in-order-to-better-assess-the-patient-imaging-dose-in-a-large-multi-unit-treatment-facility
#12
L Buckley, R Webb, C Lambert, B Nyiri, L Gerig
PURPOSE: To standardize the tube calibration for Elekta XVI cone beam CT (CBCT) systems in order to provide a meaningful estimate of the daily imaging dose and reduce the variation between units in a large centre with multiple treatment units. METHODS: Initial measurements of the output from the CBCT systems were made using a Farmer chamber and standard CTDI phantom. The correlation between the measured CTDI and the tube current was confirmed using an Unfors Xi detector which was then used to perform a tube current calibration on each unit...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28047462/mo-fg-brc-00-joint-aapm-estro-symposium-advances-in-experimental-medical-physics
#13
Ross Berbeco, Dan Ionascu
Experimental research in medical physics has expanded the limits of our knowledge and provided novel imaging and therapy technologies for patients around the world. However, experimental efforts are challenging due to constraints in funding, space, time and other forms of institutional support. In this joint ESTRO-AAPM symposium, four exciting experimental projects from four different countries are highlighted. Each project is focused on a different aspect of radiation therapy. From the USA, we will hear about a new linear accelerator concept for more compact and efficient therapy devices...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28047094/we-ab-202-10-modelling-individual-tumor-specific-control-probability-for-hypoxia-in-rectal-cancer
#14
S Warren, D R Warren, J M Wilson, R Muirhead, M A Hawkins, T Maughan, M Partridge
PURPOSE: To investigate hypoxia-guided dose-boosting for increased tumour control and improved normal tissue sparing using FMISO-PET images METHODS: Individual tumor-specific control probability (iTSCP) was calculated using a modified linear-quadratic model with rectal-specific radiosensitivity parameters for three limiting-case assumptions of the hypoxia / FMISO uptake relationship. (18) FMISO-PET images from 2 patients (T3N0M0) from the RHYTHM trial (Investigating Hypoxia in Rectal Tumours NCT02157246) were chosen to delineate a hypoxic region (GTV_MISO defined as tumor-to-muscle ratio > 1...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28046835/mo-fg-brc-02-low-z-switching-linear-accelerator-targets-new-options-for-image-guidance-and-dose-enhancement-in-radiotherapy
#15
J Robar
Experimental research in medical physics has expanded the limits of our knowledge and provided novel imaging and therapy technologies for patients around the world. However, experimental efforts are challenging due to constraints in funding, space, time and other forms of institutional support. In this joint ESTRO-AAPM symposium, four exciting experimental projects from four different countries are highlighted. Each project is focused on a different aspect of radiation therapy. From the USA, we will hear about a new linear accelerator concept for more compact and efficient therapy devices...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28046808/mo-fg-brc-01-mr-guided-radiation-therapy-with-gadolinium-nanoparticles-from-chalkboard-to-first-clinical-trials
#16
L Sancey
Experimental research in medical physics has expanded the limits of our knowledge and provided novel imaging and therapy technologies for patients around the world. However, experimental efforts are challenging due to constraints in funding, space, time and other forms of institutional support. In this joint ESTRO-AAPM symposium, four exciting experimental projects from four different countries are highlighted. Each project is focused on a different aspect of radiation therapy. From the USA, we will hear about a new linear accelerator concept for more compact and efficient therapy devices...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28046717/su-f-j-214-dose-reduction-by-spatially-optimized-image-quality-via-fluence-modulated-proton-ct-fmpct
#17
L De Angelis, G Landry, D Hansen, S Rit, C Belka, G Dedes, K Parodi
PURPOSE: Proton CT (pCT) is a promising imaging modality for reducing range uncertainty in image-guided proton therapy. Range uncertainties partially originate from X-ray CT number conversion to stopping power ratio (SPR) and are limiting the exploitation of the full potential of proton therapy. In this study we explore the concept of spatially dependent fluence modulated proton CT (FMpCT), for achieving optimal image quality in a clinical region of interest (ROI), while reducing significantly the imaging dose to the patient...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28046695/mo-de-bra-03-the-ottawa-medical-physics-institute-ompi-a-practical-model-for-academic-program-collaboration-in-a-multi-centre-city
#18
M McEwen, D Rogers, P Johns/Sup
PURPOSE: To build a world-class medical physics educational program that capitalizes on expertise distributed over several clinical, government, and academic centres. Few if any of these centres would have the critical mass to solely resource a program. METHODS: In order to enable an academic program, stakeholders from five institutions made a proposal to Carleton University for a) a research network with defined membership requirements and a process for accepting new members, and b) a graduate specialization (MSc and PhD) in medical physics...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28046500/tu-h-campus-jep1-03-results-from-a-multi-institution-study-on-image-quality-impact-in-deformable-image-registration
#19
G Loi, M Fusella, E Lanzi, C Fiandra, G Orlani, F Lucio, S Strolin, E Gino, E Mezzenga, A Roggio, E Cagni, S Vigorito
PURPOSE: Various commercial algorithms for deformable image registration (DIR) were tested to investigate their accuracy and robustness, against image noise and artifacts. METHODS: Ten institutions with five available commercial solutions provided data to assess the agreement of DIR-propagated ROIs with automatically drawn ROIs considered as ground-truth for the comparison. The DIR algorithms were tested on real patient data (pelvis). A Deformation was applied to the reference data set (CTref) using the ImSimQA software, a (CTeval) and seven CBCT images with increasing level of noise and capping artifacts were simulated...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28043993/safety-and-reproducibility-of-virtual-assisted-lung-mapping-a-multicentre-study-in-japan%C3%A2
#20
Masaaki Sato, Taiji Kuwata, Keiji Yamanashi, Atsushi Kitamura, Kenji Misawa, Kota Imashimizu, Masashi Kobayashi, Masaki Ikeda, Terumoto Koike, Shinji Kosaka, Ryuta Fukai, Yasuo Sekine, Noritaka Isowa, Shin Hirayama, Hiroaki Sakai, Fumiaki Watanabe, Kazuhiro Nagayama, Akihiro Aoyama, Hiroshi Date, Jun Nakajima
OBJECTIVES: Virtual-assisted lung mapping (VAL-MAP) is a preoperative bronchoscopic multispot dye-marking technique using virtual images. The purpose of this study was to evaluate the safety, efficacy and reproducibility of VAL-MAP among multiple centres. METHODS: Selection criteria included patients with pulmonary lesions anticipated to be difficult to identify at thoracoscopy and/or those undergoing sub-lobar lung resections requiring careful determination of resection margins...
January 2, 2017: European Journal of Cardio-thoracic Surgery
keyword
keyword
43654
1
2
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"