keyword
MENU ▼
Read by QxMD icon Read
search

MRI Guided

keyword
https://www.readbyqxmd.com/read/28431428/computational-and-in-vitro-experimental-investigation-of-intrathecal-drug-distribution-parametric-study-of-the-effect-of-injection-volume-cerebrospinal-fluid-pulsatility-and-drug-uptake
#1
Kevin M Tangen, Roxanne Leval, Ankit I Mehta, Andreas A Linninger
BACKGROUND: Intrathecal drug delivery is an attractive option to circumvent the blood-brain barrier for pain management through its increased efficacy of pain relief, reduction in adverse side effects, and cost-effectiveness. Unfortunately, there are limited guidelines for physicians to choose infusion or drug pump settings to administer therapeutic doses to specific regions of the spine or the brain. Although empiric trialing of intrathecal drugs is critical to determine the sustained side effects, currently there is no inexpensive in vitro method to guide the selection of spinal drug delivery parameters...
May 2017: Anesthesia and Analgesia
https://www.readbyqxmd.com/read/28427923/-acute-leukemia-revealed-by-bone-magnetic-resonance-imaging-two-pediatric-case-reports
#2
C Flatrès, A Pennanéach, G Blondin, E Rivoal, S Haro, P Vic
Bone and joint pain are common causes of pediatric consultation for a variety of etiologies. The causes are mostly traumatic or infectious or have an inflammatory origin. Acute leukemia (AL) can sometimes begin with osteoarticular signs and radiological investigations such as magnetic resonance imaging (MRI) can help guide the diagnosis. We report on two cases of pediatric AL revealed by osteoarticular signs, with MRI helpful in the diagnostic procedure. In these children, the first signs were recurrent joint pain, with no blood count anomalies...
April 17, 2017: Archives de Pédiatrie: Organe Officiel de la Sociéte Française de Pédiatrie
https://www.readbyqxmd.com/read/28427368/complications-of-miliary-tuberculosis-low-mortality-and-predictive-biomarkers-from-a-uk-cohort
#3
Jonathan Underwood, Fiona Cresswell, Alex P Salam, Alex J Keeley, Charles Cleland, Laurence John, Robert N Davidson
BACKGROUND: Untreated, miliary tuberculosis (TB) has a mortality approaching 100%. As it is uncommon there is little specific data to guide its management. We report detailed data from a UK cohort of patients with miliary tuberculosis and the associations and predictive ability of admission blood tests with clinical outcomes. METHODS: Routinely collected demographic, clinical, blood, imaging, histopathological and microbiological data were assessed for all patients with miliary TB identified from the London TB register from 2008 to 2012 from Northwest London Hospitals NHS Trust...
April 20, 2017: BMC Infectious Diseases
https://www.readbyqxmd.com/read/28426432/surface-as-a-motion-surrogate-for-gated-re-scanned-pencil-beam-proton-therapy
#4
Ye Zhang, Isabel Huth, Martin Wegner, Damien C Weber, Antony J Lomax
This simulation study investigated the dosimetric effectiveness and treatment efficiency of surface motion guided gating of pencil beam scanning (PBS) proton therapy for liver tumour treatments. Dedicated 4D dose calculations were performed for simulating gated treatments using 4DCT data for six patients derived from 4DMRI (4DCT(MRI)). Surface motion as a surrogate for tumour motion was extracted from the 4DMRI images and a linear internal-external correlation model applied to derive amplitude-based gating windows (GWs) of 10 and 5 mm...
April 20, 2017: Physics in Medicine and Biology
https://www.readbyqxmd.com/read/28425431/characterization-of-spatial-distortion-in-a-0-35t-mri-guided-radiotherapy-system
#5
John S Ginn, Nzhde Agazaryan, Minsong Cao, Umar Baharom, Daniel Low, Yingli Yang, Yu Gao, Peng Hu, Percy Lee, James Lamb
Spatial distortion results in image deformation that can degrade accurate targeting and dose calculations in MRI-guided adaptive radiotherapy. The authors present a comprehensive assessment of a 0.35T MRI-guided radiotherapy system's spatial distortion using two commercially-available phantoms with regularly spaced markers. Images of the spatial integrity phantoms were acquired using five clinical protocols on the MRI-guided radiotherapy machine with the radiotherapy gantry positioned at various angles. Software was developed to identify and localize all phantom markers using a template matching approach...
April 20, 2017: Physics in Medicine and Biology
https://www.readbyqxmd.com/read/28424869/review-on-diagnosis-and-management-of-urolithiasis-in-pregnancy-an-esut-practical-guide-for-urologists
#6
REVIEW
Bhaskar K Somani, Athanasios Dellis, Evangellos Liatsikos, Andreas Skolarikos
PURPOSE: Management of urolithiasis in pregnancy can be challenging for most urologists with diagnostic and treatment dilemma to ensure the best outcome for both mother and fetus. We wanted to review the literature for urolithiasis in pregnancy with a practical management guide for urologists. METHODS: A non-systematic review of literature was carried out for all English language literature using Medline. To ensure a more comprehensive search, the review of diagnosis and management of pregnant patients with urolithiasis was carried out separately, by two authors independently...
April 19, 2017: World Journal of Urology
https://www.readbyqxmd.com/read/28424829/-mri-of-the-prostate
#7
D Nörenberg, O Solyanik, B Schlenker, G Magistro, B Ertl-Wagner, D A Clevert, C Stief, M F Reiser, M D'Anastasi
New clinical and technological advances in the field of magnetic resonance imaging (MRI) and targeted image-guided biopsy techniques have significantly improved the detection, localization and staging as well as active surveillance of prostate cancer in recent years. Multiparametric MRI (mpMRI) is currently the main imaging technique for the detection, characterization and diagnostics of metastasizing prostate cancer and is of high diagnostic importance for local staging within the framework of the detection of prostate cancer...
April 19, 2017: Der Urologe. Ausg. A
https://www.readbyqxmd.com/read/28422738/peripheral-zone-volume-ratio-pz-ratio-is-relevant-with-biopsy-results-and-can-increase-the-accuracy-of-current-diagnostic-modality
#8
Yifan Chang, Rui Chen, Qingsong Yang, Xu Gao, Chuanliang Xu, Jianping Lu, Yinghao Sun
The current diagnostic modality of prostate cancer based on prostate specific antigen (PSA) and systematic biopsy is far from ideal in terms of over-diagnosing indolent prostate cancer and missing significant ones. Thus we integrated the peripheral zone volume ratio (PZ-ratio) for diagnostic refinement. This retrospective study included 247 consecutive patients who underwent initial transrectal ultrasound-guided systematic prostate biopsy from April 2014 to November 2015. Prostate volume was determined by semi-automatic contour on axial T2 weighted magnetic resonance imaging (MRI)...
March 31, 2017: Oncotarget
https://www.readbyqxmd.com/read/28421162/r-ideal-a-framework-for-systematic-clinical-evaluation-of-technical-innovations-in-radiation-oncology
#9
Helena M Verkooijen, Linda G W Kerkmeijer, Clifton D Fuller, Robbert Huddart, Corinne Faivre-Finn, Marcel Verheij, Stella Mook, Arjun Sahgal, Emma Hall, Chris Schultz
The pace of innovation in radiation oncology is high and the window of opportunity for evaluation narrow. Financial incentives, industry pressure, and patients' demand for high-tech treatments have led to widespread implementation of innovations before, or even without, robust evidence of improved outcomes has been generated. The standard phase I-IV framework for drug evaluation is not the most efficient and desirable framework for assessment of technological innovations. In order to provide a standard assessment methodology for clinical evaluation of innovations in radiotherapy, we adapted the surgical IDEAL framework to fit the radiation oncology setting...
2017: Frontiers in Oncology
https://www.readbyqxmd.com/read/28420932/sporadic-actinomycosis-of-the-hip-complicated-by-central-nervous-system-infection
#10
Mohammad Aamer Saleem, Zain Ul Abideen, Iram Shakir Kiani, Anum Yousaf, Amna Rasheed, Raja Wajid Shabbir
Actinomycosis is caused by the Gram positive filamentous Actinomyces bacterial species that are normal commensals of the oral cavity. Due to their low virulence, disease is rare in the immune competent patient. Although it may afflict any system in the body, involvement of the musculoskeletal system is uncommon. Here in, we describe the case of a 60 year old lady presenting with low grade fever, left hip pain and drowsiness. She was diagnosed as left hip actinomycosis on Computed tomogram (CT) guided biopsy and histopathological analysis of infiltrative lesions identified on Magnetic Resonance Imaging (MRI)...
April 2017: JPMA. the Journal of the Pakistan Medical Association
https://www.readbyqxmd.com/read/28420598/1-5-t-augmented-reality-navigated-interventional-mri-paravertebral-sympathetic-plexus-injections
#11
David R Marker, Paweena U Thainual, Tamas Ungi, Aaron J Flammang, Gabor Fichtinger, Iulian I Iordachita, John A Carrino, Jan Fritz
PURPOSE: The high contrast resolution and absent ionizing radiation of interventional magnetic resonance imaging (MRI) can be advantageous for paravertebral sympathetic nerve plexus injections. We assessed the feasibility and technical performance of MRI-guided paravertebral sympathetic injections utilizing augmented reality navigation and 1.5 T MRI scanner. METHODS: A total of 23 bilateral injections of the thoracic (8/23, 35%), lumbar (8/23, 35%) and hypogastric (7/23, 30%) paravertebral sympathetic plexus were prospectively planned in twelve human cadavers using a 1...
April 18, 2017: Diagnostic and Interventional Radiology: Official Journal of the Turkish Society of Radiology
https://www.readbyqxmd.com/read/28420444/case-report-acth-secreting-pituitary-carcinoma-metastatic-to-the-liver-in-a-patient-with-a-history-of-atypical-pituitary-adenoma-and-cushing-s-disease
#12
Amy S Joehlin-Price, Douglas A Hardesty, Christina A Arnold, Lawrence S Kirschner, Daniel M Prevedello, Norman L Lehman
BACKGROUND: Pituitary carcinoma is a rare entity requiring the presence of metastasis to confirm its malignant potential. We report a case of pituitary carcinoma and discuss the diagnosis and management of this lesion in relation to the existing literature. CASE PRESENTATION: The patient is a 51-year-old woman with Cushing's disease and intact adrenal glands who was diagnosed with metastatic pituitary carcinoma to the liver, 29 months after initial resection of an ACTH-secreting primary atypical pituitary adenoma (APA)...
April 18, 2017: Diagnostic Pathology
https://www.readbyqxmd.com/read/28419284/laser-thermal-ablation-for-metastases-failing-radiosurgery-a-multicentered-retrospective-study
#13
Tafadzwa L Chaunzwa, Di Deng, Eric C Leuthardt, Stephen B Tatter, Alireda M Mohammadi, Gene H Barnett, Veronica L Chiang
BACKGROUND: Radiosurgical failure following stereotactic radiosurgery for brain metastases can be attributed to tumor regrowth or radiation necrosis. MRI-guided laser thermal ablation (LTA) therapy has emerged as an option for treatment; however, previous literature demonstrates variable results across centers. OBJECTIVE: To assess the outcomes of LTA in the treatment of metastases failing radiosurgery across multiple centers and to determine if any treatment factors are predictive of outcome...
April 13, 2017: Neurosurgery
https://www.readbyqxmd.com/read/28416450/denoise-diffusion-weighted-images-using-higher-order-singular-value-decomposition
#14
Xinyuan Zhang, Jie Peng, Man Xu, Wei Yang, Zhe Zhang, Hua Guo, Wufan Chen, Qianjin Feng, Ed X Wu, Yanqiu Feng
Noise usually affects the reliability of quantitative analysis in diffusion-weighted (DW) magnetic resonance imaging (MRI), especially at high b-values and/or high spatial resolution. Higher-order singular value decomposition (HOSVD) has recently emerged as a simple, effective, and adaptive transform to exploit sparseness within multidimensional data. In particular, the patch-based HOSVD denoising has demonstrated superb performance when applied to T1-, T2-, and proton density-weighted MRI data. In this study, we aim to investigate the feasibility of denoising DW data using the HOSVD transform...
April 14, 2017: NeuroImage
https://www.readbyqxmd.com/read/28415140/imaging-modalities-for-characterising-focal-pancreatic-lesions
#15
REVIEW
Lawrence Mj Best, Vishal Rawji, Stephen P Pereira, Brian R Davidson, Kurinchi Selvan Gurusamy
BACKGROUND: Increasing numbers of incidental pancreatic lesions are being detected each year. Accurate characterisation of pancreatic lesions into benign, precancerous, and cancer masses is crucial in deciding whether to use treatment or surveillance. Distinguishing benign lesions from precancerous and cancerous lesions can prevent patients from undergoing unnecessary major surgery. Despite the importance of accurately classifying pancreatic lesions, there is no clear algorithm for management of focal pancreatic lesions...
April 17, 2017: Cochrane Database of Systematic Reviews
https://www.readbyqxmd.com/read/28414118/comparing-existing-classifications-of-fistula-in-ano-in-440-operated-patients-is-it-time-for-a-new-classification
#16
Pankaj Garg
BACKGROUND: Fistula-in-ano are classified so as to grade them according to increasing complexity which can help guide their management. The classifications used are Parks, St James Hospital University (SJHU) and Standard Practice Task Force (SPTF). Laying open (fistulotomy) of the fistula tract is the most commonly done procedure for fistula-in-ano and has high success rate. The lower grade fistulas are supposed to have low risk of incontinence when laid open and vice-versa. The objective of the study was to evaluate the efficacy of the existing classifications...
April 13, 2017: International Journal of Surgery
https://www.readbyqxmd.com/read/28413258/fluorinated-polyurethane-scaffolds-for-19-f-magnetic-resonance-imaging
#17
Twan Lammers, Marianne E Mertens, Philipp Schuster, Khosrow Rahimi, Yang Shi, Volkmar Schulz, Alexander J C Kuehne, Stefan Jockenhoevel, Fabian Kiessling
Polymers are increasingly employed in implant materials. To reduce the incidence of complications, which in the case of vascular grafts include incorrect placement and restenosis, materials are needed which allow for image-guided implantation, as well as for accurate and efficient postoperative implant imaging. We here describe amorphous fluorinated polymers based on thermoplastic polyurethane ((19)F-TPU), and show that are useful starting materials for developing tissue-engineered vascular grafts which can be detected using (19)F MRI...
April 11, 2017: Chemistry of Materials: a Publication of the American Chemical Society
https://www.readbyqxmd.com/read/28412225/enhancing-tissue-permeability-with-mri-guided-preclinical-focused-ultrasound-system-in-rabbit-muscle-from-normal-tissue-to-vx2-tumor
#18
Yao Sun, Xiaobing Xiong, Darpan Pandya, Youngkyoo Jung, Akiva Mintz, Satoru Hayasaka, Thaddeus J Wadas, King C P Li
High Intensity Focused Ultrasound (HIFU) is an emerging noninvasive, nonionizing physical energy based modality to ablate solid tumors with high power, or increase local permeability in tissues/tumors in pulsed mode with relatively low power. Compared with traditional ablative HIFU, nondestructive pulsed HIFU (pHIFU) is present in the majority of novel applications recently developed for enhancing the delivery of drugs and genes. Previous studies have demonstrated the capability of pHIFU to change tissue local permeability for enhanced drug delivery in both mouse tumors and mouse muscle...
April 12, 2017: Journal of Controlled Release: Official Journal of the Controlled Release Society
https://www.readbyqxmd.com/read/28409723/role-of-electrophysiology-in-guiding-near-total-resection-for-preservation-of-facial-nerve-function-in-the-surgical-treatment-of-large-vestibular-schwannomas
#19
Daniele Bernardeschi, Nadya Pyatigorskaya, Antoine Vanier, Franck Bielle, Mustapha Smail, Georges Lamas, Olivier Sterkers, Michel Kalamarides
OBJECTIVE In large vestibular schwannoma (VS) surgery, the facial nerve (FN) is at high risk of injury. Near-total resection has been advocated in the case of difficult facial nerve dissection, but the amount of residual tumor that should be left and when dissection should be stopped remain controversial factors. The objective of this study was to report FN outcome and radiological results in patients undergoing near-total VS resection guided by electromyographic supramaximal stimulation of the FN at the brainstem...
April 14, 2017: Journal of Neurosurgery
https://www.readbyqxmd.com/read/28409355/percutaneous-mr-guided-focal-cryoablation-for-recurrent-prostate-cancer-following-radiation-therapy-retrospective-analysis-of-iceball-margins-and-outcomes
#20
Christiaan G Overduin, Sjoerd F M Jenniskens, J P Michiel Sedelaar, Joyce G R Bomers, Jurgen J Fütterer
OBJECTIVES: To evaluate iceball margins after magnetic resonance (MR)-guided focal salvage prostate cryoablation and determine the correlation with local outcome. METHODS: A retrospective review was performed on 47 patients that underwent percutaneous MR-guided focal cryoablation for biopsy-proven locally recurrent prostate cancer after primary radiotherapy. Preprocedural diagnostic and intraprocedural MR images were analysed to derive three-directional iceball margins...
April 13, 2017: European Radiology
keyword
keyword
43392
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"