keyword
MENU ▼
Read by QxMD icon Read
search

Multiparametric imaging

keyword
https://www.readbyqxmd.com/read/28635568/additional-value-of-magnetic-resonance-targeted-biopsies-to-standard-transrectal-ultrasound-guided-biopsies-for-detection-of-clinically-significant-prostate-cancer
#1
Catrin von Below, Cecilia Wassberg, Mona Norberg, Anna Tolf, Joel Kullberg, Sam Ladjevardi, Michael Häggman, Anna Bill Axelson, Håkan Ahlström
OBJECTIVE: The aim of this study was to evaluate the additional value of magnetic resonance imaging-targeted biopsy (MRI-TB) to standard transrectal ultrasound-guided biopsy (SB) for detection of clinically significant prostate cancer (PCa). An additional aim was to compare the biopsy results to MRI evaluation using a Likert scale. MATERIALS AND METHODS: Patients with newly diagnosed localized PCa (n = 53) by clinical routine SB were prospectively included. The majority of the patients were scheduled for curative therapy before enrollment...
February 24, 2017: Scandinavian Journal of Urology
https://www.readbyqxmd.com/read/28635336/new-advances-in-focal-therapy-for-early-stage-prostate-cancer
#2
Kae Jack Tay, Ariel A Schulman, Christina Sze, Efrat Tsivian, Thomas J Polascik
Prostate focal therapy offers men the opportunity to achieve oncological control while preserving sexual and urinary function. The prerequisites for successful focal therapy are to accurately identify, localize and completely ablate the clinically significant cancer(s) within the prostate. We aim to evaluate the evidence for current and upcoming technologies that could shape the future of prostate cancer focal therapy in the next five years. Areas Covered: Current literature on advances in patient selection using imaging, biopsy and biomarkers, ablation techniques and adjuvant treatments for focal therapy are summarized...
June 21, 2017: Expert Review of Anticancer Therapy
https://www.readbyqxmd.com/read/28632688/high-quality-3-dimensional-1h-magnetic-resonance-spectroscopic-imaging-of-the-prostate-without-endorectal-receive-coil-using-a-semi-laser-sequence
#3
Nassim Tayari, Isabell K Steinseifer, Kirsten M Selnæs, Tone F Bathen, Marnix C Maas, Arend Heerschap
OBJECTIVES: Inclusion of 3-dimensional H magnetic resonance spectroscopic imaging (3D-H-MRSI) in routine multiparametric MRI of the prostate requires good quality spectra and easy interpretable metabolite maps of the whole organ obtained without endorectal coil in clinically feasible acquisition times. We evaluated if a semi-LASER pulse sequence with gradient offset independent adiabaticity refocusing pulses (GOIA-sLASER) for volume selection can meet these requirements. MATERIALS AND METHODS: Thirteen patients with suspicion of prostate cancer and 1 patient known to have prostate cancer were examined at 3 T with a multichannel body-receive coil...
June 19, 2017: Investigative Radiology
https://www.readbyqxmd.com/read/28630883/detection-of-prostate-cancer-in-multiparametric-mri-using-random-forest-with-instance-weighting
#4
Nathan Lay, Yohannes Tsehay, Matthew D Greer, Baris Turkbey, Jin Tae Kwak, Peter L Choyke, Peter Pinto, Bradford J Wood, Ronald M Summers
A prostate computer-aided diagnosis (CAD) based on random forest to detect prostate cancer using a combination of spatial, intensity, and texture features extracted from three sequences, T2W, ADC, and B2000 images, is proposed. The random forest training considers instance-level weighting for equal treatment of small and large cancerous lesions as well as small and large prostate backgrounds. Two other approaches, based on an AutoContext pipeline intended to make better use of sequence-specific patterns, were considered...
April 2017: Journal of Medical Imaging
https://www.readbyqxmd.com/read/28630592/the-role-of-different-pi-rads-versions-in-prostate-multiparametric-magnetic-resonance-tomography-assessment
#5
Paulius Aliukonis, Tadas Letauta, Rūta Briedienė, Ieva Naruševičiūtė, Simona Letautienė
Background. Standardised Prostate Imaging Reporting and Data System (PI-RADS) guidelines for the assessment of prostate alterations were designed for the assessment of prostate pathology. Published by the ESUR in 2012, PI-RADS v1 was based on the total score of different MRI sequences with subsequent calculation. PI-RADS v2 was published by the American College of Radiology in 2015 and featured different assessment criteria for prostate peripheral and transitory zones. Aim. To assess the correlations of PI-RADS v1 and PI-RADS v2 with Gleason score values and to define their predictive values of the diagnosis of prostate cancer...
2017: Acta medica Lituanica
https://www.readbyqxmd.com/read/28630234/multiparametric-model-for-penumbral-flow-prediction-in-acute-stroke
#6
Michelle Livne, Tabea Kossen, Vince I Madai, Olivier Zaro-Weber, Walter Moeller-Hartmann, Kim Mouridsen, Wolf-Dieter Heiss, Jan Sobesky
BACKGROUND AND PURPOSE: Identification of salvageable penumbra tissue by dynamic susceptibility contrast magnetic resonance imaging is a valuable tool for acute stroke patient stratification for treatment. However, prior studies have not attempted to combine the different perfusion maps into a predictive model. In this study, we established a multiparametric perfusion imaging model and cross-validated it using positron emission tomography perfusion for detection of penumbral flow. METHODS: In a retrospective analysis of 17 subacute stroke patients with consecutive magnetic resonance imaging and H2O15 positron emission tomography scans, perfusion maps of cerebral blood flow, cerebral blood volume, mean transit time, time-to-maximum, and time-to-peak were constructed and combined using a generalized linear model (GLM)...
June 19, 2017: Stroke; a Journal of Cerebral Circulation
https://www.readbyqxmd.com/read/28627984/diagnostic-accuracy-of-proton-magnetic-resonance-spectroscopy-and-perfusion-weighted-imaging-in-brain-gliomas-follow-up-a-single-institutional-experience
#7
Monica Anselmi, Alessia Catalucci, Valentina Felli, Valentina Vellucci, Alessandra Di Sibio, Giovanni Luca Gravina, Mario Di Staso, Ernesto Di Cesare, Carlo Masciocchi
Objectives The objective of this study was to evaluate whether proton magnetic resonance spectroscopy and perfusion magnetic resonance imaging (MRI) are able to increase diagnostic accuracy in the follow-up of brain gliomas, identifying the progression of disease before it becomes evident in the standard MRI; also to evaluate which of the two techniques has the best diagnostic accuracy. Methods Eighty-three patients with cerebral glioma (50 high-grade gliomas (HGGs), 33 low-grade gliomas (LGGs)) were retrospectively enrolled...
June 2017: Neuroradiology Journal
https://www.readbyqxmd.com/read/28622248/quantitative-perfusion-analysis-of-the-rectum-using-golden-angle-radial-sparse-parallel-magnetic-resonance-imaging-initial-experience-and-comparison-to-time-resolved-angiography-with-interleaved-stochastic-trajectories
#8
Ulrike I Attenberger, Jing Liu, Philipp Riffel, Johannes Budjan, Robert Grimm, Kai T Block, Stefan O Schoenberg, Xiaoying Wang, Daniel Hausmann
OBJECTIVES: Purpose of this study was to compare the quality of perfusion maps obtained from prototypical free-breathing magnetic resonance imaging (MRI) with continuous golden-angle radial sampling and iterative reconstruction (GRASP) to conventional acquisition using time-resolved angiography with interleaved stochastic trajectories (TWIST) in patients with rectal cancer. MATERIAL AND METHODS: Forty cases were included for retrospective analysis. Twenty of the patients received routine multiparametric MRI at 3 T for rectal cancer staging, including perfusion measurement with GRASP or TWIST (10 patients for each technique, including 5 prechemoradiation and 5 postchemoradiation)...
June 16, 2017: Investigative Radiology
https://www.readbyqxmd.com/read/28617154/two-kidney-one-clip-is-a-pertinent-approach-to-integrate-arterial-hypertension-in-animal-models-of-stroke-serial-magnetic-resonance-imaging-studies-of-brain-lesions-before-and-during-cerebral-ischemia
#9
Benjamin Ménard, Laurent Chazalviel, Simon Roussel, Myriam Bernaudin, Omar Touzani
Although chronic arterial hypertension (CAH) represents the major comorbid factor in stroke, it is rarely integrated in preclinical studies of stroke. The majority of those investigations employ spontaneously hypertensive rats (SHR) which display a susceptibility to ischemic damage independent of hypertension. Here, we used a renovascular model of hypertension (RH) to examine, with magnetic resonance imaging (MRI), brain alterations during the development of hypertension and after brain ischemia. We also examined whether MRI-derived parameters predict the extent of ischemia-induced brain damage...
January 1, 2017: Journal of Cerebral Blood Flow and Metabolism
https://www.readbyqxmd.com/read/28614085/a-multiparametric-approach-to-improve-upon-existing-prostate-cancer-screening-and-biopsy-recommendations
#10
Brian T Helfand, Carly A Conran, Jianfeng Xu, William J Catalona
PURPOSE OF REVIEW: To provide an overview of how genetic, serum, and urine biomarkers can help identify men at high risk for prostate cancer (PCa) and aggressive disease and men who would benefit from prostate biopsy. RECENT FINDINGS: Screening for PCa is controversial because of concerns about overdiagnosis and overtreatment of nonlife-threatening tumors. Therefore, an approach to screening that includes a detailed family history with genetic testing of risk single nucleotide polymorphisms and high-penetrance genetic variants should be considered...
June 12, 2017: Current Opinion in Urology
https://www.readbyqxmd.com/read/28607759/a-composite-measure-to-explore-visual-disability-in-primary-progressive-multiple-sclerosis
#11
Valentina Poretto, Maria Petracca, Catarina Saiote, Enricomaria Mormina, Jonathan Howard, Aaron Miller, Fred D Lublin, Matilde Inglese
BACKGROUND: Optical coherence tomography (OCT) and magnetic resonance imaging (MRI) can provide complementary information on visual system damage in multiple sclerosis (MS). OBJECTIVES: The objective of this paper is to determine whether a composite OCT/MRI score, reflecting cumulative damage along the entire visual pathway, can predict visual deficits in primary progressive multiple sclerosis (PPMS). METHODS: Twenty-five PPMS patients and 20 age-matched controls underwent neuro-ophthalmologic evaluation, spectral-domain OCT, and 3T brain MRI...
April 2017: Multiple Sclerosis Journal—Experimental, Translational and Clinical
https://www.readbyqxmd.com/read/28600027/concurrent-focal-fat-sparing-and-peritumoral-fat-sparing-in-diffuse-fatty-liver-identified-on-18f-fdg-petct-and-multiparametric-magnetic-resonance-imaging
#12
Ming Yang, Amy K Hara, Ba D Nguyen, Michael C Roarke
No abstract text is available yet for this article.
May 27, 2017: Digestive and Liver Disease
https://www.readbyqxmd.com/read/28589398/the-contemporary-role-of-multiparametric-magnetic-resonance-imaging-in-active-surveillance-for-prostate-cancer
#13
REVIEW
Ariel A Schulman, Christina Sze, Efrat Tsivian, Rajan T Gupta, Judd W Moul, Thomas J Polascik
PURPOSE OF REVIEW: Growing research supports the use of multiparametric magnetic resonance imaging (mpMRI) for the evaluation of localized prostate cancer (PCa). We highlight contemporary evidence supporting its use in active surveillance (AS). RECENT FINDINGS: The emerging approach to localized PCa favors risk-adapted screening, image-guided biopsies, and selective therapeutic interventions. mpMRI is increasingly critical to achieve each of these aims. Early evidence suggests a value of mpMRI before initial biopsy to guide fusion targeting and to rule out non-organ confined disease as well as in the initiation and serial monitoring of men on AS...
July 2017: Current Urology Reports
https://www.readbyqxmd.com/read/28585034/myocardial-perfusion-imaging-in-women-for-the-evaluation-of-stable-ischemic-heart-disease-state-of-the-evidence-and-clinical-recommendations
#14
Viviany R Taqueti, Sharmila Dorbala, David Wolinsky, Brian Abbott, Gary V Heller, Timothy M Bateman, Jennifer H Mieres, Lawrence M Phillips, Nanette K Wenger, Leslee J Shaw
This document from the American Society of Nuclear Cardiology represents an updated consensus statement on the evidence base of stress myocardial perfusion imaging (MPI), emphasizing new developments in single-photon emission tomography (SPECT) and positron emission tomography (PET) in the clinical evaluation of women presenting with symptoms of stable ischemic heart disease (SIHD). The clinical evaluation of symptomatic women is challenging due to their varying clinical presentation, clinical risk factor burden, high degree of comorbidity, and increased risk of major ischemic heart disease events...
June 5, 2017: Journal of Nuclear Cardiology: Official Publication of the American Society of Nuclear Cardiology
https://www.readbyqxmd.com/read/28583630/evaluating-the-effect-of-rectal-distension-on-prostate-multiparametric-mri-image-quality
#15
Iztok Caglic, Nienke L Hansen, Rhys A Slough, Andrew J Patterson, Tristan Barrett
PURPOSE: To evaluate the effect of rectal distension on the quality of anatomical and functional prostate multiparametric (mp) MRI. MATERIALS AND METHODS: Multiparametric (mp) 3T-MRI images of 173 patients were independently evaluated by two radiologists in this retrospective study. Planimetry rectal volumes were derived and a subjective assessment of rectal distension was made using a 5-point Likert scale (1=no stool/gas, 5=large amount of stool/gas). Image quality of diffusion-weighted imaging (DWI) was evaluated using a 5-point Likert scale...
May 2017: European Journal of Radiology
https://www.readbyqxmd.com/read/28582632/prostate-cancer-a-correlative-study-of-multiparametric-mr-imaging-and-digital-histopathology
#16
Jin Tae Kwak, Sandeep Sankineni, Sheng Xu, Baris Turkbey, Peter L Choyke, Peter A Pinto, Vanessa Moreno, Maria Merino, Bradford J Wood
Purpose To correlate multiparametric magnetic resonance (MR) imaging and quantitative digital histopathologic analysis (DHA) of the prostate. Materials and Methods This retrospective study was approved by the local institutional review board and was HIPAA compliant. Forty patients (median age, 60 years; age range, 44-71 years) who underwent prostate MR imaging consisting of T2-weighted and diffusion-weighted (DW) MR imaging along with subsequent robot-assisted radical prostatectomy gave informed consent to be included...
June 5, 2017: Radiology
https://www.readbyqxmd.com/read/28580659/ex-vivo-mri-evaluation-of-prostate-cancer-localization-and-margin-status-prediction-of-prostate-cancer-in-fresh-radical-prostatectomy-specimens
#17
Jan Heidkamp, Martijn Hoogenboom, Iringo E Kovacs, Andor Veltien, Arie Maat, J P Michiel Sedelaar, Christina A Hulsbergen-van de Kaa, Jurgen J Fütterer
PURPOSE: To investigate the ability of high field ex vivo magnetic resonance imaging (MRI) to localize prostate cancer (PCa) and to predict the margin status in fresh radical prostatectomy (RP) specimens using histology as the reference standard. MATERIALS AND METHODS: This Institutional Review Board (IRB)-approved study had written informed consent. Patients with biopsy-proved PCa and a diagnostic multiparametric 3T MRI examination of the prostate prior to undergoing RP were prospectively included...
June 5, 2017: Journal of Magnetic Resonance Imaging: JMRI
https://www.readbyqxmd.com/read/28570099/accuracy-and-interobserver-agreement-for-prostate-imaging-reporting-and-data-system-version-2-for-the-characterization-of-lesions-identified-on-multiparametric-mri-of-the-prostate
#18
Andrei S Purysko, Leonardo K Bittencourt, Jennifer A Bullen, Thomaz R Mostardeiro, Brian R Herts, Eric A Klein
OBJECTIVE: The objective of this study was to measure the accuracy and interobserver agreement of the Prostate Imaging Reporting and Data System, version 2 (PI-RADSv2), for the characterization of prostate lesions on multiparametric MRI. MATERIALS AND METHODS: This retrospective study included 170 men examined at a single institution between August 2014 and February 2015 on a 3-T MRI scanner. Study patients were found to have lesions concerning for prostate cancer that were targeted for MRI/transrectal ultrasound fusion biopsy...
June 1, 2017: AJR. American Journal of Roentgenology
https://www.readbyqxmd.com/read/28562080/neuroimaging-patterns-along-the-als-ftd-spectrum-a-multiparametric-imaging-study
#19
Taha Omer, Eoin Finegan, Siobhan Hutchinson, Mark Doherty, Alice Vajda, Russell L McLaughlin, Niall Pender, Orla Hardiman, Peter Bede
Frontotemporal dementia is associated with considerable clinical, genetic and pathological heterogeneity. The objective of this study is to characterise the imaging signatures of the main FTD phenotypes along the ALS-FTD spectrum. A total of 100 participants underwent comprehensive multimodal neuroimaging, genetic testing and neuropsychological evaluation. Seven patients with behavioural variant FTD (bvFTD), 11 patients with non-fluent-variant primary progressive aphasia (nfvPPA), two patients with sematic-variant primary progressive aphasia(svPPA), 10 patients with amyotrophic lateral sclerosis and FTD carrying the C9orf72 hexanucleotide repeat (C9 + ALS-FTD), 10 patients with ALS-FTD without hexanucleotide repeats (C9-ALS-FTD), 20 ALS patients without behavioural or cognitive deficits (ALSnci) and 40 healthy controls (HC) were included in a prospective quantitative neuroimaging study...
May 31, 2017: Amyotrophic Lateral Sclerosis and Frontotemporal Degeneration
https://www.readbyqxmd.com/read/28557799/repeatability-of-dose-painting-by-numbers-treatment-planning-in-prostate-cancer-radiotherapy-based-on-multiparametric-magnetic-resonance-imaging
#20
Marcel A van Schie, Peter Steenbergen, Cuong Viet Dinh, Ghazaleh Ghobadi, Petra van Houdt, Floris Pos, Stijn Heijmink, Henk van der Poel, Steffen Renisch, Torbjoern Vik, Uulke van der Heide
Dose painting by numbers (DPBN) refers to a voxel-wise prescription of radiation dose modelled from functional image characteristics, in contrast to dose painting by contours which requires delineations to define the target for dose escalation. The direct relation between functional imaging characteristics and DPBN implies that random variations in images may propagate into the dose distribution. The stability of MR-only prostate cancer treatment planning based on DPBN with respect to these variations is as yet unknown...
May 30, 2017: Physics in Medicine and Biology
keyword
keyword
60806
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"