keyword
MENU ▼
Read by QxMD icon Read
search

Dynamic contrast imaging

keyword
https://www.readbyqxmd.com/read/28528264/baseline-and-longitudinal-variability-of-normal-tissue-uptake-values-of-18-f-fluorothymidine-pet-images
#1
Matthijs C F Cysouw, Gerbrand M Kramer, Virginie Frings, Adrianus J De Langen, Mariëlle J Wondergem, Laura M Kenny, Eric O Aboagye, Carsten Kobe, Jürgen Wolf, Otto S Hoekstra, Ronald Boellaard
PURPOSE: [(18)F]-fluorothymidine ([(18)F]-FLT) is a PET-tracer enabling in-vivo visualization and quantification of tumor cell proliferation. For qualitative and quantitative analysis, adequate knowledge of normal tissue uptake is indispensable. This study aimed to quantitatively investigate baseline tracer uptake of blood pool, lung, liver and bone marrow and their precision, and to assess the longitudinal effect of systemic treatment on biodistribution. METHODS: (18)F-FLT-PET(/CT) scans (dynamic or static) of 90 treatment-naïve oncological patients were retrospectively evaluated...
May 10, 2017: Nuclear Medicine and Biology
https://www.readbyqxmd.com/read/28527200/contrast-enhanced-ultrasound-ceus-in-renal-imaging-at-an-interdisciplinary-ultrasound-centre-possibilities-of-dynamic-microvascularisation-and-perfusion
#2
Franz Josef Putz, Anna Erlmeier, Isabel Wiesinger, Niklas Verloh, Christian Stroszczynski, Bernhard Banas, Ernst Michael Jung
OBJECTIVE: To identify the indications for CEUS in renal imaging in an interdisciplinary ultrasound department. METHODS: 102 CEUS examinations of the kidney in 82 patients between September 2014 and July 2016 were analysed regarding the indication for ultrasound. CEUS was performed by one experienced sonographer agent after bolus injection of 1.0 up to 2.4 ml sulphur hexafluoride microbubbles using multifrequency probes with Contrast Harmonic imaging. RESULTS: CEUS of the kidney was performed in patients from 20 to 87 years...
May 19, 2017: Clinical Hemorheology and Microcirculation
https://www.readbyqxmd.com/read/28527023/-high-resolution-manometry-of-pharyngeal-swallowing-dynamics
#3
REVIEW
M Jungheim, M Ptok
BACKGROUND: To transport a bolus from the mouth into the stomach, regular contraction of the pharyngeal muscles and a coordinated function of the upper esophageal sphincter (UES) are necessary. The muscle contraction generates intraluminal pressure, which pushes the bolus continuously forward. In contrast to imaging studies, manometric methods enable assessment of intraluminal pressure buildup and the function of the muscles involved. These methods were initially established for the esophagus and have been used increasingly in the pharynx for 7-8 years...
May 19, 2017: HNO
https://www.readbyqxmd.com/read/28526560/limb-flexion-induced-axial-compression-and-bending-in-human-femoropopliteal-artery-segments
#4
William Poulson, Alexey Kamenskiy, Andreas Seas, Paul Deegan, Carol Lomneth, Jason MacTaggart
BACKGROUND: High failure rates of femoropopliteal artery (FPA) interventions are often attributed in part to severe mechanical deformations that occur with limb movement. Axial compression and bending of the FPA likely play significant roles in FPA disease development and reconstruction failure, but these deformations are poorly characterized. The goal of this study was to quantify axial compression and bending of human FPAs that are placed in positions commonly assumed during the normal course of daily activities...
May 16, 2017: Journal of Vascular Surgery
https://www.readbyqxmd.com/read/28525448/18f-fluorocholine-pet-ct-complementing-the-role-of-dynamic-contrast-enhanced-mri-for-providing-comprehensive-diagnostic-workup-in-prostate-cancer-patients-with-suspected-relapse-following-radical-prostatectomy
#5
Shelvin Kumar Vadi, Baljinder Singh, Rajender K Basher, Ankit Watts, Ashwani K Sood, Anupam Lal, Nandita Kakkar, S K Singh
PURPOSE: The aim of this study was to compare the diagnostic performance of F-fluorocholine (FCH) PET/CT and dynamic contrast-enhanced MRI (DCE-MRI) of pelvis in restaging prostate cancer (PC) patients with biochemical recurrence (BCR) following radical prostatectomy (RP). METHODS: Twenty PC patients who had undergone RP and had BCR were recruited in this study. All the patients underwent whole-body FCH PET/CT and DCE-MRI of the pelvis. An overall pattern of recurrent disease was analyzed, and diagnostic accuracy for the detection of pelvic disease recurrence by the 2 modalities was evaluated by taking histopathologic analysis as the criterion standard...
May 19, 2017: Clinical Nuclear Medicine
https://www.readbyqxmd.com/read/28525260/three-dimensional-visualization-and-characterization-of-polymeric-self-assemblies-by-transmission-electron-microtomography
#6
Hiroshi Jinnai, Takeshi Higuchi, Xiaodong Zhuge, Akihito Kumamoto, Kees Joost Batenburg, Yuichi Ikuhara
Self-assembling structures and their dynamical processes in polymeric systems have been investigated using three-dimensional transmission electron microscopy (3D-TEM). Block copolymers (BCPs) self-assemble into nanoscale periodic structures called microphase-separated structures, a deep understanding of which is important for creating nanomaterials with superior physical properties, such as high-performance membranes with well-defined pore size and high-density data storage media. Because microphase-separated structures have become increasingly complicated with advances in precision polymerization, characterizing these complex morphologies is becoming increasingly difficult...
May 19, 2017: Accounts of Chemical Research
https://www.readbyqxmd.com/read/28524772/effects-of-stereoscopic-disparity-on-early-erp-components-during-classification-of-three-dimensional-objects
#7
Alan J Pegna, Alexandre Darque, Mark V Roberts, E Charles Leek
This study investigates the effects of stereo disparity on the perception of three-dimensional (3D) object shape. We tested the hypothesis that stereo input modulates the brain activity related to perceptual analyses of 3D shape configuration during image classification. High-density (256-channel) EEG was used to record the temporal dynamics of visual shape processing under conditions of two-dimensional (2D) and three-dimensional (3D) visual presentation. On each trial, observers made image classification judgements ('Same'/'Different') to two briefly presented, multi-part, novel objects...
May 19, 2017: Quarterly Journal of Experimental Psychology: QJEP
https://www.readbyqxmd.com/read/28524459/prognostic-role-of-conventional-and-dynamic-contrast-enhanced-mri-in-optic-pathway-gliomas
#8
Nutchawan Jittapiromsak, Ping Hou, Ho-Ling Liu, Jia Sun, John M Slopis, T Linda Chi
BACKGROUND AND PURPOSE: The natural history of optic pathway glioma (OPG) is highly variable and unpredictable. We present a pilot study of the prognostic role of conventional and dynamic contrast-enhanced magnetic resonance imaging (DCE MRI) in the evaluation of OPG. METHODS: We retrospectively reviewed 17 patients with 20 pretreatment OPG lesions who underwent conventional and DCE MRI between January 2010 and December 2016. Conventional MRI was evaluated for enhancement pattern, cystic component, optic nerve tortuosity, optic nerve dural ectasia, and optic nerve perineural thickening...
May 19, 2017: Journal of Neuroimaging: Official Journal of the American Society of Neuroimaging
https://www.readbyqxmd.com/read/28522877/dce-mri-background-parenchymal-enhancement-quantified-from-an-early-versus-delayed-post-contrast-sequence-association-with-breast-cancer-presence
#9
Shandong Wu, Margarita L Zuley, Wendie A Berg, Brenda F Kurland, Rachel C Jankowitz, Jules H Sumkin, David Gur
We investigated automated quantitative measures of background parenchymal enhancement (BPE) derived from an early versus delayed post-contrast sequence in breast dynamic contrast-enhanced magnetic resonance imaging (DCE-MRI) for association with breast cancer presence in a case-control study. DCE-MRIs were retrospectively analyzed for 51 cancer cases and 51 controls with biopsy-proven benign lesions, matched by age and year-of-MRI. BPE was quantified using fully-automated validated computer algorithms, separately from three sequential DCE-MRI post-contrast-subtracted sequences (SUB1, SUB2, and SUB3)...
May 18, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28522149/measuring-absolute-blood-perfusion-in-mice-using-dynamic-contrast-enhanced-ultrasound
#10
Abbas Shirinifard, Suresh Thiagarajan, Melissa D Johnson, Christopher Calabrese, András Sablauer
We investigated the feasibility of estimating absolute tissue blood perfusion using dynamic contrast-enhanced ultrasound (CEUS) imaging in mice. We developed a novel method of microbubble administration and a model-free approach to estimate absolute kidney perfusion, and explored the kidney as a reference organ to estimate absolute perfusion of a neuroblastoma tumor. We performed CEUS on the kidneys of CD1 nude mice using the VisualSonics VEVO 2100 imaging system. We estimated individual kidney blood perfusion using the burst-replenishment (BR) technique...
May 15, 2017: Ultrasound in Medicine & Biology
https://www.readbyqxmd.com/read/28521821/intratumoral-and-peritumoral-radiomics-for-the-pretreatment-prediction-of-pathological-complete-response-to-neoadjuvant-chemotherapy-based-on-breast-dce-mri
#11
Nathaniel M Braman, Maryam Etesami, Prateek Prasanna, Christina Dubchuk, Hannah Gilmore, Pallavi Tiwari, Donna Pletcha, Anant Madabhushi
BACKGROUND: In this study, we evaluated the ability of radiomic textural analysis of intratumoral and peritumoral regions on pretreatment breast cancer dynamic contrast-enhanced magnetic resonance imaging (DCE-MRI) to predict pathological complete response (pCR) to neoadjuvant chemotherapy (NAC). METHODS: A total of 117 patients who had received NAC were retrospectively analyzed. Within the intratumoral and peritumoral regions of T1-weighted contrast-enhanced MRI scans, a total of 99 radiomic textural features were computed at multiple phases...
May 18, 2017: Breast Cancer Research: BCR
https://www.readbyqxmd.com/read/28516571/fsoca-induced-switchable-footpad-skin-optical-clearing-window-for-blood-flow-and-cell-imaging-in%C3%A2-vivo
#12
Rui Shi, Wei Feng, Chao Zhang, Zhihong Zhang, Dan Zhu
The mouse footpad for its feature of hairlessness provides an available window for imaging vascular and cellular structure and function in vivo. Unfortunately, the strong scattering of its skin limits the penetration of light and reduces the imaging contrast and depth. Herein, an innovative footpad skin optical clearing agent (FSOCA) was developed to make the footpad skin transparent quickly by topical application. The results demonstrate that FSOCA treatment not only allowed the cutaneous blood vessels and blood flow distribution to be monitored by laser speckle contrast imaging technique with higher contrast, but also permitted the fluorescent cells to be imaged by laser scanning confocal microscopy with higher fluorescence signal intensity and larger imaging depth...
May 18, 2017: Journal of Biophotonics
https://www.readbyqxmd.com/read/28515411/evaluating-myometrial-invasion-in-endometrial-cancer-comparison-of-reduced-field-of-view-diffusion-weighted-imaging-and-dynamic-contrast-enhanced-mr-imaging
#13
Mayumi Takeuchi, Kenji Matsuzaki, Masafumi Harada
PURPOSE: To compare the diagnostic ability of reduced field-of-view (FOV) diffusion-weighted (DW) magnetic resonance (MR) imaging with that of three-dimensional (3D) dynamic contrast-enhanced (DCE) MR imaging in evaluating the depth of myometrial invasion in patients with endometrial cancer. METHODS: Three tesla (3T) MR images including T2-weighted imaging, reduced FOV DW imaging and 3D DCE MR imaging in sagittal and oblique axial (short axis) planes in 25 women with surgically proven endometrial cancer were retrospectively evaluated...
May 18, 2017: Magnetic Resonance in Medical Sciences: MRMS
https://www.readbyqxmd.com/read/28515410/differentiating-between-central-nervous-system-lymphoma-and-high-grade-glioma-using-dynamic-susceptibility-contrast-and-dynamic-contrast-enhanced-mr-imaging-with-histogram-analysis
#14
Kazuhiro Murayama, Yuya Nishiyama, Yuichi Hirose, Masato Abe, Shigeharu Ohyu, Ayako Ninomiya, Takashi Fukuba, Kazuhiro Katada, Hiroshi Toyama
PURPOSE: We evaluated the diagnostic performance of histogram analysis of data from a combination of dynamic susceptibility contrast (DSC)-magnetic resonance imaging (MRI) and dynamic contrast-enhanced (DCE)-MRI for quantitative differentiation between central nervous system lymphoma (CNSL) and high-grade glioma (HGG), with the aim of identifying useful perfusion parameters as objective radiological markers for differentiating between them. METHODS: Eight lesions with CNSLs and 15 with HGGs who underwent MRI examination, including DCE and DSC-MRI, were enrolled in our retrospective study...
May 18, 2017: Magnetic Resonance in Medical Sciences: MRMS
https://www.readbyqxmd.com/read/28515126/radiomanganese-pet-detects-changes-in-functional-%C3%AE-cell-mass-in-mouse-models-of-diabetes
#15
Reinier Hernandez, Stephen A Graves, Trillian Gregg, Halena R VanDeusen, Rachel J Fenske, Haley N Wienkes, Christopher G England, Hector F Valdovinos, Justin J Jeffery, Todd E Barnhart, Gregory W Severin, Robert J Nickles, Michelle E Kimple, Matthew J Merrins, Weibo Cai
The noninvasive measurement of functional β-cell mass would be clinically valuable for monitoring the progression of type 1 and type 2 diabetes, as well as the viability of transplanted insulin-producing cells. Although previous work employing magnetic resonance imaging has shown promise for functional β-cell mass determination through voltage-dependent Ca(2+) channel (VDCC)-mediated internalization of Mn(2+), the clinical utility of this technique is limited by the cytotoxic levels of Mn(2+) contrast agent...
May 17, 2017: Diabetes
https://www.readbyqxmd.com/read/28514950/lung-function-imaging-methods-in-cystic-fibrosis-pulmonary-disease
#16
REVIEW
Magdalena Kołodziej, Michael J de Veer, Marian Cholewa, Gary F Egan, Bruce R Thompson
Monitoring of pulmonary physiology is fundamental to the clinical management of patients with Cystic Fibrosis. The current standard clinical practise uses spirometry to assess lung function which delivers a clinically relevant functional readout of total lung function, however does not supply any visible or localised information. High Resolution Computed Tomography (HRCT) is a well-established current 'gold standard' method for monitoring lung anatomical changes in Cystic Fibrosis patients. HRCT provides excellent morphological information, however, the X-ray radiation dose can become significant if multiple scans are required to monitor chronic diseases such as cystic fibrosis...
May 17, 2017: Respiratory Research
https://www.readbyqxmd.com/read/28514212/dynamic-contrast-enhanced-mr-imaging-of-advanced-hepatocellular-carcinoma-comparison-with-the-liver-parenchyma-and-correlation-with-the-survival-of-patients-receiving-systemic-therapy
#17
Bang-Bin Chen, Chao-Yu Hsu, Chih-Wei Yu, Po-Chin Liang, Chiun Hsu, Chih-Hung Hsu, Ann-Lii Cheng, Tiffany Ting-Fang Shih
No abstract text is available yet for this article.
June 2017: Radiology
https://www.readbyqxmd.com/read/28511589/a-semi-automatic-method-for-the-extraction-of-the-portal-venous-input-function-in-quantitative-dynamic-contrast-enhanced-ct-of-the-liver
#18
Andrew B Gill, Nicholas J Hilliard, Simon T Hilliard, Martin Graves, David J Lomas, Ashley Shaw
OBJECTIVES: To aid the extraction of the portal venous input function (PVIF) from axial dynamic contrast-enhanced CT images of the liver, eliminating the need for full manual outlining of the vessel across time-points. METHODS: A cohort of 20 patients undergoing perfusion CT imaging of the liver were examined. Dynamic images of the liver were reformatted into contiguous thin slices. A region of interest (ROI) was defined within a transverse section of the portal vein on a single contrast-enhanced image...
May 16, 2017: British Journal of Radiology
https://www.readbyqxmd.com/read/28508819/128-shades-of-red-objective-remote-assessment-of-radiation-dermatitis-by-augmented-digital-skin-imaging
#19
Richard Partl, Beata Jonko, Stefan Schnidar, Michael Schöllhammer, Max Bauer, Sanchit Singh, Julia Simeckova, Kathrin Wiesner, Andreas Neubauer, Harald Schnidar
The purpose of our investigation was to develop a novel and state of the art digital skin imaging method capable for remote monitoring and objective assessment of Radiation Induced Dermatitis (RID). Therefore, radiation therapy related side effects were assessed by medical experts according to Common Terminology Criteria for Adverse Events (CTCAE) grade of severity in 20 female breast cancer patients in a clinical trial over the treatment time frame of 25-28 radiation cycles, 50.0-50.4 Gy each. Furthermore the intensity of developed skin erythema was documented by using conventional spectrophotometry plus digital skin imaging...
2017: Studies in Health Technology and Informatics
https://www.readbyqxmd.com/read/28506064/ice-melting-dynamics-the-role-of-protons-and-interfacial-geometry
#20
Andrew J Schwartz, Gerald H Pollack
The surface of ice plays a significant role in melting. To better understand the role of the surface, we studied the melting of ice using infrared imaging and pH-sensitive dyes. Ice was allowed to melt in baths of water of varying depth. When the ice melted in a high level of room-temperature water, equal to the height of the ice, the conventional melting pattern appeared. When the ice melted in a chamber with a lower water level, the melting pattern was unexpected. Seconds after the ice was placed in the water, localized regions of low temperature water appeared around the perimeter of the ice...
May 15, 2017: Langmuir: the ACS Journal of Surfaces and Colloids
keyword
keyword
74491
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"