collection
MENU ▼
Read by QxMD icon Read
search

Kidney Imaging

shared collection
99 papers 25 to 100 followers
By Isabel Acosta-Ochoa Nephrology senior staff. Valladolid. Spain
https://www.readbyqxmd.com/read/29716799/emergency-and-critical-care-applications-for-contrast-enhanced-ultrasound
#1
REVIEW
Tobias Kummer, Laura Oh, Mary Beth Phelan, Robert D Huang, Jason T Nomura, Srikar Adhikari
INTRODUCTION: Contrast-enhanced ultrasound (CEUS) using intravascular microbubbles has potential to revolutionize point-of-care ultrasonography by expanding the use of ultrasonography into clinical scenarios previously reserved for computed tomography (CT), magnetic resonance imaging, or angiography. METHODS: We performed a literature search and report clinical experience to provide an introduction to CEUS and describe its current applications for point-of-care indications...
April 22, 2018: American Journal of Emergency Medicine
https://www.readbyqxmd.com/read/29706252/gadolinium-based-contrast-agents-in-kidney-disease-comprehensive-review-and-clinical-practice-guideline-issued-by-the-canadian-association-of-radiologists
#2
REVIEW
Nicola Schieda, Jason I Blaichman, Andreu F Costa, Rafael Glikstein, Casey Hurrell, Matthew James, Pejman Jabehdar Maralani, Wael Shabana, An Tang, Anne Tsampalieros, Christian van der Pol, Swapnil Hiremath
Use of gadolinium-based contrast agents (GBCAs) in renal impairment is controversial, with physician and patient apprehension in acute kidney injury (AKI), chronic kidney disease (CKD), and dialysis because of concerns regarding nephrogenic systemic fibrosis (NSF). The position that GBCAs are absolutely contraindicated in AKI, CKD stage 4 or 5 (estimated glomerular filtration rate [eGFR] <30 mL/min/1.73 m2 ) and dialysis-dependent patients is outdated, and may limit access to clinically necessary contrast-enhanced MRI examinations...
May 2018: Canadian Association of Radiologists Journal, Journal L'Association Canadienne des Radiologistes
https://www.readbyqxmd.com/read/29691759/contrast-enhanced-ultrasonography-in-chronic-glomerulonephritides-correlation-with-histological-parameters-of-disease-activity
#3
Manuela Nestola, Nicoletta De Matthaeis, Pietro Manuel Ferraro, Paola Fuso, Stefano Costanzi, Gian Franco Zannoni, Fabrizio Pizzolante, Sabina Vasquez Quadra, Giovanni Gambaro, Gian Ludovico Rapaccini
PURPOSE: To compare contrast-enhanced ultrasonography (CEUS)-derived time-intensity (TI) curves with histological findings in kidneys of patients affected by chronic glomerulonephritides (GN) in the early stage of disease. METHODS: Research ethics committee approval and patient written informed consent were obtained. Thirty-one patients who showed clinical and laboratory signs of GN, with preserved renal function, were consecutively enrolled. They underwent kidney CEUS, from which TI curves were obtained, and kidney biopsy...
April 24, 2018: Journal of Ultrasound
https://www.readbyqxmd.com/read/29606399/intravital-phosphorescence-lifetime-imaging-of-the-renal-cortex-accurately-measures-renal-hypoxia
#4
Yosuke Hirakawa, Kiichi Mizukami, Toshitada Yoshihara, Ippei Takahashi, Purevsuren Khulan, Tomoko Honda, Imari Mimura, Tetsuhiro Tanaka, Seiji Tobita, Masaomi Nangaku
Renal tubulointerstitial hypoxia is recognized as a final common pathway of chronic kidney disease and is considered a promising drug target. However, hypoxia in the tubules is not well examined because of limited detection methods. Here, we devised a method to visualize renal tubular oxygen tension with spatial resolution at a cellular level using the cell-penetrating phosphorescent probe, BTPDM1 (an iridium-based cationic lipophilic dye), and confocal phosphorescence lifetime imaging microscopy to precisely assess renal hypoxia...
March 30, 2018: Kidney International
https://www.readbyqxmd.com/read/29330374/predicting-fibrosis-progression-in-renal-transplant-recipients-using-laser-based-infrared-spectroscopic-imaging
#5
Vishal K Varma, Andre Kajdacsy-Balla, Sanjeev Akkina, Suman Setty, Michael J Walsh
Renal transplants have not seen a significant improvement in their 10-year graft life. Chronic damage accumulation often leads to interstitial fibrosis and tubular atrophy (IF/TA) and thus graft function loss over time. For this reason, IF/TA has been the chief suspect for a potential prognostic marker for long term outcomes. In this study, we have used infrared spectroscopic (IR) imaging to interrogate the biochemistry of regions of fibrosis from renal transplant biopsies to identify a biochemical signature that can predict rapid progression of fibrosis...
January 12, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29575113/renal-volume-assessed-by-magnetic-resonance-imaging-volumetry-correlates-with-renal-function-in-living-kidney-donors-pre-and-postdonation-a-retrospective-cohort-study
#6
Daniel Lange, Andreas Helck, Axel Rominger, Alexander Crispin, Bruno Meiser, Jens Werner, Michael Fischereder, Manfred Stangl, Antje Habicht
Renal function of potential living kidney donors is routinely assessed with scintigraphy. Kidney anatomy is evaluated by imaging techniques such as magnetic resonance imaging (MRI). We evaluated if a MRI-based renal volumetry is a good predictor of kidney function pre- and postdonation. We retrospectively analyzed the renal volume (RV) in a MRI of 100 living kidney donors. RV was correlated with the tubular excretion rate (TER) of MAG3-scintigraphy, a measured creatinine clearance (CrCl), and the estimated glomerular filtration rate (eGFR) by Cockcroft-Gault (CG), CKD-EPI, and modification of diet in renal disease (MDRD) formula pre- and postdonation during a follow-up of 3 years...
March 25, 2018: Transplant International: Official Journal of the European Society for Organ Transplantation
https://www.readbyqxmd.com/read/29576004/volumetric-nephrogram-represents-renal-function-and-complements-aortic-anatomic-severity-grade-in-predicting-evar-outcomes
#7
Mark D Balceniuk, Lauren Trakimas, Claudia Aghaie, Doran Mix, Khurram Rasheed, Matthew Seaman, Jennifer Ellis, Roan Glocker, Adam Doyle, Michael C Stoner
INTRODUCTION: Chronic kidney disease (CKD) is a predictor of poor outcomes for patients undergoing endovascular aortic aneurysm repair (EVAR). Anatomic severity grade (ASG) represents a quantitative mechanism for assessing anatomical suitability for endovascular aortic repair. Anatomic severity grade has been correlated with repair outcomes and resource utilization. The purpose of this study was to identify a novel renal perfusion metric as a way to assist ASG with predicting EVAR outcomes...
January 1, 2018: Vascular and Endovascular Surgery
https://www.readbyqxmd.com/read/29508011/imaging-with-ultrasound-contrast-agents-current-status-and-future
#8
REVIEW
Wui K Chong, Virginie Papadopoulou, Paul A Dayton
Microbubble ultrasound contrast agents (UCAs) were recently approved by the Food and Drug administration for non-cardiac imaging. The physical principles of UCAs, methods of administration, dosage, adverse effects, and imaging techniques both current and future are described. UCAs consist of microbubbles in suspension which strongly interact with the ultrasound beam and are readily detectable by ultrasound imaging systems. They are confined to the blood pool when administered intravenously, unlike iodinated and gadolinium contrast agents...
April 2018: Abdominal Radiology
https://www.readbyqxmd.com/read/29477241/point-of-care-ultrasound-in-the-practice-of-nephrology
#9
REVIEW
Vandana Dua Niyyar, W Charles O'Neill
Sonography is increasingly being performed by clinicians and has applications throughout the spectrum of nephrology, including acute and chronic renal failure, urinary obstruction, cystic disease, pain, hematuria, transplantation, kidney biopsy, temporary and permanent vascular access, and assessment of fluid status. The skill is relatively easily acquired, expedites patient care, and enhances the practice of nephrology. However, the lack of exposure in most training programs remains a major obstacle.
May 2018: Kidney International
https://www.readbyqxmd.com/read/29395726/renal-scintigraphy-for-post-transplant-monitoring-after-kidney-transplantation
#10
REVIEW
S Benjamens, S P Berger, A W J M Glaudemans, J S F Sanders, R A Pol, R H J A Slart
BACKGROUND: Clinicians use several diagnostic modalities to recognize post-transplant complications, such as acute tubular necrosis, acute rejection, urologic and vascular complications. Currently, there is no consensus about the best procedural approach to evaluate post-transplant renal dysfunction. Renal needle-biopsy is often required, however, this is invasive and may lead to sample errors and complications, and most clinicians prefer using one of the noninvasive diagnostic modalities...
December 29, 2017: Transplantation Reviews
https://www.readbyqxmd.com/read/29279887/regional-variation-of-computed-tomographic-imaging-in-the-united-states-and-the-risk-of-nephrectomy
#11
H Gilbert Welch, Jonathan S Skinner, Florian R Schroeck, Weiping Zhou, William C Black
Importance: While computed tomography (CT) represents a tremendous advance in diagnostic imaging, it also creates the problem of incidental detection-the identification of tumors unrelated to the clinical symptoms that initiate the test. Objective: To determine the geographic variation in the United States in CT imaging and the corresponding association with one of the most consequential sequelae of incidental detection: nephrectomy. Design, Setting, and Participants: This study is a cross-sectional analysis of age-, sex-, and race-adjusted Medicare data (January 2010-December 2014) from 306 hospital referral regions (HRRs) in the United States and includes information from 15 million fee-for-service Medicare beneficiaries age 65 to 85 years...
February 1, 2018: JAMA Internal Medicine
https://www.readbyqxmd.com/read/29193529/renal-ultrasound-and-doppler-parameters-as-markers-of-renal-function-and-histopathological-damage-in-children-with-ckd
#12
Happy Sawires, Doaa Salah, Rania Hachem, Wesam Ismail, Amr Salem, Osama Botros, Hadeel Seif
BACKGROUND: Doppler ultrasonography can be used to assess the progression of vascular (arterial sclerosis) and parenchymal (glomerular sclerosis and crescents) renal damage. The aim of this study was to evaluate the significance of some sonographic and Doppler parameters as non-invasive markers of glomerular filtration rate (GFR) and renal histopathological damage in children. METHODOLOGY: A cohort of 84 children were enrolled in a case-control study (42 with CKD stages 2-5 and 42 healthy children)...
November 30, 2017: Nephrology
https://www.readbyqxmd.com/read/29167169/cutting-edge-microangio-ct-new-dimensions-in-vascular-imaging-and-kidney-morphometry
#13
Ruslan Hlushchuk, Cédric Zubler, Sébastien Barré, Carlos Correa Shokiche, Laura Schaad, Raphael Röthlisberger, Monika Wnuk, Christoph Daniel, Oleksiy Khoma, Stefan A Tschanz, Mauricio Reyes, Valentin Djonov
In the last decades, the contrast-enhanced micro-computed tomography (micro-CT) imaging of a whole animal kidney became increasingly important. The visualization was mainly limited to middle-sized vessels. Since modern desktop micro-CT scanners provide the necessary detail resolution, we developed an approach for rapid visualization and consistent assessment of kidney vasculature and glomeruli number. This method is based on μAngiofil, a new polymerizing contrast agent with homogenous X-ray absorption, which provides continuous filling of the complete vasculature and enables correlative imaging approaches...
March 1, 2018: American Journal of Physiology. Renal Physiology
https://www.readbyqxmd.com/read/29142969/elucidation-of-renal-scars-in-children-with-vesicoureteral-reflux-using-contrast-enhanced-ultrasound-a-pilot-study
#14
David S Hains, Harris L Cohen, M Beth McCarville, Ellen E Ellison, Amy Huffman, Stacey Glass, Aslam H Qureshi, Keith R Pierce, Ashlyn L Cahill, Ashley Dixon, Noel Delos Santos
Introduction: Vesicoureteral reflux is a common disorder in children but can result in kidney scarring following acute pyelonephritis. The gold standard diagnostic to detect renal scars in children is99m Tc-dimercaptosuccinic acid (DMSA) scintigraphy. DMSA has a number of limitations including radiation exposure, need for sedation, and radiotracer supply shortages. Contrast-enhanced ultrasound (CEUS) is a technique whereby biocompatible microspheres of inert gas are administered i.v. that reflect ultrasonography sound waves and do not involve radiation...
May 2017: KI Reports
https://www.readbyqxmd.com/read/29104734/monitoring-kidney-microanatomy-changes-during-ischemia-reperfusion-process-using-texture-analysis-of-oct-images
#15
Zhifang Li, Qinggong Tang, Lili Jin, Peter M Andrews, Yu Chen
kidney ischemia-reperfusion (I/R) accounts for the majority of acute kidney injury cases, whose consequences are commonly encountered after kidney transplantation. Optical coherence tomography (OCT) has been applied to image changes in kidney microanatomy and microcirculation. In this paper, we demonstrate a quantitative method for monitoring kidney status during ischemia-reperfusion process using texture properties of OCT images. This approach employs skewness to measure the distribution of en face OCT image intensities at different depths, thus allowing differentiating ischemia-reperfusion status of kidney...
April 2017: IEEE Photonics Journal
https://www.readbyqxmd.com/read/29092847/measuring-rat-kidney-glomerular-number-and-size-in-vivo-with-mri
#16
Edwin J Baldelomar, Jennifer R Charlton, Scott C Beeman, Kevin M Bennett
number is highly variable in humans and is thought to play an important role in renal health. Chronic kidney disease (CKD) is the result of too few nephrons to maintain homeostasis. Currently, nephron number can only be determined invasively or as a terminal assessment. Due to a lack of tools to measure and track nephron number in the living, the early stages of CKD often go unrecognized, preventing early intervention that might halt the progression of CKD. In this work, we present a technique to directly measure glomerular number ( Nglom ) and volume in vivo in the rat kidney ( n = 8) using MRI enhanced with the novel contrast agent cationized ferritin (CFE-MRI)...
March 1, 2018: American Journal of Physiology. Renal Physiology
https://www.readbyqxmd.com/read/29047410/association-between-kidney-intracapsular-pressure-and-ultrasound-elastography
#17
Kianoush B Kashani, Shennen A Mao, Sami Safadi, Bruce P Amiot, Jaime M Glorioso, John C Lieske, Scott L Nyberg, Xiaoming Zhang
BACKGROUND: Kidney congestion is a common pathophysiologic pathway of acute kidney injury (AKI) in sepsis and heart failure. There is no noninvasive tool to measure kidney intracapsular pressure (KIP) directly. METHODS: We evaluated the correlation of KIP with kidney elasticity measured by ultrasound surface wave elastography (USWE). We directly measured transcatheter KIP in three pigs at baseline and after bolus infusion of normal saline, norepinephrine, vasopressin, dopamine, and fenoldopam; infiltration of 2-L peritoneal dialysis solution in the intra-abdominal space; and venous, arterial, and ureteral clamping...
October 19, 2017: Critical Care: the Official Journal of the Critical Care Forum
https://www.readbyqxmd.com/read/28931522/three-dimensional-morphometric-analysis-of-the-renal-vasculature
#18
Zohaib Khan, Jennifer P Ngo, Bianca Le, Roger G Evans, James Todd Pearson, Bruce S Gardiner, David W Smith
Vascular topology and morphology is critical in the regulation of blood flow and the transport of small solutes including oxygen, carbon dioxide, nitric oxide and hydrogen sulfide. Renal vascular morphology is particularly challenging as many arterial walls are partially wrapped by the walls of veins. In the absence of a precise characterization of three-dimensional branching vascular geometry, accurate computational modeling of the intrarenal transport of small diffusible molecules is impossible. An enormous manual effort was required to achieve a relatively precise characterization of rat renal vascular geometry, highlighting the need for an automated method for analysis of branched vasculature morphology to allow characterization of the renal vascular geometry of other species, including humans...
September 20, 2017: American Journal of Physiology. Renal Physiology
https://www.readbyqxmd.com/read/28877041/sodium-mri-a-new-frontier-in-imaging-in-nephrology
#19
REVIEW
Susan Francis, Charlotte E Buchanan, Ben Prestwich, Maarten W Taal
PURPOSE OF REVIEW: This review focuses on the recent technological advances in quantitative sodium (Na) MRI to provide a noninvasive measure of tissue viability for use in clinical studies of patients with kidney disease. Na MRI is the only noninvasive imaging technique that allows for the absolute spatial quantification of tissue sodium concentration (TSC), providing assessment of the corticomedullary sodium gradient (CMSG) in the kidney, and allowing measures of TSC in the skin and muscle...
November 2017: Current Opinion in Nephrology and Hypertension
https://www.readbyqxmd.com/read/28750926/label-free-molecular-imaging-of-the-kidney
#20
REVIEW
Boone M Prentice, Richard M Caprioli, Vincent Vuiblet
In this review, we will highlight technologies that enable scientists to study the molecular characteristics of tissues and/or cells without the need for antibodies or other labeling techniques. Specifically, we will focus on matrix-assisted laser desorption/ionization imaging mass spectrometry, infrared spectroscopy, and Raman spectroscopy.
September 2017: Kidney International
label_collection
label_collection
2933
1
2
2017-08-23 06:28:36
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"