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Iron overload MRI

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https://www.readbyqxmd.com/read/28224171/assessment-of-liver-iron-overload-by-3%C3%A2-t-mri
#1
A Paisant, A Boulic, E Bardou-Jacquet, E Bannier, G d'Assignies, F Lainé, B Turlin, Y Gandon
PURPOSE: To evaluate the performance and limitations of the signal intensity ratio method for quantifying liver iron overload at 3 T. METHODS: Institutional review board approval and written informed consent from all participants were obtained. One hundred and five patients were included prospectively. All patients underwent a liver biopsy with biochemical assessment of hepatic iron concentration and a 3 T MRI scan with 5 breath-hold single-echo gradient-echo sequences...
February 21, 2017: Abdominal Radiology
https://www.readbyqxmd.com/read/28218005/evaluation-of-cardiac-and-hepatic-iron-overload-in-thalassemia-major-patients-with-t2-magnetic-resonance-imaging
#2
Pustika Amalia Wahidiyat, Felix Liauw, Damayanti Sekarsari, Siti Ayu Putriasih, Vasili Berdoukas, Dudley J Pennell
OBJECTIVES: Recent advancements have promoted the use of T2* magnetic resonance imaging (MRI) in the non-invasive detection of iron overload in various organs for thalassemia major patients. This study aims to determine the iron load in the heart and liver of patients with thalassemia major using T2* MRI and to evaluate its correlation with serum ferritin level and iron chelation therapy. METHODS: This cross-sectional study included 162 subjects diagnosed with thalassemia major, who were classified into acceptable, mild, moderate, or severe cardiac and hepatic iron overload following their T2* MRI results, respectively, and these were correlated to their serum ferritin levels and iron chelation therapy...
February 20, 2017: Hematology (Amsterdam, Netherlands)
https://www.readbyqxmd.com/read/28159390/sickle-cell-disease
#3
REVIEW
Russell E Ware, Mariane de Montalembert, Léon Tshilolo, Miguel R Abboud
Sickle cell disease is a common and life-threatening haematological disorder that affects millions of people worldwide. Abnormal sickle-shaped erythrocytes disrupt blood flow in small vessels, and this vaso-occlusion leads to distal tissue ischaemia and inflammation, with symptoms defining the acute painful sickle-cell crisis. Repeated sickling and ongoing haemolytic anaemia, even when subclinical, lead to parenchymal injury and chronic organ damage, causing substantial morbidity and early mortality. Currently available treatments are limited to transfusions and hydroxycarbamide, although stem cell transplantation might be a potentially curative therapy...
January 31, 2017: Lancet
https://www.readbyqxmd.com/read/28124030/signal-intensity-ratio-mri-accurately-estimates-hepatic-iron-load-in-hemodialysis-patients
#4
Guy Rostoker, Mireille Laroudie, Raphaël Blanc, Bernard Galet, Clémentine Rabaté, Mireille Griuncelli, Yves Cohen
BACKGROUND: Iron overload, diagnosed by means of magnetic resonance imaging (MRI), is an increasingly recognized disorder in hemodialysis patients. Specific MRI protocols have been shown to provide a reliable estimation of tissue iron content in non-renal patient populations but have not been validated in dialysis patients. Such validation studies require liver biopsy for histological comparison, but this invasive and risky procedure raises ethical concerns, especially regarding frail patients with end-stage renal disease...
January 2017: Heliyon
https://www.readbyqxmd.com/read/28111930/hfe-gene-mutation-is-a-risk-factor-for-tissue-iron-accumulation-in-hemodialysis-patients
#5
Ercan Turkmen, Tolga Yildirim, Rahmi Yilmaz, Tuncay Hazirolan, Gonca Eldem, Engin Yilmaz, Aysun Aybal Kutlugun, Mahmut Altindal, Bulent Altun
INTRODUCTION: HFE gene mutations are responsible from iron overload in general population. Studies in hemodialysis patients investigated the effect of presence of HFE gene mutations on serum ferritin and transferrin saturation (TSAT) with conflicting results. However effect of HFE mutations on iron overload in hemodialysis patients was not previously extensively studied. METHODS: 36 hemodialysis patients (age 51.3 ± 15.6, (18/18) male/female) and 44 healthy control subjects included in this cross sectional study...
January 23, 2017: Hemodialysis International
https://www.readbyqxmd.com/read/28110367/accurate-simultaneous-quantification-of-liver-steatosis-and-iron-overload-in-diffuse-liver-diseases-with-mri
#6
Manuela França, Ángel Alberich-Bayarri, Luis Martí-Bonmatí, Pedro Oliveira, Francisca Emanuel Costa, Graça Porto, José Ramón Vizcaíno, Javier Sanchez Gonzalez, Eduardo Ribeiro, João Oliveira, Helena Pessegueiro Miranda
PURPOSE: To evaluate the diagnostic performances of 3 Tesla multi-echo chemical shift-encoded gradient echo magnetic resonance (MECSE-MR) imaging to simultaneously quantify liver steatosis and iron overload in a wide spectrum of diffuse liver diseases having biopsy as reference standard. METHODS: MECSE-MR-acquired images were used to calculate fat fraction and iron content in a single breath-hold in 109 adult patients. Proton density fat fraction (PDFF) was prospectively estimated using complex-based data reconstruction with multipeak fat modeling...
January 21, 2017: Abdominal Radiology
https://www.readbyqxmd.com/read/28101313/a-young-adult-with-unintended-acute-intravenous-iron-intoxication-treated-with-oral-chelation-the-use-of-liver-ferriscan-for-diagnosing-and-monitoring-tissue-iron-load
#7
Mohamed Yassin, Ashraf T Soliman, Vincenzo De Sanctis, Abbas Moustafa, Sandra Abou Samaan, Abdulqadir Nashwan
Acute iron intoxication (FeI) in humans has not been adequately studied. The manifestation of FeI, defined as a serum iron concentration >300 μg/dL (55 μmol/L) within 12 hours of ingestion, include various symptoms appearing in progressive stages. Systemic toxicity is expected with an intake of 60 mg/kg. A 27-year-old female nurse presented with unintended acute intravenous iron intoxication (FeI) a week after self-injecting herself with 20 ampoules of IV iron (4,000 mg elemental iron, 60 mg/kg). She had stable vital signs and mild hepatic tenderness...
2017: Mediterranean Journal of Hematology and Infectious Diseases
https://www.readbyqxmd.com/read/28092939/for-better-or-worse-iron-overload-by-superparamagnetic-iron-oxide-nanoparticles-as-a-mri-contrast-agent-for-chronic-liver-diseases
#8
Qibing Zhou, Yushuang Wei
Superparamagnetic iron oxide nanoparticles (SPIONs) have recently been used as an effective magnetic resonance imaging (MRI) contrast agent for the noninvasive diagnosis of chronic liver diseases including nonalcohol fatty liver diseases, nonalcohol steatohepatitis, and cirrhosis as well as liver tumors. However, the potential risk of the iron overload by SPIONs has been highly underestimated in chronic liver diseases. While most of SPIONs have been shown safe in the healthy group, significant toxicity potential by the iron overload has been revealed through immunotoxicity, lipid peroxidation, and fatty acid and cholesterol metabolism in cirrhosis as a high risk factor...
January 17, 2017: Chemical Research in Toxicology
https://www.readbyqxmd.com/read/28090666/quantitative-ultrashort-echo-time-imaging-for-assessment-of-massive-iron-overload-at-1-5-and-3-tesla
#9
Axel J Krafft, Ralf B Loeffler, Ruitian Song, Aaryani Tipirneni-Sajja, M Beth McCarville, Matthew D Robson, Jane S Hankins, Claudia M Hillenbrand
PURPOSE: Hepatic iron content (HIC) quantification via transverse relaxation rate (R2*)-MRI using multi-gradient echo (mGRE) imaging is compromised toward high HIC or at higher fields due to the rapid signal decay. Our study aims at presenting an optimized 2D ultrashort echo time (UTE) sequence for R2* quantification to overcome these limitations. METHODS: Two-dimensional UTE imaging was realized via half-pulse excitation and radial center-out sampling. The sequence includes chemically selective saturation pulses to reduce streaking artifacts from subcutaneous fat, and spatial saturation (sSAT) bands to suppress out-of-slice signals...
January 16, 2017: Magnetic Resonance in Medicine: Official Journal of the Society of Magnetic Resonance in Medicine
https://www.readbyqxmd.com/read/28063856/effectiveness-of-deferoxamine-on-ferric-chloride-induced-epilepsy-in-rats
#10
Xiang Zou, Shize Jiang, Zehan Wu, Yimin Shi, Shengyong Cai, Renqing Zhu, Liang Chen
Iron overload has been regarded as a common cause for refractory epilepsies in patients after hemorrhagic strokes. This study is to examine the potential epilepsy control effect of deferoxamine (DFO), an iron chelator, on a ferric chloride-induced epilepsy rat model. Twenty four rats were divided into 4 groups: group I is blank control group, group II is sham group with intracortical injection of saline, group III is epilepsy group with intracortical injection of iron and saline treatment, group IV is treatment group with intracortical injection of iron and DFO treatment...
January 4, 2017: Brain Research
https://www.readbyqxmd.com/read/27956374/current-review-of-iron-overload-and-related-complications-in-hematopoietic-stem-cell-transplantation
#11
Erden Atilla, Selami K Toprak, Taner Demirer
Iron overload is an adverse prognostic factor for patients undergoing hematopoietic stem cell transplantation (HSCT). In HSCT setting, pretransplant and early posttransplant ferritin and transferrin saturation were found to be highly elevated due to high transfusion requirements. In addition to that, post-HSCT iron overload had shown to be related with infections, hepatic sinusoidal obstruction syndrome (SOS), mucositis, liver dysfunction and acute GVHD. Hyperferritinemia causes decreased survival rates in both pre and post transplant setting...
December 12, 2016: Turkish Journal of Haematology: Official Journal of Turkish Society of Haematology
https://www.readbyqxmd.com/read/27937040/multiparametric-or-practical-quantitative-liver-mri-towards-millisecond-fat-fraction-kilopascal-and-function-era
#12
Emre Unal, Ilkay Sedakat Idilman, Muşturay Karçaaltıncaba
New advances in liver magnetic resonance imaging (MRI) may enable diagnosis of unseen pathologies by conventional techniques. Normal T1 (550-620 ms for 1.5 T and 700-850 ms for 3 T), T2, T2* (>20 ms), T1rho (40-50 ms) mapping, proton density fat fraction (PDFF) (≤5%) and stiffness (2-3kPa) values can enable differentiation of a normal liver from chronic liver and diffuse diseases. Gd-EOB-DTPA can enable assessment of liver function by using postcontrast hepatobiliary phase or T1 reduction rate (normally above 60%)...
February 2017: Expert Review of Gastroenterology & Hepatology
https://www.readbyqxmd.com/read/27778040/modern-american-scurvy-experience-with-vitamin-c-deficiency-at-a-large-children-s-hospital
#13
Farahnaz Golriz, Lane F Donnelly, Sridevi Devaraj, Raj Krishnamurthy
BACKGROUND: Until recently scurvy has been viewed in developed countries as a disease of the past. More recently there have been reports of case series of children with scurvy who have had a delayed diagnosis after an extensive diagnostic workup that included imaging. Most of these children have had underlying neurologic conditions such as autism. OBJECTIVE: To review the medical records of children diagnosed with vitamin C (ascorbic acid) deficiency based on serum ascorbic acid levels at a large pediatric health care system, to determine imaging findings and utility of imaging in management, and to identify at-risk pediatric populations...
February 2017: Pediatric Radiology
https://www.readbyqxmd.com/read/27752732/can-multi-slice-or-navigator-gated-r2-mri-replace-single-slice-breath-hold-acquisition-for-hepatic-iron-quantification
#14
Ralf B Loeffler, M Beth McCarville, Anne W Wagstaff, Matthew P Smeltzer, Axel J Krafft, Ruitian Song, Jane S Hankins, Claudia M Hillenbrand
BACKGROUND: Liver R2* values calculated from multi-gradient echo (mGRE) magnetic resonance images (MRI) are strongly correlated with hepatic iron concentration (HIC) as shown in several independently derived biopsy calibration studies. These calibrations were established for axial single-slice breath-hold imaging at the location of the portal vein. Scanning in multi-slice mode makes the exam more efficient, since whole-liver coverage can be achieved with two breath-holds and the optimal slice can be selected afterward...
January 2017: Pediatric Radiology
https://www.readbyqxmd.com/read/27752513/longitudinal-profile-of-iron-accumulation-in-good-grade-subarachnoid-hemorrhage
#15
Christoph Scherfler, Alois Josef Schiefecker, Margarete Delazer, Ronny Beer, Thomas Bodner, Georg Spinka, Mario Kofler, Bettina Pfausler, Christian Kremser, Michael Schocke, Thomas Benke, Elke R Gizewski, Erich Schmutzhard, Raimund Helbok
OBJECTIVE: MRI parameters of iron concentration (R2*, transverse relaxation rate), microstructural integrity (mean diffusivity and fractional anisotropy), as well as gray and white matter volumes were analyzed in patients with subarachnoid hemorrhage (SAH) and uncomplicated clinical course to detect the evolution of brain tissue changes 3 weeks and 12 months after ictus. METHODS: MRI scans of 14 SAH patients (aneurysm of the anterior communicating artery, n = 5; no aneurysm n = 9) were compared with 14 age-matched healthy control subjects...
October 2016: Annals of Clinical and Translational Neurology
https://www.readbyqxmd.com/read/27730342/myocardial-and-liver-iron-overload-assessed-using-t2-magnetic-resonance-imaging-with-an-excel-spreadsheet-for-post-processing-in-tunisian-thalassemia-major-patients
#16
Monia Ouederni, Monia Ben Khaled, Fethi Mellouli, Elhem Ben Fraj, Nawel Dhouib, Ismehen Ben Yakoub, Selem Abbes, Nejla Mnif, Mohamed Bejaoui
Thalassemia is a common genetic disorder in Tunisia. Early iron concentration assessment is a crucial and challenging issue. Most of annual deaths due to iron overload occurred in underdeveloped regions of the world. Limited access to liver and heart MRI monitoring might partially explain these poor prognostic results. Standard software programs are not available in Tunisia. This study is the first to evaluate iron overload in heart and liver using the MRI T2* with excel spreadsheet for post processing. Association of this MRI tool results to serum ferritin level, and echocardiography was also investigated...
January 2017: Annals of Hematology
https://www.readbyqxmd.com/read/27685251/metabolic-and-hepatic-effects-of-bloodletting-in-dysmetabolic-iron-overload-syndrome-a-randomized-controlled-study-in-274-patients
#17
Fabrice Lainé, Marc Ruivard, Véronique Loustaud-Ratti, Fabrice Bonnet, Paul Calès, Edouard Bardou-Jacquet, Sylvie Sacher-Huvelin, Xavier Causse, Christine Beusnel, Alain Renault, Eric Bellissant, Yves Deugnier
: Dysmetabolic iron overload syndrome (DIOS) is a common cause of hyperferritinemia, accounting for a mild increase of iron stores in insulin-resistant subjects. Iron removal could improve insulin sensitivity. We performed a prospective, randomized, controlled trial (NCT01015525) in nondiabetic DIOS patients with hepatic iron >50 μmol/g at magnetic resonance imaging to compare the metabolic and hepatic outcomes of 1-year maintenance of serum ferritin levels <50 μg/L by bloodletting associated with lifestyle and diet advice (LFDA) to those of LFDA only...
February 2017: Hepatology: Official Journal of the American Association for the Study of Liver Diseases
https://www.readbyqxmd.com/read/27684730/labile-plasma-iron-more-practical-and-more-sensitive-to-iron-overload-in-myelodysplastic-syndromes
#18
Shucheng Gu, Yanjun Xv, Chengming Fei, Chao Xiao, Juan Guo, Youshan Zhao, Feng Xv, Xiao Li, Chunkang Chang
OBJECTIVES: In order to gain an insight into labile plasma iron (LPI) in iron metabolism microenvironment in MDS. METHODS: We performed ELISA, quantitative real-time polymerase chain reaction, flow cytometry, MRI T2* assays to test LPI, iron biochemical parameters, and liver iron concentration (LIC) among 22 MDS patients. RESULTS: LPI has a statistical difference (P < 0.001 by analysis of variance (ANOVA)), which decreased gradually, among three groups, while no difference was found in adjusted serum ferritin (ASF) (P = 0...
January 2017: Hematology (Amsterdam, Netherlands)
https://www.readbyqxmd.com/read/27650324/comparison-of-tissue-elastography-with-magnetic-resonance-imaging-t2-and-serum-ferritin-quantification-in-detecting-liver-iron-overload-in-patients-with-thalassemia-major
#19
Nirav Pipaliya, Dattatray Solanke, Pathik Parikh, Meghraj Ingle, Ratna Sharma, Sujata Sharma, Prabha Sawant
BACKGROUND & AIMS: We investigated whether tissue elastography (TE) can be used as an alternative to magnetic resonance imaging (MRI) T2* analysis to determine the degree of iron overload in patients with thalassemia major. METHODS: We conducted a prospective study of 154 patients (99 male; mean age, 12 ± 3.6 years) with thalassemia major requiring chronic blood transfusion and on iron chelator therapy. The study was performed at a tertiary hospital in India from January 2015 through June 2015...
September 17, 2016: Clinical Gastroenterology and Hepatology
https://www.readbyqxmd.com/read/27617076/detection-of-early-right-ventricular-dysfunction-in-young-patients-with-thalassemia-major-using-tissue-doppler-imaging
#20
Helen Bornaun, Reyhan Dedeoglu, Kazim Oztarhan, Savas Dedeoglu, Erkan Erfidan, Muge Gundogdu, Gonul Aydogan, Dicle Cengiz
BACKGROUND: Myocardial iron overload is the most common cause of mortality in patients with thalassemia major (TM), also known as beta-thalassemia. T2* cardiovascular magnetic resonance imaging (MRI) is the best way of monitoring cardiac iron, and new echocardiographic techniques can be used to assess cardiac function. OBJECTIVES: The aim of this study was to assess the systolic and diastolic right ventricular (RV) function of patients with TM using tissue Doppler imaging (TDI) and to determine whether this echocardiographic technique is an adequate diagnostic tool for the screening and detection of subclinical cardiac dysfunction...
June 2016: Iranian Journal of Pediatrics
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