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Whole-body mri

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https://www.readbyqxmd.com/read/29779243/co-occurrence-of-schwannomatosis-and-rhabdoid-tumor-predisposition-syndrome-1
#1
Hildegard Kehrer-Sawatzki, Uwe Kordes, Simone Seiffert, Anna Summerer, Christian Hagel, Ulrich Schüller, Said Farschtschi, Reinhard Schneppenheim, Martin Bendszus, Tim Godel, Victor-Felix Mautner
BACKGROUND: The clinical phenotype associated with germline SMARCB1 mutations has as yet not been fully documented. It is known that germline SMARCB1 mutations may cause rhabdoid tumor predisposition syndrome (RTPS1) or schwannomatosis. However, the co-occurrence of rhabdoid tumor and schwannomas in the same patient has not so far been reported. METHODS: We investigated a family with members harboring a germline SMARCB1 deletion by means of whole-body MRI as well as high-resolution microstructural magnetic resonance neurography (MRN)...
May 20, 2018: Molecular Genetics & Genomic Medicine
https://www.readbyqxmd.com/read/29766311/monitoring-scanner-calibration-using-the-image-derived-arterial-blood-suv-in-whole-body-fdg-pet
#2
Jens Maus, Frank Hofheinz, Ivayla Apostolova, Michael C Kreissl, Jörg Kotzerke, Jörg van den Hoff
BACKGROUND: The current de facto standard for quantification of tumor metabolism in oncological whole-body PET is the standardized uptake value (SUV) approach. SUV determination requires accurate scanner calibration. Residual inaccuracies of the calibration lead to biased SUV values. Especially, this can adversely affect multicenter trials where it is difficult to ensure reliable cross-calibration across participating sites. The goal of the present work was the evaluation of a new method for monitoring scanner calibration utilizing the image-derived arterial blood SUV (BSUV) averaged over a sufficiently large number of whole-body FDG-PET investigations...
May 15, 2018: EJNMMI Research
https://www.readbyqxmd.com/read/29759148/minimal-residual-disease-in-multiple-myeloma-use-of-magnetic-resonance-imaging
#3
REVIEW
Jens Hillengass, Maximilian Merz, Stefan Delorme
The increasing percentage of patients achieving deep responses in multiple myeloma has led to the need for more sophisticated instruments to measure residual disease as a potential source of relapse. As minimal residual disease assessment is mostly performed on a bone marrow specimen from a certain area of the body, such samples have the limitation that they might not really represent the actual tumor burden, because focal accumulations of malignant cells might be either hit or missed. Magnetic resonance imaging is a highly sensitive technique for the assessment of tumor burden and can be performed as whole-body protocol, overcoming the problem of sampling error for minimal residual disease assessment...
January 2018: Seminars in Hematology
https://www.readbyqxmd.com/read/29758089/current-commercial-techniques-for-mri-guided-attenuation-correction-are-insufficient-and-will-limit-the-wider-acceptance-of-pet-mri-technology-in-the-clinic
#4
Ciprian Catana, Harald H Quick, Habib Zaidi
Whole-body hybrid PET/MR imaging has been used since its introduction in 2010 in clinical and research settings for diagnosis, staging and restaging, assessment of response to treatment and radiation therapy planning. However, the quantitative potential of PET/MRI is challenged by the lack of reliable and accurate MRI-guided attenuation correction (MRAC) owing to the lack of direct relationship between MRI signal, reflecting proton density and relaxation time properties, and electron density, which is linked to photon attenuation properties of biological tissues...
May 14, 2018: Medical Physics
https://www.readbyqxmd.com/read/29750890/impact-of-age-on-disease-progression-and-microenvironment-in-oral-cancer
#5
V K Vincent-Chong, H DeJong, L J Rich, A Patti, M Merzianu, P A Hershberger, M Seshadri
Despite the recognized link between aging and cancer, most preclinical studies in experimental tumor models are conducted with 6- to 8-wk-old rodents. The goal of the present study was to examine the impact of age on tumor incidence, growth, and microenvironmental characteristics in mouse models of head and neck squamous cell carcinoma (HNSCC). Experimental studies were conducted with the 4-nitroquinoline-oxide (4NQO) oral carcinogenesis model and orthotopic FaDu HNSCC xenografts, established in young (7 to 12 wk of age) and old (65 to 70 wk of age) female C57BL/6 mice ( n = 44; 4NQO model) and severe combined immunodeficient mice ( n = 13; HNSCC xenografts)...
May 1, 2018: Journal of Dental Research
https://www.readbyqxmd.com/read/29744918/retrospective-analysis-of-rf-heating-measurements-of-passive-medical-implants
#6
Ting Song, Zhiheng Xu, Maria Ida Iacono, Leonardo M Angelone, Sunder Rajan
PURPOSE: The test reports for the RF-induced heating of metallic devices of hundreds of medical implants have been provided to the U.S. Food and Drug Administration as a part of premarket submissions. The main purpose of this study is to perform a retrospective analysis of the RF-induced heating data provided in the reports to analyze the trends and correlate them with implant geometric characteristics. METHODS: The ASTM-based RF heating test reports from 86 premarket U...
May 9, 2018: Magnetic Resonance in Medicine: Official Journal of the Society of Magnetic Resonance in Medicine
https://www.readbyqxmd.com/read/29743740/evaluation-of-the-fetal-abdomen-by-magnetic-resonance-imaging-part-1-malformations-of-the-abdominal-cavity
#7
Ana Paula Pinho Matos, Luciana de Barros Duarte, Pedro Teixeira Castro, Pedro Daltro, Heron Werner Júnior, Edward Araujo Júnior
Although ultrasound continues to be the mainstay modality for the evaluation of fetal disorders, fetal magnetic resonance imaging (MRI) has often been used as a valuable adjunct in recent years. The exponential growth of the use of fetal MRI has been facilitated by technological advancements such as ultrafast T2-weighted sequences and diffusion-weighted imaging. Fetal MRI can achieve results that are comparable to or better than those of ultrasound, particularly in cases of maternal obesity, severe oligohydramnios, or abnormal fetal position...
March 2018: Radiologia Brasileira
https://www.readbyqxmd.com/read/29741204/striatal-hypermetabolism-in-a-case-of-igg4-related-disease
#8
Abdelhamid Biyi, Omar Ait Sahel, Abderrahim Mejjad, Yasser Benameur, Salah Nabih Oueriagli, Abderrahim Doudouh
A 77 years-old man with lung and bone involvement of proven IgG4-related disease complained of tree month's memory deficits. Brain MRI was normal. 18F-FDG whole body PET/CT showed in addition to the bone lesions, a marked symmetrical striatal hypermetabolism in contrast with cortical hypometabolism. Despite steroid treatment, the patient's clinical status declined rapidly and he died two months later. Striatal hypermetabolism has been reported in autoimmune limbic encephalitis, but to the best of our knowledge, this is the first description in a case of IgG4-related disease...
2018: Nuclear Medicine Review. Central & Eastern Europe
https://www.readbyqxmd.com/read/29733378/assessing-the-predictability-of-idh-mutation-and-mgmt-methylation-status-in-glioma-patients-using-relaxation-compensated-multi-pool-cest-mri-at-7-0-tesla
#9
Daniel Paech, Johannes Windschuh, Johanna Oberhollenzer, Constantin Dreher, Felix Sahm, Jan-Eric Meissner, Steffen Goerke, Patrick Schuenke, Moritz Zaiss, Sebastian Regnery, Sebastian Bickelhaupt, Philipp Bäumer, Martin Bendszus, Wolfgang Wick, Andreas Unterberg, Peter Bachert, Mark Edward Ladd, Heinz-Peter Schlemmer, Alexander Radbruch
Background: Early identification of prognostic superior characteristics in glioma patients such as Isocitrate dehydrogenase(IDH)-mutation and O6-methylguanine-DNA-methyltransferase (MGMT) promotor methylation status is of great clinical importance. The study purpose was to investigate the non-invasive predictability of IDH-mutation status, MGMT promotor methylation, and differentiation of lower versus higher grade glioma (LGG vs. HGG) in newly-diagnosed patients employing relaxation-compensated multi-pool Chemical Exchange Saturation Transfer (CEST) magnetic resonance imaging (MRI) at 7...
May 4, 2018: Neuro-oncology
https://www.readbyqxmd.com/read/29732031/is-99m-tc-methylene-diphosphonate-bone-scintigraphy-a-sensitive-method-for-detecting-bone-lesions-in-multiple-myeloma
#10
Mohsen Vakili Sadeghi, Sadegh Sedaghat
Background: Bone lesion in multiple myeloma (MM) is most commonly presented as a lytic lesion in this disease. Determination of extent of bone lesions in MM is necessary to follow-up the patients. Whole body bone scan with 99m, Tc-methylene diphosphonate (MDP) has a lower sensitivity than other modalities. Methods: From the patients with MM admitted to Ayatollah Rouhani Hospital of Babol-Iran from 2009 to 2015, who had undergone whole body bone scan during diagnostic process, were entered into the study...
2018: Caspian Journal of Internal Medicine
https://www.readbyqxmd.com/read/29728519/first-in-human-pet-study-of-3-novel-tau-radiopharmaceuticals-11-c-ro6924963-11-c-ro6931643-and-18-f-ro6958948
#11
Dean F Wong, Robert Comley, Hiroto Kuwabara, Paul B Rosenberg, Susan M Resnick, Susanne Ostrowitzki, Cristina Vozzi, Frank Boess, Esther Oh, Constantine G Lyketsos, Michael Honer, Luca Gobbi, Gregory Klein, Noble George, Lorena Gapasin, Kelly Kitzmiller, Joshua Roberts, Jeff Sevigny, Ayon Nandi, James R Brasic, Chakradhar Mishra, Madhav Thambisetty, Abhay Moghekar, Anil Mathur, Marilyn Albert, Robert F Dannals, Edilio Borroni
Background: [11 C]RO-963, [11 C]RO-643 and [18 F]RO-948 (previously referred as [11 C]RO6924963, [11 C]RO6931643, and [18 F]RO6958948, respectively) have been reported as promising PET tracers for tau imaging based on in vitro and preclinical PET data (1,2). Here we describe the first human evaluation of these novel radiotracers. Methods: Amyloid PET positive Alzheimer's disease (AD) patients and young healthy subjects (YC) each received two different tau tracers. Dynamic 90 min scans were obtained after bolus injection of [11 C]RO-963, [11 C]RO-643 or [18 F]RO-948...
May 4, 2018: Journal of Nuclear Medicine: Official Publication, Society of Nuclear Medicine
https://www.readbyqxmd.com/read/29724418/acr-appropriateness-criteria-%C3%A2-pretreatment-staging-of-muscle-invasive-bladder-cancer
#12
Christian B van der Pol, V Anik Sahni, Steven C Eberhardt, Aytekin Oto, Oguz Akin, Lauren F Alexander, Brian C Allen, Fergus V Coakley, Adam T Froemming, Pat F Fulgham, Keyanoosh Hosseinzadeh, Jodi K Maranchie, Rekha N Mody, Nicola Schieda, David M Schuster, Aradhana M Venkatesan, Carolyn L Wang, Mark E Lockhart
Muscle-invasive bladder cancer (MIBC) has a tendency toward urothelial multifocality and is at risk for local and distant spread, most commonly to the lymph nodes, bone, lung, liver, and peritoneum. Pretreatment staging of MIBC should include imaging of the urothelial upper tract for synchronous lesions; imaging of the chest, abdomen, and pelvis for metastases; and MRI pelvis for local staging. CT abdomen and pelvis without and with contrast (CT urogram) is recommended to assess the urothelium and abdominopelvic organs...
May 2018: Journal of the American College of Radiology: JACR
https://www.readbyqxmd.com/read/29721598/current-utilization-and-procedural-practices-in-pediatric-whole-body-mri
#13
Gary R Schooler, Joseph T Davis, Heike E Daldrup-Link, Donald P Frush
BACKGROUND: Whole-body magnetic resonance imaging (MRI) is an evolving and increasingly powerful imaging tool with a variety of applications in the pediatric patient population. Variability exists among radiology practices in how this MRI tool is used and how it performed. OBJECTIVE: Our objective was to gain an improved understanding of technical and utilization practices in pediatric whole-body MRI across North America by exploring indications for exam performance, determining referral patterns, and assessing technical protocols and procedures...
May 2, 2018: Pediatric Radiology
https://www.readbyqxmd.com/read/29719857/foreign-body-granuloma-mimicking-post-chemotherapy-residual-seminoma-a-case-of-true-negative-findings-using-diffusion-weighted-whole-body-magnetic-resonance-imaging-with-background-suppression
#14
Hideki Takeshita, Satoru Kawakami, Taro Takahara, Kojiro Tachibana, Shunsuke Hiranuma, Hironori Sugiyama, Makoto Kagawa, Akihiro Yano, Yohei Okada, Makoto Morozumi
Diffusion-weighted whole-body magnetic resonance imaging with background suppression (DWIBS) is increasingly used in cancer imaging. However, little is known about its usefulness in the management of metastatic seminoma, in which evaluation of the viability of postchemotherapy residual nodules is pivotal. To date, 2-18fluoro-deoxy-d-glucose positron emission tomography (FDG-PET) has been recommended for post-chemotherapeutic assessment. We describe a case of metastatic seminoma in a 27-year-old man in which the viability of post-chemotherapy residual nodules tested false-positive on FDG-PET, but true-negative on DWIBS...
2018: European Journal of Radiology Open
https://www.readbyqxmd.com/read/29717034/magnetic-resonance-imaging-of-bilateral-hands-is-more-optimal-than-mri-of-unilateral-hands-for-rheumatoid-arthritis
#15
Ying-Qian Mo, Ze-Hong Yang, Hai-Ning He, Jian-Da Ma, Jin-Jian Liang, Wei-Ke Zeng, Guang-Zi Shi, Jun Shen, Lie Dai
OBJECTIVE: To explore the advantages of magnetic resonance imaging (MRI) of bilateral hands in rheumatoid arthritis (RA). METHODS: Consecutive patients with active RA were recruited for clinical assessments, radiographs, and MRI of bilateral hands. Bilateral hands were scanned simultaneously on 3.0 T whole-body MRI system and were scored on synovitis, osteitis, and bone erosion according to the RA MRI scoring (RAMRIS) system. RESULTS: Among 120 patients included, wrist bones and metacarpophalangeal joint (MCPJ) 2 proximal showed bone erosion in early RA...
May 1, 2018: Journal of Rheumatology
https://www.readbyqxmd.com/read/29709728/patterns-of-disease-progression-in-patients-with-local-and-metastatic-breast-cancer-as-evaluated-by-whole-body-magnetic-resonance-imaging
#16
Michael Kosmin, Anwar R Padhani, Heminder Sokhi, Toon Thijssen, Andreas Makris
BACKGROUND: Patterns of progressive disease (PD) in patients with local and metastatic sites of breast cancer are poorly described. Whole-body magnetic resonance imaging (WB-MRI) identifies PD earlier than CT. METHODS: Thirty-one patients receiving first-line systemic anti-cancer therapy (SACT) were studied. Data were obtained from original WB-MRI reports. RESULTS: First PD was reported at metastatic sites only in 77.4%, and at local and metastatic sites concurrently in 22...
April 27, 2018: Breast: Official Journal of the European Society of Mastology
https://www.readbyqxmd.com/read/29697493/performance-of-an-automated-versus-a-manual-whole-body-magnetic-resonance-imaging-workflow
#17
Daniel Stocker, Tim Finkenstaedt, Bernd Kuehn, Daniel Nanz, Markus Klarhoefer, Roman Guggenberger, Gustav Andreisek, Berthold Kiefer, Caecilia S Reiner
OBJECTIVES: The aim of this study was to evaluate the performance of an automated workflow for whole-body magnetic resonance imaging (WB-MRI), which reduces user interaction compared with the manual WB-MRI workflow. MATERIALS AND METHODS: This prospective study was approved by the local ethics committee. Twenty patients underwent WB-MRI for myopathy evaluation on a 3 T MRI scanner. Ten patients (7 women; age, 52 ± 13 years; body weight, 69.9 ± 13.3 kg; height, 173 ± 9...
April 24, 2018: Investigative Radiology
https://www.readbyqxmd.com/read/29685521/prospective-evaluation-of-fluciclovine-18-f-pet-ct-and-mri-in-detection-of-recurrent-prostate-cancer-in-non-prostatectomy-patients
#18
Oladunni Akin-Akintayo, Funmilayo Tade, Pardeep Mittal, Courtney Moreno, Peter T Nieh, Peter Rossi, Dattatraya Patil, Raghuveer Halkar, Baowei Fei, Viraj Master, Ashesh B Jani, Hiroumi Kitajima, Adeboye O Osunkoya, Claudia Ormenisan-Gherasim, Mark M Goodman, David M Schuster
PURPOSE: To investigate the disease detection rate, diagnostic performance and interobserver agreement of fluciclovine (18 F) PET-CT and multiparametric magnetic resonance imaging (mpMR) in recurrent prostate cancer. METHODS: Twenty-four patients with biochemical failure after non-prostatectomy definitive therapy, 16/24 of whom had undergone brachytherapy, underwent fluciclovine PET-CT and mpMR with interpretation by expert readers blinded to patient history, PSA and other imaging results...
May 2018: European Journal of Radiology
https://www.readbyqxmd.com/read/29682136/metastatic-cervical-paravertebral-solitary-fibrous-tumor-detected-by-fluorodeoxyglucose-positron-emission-tomography-computed-tomography
#19
Hoiwan Cheung, Courtney Lawhn-Heath, Giselle Lopez, Maya Vella, Carina Mari Aparici
Solitary fibrous tumor/hemangiopericytomas (SFT/HPC) are soft tissue tumors that can arising from the abomen, pleura, head and neck, or extremities. We report an unusual case of recurrent hemangiopericytoma in a 67-year-old female presenting with a painless and palpable mass within her right posterior neck. Eight years after initial resection of the mass, a follow-up MRI showed multiple enlarging calvarial lesions. A whole body FDG-PET/CT revealed not only hypermetabolic calvarial lesions but also numerous hypermetabolic axillary node and osseous metastases...
April 2018: Radiology Case Reports
https://www.readbyqxmd.com/read/29675640/effects-of-combined-whole-body-electromyostimulation-and-protein-supplementation-on-local-and-overall-muscle-fat-distribution-in-older-men-with-sarcopenic-obesity-the-randomized-controlled-franconia-sarcopenic-obesity-franso-study
#20
Wolfgang Kemmler, Alexandra Grimm, Michael Bebenek, Matthias Kohl, Simon von Stengel
The primary aim of the project was to determine the combined effect of whole-body electromyostimulation (WB-EMS) and protein supplements on local and overall muscle/fat distribution in older man with sarcopenic obesity (SO). Community-dwelling (cdw) men ≥ 70 years with SO were randomly allocated to a WB-EMS and protein supplementation (n = 33) or a non-intervention control group (CG: n = 34). WB-EMS was conducted 1.5 sessions of 20 min/week for 16 weeks. Whey protein supplementation aimed to ensure a daily intake of 1...
April 19, 2018: Calcified Tissue International
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