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PET MRI

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https://www.readbyqxmd.com/read/29792727/added-value-of-including-entire-brain-on-body-imaging-with-fdg-pet-mri
#1
Ana M Franceschi, Robert Matthews, Lev Bangiyev, Nand Relan, Ammar Chaudhry, Dinko Franceschi
OBJECTIVE: FDG PET/MRI examination of the body is routinely performed from the skull base to the mid thigh. Many types of brain abnormalities potentially could be detected on PET/MRI if the head was included. The objective of this study was therefore to identify and characterize brain findings incidentally detected on PET/MRI of the body with the head included. MATERIALS AND METHODS: We retrospectively identified 269 patients with FDG PET/MRI whole-body scans that included the head...
May 24, 2018: AJR. American Journal of Roentgenology
https://www.readbyqxmd.com/read/29792210/quantitative-cardiovascular-magnetic-resonance-extracellular-volume-native-t1-and-18f-fdg-pet-cmr-imaging-in-patients-after-revascularized-myocardial-infarction-and-association-with-markers-of-myocardial-damage-and-systemic-inflammation
#2
Karl P Kunze, Ralf J Dirschinger, Hans Kossmann, Franziska Hanus, Tareq Ibrahim, Karl-Ludwig Laugwitz, Markus Schwaiger, Christoph Rischpler, Stephan G Nekolla
BACKGROUND: Characterization of tissue integrity and inflammatory processes after acute myocardial infarction (AMI) using non-invasive imaging is predictive of patient outcome. Quantitative cardiovascular magnetic resonance (CMR) techniques such as native T1 and extracellular volume (ECV) mapping as well as 18 F-FDG positron emission tomography (PET) imaging targeting inflammatory cell populations are gaining acceptance, but are often applied without assessing their quantitative potential...
May 24, 2018: Journal of Cardiovascular Magnetic Resonance
https://www.readbyqxmd.com/read/29790820/towards-quantitative-18f-fdg-pet-mri-of-the-brain-automated-mr-driven-calculation-of-an-image-derived-input-function-for-the-non-invasive-determination-of-cerebral-glucose-metabolic-rates
#3
Lalith Ks Sundar, Otto Muzik, Lucas Rischka, Andreas Hahn, Ivo Rausch, Rupert Lanzenberger, Marius Hienert, Eva-Maria Klebermass, Frank-Günther Füchsel, Marcus Hacker, Magdalena Pilz, Ekaterina Pataraia, Tatjana Traub-Weidinger, Thomas Beyer
Absolute quantification of PET brain imaging requires the measurement of an arterial input function (AIF), typically obtained invasively via an arterial cannulation. We present an approach to automatically calculate an image-derived input function (IDIF) and cerebral metabolic rates of glucose (CMRGlc) from the [18F]FDG PET data using an integrated PET/MRI system. Ten healthy controls underwent test-retest dynamic [18F]FDG-PET/MRI examinations. The imaging protocol consisted of a 60-min PET list-mode acquisition together with a time-of-flight MR angiography scan for segmenting the carotid arteries and intermittent MR navigators to monitor subject movement...
January 1, 2018: Journal of Cerebral Blood Flow and Metabolism
https://www.readbyqxmd.com/read/29788984/f-18-fdg-pet-ct-in-26-patients-with-sapho-syndrome-a-new-vision-of-clinical-and-bone-scintigraphy-correlation
#4
Xiaochuan Sun, Chen Li, Yihan Cao, Ximin Shi, Li Li, Weihong Zhang, Xia Wu, Nan Wu, Hongli Jing, Wen Zhang
BACKGROUNDS: Whole-body bone scintigraphy (WBBS) and MRI are widely used in assessment of patients with synovitis, acne, pustulosis, hyperostosis, and osteitis (SAPHO) syndrome. However, the value of F-18 fluorodeoxyglucose-positron emission tomography/computed tomography (18 F-FDG PET/CT) in SAPHO syndrome was unclear. The aim of this study was to characterize the manifestation of SAPHO syndrome on 18 F-FDG PET/CT and explore its relationship with clinical symptoms and WBBS. METHODS: Twenty-six patients who suffered from SAPHO syndrome and had undergone whole-body 18 F-FDG PET/CT were recruited in Peking Union Medical College Hospital from 2004 to 2016...
May 22, 2018: Journal of Orthopaedic Surgery and Research
https://www.readbyqxmd.com/read/29788902/dystonia-deafness-syndrome-caused-by-actb-p-arg183trp-heterozygosity-shows-striatal-dopaminergic-dysfunction-and-response-to-pallidal-stimulation
#5
Inger Marie Skogseid, Oddveig Røsby, Ane Konglund, James P Connelly, Bård Nedregaard, Greg Eigner Jablonski, Nadja Kvernmo, Asbjørg Stray-Pedersen, Joel C Glover
BACKGROUND: Dystonia-deafness syndrome is a well-known clinical entity, with sensorineural deafness typically manifesting earlier than dystonia. ACTB p.Arg183Trp heterozygosity has been reported in six patients to cause combined infant-onset deafness and dystonia manifesting in adolescence or young adulthood. Three of these have received beneficial pallidal stimulation. Brain imaging to assess striatal function has not been reported previously, however. Nor has a comprehensive hypothesis been presented for how the pleiotropic manifestations of this specific beta-actin gene mutation originate developmentally...
May 22, 2018: Journal of Neurodevelopmental Disorders
https://www.readbyqxmd.com/read/29788534/prospective-evaluation-of-68-ga-dotatate-pet-ct-in-limited-disease-neuroendocrine-tumors-and-or-elevated-serum-neuroendocrine-biomarkers
#6
Sophie Gabriel, Philippe Garrigue, Laetitia Dahan, Frédéric Castinetti, Frédéric Sebag, Karine Baumstark, Cendrine Archange, Jha Abhishek, Karel Pacak, Benjamin Guillet, David Taïeb
CONTEXT: The 68 Ga-labelled somatostatin analogues (68 Ga-DOTA-SSAs) is becoming popular as an important diagnostic tool in neuroendocrine tumors as evidenced by a growing number of reports detailing institutional experience with various DOTA peptides. However, only few prospective studies have compared 68 Ga-DOTA-SSAs and somatostatin receptor scintigraphy (SRS) in gastroenteropancreatic neuroendocrine tumors (GEP-NETs) and pulmonary neuroendocrine tumors. OBJECTIVE: The aim of our prospective study was to perform head-to-head comparison between 68 Ga-DOTATATE PET/CT and standard imaging work-up (SI) that included multiphasic CT, liver MRI, and SRS using single photon emission computed tomography...
May 22, 2018: Clinical Endocrinology
https://www.readbyqxmd.com/read/29788497/a-study-of-the-focal-adhesion-kinase-inhibitor-gsk2256098-in-patients-with-recurrent-glioblastoma-with-evaluation-of-tumor-penetration-of-11c-gsk2256098
#7
Nicholas F Brown, Matthew Williams, Hendrik-Tobias Arkenau, Ronald A Fleming, Jerry Tolson, Li Yan, Jianping Zhang, Lisa Swartz, Rajendra Singh, Kurt R Auger, Laurie Lenox, David Cox, Yvonne Lewis, Christophe Plisson, Graham Searle, Azeem Saleem, Sarah Blagden, Paul Mulholland
Background: GSK2256098 is a novel oral focal adhesion kinase inhibitor. Preclinical studies demonstrate growth inhibition in glioblastoma cell lines. However, rodent studies indicate limited blood-brain barrier penetration. In this expansion cohort within a phase I study, the safety, tolerability, pharmacokinetics and clinical activity of GSK2256098 were evaluated in patients with recurrent glioblastoma. Biodistribution and kinetics of [11C]GSK2256098 were assessed in a sub-study using positron-emission tomography (PET)...
May 17, 2018: Neuro-oncology
https://www.readbyqxmd.com/read/29787313/clinical-nononcologic-applications-of-pet-ct-and-pet-mri-in-musculoskeletal-orthopedic-and-rheumatologic-imaging
#8
Ali Gholamrezanezhad, Kyle Basques, Ali Batouli, George Matcuk, Abass Alavi, Hossein Jadvar
OBJECTIVE: With improvements in PET/CT and PET/MRI over the last decade, as well as increased understanding of the pathophysiology of musculoskeletal diseases, there is an emerging potential for PET as a primary or complementary modality in the management of rheumatologic and orthopedic conditions. CONCLUSION: We discuss the role of PET/CT and PET/MRI in nononcologic musculoskeletal disorders, including inflammatory and infectious conditions and postoperative complications...
June 2018: AJR. American Journal of Roentgenology
https://www.readbyqxmd.com/read/29786487/diffusion-weighted-mri-is-superior-to-pet-ct-in-predicting-survival-of-patients-undergoing-90-y-radioembolization-of-hepatic-metastases
#9
Alexandra Barabasch, Alexander Heinzel, Philipp Bruners, Nils A Kraemer, Christiane K Kuhl
Purpose To determine the relationship between diffusion-weighted (DW) liver MR images obtained 4-6 weeks after lobar yttrium 90 (90 Y) treatment and overall survival in comparison with PET/CT or established oncologic factors known to affect survival. Materials and Methods The institutional review board approved this prospective intraindividual comparative study in 36 consecutive patients (25 women) with liver-dominant metastases (20 colorectal, 14 breast, two other) (mean age, 60 years ± 10 [standard deviation]) who underwent fluorine 18 (18 F) fluorodeoxyglucose (FDG) PET/CT and DW MRI before and 4-6 weeks after 90 Y radioembolization...
May 21, 2018: Radiology
https://www.readbyqxmd.com/read/29785317/a-rare-case-of-penile-metastases-as-a-harbinger-of-primary-pulmonary-adenosquamous-carcinoma
#10
Partha Hota, Tejas N Patel, Xiaofeng Zhao, Carrie Schneider, Omar Agosto
Although lung cancer has a high propensity for distant metastatic disease, penile metastases from primary lung neoplasms are considered particularly rare. A 71-year-old male presented to our hospital with a rapidly enlarging hard palpable penile mass. MR imaging demonstrated two penile masses centered in the left and right corpus cavernosa. Subsequent CT imaging revealed a spiculated pulmonary mass in the right upper lobe with PET/CT, MRI, and surgical exploration, demonstrating evidence of metastases to the left adrenal gland, right subscapularis muscle, brain, and small bowel...
2018: Case Reports in Radiology
https://www.readbyqxmd.com/read/29782653/data-driven-gating-in-pet-influence-of-respiratory-signal-noise-on-motion-resolution
#11
Florian Büther, Iris Ernst, Lynn Johann Frohwein, Joost Pouw, Klaus Peter Schäfers, Lars Stegger
PURPOSE: Data-driven gating (DDG) approaches for positron emission tomography (PET) are interesting alternatives to conventional hardware-based gating methods. In DDG, the measured PET data themselves are utilized to calculate a respiratory signal that is subsequently used for gating purposes. The success of gating is then highly dependent on the statistical quality of the PET data. In this study we investigate how this quality determines signal noise and thus motion resolution in clinical PET scans using a center-of-mass-based (COM) DDG approach, specifically with regard to motion management of target structures in future radiotherapy planning applications...
May 21, 2018: Medical Physics
https://www.readbyqxmd.com/read/29782606/-68-ga-psma-and-11-c-choline-comparison-using-a-tri-modality-pet-ct-mri-3-0-t-system-with-a-dedicated-shuttle
#12
Omar Alonso, Gerardo Dos Santos, Margarita García Fontes, Henia Balter, Henry Engler
Background: The aim of this study was to prospectively compare the detection rate of 68 Ga-PSMA versus 11 C-Choline in men with prostate cancer with biochemical recurrence and to demonstrate the added value of a tri-modality PET/CT-MRI system. Methods: We analysed 36 patients who underwent both 11 C-Choline PET/CT and 68 Ga-PSMA PET/CT scanning within a time window of 1-2 weeks. Additionally, for the 68 Ga-PSMA scan, we used a PET/CT-MRI (3.0 T) system with a dedicated shuttle, acquiring MRI images of the pelvis...
2018: European journal of hybrid imaging
https://www.readbyqxmd.com/read/29782605/trends-in-oncologic-hybrid-imaging
#13
REVIEW
Andreas G Wibmer, Hedvig Hricak, Gary A Ulaner, Wolfgang Weber
Hybrid imaging plays a central role in the diagnosis and management of a wide range of malignancies at all stages. In this article, we review the most pertinent historical developments, emerging clinical applications of novel radiotracers and imaging technologies, and potential implications for training and practice. This includes an overview of novel tracers for prostate, breast, and neuroendocrine tumors, assessment of tumor heterogeneity, the concept of image-guided 'biologically relevant dosing', and theranostic applications...
2018: European journal of hybrid imaging
https://www.readbyqxmd.com/read/29782369/neuroimaging-in-epilepsy
#14
Meneka Kaur Sidhu, John S Duncan, Josemir W Sander
PURPOSE OF REVIEW: Epilepsy neuroimaging is important for detecting the seizure onset zone, predicting and preventing deficits from surgery and illuminating mechanisms of epileptogenesis. An aspiration is to integrate imaging and genetic biomarkers to enable personalized epilepsy treatments. RECENT FINDINGS: The ability to detect lesions, particularly focal cortical dysplasia and hippocampal sclerosis, is increased using ultra high-field imaging and postprocessing techniques such as automated volumetry, T2 relaxometry, voxel-based morphometry and surface-based techniques...
May 17, 2018: Current Opinion in Neurology
https://www.readbyqxmd.com/read/29781098/pet-imaging-of-the-influence-of-physiological-and-pathological-%C3%AE-synuclein-on-dopaminergic-and-serotonergic-neurotransmission-in-mouse-models
#15
Elise Levigoureux, Caroline Bouillot, Thierry Baron, Luc Zimmer, Sophie Lancelot
AIMS: Alpha-synuclein (α-syn) aggregation is a neuropathological hallmark of neurodegenerative synucleinopathies. This in vivo study explored glucose metabolism and dopaminergic and serotoninergic neurotransmission in KO α-syn, wild-type mice and an accelerated murine model of synucleinopathy (M83). METHODS: MicroPET acquisitions were performed in all animals aged 5-6 months using five radiotracers exploring brain glucose metabolism ([18 F]FDG), dopamine neurotransmission ([11 C]raclopride, [11 C]PE2I) and serotonin neurotransmission ([18 F]MPPF, [11 C]DASB)...
May 20, 2018: CNS Neuroscience & Therapeutics
https://www.readbyqxmd.com/read/29777360/crossed-aphasia-following-cerebral-infarction-in-a-right-handed-patient-with-atypical-cerebral-language-dominance
#16
Xiaoping Tan, Yang Guo, Saihong Dun, Hongzan Sun
OBJECTIVE: Crossed aphasia (CA), usually referred to as an acquired language disturbance, is caused by a lesion in the cerebral hemisphere ipsilateral to the dominant hand, and the exact mechanism is not clear. The development of handedness is influenced by education and training and the impact of habitualization, while language is more susceptible to the impact of speech habits, and it is not absolutely accurate to judge cerebral language dominance by the degree of hand preference. METHODS: We describe a case of CA after right hemispheric stroke in a right-handed patient with atypical language dominance and attempt to analyze the mechanism of CA based on functional imaging methods, including arterial spin labeling (ASL) and positron emission tomography/magnetic resonance imaging (PET-MRI)...
May 18, 2018: Journal of Neurology
https://www.readbyqxmd.com/read/29777006/in-vivo-characterization-and-quantification-of-neurofibrillary-tau-pet-radioligand-18-f-mk-6240-in-humans-from-alzheimer-s-disease-dementia-to-young-controls
#17
Tobey J Betthauser, Karly A Cody, Matthew D Zammit, Dhanabalan Murali, Alexander K Converse, Todd E Barnhart, Charles K Stone, Howard A Rowley, Sterling C Johnson, Bradley T Christian
Tau positron emission tomography (PET) imaging has potential for elucidating changes in the deposition of neuropathological tau aggregates that are occurring during the progression of Alzheimer's disease (AD). This work investigates in vivo kinetics, quantification strategies and imaging characteristics of a novel tau PET radioligand [18 F]MK-6240 in humans. Methods: Fifty-one individuals ranging from cognitively normal young controls to persons with dementia underwent T1-weighted magnetic resonance imaging (MRI), and [11 C]PiB and [18 F]MK-6240 PET imaging...
May 18, 2018: Journal of Nuclear Medicine: Official Publication, Society of Nuclear Medicine
https://www.readbyqxmd.com/read/29776894/amyloid-pet-in-neurodegenerative-diseases-with-dementia
#18
V Camacho, A Gómez-Grande, P Sopena, D García-Solís, M Gómez Río, C Lorenzo, S Rubí, J Arbizu
Alzheimer's disease (AD) is a neurodegenerative condition characterized by progressive cognitive decline and memory loss, and is the most common form of dementia. Amyloid plaques with neurofibrillary tangles are a neuropathological hallmark of AD that produces synaptic dysfunction and culminates later in neuronal loss. Amyloid PET is a useful, available and non-invasive technique that provides in vivo information about the cortical amyloid burden. In the latest revised criteria for the diagnosis of AD biomarkers were defined and integrated: pathological and diagnostic biomarkers (increased retention on fibrillar amyloid PET or decreased Aβ1-42 and increased T-Tau or P-Tau in CSF) and neurodegeneration or topographical biomarkers (temporoparietal hypometabolism on 18 F-FDG PET and temporal atrophy on MRI)...
May 15, 2018: Revista Española de Medicina Nuclear e Imagen Molecular
https://www.readbyqxmd.com/read/29772552/pet-ct-in-the-diagnosis-and-prognosis-of-osteosarcoma
#19
Xiaojuan Zhang, Zhe Guan
Osteosarcoma is an aggressive malignancy that usually occurs in children and young adults, and long-term survival is only about 20% in patients with metastasis or recurrent disease. Traditional non-invasive techniques, such as positron-emission tomography (PET) scanning, magnetic resonance imaging (MRI) or computed tomography (CT) scanning, may not identify single lesions in the early stage or accurately detect small lesions. A novel technique, positron emission tomography/computed tomography (PET/CT), which is widely used in clinical practice, shows more accuracy, sensitivity, and specificity in the diagnosis of osteosarcoma...
June 1, 2018: Frontiers in Bioscience (Landmark Edition)
https://www.readbyqxmd.com/read/29771090/-the-role-of-%C3%A2-%C3%A2-f-fdg-pet-ct-for-detecting-nodal-metastases-in-cn0-head-neck-cancer-patients%C3%AF-a-meta-analysis
#20
X Y Li, C L Sun, X D Du
Objective: The aim of this study is to evaluate the accuracy of ¹⁸F-fluorodeoxyglucose PET/CT(¹⁸F-FDG PET/CT) for the diagnosis of cervical node metastases in cN0 head neck cancer patients. Method: An electronic database search(PubMed,EMBASE,Cochrane Library,WanFang and CNKI databases)was performed. Updated quality assessment of diagnostic accuracy studies-2(QUADAS-2) was used to assess study quality. Data analyses were performed with Meta-Disc1.4. Result: Eight studies were included in the present Meta-analysis...
May 2018: Journal of Clinical Otorhinolaryngology, Head, and Neck Surgery
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