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https://www.readbyqxmd.com/read/28103230/conspicuity-of-malignant-lesions-on-pet-ct-and-simultaneous-time-of-flight-pet-mri
#1
Ryogo Minamimoto, Andrei Iagaru, Mehran Jamali, Dawn Holley, Amir Barkhodari, Shreyas Vasanawala, Greg Zaharchuk
PURPOSE: To compare the conspicuity of malignant lesions between FDG PET/CT and a new simultaneous, time-of-flight (TOF) enabled PET/MRI scanner. METHODS: All patients underwent a single-injection of FDG, followed by a dual imaging protocol consisting of PET/CT followed by TOF PET/MRI. PET/CT and PET/MRI images were evaluated by two readers independently for areas of FDG uptake compatible with malignancy, and then categorized into 5 groups (1: PET/MRI and PET/CT positive; 2: PET/MRI positive, PET/CT positive in retrospect; 3: PET/CT positive, PET/MRI positive in retrospect; 4: PET/MRI positive, PET/CT negative; 5: PET/MRI negative, PET/CT positive) by consensus...
2017: PloS One
https://www.readbyqxmd.com/read/28102031/dual-nano-sized-contrast-agents-in-pet-mri-a-systematic-review
#2
REVIEW
Afsaneh Lahooti, Saeed Sarkar, Sophie Laurent, Saeed Shanehsazzadeh
Nowadays molecular imaging plays a vital role in achieving a successful targeted and personalized treatment. Hence, the approach of combining two or more medical imaging modalities was developed. The objective of this review is to systematically compare recent dual contrast agents in Positron Emission Tomography (PET)/Magnetic Resonance Imaging (MRI) and in some cases Single photon emission computed tomography (SPECT)/MRI in terms of some their characteristics, such as tumor uptake, and reticuloendothelial system uptake (especially liver) and their relaxivity rates for early detection of primary cancer tumor...
November 2016: Contrast Media & Molecular Imaging
https://www.readbyqxmd.com/read/28099995/technical-note-fast-respiratory-motion-estimation-using-sorted-singles-without-unlist-processing-a-feasibility-study
#3
Jaewon Yang, Mehdi Khalighi, Thomas A Hope, Karen Ordovas, Youngho Seo
PURPOSE: The study aims to demonstrate the feasibility of fast respiratory motion estimation using singles data available as a sorted format in list-mode files acquired in an integrated PET/MRI system for a proof-of-concept. METHODS: The derivation of SDRM is enabled by singles recorded and binned by second for each detector crystal in PET list-mode data acquired in a SIGNA PET/MR. The proposed method is to derive a SDRM trace by summing up all singles from all detectors through the PET data acquisition...
January 18, 2017: Medical Physics
https://www.readbyqxmd.com/read/28096259/bariatric-surgery-enhances-splanchnic-vascular-responses-in-patients-with-type-2-diabetes
#4
Henri Honka, Jukka Koffert, Saila Kauhanen, Jarmo Teuho, Saija Hurme, Andrea Mari, Andreas Lindqvist, Nils Wierup, Leif Groop, Pirjo Nuutila
Bariatric surgery results in notable weight loss and alleviates hyperglycemia in patients with type 2 diabetes (T2D). In this study, we aimed to characterize the vascular effects of a mixed-meal and of infusion of exogenous glucose-dependent insulinotropic polypeptide (GIP) in the splanchnic region in ten obese patients with T2D before and after bariatric surgery and in ten lean controls. The experiments were carried out on two separate days. Pancreatic and intestinal blood flow (BF) were measured at baseline, 20 and 50 minutes with (15)O-water using positron emission tomography and magnetic resonance imaging (PET/MRI)...
January 17, 2017: Diabetes
https://www.readbyqxmd.com/read/28091604/polyglucose-nanoparticles-with-renal-elimination-and-macrophage-avidity-facilitate-pet-imaging-in-ischaemic-heart-disease
#5
Edmund J Keliher, Yu-Xiang Ye, Gregory R Wojtkiewicz, Aaron D Aguirre, Benoit Tricot, Max L Senders, Hannah Groenen, Francois Fay, Carlos Perez-Medina, Claudia Calcagno, Giuseppe Carlucci, Thomas Reiner, Yuan Sun, Gabriel Courties, Yoshiko Iwamoto, Hye-Yeong Kim, Cuihua Wang, John W Chen, Filip K Swirski, Hsiao-Ying Wey, Jacob Hooker, Zahi A Fayad, Willem J M Mulder, Ralph Weissleder, Matthias Nahrendorf
Tissue macrophage numbers vary during health versus disease. Abundant inflammatory macrophages destruct tissues, leading to atherosclerosis, myocardial infarction and heart failure. Emerging therapeutic options create interest in monitoring macrophages in patients. Here we describe positron emission tomography (PET) imaging with (18)F-Macroflor, a modified polyglucose nanoparticle with high avidity for macrophages. Due to its small size, Macroflor is excreted renally, a prerequisite for imaging with the isotope flourine-18...
January 16, 2017: Nature Communications
https://www.readbyqxmd.com/read/28090451/potential-of-pet-mri-for-imaging-of-non-oncologic-musculoskeletal-disease
#6
REVIEW
Feliks Kogan, Audrey P Fan, Garry E Gold
Early detection of musculoskeletal disease leads to improved therapies and patient outcomes, and would benefit greatly from imaging at the cellular and molecular level. As it becomes clear that assessment of multiple tissues and functional processes are often necessary to study the complex pathogenesis of musculoskeletal disorders, the role of multi-modality molecular imaging becomes increasingly important. New positron emission tomography-magnetic resonance imaging (PET-MRI) systems offer to combine high-resolution MRI with simultaneous molecular information from PET to study the multifaceted processes involved in numerous musculoskeletal disorders...
December 2016: Quantitative Imaging in Medicine and Surgery
https://www.readbyqxmd.com/read/28089955/is-integrated-18f-fdg-pet-mri-superior-to-18f-fdg-pet-ct-in-the-differentiation-of-incidental-tracer-uptake-in-the-head-and-neck-area
#7
Benedikt Michael Schaarschmidt, Benedikt Gomez, Christian Buchbender, Johannes Grueneisen, Felix Nensa, Lino Morris Sawicki, Verena Ruhlmann, Axel Wetter, Gerald Antoch, Philipp Heusch
PURPOSE: We aimed to investigate the accuracy of 18F-fluorodeoxyglucose positron emission tomography/magnetic resonance imaging (18F-FDG PET/MRI) compared with contrast-enhanced 18F-FDG PET/computed tomography (PET/CT) for the characterization of incidental tracer uptake in examinations of the head and neck. METHODS: A retrospective analysis of 81 oncologic patients who underwent contrast-enhanced 18F-FDG PET/CT and subsequent PET/MRI was performed by two readers for incidental tracer uptake...
January 16, 2017: Diagnostic and Interventional Radiology: Official Journal of the Turkish Society of Radiology
https://www.readbyqxmd.com/read/28088288/a-novel-mouse-model-of-staphylococcus-aureus-vascular-graft-infection-noninvasive-imaging-of-biofilm-development-in%C3%A2-vivo
#8
Hélène Van de Vyver, Philipp R Bovenkamp, Verena Hoerr, Katrin Schwegmann, Lorena Tuchscherr, Silke Niemann, Laura Kursawe, Christina Grosse, Annette Moter, Uwe Hansen, Ute Neugebauer, Michael T Kuhlmann, Georg Peters, Sven Hermann, Bettina Löffler
Staphylococcus aureus causes very serious infections of vascular grafts. Knowledge of the molecular mechanisms of this disease is largely lacking because of the absence of representable models. Therefore, the aim of this study was to set up a mouse model of vascular graft infections that closely mimics the human situation. A catheter was inserted into the right carotid artery of mice, which acted as a vascular graft. Mice were infected i.v. using 8 different S. aureus strains, and development of the infection was followed up...
January 4, 2017: American Journal of Pathology
https://www.readbyqxmd.com/read/28048528/we-h-206-01-photoacoustic-tomography-multiscale-imaging-from-organelles-to-patients-by-ultrasonically-beating-the-optical-diffusion-limit
#9
L Wang
: Lihong V. Wang: Photoacoustic tomography (PAT), combining non-ionizing optical and ultrasonic waves via the photoacoustic effect, provides in vivo multiscale functional, metabolic, and molecular imaging. Broad applications include imaging of the breast, brain, skin, esophagus, colon, vascular system, and lymphatic system in humans or animals. Light offers rich contrast but does not penetrate biological tissue in straight paths as x-rays do. Consequently, high-resolution pure optical imaging (e...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28047869/we-h-206-02-recent-advances-in-multi-modality-molecular-imaging-of-small-animals
#10
B Tsui
: Lihong V. Wang: Photoacoustic tomography (PAT), combining non-ionizing optical and ultrasonic waves via the photoacoustic effect, provides in vivo multiscale functional, metabolic, and molecular imaging. Broad applications include imaging of the breast, brain, skin, esophagus, colon, vascular system, and lymphatic system in humans or animals. Light offers rich contrast but does not penetrate biological tissue in straight paths as x-rays do. Consequently, high-resolution pure optical imaging (e...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28047205/we-h-206-03-promises-and-challenges-of-benchtop-x-ray-fluorescence-ct-xfct-for-quantitative-in-vivo-imaging
#11
S Cho
: Lihong V. Wang: Photoacoustic tomography (PAT), combining non-ionizing optical and ultrasonic waves via the photoacoustic effect, provides in vivo multiscale functional, metabolic, and molecular imaging. Broad applications include imaging of the breast, brain, skin, esophagus, colon, vascular system, and lymphatic system in humans or animals. Light offers rich contrast but does not penetrate biological tissue in straight paths as x-rays do. Consequently, high-resolution pure optical imaging (e...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28046461/we-h-206-00-advances-in-preclinical-imaging
#12
Patrick La Riviere
: Lihong V. Wang: Photoacoustic tomography (PAT), combining non-ionizing optical and ultrasonic waves via the photoacoustic effect, provides in vivo multiscale functional, metabolic, and molecular imaging. Broad applications include imaging of the breast, brain, skin, esophagus, colon, vascular system, and lymphatic system in humans or animals. Light offers rich contrast but does not penetrate biological tissue in straight paths as x-rays do. Consequently, high-resolution pure optical imaging (e...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28046380/we-fg-202-06-the-use-of-hybrid-pet-mri-for-identifying-the-presence-of-cardiac-inflammation-following-external-beam-irradiation
#13
O El-Sherif, I Xhaferllari, J Sykes, J Butler, J Battista, G Wisenberg, F Prato, S Gaede
PURPOSE: To monitor the evolution of radiation-induced cardiac inflammation in a canine model using hybrid positron emission tomography (PET/magnetic resonance imaging (MRI). METHODS: Research ethics approval was obtained for a longitudinal imaging study of 5 canines after cardiac irradiation. Animals were imaged at baseline, 3 months, 6 months, and 12 months post cardiac irradiation using a hybrid PET-MRI system (Biograph mMR, Siemens Healthcare). The imaging protocol was designed to assess changes in cardiac inflammation using (18) F-fluorodeoxyglucose ((18) F-FDG) PET tracer...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28045733/pet-mri-coregistration-in-intractable-epilepsy-and-gray-matter-heterotopia
#14
Nikhil Seniaray, Anuj Jain
A 25-year-old woman with intractable seizures underwent FDG PET/MRI for seizure focus localization. MRI demonstrated bilateral carpetlike nodular subependymal gray matter and asymmetrical focal dilatation in the right temporal horn. PET/MRI showed increased FDG within subependymal gray matter with significant hypometabolism in right anterior temporal lobe. EEG and ictal semiology confirmed the right temporal seizure origin. This case highlights the importance of identification of gray matter heterotopia on FDG PET/MRI...
December 30, 2016: Clinical Nuclear Medicine
https://www.readbyqxmd.com/read/28042330/comparison-of-68-ga-hbed-cc-psma-pet-ct-and-multiparametric-mri-for-gross-tumour-volume-detection-in-patients-with-primary-prostate-cancer-based-on-slice-by-slice-comparison-with-histopathology
#15
Constantinos Zamboglou, Vanessa Drendel, Cordula A Jilg, Hans C Rischke, Teresa I Beck, Wolfgang Schultze-Seemann, Tobias Krauss, Michael Mix, Florian Schiller, Ulrich Wetterauer, Martin Werner, Mathias Langer, Michael Bock, Philipp T Meyer, Anca L Grosu
PURPOSE: The exact detection and delineation of the intraprostatic tumour burden is crucial for treatment planning in primary prostate cancer (PCa). We compared (68)Ga-HBED-CC-PSMA PET/CT with multiparametric MRI (mpMRI) for diagnosis and tumour delineation in patients with primary PCa based on slice by slice correlation with histopathological reference material. METHODOLOGY: Seven patients with histopathologically proven primary PCa underwent (68)Ga-HBED-CC-PSMA PET/CT and MRI followed by radical prostatectomy...
2017: Theranostics
https://www.readbyqxmd.com/read/28035580/simultaneous-pet-mri-assessment-of-response-to-cytotoxic-and-hormone-neo-adjuvant-chemotherapy-in-breast-cancer-a-preliminary-report
#16
Valeria Romeo, Massimiliano D'Aiuto, Giuseppe Frasci, Massimo Imbriaco, Emanuele Nicolai
The aim of this study was to assess the response to cytotoxic and hormone neo-adjuvant chemotherapy in four patients with locally advanced breast cancer by simultaneous PET/MRI. Four patients with locally advanced breast cancer underwent simultaneous PET/MRI of the breast using a 3 T Biograph mMR before and after neo-adjuvant chemotherapy (two patients were treated with hormone-therapy and two patients were treated with cytotoxic chemotherapy). Morpho-structural tumoral features and tumor size were assessed; area value, metabolic (SUV and MTV) and functional (ADC, K trans, V e, k ep and iAUC) data were obtained by positioning regions of interest...
February 2017: Medical Oncology
https://www.readbyqxmd.com/read/28033217/concordance-of-18f-fdg-pet-uptake-in-tumor-and-normal-tissues-on-pet-mri-and-pet-ct
#17
W Phillip Law, Nicole Maggacis, Susanne J Jeavons, Kenneth A Miles
AIM: The aim of this study was to assess the concordance of PET measurements of F-FDG uptake in tumor and normal tissues obtained on Australia's first clinical PET/MRI scanner in comparison to PET/CT, with comparison against published data. METHODS: One hundred subjects were prospectively recruited from an unselected, heterogeneous group of cancer patients to undergo F-FDG PET/CT and PET/MRI on the same day. SUVs of physiological regions and tumor tissues obtained by PET/MRI and PET/CT were compared and benchmarked against existing published data...
December 28, 2016: Clinical Nuclear Medicine
https://www.readbyqxmd.com/read/28027758/role-of-pharmacokinetic-parameters-derived-with-high-temporal-resolution-dce-mri-using-simultaneous-pet-mri-system-in-breast-cancer-a-feasibility-study
#18
Amarnath Jena, Sangeeta Taneja, Aru Singh, Pradeep Negi, Shashi Bhushan Mehta, Ramesh Sarin
PURPOSE: To evaluate the reliability of pharmacokinetic parameters like K(trans), Kep and ve derived through DCE MRI breast protocol using 3T Simultaneous PET/MRI (3Tesla Positron Emission Tomography/Magnetic Resonance Imaging) system in distinguishing benign and malignant lesions. MATERIALS AND METHODS: High temporal resolution DCE (Dynamic Contrast Enhancement) MRI performed as routine breast MRI for diagnosis or as a part of PET/MRI for cancer staging using a 3T simultaneous PET/MRI system in 98 women having 109 breast lesions were analyzed for calculation of pharmacokinetic parameters (K(trans), ve, and Kep) at 60s time point using an in-house developed computation scheme...
January 2017: European Journal of Radiology
https://www.readbyqxmd.com/read/28008425/quantitative-pet-mri-evaluation-and-application-in-dementia
#19
Yongxia Zhou
A recently introduced integrated scanner combining simultaneous positron emission tomography (PET) and magnetic resonance imaging (MRI) (PET/MRI) acquisition presents a unique set of opportunities for neuroimaging research and dementia in particular [1]. Among these, the intrinsic co-registration of the images has the potential to reduce errors in multi-modality image registration, which could lead to better quantification of longitudinal volumetric changes in neuroanatomical features that are important for assessing disease progression...
June 2016: Jacobs J Med Diagn Med Imaging
https://www.readbyqxmd.com/read/28004161/mri-fused-with-prone-fdg-pet-ct-improves-the-primary-tumour-staging-of-patients-with-breast-cancer
#20
Maria J Garcia-Velloso, Maria J Ribelles, Macarena Rodriguez, Alejandro Fernandez-Montero, Lidia Sancho, Elena Prieto, Marta Santisteban, Natalia Rodriguez-Spiteri, Miguel A Idoate, Fernando Martinez-Regueira, Arlette Elizalde, Luis J Pina
OBJECTIVE: Our aim was to evaluate the diagnostic accuracy of magnetic resonance imaging (MRI) fused with prone 2-[fluorine-18]-fluoro-2-deoxy-D-glucose (FDG) positron emission tomography (PET) in primary tumour staging of patients with breast cancer. METHODS: This retrospective study evaluated 45 women with 49 pathologically proven breast carcinomas. MRI and prone PET-CT scans with time-of-flight and point-spread-function reconstruction were performed with the same dedicated breast coil...
December 21, 2016: European Radiology
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