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Post-radioembolization Yttrium-90 PET/CT - Part 1

Jul 25, 2013  · Methods. This is a retrospective review of all paired 90 Y PET/CT and 90 Y bremsstrahlung SPECT/CT scans over a 1-year period. We compared image resolution, ability to confirm technical success, detection of non-target activity, and providing conclusive information about 90 Y activity within targeted tumor vascular thrombosis. 90 Y resin microspheres were used.

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The Benefit of Pets and Animal-Assisted Therapy to the ...

Posted: (52 years ago) Nov 16, 2014  · Epidemiologic studies suggest pet owners may acquire physical benefits, such as improved blood pressure and greater physical activity. Among 5741 individuals in Australia, those who possessed pets had a significantly lower resting systolic blood pressure, a mean 5 mg/dL lesser cholesterol, and 84 mg/dL triglyceride levels which were statistically significant [].

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Canine visits booster patient morale.

Posted: (52 years ago) 1. Calif Hosp. 1993 May-Jun;7(3):21-3. Canine visits booster patient morale. Willis S(1). Author information: (1)Huntington Memorial Hospital, Pasadena. PMID: 10126086 [Indexed for MEDLINE]

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PET Scanning - StatPearls - NCBI Bookshelf

Posted: (52 years ago) Oct 09, 2021  · Positron emission tomography (PET) scanning is an imaging modality with primary use in the field of oncology. It utilizes radiotracers for measuring various metabolic processes in the body. Various changes in metabolism, blood flow, and regional chemical composition can be analyzed by it. Radio-tracers can be injected, swallowed, or inhaled depending upon the site of the body being …

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Positron emission tomography: An overview

Posted: (52 years ago) Mar 01, 2006  · The Positron Emission Tomography (PET), as already explained, has a unique ability to provide functional as well as metabolic information related to tumor cells. In order to effectively deploy this characteristic, Flourine-18 Fluoro-2-Deoxy Glucose (FDG) has been used to …

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Enzymatic Remediation of Polyethylene Terephthalate …

Posted: (52 years ago) PET is a semicrystalline, colorless, hygroscopic resin with excellent properties of high wear and tear resistance, high tensile strength, and transparency (Koshti et al., 2018). Owing to these properties, PET is extensively used in packaging industries. Prominently, it is used in plastic bottles of soft drinks, food jars, and plastics films.

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PET/CT in paediatric malignancies - An update

Posted: (52 years ago) 18 F-fluorodeoxyglucose positron emission tomography (FDG-PET) is a well-established imaging modality in adult oncological practice. Its role in childhood malignancies needs to be discussed as paediatric malignancies differ from adults in tumor subtypes and they have different tumor biology and FDG uptake patterns.

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Randomized prospective phase III trial of 68Ga-PSMA-11 …

Posted: (52 years ago) Jan 07, 2019  · Methods. We will randomize 193 patients to proceed with standard SRT (control arm 1, n = 90) or undergo a PSMA PET/CT scan (free of charge for patients) prior to SRT planning (investigational arm 2, n = 103).The primary endpoint is the success rate of SRT measured as biochemical progression-free survival (BPFS) after initiation of SRT.

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Imaging of COVID-19: CT, MRI, and PET

Posted: (52 years ago) Nov 30, 2020  · PET. 18 F-labelled fluorodeoxyglucose (18 F-FDG) is a glucose analogue positron emitting radiotracer with a half-life of approximately 110 minutes. Although best known for its applicability in the functional imaging of malignancies, there exists a growing role for the use of 18 F-FDG-PET in evaluation and characterization of infectious and inflammatory pulmonary conditions. 27, 39, 61 Prior ...

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How Does It Work?: Positron emission tomography

Posted: (52 years ago) Jun 28, 2003  · • Positron emission tomography (PET) is a technique that measures physiological function by looking at blood flow, metabolism, neurotransmitters, and radiolabelled drugs. PET offers quantitative analyses, allowing relative changes over time to be monitored as a disease process evolves or in response to a specific stimulus. stimulus.

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PET findings after COVID-19 vaccination: “Keep Calm and ...

Posted: (52 years ago) Mar 22, 2021  · Radiopharmaceutical uptake in axillary lymph nodes was also described after PET/CT with radiolabelled choline or somatostatin analogues in COVID-19 vaccination recipients [11, 16].We would like to underline that the main advantages of these case reports and small case series is to inform the nuclear medicine community about the increasing appearance of these PET findings following …

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Myocardial perfusion imaging with PET

Posted: (52 years ago) Feb 01, 2013  · PET-myocardial perfusion imaging (MPI) allows accurate measurement of myocardial perfusion, absolute myocardial blood flow and function at stress and rest in a single study session performed in approximately 30 min. Various PET tracers are available for MPI, and rubidium-82 or nitrogen-13-ammonia is most commonly used.

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PET/CT Standardized Uptake Values (SUVs) in Clinical ...

Posted: (52 years ago) 1. The use of Standardized Uptake Values in FDG-PET Imaging. PET/CT imaging of cancer with combined positron emission tomography (PET) and x-ray computerized tomography (CT) scanners has become a standard component of diagnosis and staging in oncology 1, 2.The use of the radiolabeled tracer 2-deoxy-2-[18 F]fluoro-D-glucose (FDG) for oncology imaging accounts for the majority of all …

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Positron emission tomography (PET) attenuation correction ...

Posted: (52 years ago) PET/CT imaging. Whole-body (WB) 18 F-FDG PET/CT scans were obtained on an mCT™ PET/CT scanner (Siemens Molecular Imaging, Hoffmann Estates, IL). Before imaging, patients fasted for at least 6 h. All patients had blood glucose levels below 150 mg dl −1 at the time of 18 F-FDG injection. 290±45 MBq of 18 F-FDG was intravenously injected 60 min before the scan.

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PET/CT in diagnosis of dementia

Posted: (52 years ago) Introduction. Positron emission tomography (PET) is now well established for clinical use in neurodegenerative disorders. Measurements of cerebral glucose metabolism, as done with [18 F]Fluorodeoxyglucose ([18 F]FDG) PET, are of unequivocal value in early diagnosis, differential diagnosis, and the evaluation of drug treatment for patients with dementia.

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Recent Advances and Future Progress in PET Instrumentation

Posted: (52 years ago) PET is an important and growing imaging modality. PET instrumentation has undergone a steady evolution improving various aspects of imaging. In this review, we discuss recent and future software and hardware technologies for PET/CT. The improvements include new hardware, incorporating designs with d …

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Brain PET in the Diagnosis of Alzheimer’s Disease

Posted: (52 years ago) Oct 04, 2016  · FDG-PET and amyloid PET imaging are valuable in the assessment of patients with Alzheimer’s disease. Identify patterns of FDG spatial distribution in brain PET of patients with MCI, AD, frontotemporal dementia, and dementia of Lewy Body. Identify the …

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Role of PET/CT in the Evaluation of Aortic Disease

Posted: (52 years ago) Sep 27, 2018  · Positron emission tomography (PET) /computed tomography (CT) has been established as a standard imaging modality in the evaluation of malignancy. Although PET/CT has played a major role in the management of oncology patients, its clinical use has also increased for various disorders other than malignancy.

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Recent Developments of 18F-FET PET in Neuro-oncology

Posted: (52 years ago) Background: From the past decade to date, several studies related to O-(2- [18F]fluoroethyl)-L-tyrosine (18F-FET) positron emission tomography (PET) in brain tumours have been published in the literature. Objective: The aim of this narrative review is to summarize the recent developments and the current role of 18F-FET PET in brain tumours according to recent literature data.

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Assessment of 68Ga-PSMA-11 PET Accuracy in Localizing ...

Posted: (52 years ago) Mar 28, 2019  · For PET/CT, a diagnostic CT was obtained with the use of a standard protocol (80 to 100 mA, 120 kV) before the PET scan. Intravenous iodinated contrast was administered to 613 (97%) patients. For PET/MRI, an abbreviated pelvis PET/MRI was obtained following a whole-body protocol after the PET scan, and the PET/MRI protocol was reported ...

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Fundamental Limits of Spatial Resolution in PET

Posted: (52 years ago) Aug 21, 2011  · The fundamental limits of spatial resolution in positron emission tomography (PET) have been understood for many years. The physical size of the detector element usually plays the dominant role in determining resolution, but the combined contributions from acollinearity, positron range, penetration into the detector ring, and decoding errors in the detector modules often combine to be of ...

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FDG PET and PET/CT: EANM procedure guidelines for tumour ...

Posted: (52 years ago) Nov 14, 2009  · Positron emission tomography (PET) is a tomographic technique that computes the three-dimensional distribution of radioactivity based on the annihilation photons that are emitted by positron emitter labelled radiotracers. PET allows non-invasive quantitative assessment of biochemical and functional processes.

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18F-FDG PET/CT Imaging In Oncology

Posted: (52 years ago) Positron emission tomography with 2-deoxy-2-[fluorine-18]fluoro- D-glucose integrated with computed tomography (18 F-FDG PET/CT) has emerged as a powerful imaging tool for the detection of various cancers. The combined acquisition of PET and CT has synergistic advantages over PET or CT alone and minimizes their individual limitations. It is a ...

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FDG PET and PET/CT

Posted: (52 years ago) FDG PET and PET/CT have been used for staging and re-staging tumour patients in numerous studies. This chapter will discuss the use and the main indications of FDG PET and PET/CT in oncology with special emphasis on lung cancer, oesophageal cancer, colorectal cancer, head and neck cancer, lymphoma and breast cancer (among other tumour entities).

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Image reconstruction for PET/CT scanners: past ...

Posted: (52 years ago) Oct 01, 2010  · PET is a medical imaging modality with proven clinical value for the detection, staging and monitoring of a wide variety of diseases. This technique requires the injection of a radiotracer, which is then monitored externally to generate PET data [1,2].Through different algorithms, PET data can be reconstructed into the spatial distribution of a radiotracer.

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PET image denoising using unsupervised deep learning

Posted: (52 years ago) Positron emission tomography (PET) is a powerful functional imaging modality which can detect molecular-level activity in the tissue by specific tracers. It has wide applications in oncology [ 1 , 2 ], cardiology [ 3 ] and neurology [ 4 , 5 ], but still suffers from the low signal-to-noise ratio (SNR) which affects its detection and ...

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PET/MRI: THE NEXT GENERATION OF MULTI-MODALITY IMAGING?

Posted: (52 years ago) PET/MRI will allow elimination of the CT x-ray dose, which generally accounts for most of the dose associated with a PET/CT scan . With PET/MRI, therefore, clinicians might be more amenable to follow-up studies and screening. Thus, PET/MRI might emerge as the modality of choice in clinical oncology.

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PET/CT in Multiple Myeloma: Beyond FDG

Posted: (52 years ago) Jan 25, 2021  · A prospective comparison of 18F-fluorodeoxyglucose positron emission tomography-computed tomography, magnetic resonance imaging and whole-body planar radiographs in the assessment of bone disease in newly diagnosed multiple myeloma. Haematologica (2007) 92 (1):50–5. 10.3324/haematol.10554 [Google Scholar]

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Data acquisition in PET imaging

Posted: (52 years ago) Data acquisition is substantially different in PET than it is in planar nuclear medicine and SPECT. There is an entirely different set of definitions and considerations. The objective of this paper is to provide the reader with the terminology and understanding of how PET data are acquired and organ …

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Pictorial essay: PET/CT in tuberculosis

Posted: (52 years ago) PET may help in determining the activity in the lesions, define the extent of disease, and aid in assessing the response to therapy. High FDG uptake has been reported in tuberculomas [Figure 4]. Figure 4 (A-D) Pulmonary tuberculoma. Axial lung (A) and mediastinal window (C) CT images show a soft tissue density nodule in the right upper lobe of ...

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Roadmap toward the 10 ps time-of-flight PET challenge

Posted: (52 years ago) Since the seventies, positron emission tomography (PET) has become an invaluable medical molecular imaging modality with an unprecedented sensitivity at the picomolar level, especially for cancer diagnosis and the monitoring of its response to therapy. More recently, its combination with x-ray compu …

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Physical principles and technology of clinical PET imaging

Posted: (52 years ago) PET imaging technology has now improved to where a combined anatomical and functional clinical study can be completed in less than 10 minutes--although taking advantage of such high throughput potential will challenge patient management in diagnostic imaging departments.

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The role of PET/CT in cervical cancer

Posted: (52 years ago) Feb 26, 2013  · Positron emission tomography – computed tomography has gained importance in determining prognosis, assessing treatment response and evaluation of disease recurrence. The use of FDG-PET/CT is important to accurately define radiotherapy volumes, spare active bone marrow from high doses of radiation, and deliver more precise brachytherapy.

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PET/CT scanner instrumentation, challenges, and solutions

Posted: (52 years ago) PET/CT scanners offer a hardware solution for aligning and viewing functional and anatomic images that is immune to many of the errors in strictly software registration techniques. Moreover, PET attenuation-corrected emission scans benefit from the use of the onboard CT for fast, low-noise attenuati …

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PET imaging of neural activity, β-amyloid, and tau in ...

Posted: (52 years ago) Positron emission tomography (PET) with radiotracers targeting these age-related changes has been increasingly employed to clarify the sequence of their occurrence and the evolution of clinically cognitive deficits. Herein, we reviewed recent literature on PET-based imaging of normal human brain aging in terms of neural activity, Aβ, and tau.

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Plant-based (vegan) diets for pets: A survey of pet owner ...

Posted: (52 years ago) Jan 15, 2019  · Pet owner diet was thus excluded from predictive models, and binary logistic regression was employed to determine what factors were associated with vegan pet owners feeding their pets a plant-based diet. Variables offered initially to the model included: age, gender, ...

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Clinical applications: MRI, SPECT, and PET

Posted: (52 years ago) MRI, PET, and SPECT are all used to image abnormalities in the epileptic brain. Comparison of the techniques is difficult because they measure different aspects of the epileptic process--structure, metabolism, and perfusion. SPECT is the only one that can be systematically applied during seizures, w …

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Optimisation of whole-body PET/CT scanning protocols

Posted: (52 years ago) Apr 01, 2007  · Positron emission tomography (PET) has become one of the major tools for the in vivo localisation of positron-emitting tracers and now is performed routinely using 18 F-fluorodeoxyglucose (FDG) to answer important clinical questions including those in cardiology, neurology, psychiatry, and oncology. The latter application contributed largely to the wide acceptance of this imaging modality …

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Comparison of Coronary CT Angiography, SPECT, PET, and ...

Posted: (52 years ago) Oct 18, 2017  · Importance. At present, the choice of noninvasive testing for a diagnosis of significant coronary artery disease (CAD) is ambiguous, but nuclear myocardial perfusion imaging with single-photon emission tomography (SPECT) or positron emission tomography (PET) and coronary computed tomography angiography (CCTA) is predominantly used for this purpose.

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FDG PET imaging in multiple myeloma: implications for ...

Posted: (52 years ago) Dec 20, 2018  · PET images from skull vertex to feet were then acquired after a one hour delay. Also acquired was a contemporaneous low dose non-contrast CT scan performed for attenuation correction of PET images and anatomic localization. The PET and CT images were digitally fused for display and all images were acquired on a combined PET-CT scanner unit.

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Use of PET/CT scanning in cancer patients: technical and ...

Posted: (52 years ago) The accuracy of integrated PET/CT was 84% to 93%, which is a very small incremental improvement over that of stand-alone PET;however, PET/CT increased the certainty of findings in 22% to 32% of patients—an important factor in terms of the direction and cost of further workup and therapy (4, 7, 8).

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18F-fluorodeoxyglucose (FDG) PET or 18F-fluorothymidine ...

Posted: (52 years ago) Aug 23, 2021  · Methods. In two separate studies, women with early stage ER+ breast cancer underwent either paired FDG-PET (n = 22) or FLT-PET (n = 27) scans prior to endocrine therapy and again in the pre-operative setting.Tissue samples for Ki-67 were taken for all patients both prior to treatment and at the time of surgery.

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FDG-PET/CT in lymphoma - PubMed Central (PMC)

Posted: (52 years ago) PET/CT in Initial Staging. Staging of lymphomas is a vital pre-requisite to their appropriate therapeutic management and prognostication. This is based on the Ann Arbor system, to which has been added a definition of bulky disease called the Cotswald modification.[] Imaging modalities have a fundamental role in the staging of lymphomas.

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18F-FDG brain PET hypometabolism in patients with long COVID

Posted: (52 years ago) Nov 29, 2020  · PET scans of 35 patients with long COVID were compared using whole-brain voxel-based analysis to a local database of 44 healthy subjects controlled for age and sex to characterize cerebral hypometabolism. The individual relevance of this metabolic profile was evaluated to classify patients and healthy subjects.

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[18F]FDG uptake of axillary lymph nodes after COVID-19 ...

Posted: (52 years ago) The PET acquisition time was 2 min per bed position, with 6–11 bed positions per patient (depending on patient size), using an overlap of 23% (17 slices). The PET was acquired in 3D mode and slice thickness was 2.79 mm. PET reconstructions were generated using penalized likelihood reconstruction (Q.Clear, GE Healthcare) with a β-value of 450 ...

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Appropriateness criteria of FDG PET/CT in oncology

Posted: (52 years ago) Positron emission tomography/computerized tomography (PET/CT) is a technological advancement having a significant impact in oncology. 18 Fluorine-2-fluoro-2-deoxy-D-glucose (18 F-FDG) is an expensive, short-lived radiopharmaceutical used for PET/CT scanning and …

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