scholarly journals EANM procedure guidelines for brain PET imaging using [18F]FDG, version 3

2021 ◽  
Author(s):  
Eric Guedj ◽  
Andrea Varrone ◽  
Ronald Boellaard ◽  
Nathalie L. Albert ◽  
Henryk Barthel ◽  
...  
Keyword(s):  
Pet Imaging ◽  
Fdg Pet ◽  
Quality Standard ◽  
Local Conditions ◽  
Procedure Guidelines ◽  
Digital Pet ◽  
Patient Preparation ◽  
High Quality Standard ◽  
Neuro Imaging ◽  
New Guidelines

AbstractThe present procedural guidelines summarize the current views of the EANM Neuro-Imaging Committee (NIC). The purpose of these guidelines is to assist nuclear medicine practitioners in making recommendations, performing, interpreting, and reporting results of [18F]FDG-PET imaging of the brain. The aim is to help achieve a high-quality standard of [18F]FDG brain imaging and to further increase the diagnostic impact of this technique in neurological, neurosurgical, and psychiatric practice. The present document replaces a former version of the guidelines that have been published in 2009. These new guidelines include an update in the light of advances in PET technology such as the introduction of digital PET and hybrid PET/MR systems, advances in individual PET semiquantitative analysis, and current broadening clinical indications (e.g., for encephalitis and brain lymphoma). Further insight has also become available about hyperglycemia effects in patients who undergo brain [18F]FDG-PET. Accordingly, the patient preparation procedure has been updated. Finally, most typical brain patterns of metabolic changes are summarized for neurodegenerative diseases. The present guidelines are specifically intended to present information related to the European practice. The information provided should be taken in the context of local conditions and regulations.

scholarly journals FDG PET and PET/CT: EANM procedure guidelines for tumour PET imaging: version 1.0

2009 ◽  
Vol 37 (1) ◽  
pp. 181-200 ◽  
Author(s):  
Ronald Boellaard ◽  
Mike J. O’Doherty ◽  
Wolfgang A. Weber ◽  
Felix M. Mottaghy ◽  
Markus N. Lonsdale ◽  
...  
Keyword(s):  
Pet Imaging ◽  
Fdg Pet ◽  
Procedure Guidelines ◽  
Pet Ct

Crossed Cerebellar Diaschisis in Alzheimer’s Disease

2018 ◽  
Vol 15 (13) ◽  
pp. 1267-1275 ◽  
Author(s):  
F.E. Reesink ◽  
D. Vállez García ◽  
C.A. Sánchez-Catasús ◽  
D.E. Peretti ◽  
A.T. Willemsen ◽  
...  
Keyword(s):  
Alzheimer’S Disease ◽  
Alzheimer's Disease ◽  
Left Hemisphere ◽  
Pet Imaging ◽  
Fdg Pet ◽  
Pathophysiological Mechanism ◽  
Crossed Cerebellar Diaschisis ◽  
Amyloid Accumulation ◽  
Cerebellar Diaschisis ◽  
18F Fdg

Background: We describe the phenomenon of crossed cerebellar diaschisis (CCD) in four subjects diagnosed with Alzheimer’s disease (AD) according to the National Institute on Aging - Alzheimer Association (NIA-AA) criteria, in combination with 18F-FDG PET and 11C-PiB PET imaging. Methods: 18F-FDG PET showed a pattern of cerebral metabolism with relative decrease most prominent in the frontal-parietal cortex of the left hemisphere and crossed hypometabolism of the right cerebellum. 11C-PiB PET showed symmetrical amyloid accumulation, but a lower relative tracer delivery (a surrogate of relative cerebral blood flow) in the left hemisphere. CCD is the phenomenon of unilateral cerebellar hypometabolism as a remote effect of supratentorial dysfunction of the brain in the contralateral hemisphere. The mechanism implies the involvement of the cortico-ponto-cerebellar fibers. The pathophysiology is thought to have a functional or reversible basis but can also reflect in secondary morphologic change. CCD is a well-recognized phenomenon, since the development of new imaging techniques, although scarcely described in neurodegenerative dementias. Results: To our knowledge this is the first report describing CCD in AD subjects with documentation of both 18F-FDG PET and 11C-PiB PET imaging. CCD in our subjects was explained on a functional basis due to neurodegenerative pathology in the left hemisphere. There was no structural lesion and the symmetric amyloid accumulation did not correspond with the unilateral metabolic impairment. Conclusion: This suggests that CCD might be caused by non-amyloid neurodegeneration. The pathophysiological mechanism, clinical relevance and therapeutic implications of CCD and the role of the cerebellum in AD need further investigation.

scholarly journals CT, MRI, and FDG-PET imaging findings of low-grade extrauterine endometrial stromal sarcoma arising from the mesentery: A case report

2021 ◽  
Vol 16 (9) ◽  
pp. 2774-2779
Author(s):  
Satoshi Suzuki ◽  
Ryo Kurokawa ◽  
Tetsushi Tsuruga ◽  
Mayuyo Mori‑Uchino ◽  
Haruka Nishida ◽  
...  
Keyword(s):  
Case Report ◽  
Pet Imaging ◽  
Fdg Pet ◽  
Endometrial Stromal Sarcoma ◽  
Low Grade ◽  
Imaging Findings ◽  
Stromal Sarcoma

scholarly journals Identifying degenerative effects of repetitive head trauma with neuroimaging: a clinically-oriented review

2021 ◽  
Vol 9 (1) ◽  
Author(s):  
Breton M. Asken ◽  
Gil D. Rabinovici
Keyword(s):  
Head Trauma ◽  
Pet Imaging ◽  
Fdg Pet ◽  
Chronic Traumatic Encephalopathy ◽  
Structural Mri ◽  
Disease Diagnosis ◽  
Underlying Disease ◽  
American Football ◽  
Cavum Septum Pellucidum ◽  
Tau Pet

Abstract Background and Scope of Review Varying severities and frequencies of head trauma may result in dynamic acute and chronic pathophysiologic responses in the brain. Heightened attention to long-term effects of head trauma, particularly repetitive head trauma, has sparked recent efforts to identify neuroimaging biomarkers of underlying disease processes. Imaging modalities like structural magnetic resonance imaging (MRI) and positron emission tomography (PET) are the most clinically applicable given their use in neurodegenerative disease diagnosis and differentiation. In recent years, researchers have targeted repetitive head trauma cohorts in hopes of identifying in vivo biomarkers for underlying biologic changes that might ultimately improve diagnosis of chronic traumatic encephalopathy (CTE) in living persons. These populations most often include collision sport athletes (e.g., American football, boxing) and military veterans with repetitive low-level blast exposure. We provide a clinically-oriented review of neuroimaging data from repetitive head trauma cohorts based on structural MRI, FDG-PET, Aβ-PET, and tau-PET. We supplement the review with two patient reports of neuropathology-confirmed, clinically impaired adults with prior repetitive head trauma who underwent structural MRI, FDG-PET, Aβ-PET, and tau-PET in addition to comprehensive clinical examinations before death. Review Conclusions Group-level comparisons to controls without known head trauma have revealed inconsistent regional volume differences, with possible propensity for medial temporal, limbic, and subcortical (thalamus, corpus callosum) structures. Greater frequency and severity (i.e., length) of cavum septum pellucidum (CSP) is observed in repetitive head trauma cohorts compared to unexposed controls. It remains unclear whether CSP predicts a particular neurodegenerative process, but CSP presence should increase suspicion that clinical impairment is at least partly attributable to the individual’s head trauma exposure (regardless of underlying disease). PET imaging similarly has not revealed a prototypical metabolic or molecular pattern associated with repetitive head trauma or predictive of CTE based on the most widely studied radiotracers. Given the range of clinical syndromes and neurodegenerative pathologies observed in a subset of adults with prior repetitive head trauma, structural MRI and PET imaging may still be useful for differential diagnosis (e.g., assessing suspected Alzheimer’s disease).

scholarly journals Automated quantification of baseline imaging PET metrics on FDG PET/CT images of pediatric Hodgkin lymphoma patients

2020 ◽  
Vol 7 (1) ◽  
Author(s):  
Amy J. Weisman ◽  
Jihyun Kim ◽  
Inki Lee ◽  
Kathleen M. McCarten ◽  
Sandy Kessel ◽  
...  
Keyword(s):  
Hodgkin Lymphoma ◽  
Correlation Coefficient ◽  
Pet Imaging ◽  
Fdg Pet ◽  
Relative Difference ◽  
Ct Images ◽  
Imaging Features ◽  
Pediatric Hodgkin Lymphoma ◽  
Pet Ct ◽  
Fdg Pet Ct

Abstract Purpose For pediatric lymphoma, quantitative FDG PET/CT imaging features such as metabolic tumor volume (MTV) are important for prognosis and risk stratification strategies. However, feature extraction is difficult and time-consuming in cases of high disease burden. The purpose of this study was to fully automate the measurement of PET imaging features in PET/CT images of pediatric lymphoma. Methods 18F-FDG PET/CT baseline images of 100 pediatric Hodgkin lymphoma patients were retrospectively analyzed. Two nuclear medicine physicians identified and segmented FDG avid disease using PET thresholding methods. Both PET and CT images were used as inputs to a three-dimensional patch-based, multi-resolution pathway convolutional neural network architecture, DeepMedic. The model was trained to replicate physician segmentations using an ensemble of three networks trained with 5-fold cross-validation. The maximum SUV (SUVmax), MTV, total lesion glycolysis (TLG), surface-area-to-volume ratio (SA/MTV), and a measure of disease spread (Dmaxpatient) were extracted from the model output. Pearson’s correlation coefficient and relative percent differences were calculated between automated and physician-extracted features. Results Median Dice similarity coefficient of patient contours between automated and physician contours was 0.86 (IQR 0.78–0.91). Automated SUVmax values matched exactly the physician determined values in 81/100 cases, with Pearson’s correlation coefficient (R) of 0.95. Automated MTV was strongly correlated with physician MTV (R = 0.88), though it was slightly underestimated with a median (IQR) relative difference of − 4.3% (− 10.0–5.7%). Agreement of TLG was excellent (R = 0.94), with median (IQR) relative difference of − 0.4% (− 5.2–7.0%). Median relative percent differences were 6.8% (R = 0.91; IQR 1.6–4.3%) for SA/MTV, and 4.5% (R = 0.51; IQR − 7.5–40.9%) for Dmaxpatient, which was the most difficult feature to quantify automatically. Conclusions An automated method using an ensemble of multi-resolution pathway 3D CNNs was able to quantify PET imaging features of lymphoma on baseline FDG PET/CT images with excellent agreement to reference physician PET segmentation. Automated methods with faster throughput for PET quantitation, such as MTV and TLG, show promise in more accessible clinical and research applications.

scholarly journals Comparative Study of Iran and the UK national curriculum based on the principles of Mind, Brain and Education

2019 ◽  
Vol 8 (1) ◽  
pp. 46
Author(s):  
Nazanin Reza Zadeh Mottaghi ◽  
Mahmoud Talkhabi
Keyword(s):  
Educational System ◽  
Teaching And Learning ◽  
National Curriculum ◽  
Quality Standard ◽  
Thinking Skills ◽  
Reflective Practices ◽  
Science Of Mind ◽  
High Quality Standard ◽  
The Uk ◽  
Collaborative Activities

This study compares the national curriculum of Iran and the UK to find out how the educational system indeveloping countries such as Iran can be improved. Because of implementing thinking skills and cognitive education,the educational system in the UK benefits from a high-quality standard. The science of mind, brain, educationintroduces some principles to improve teaching and learning methods and provide thoughtful and lifelong learnersfor the societies. In this study, we specified the main parts of the national curriculum in both countries and selectedsome of the principles to determine whether these two countries apply them in their national curriculum. Some ofthese principles focus on some significant issues: teaching models, the use of Meta-discipline and HolisticTechniques, authentic learning experiences, use of products, processing and progressing Evaluations, developingexplicit learning objectives, how to benefit from thinking and reflective practices, using collaborative and democraticactivities, preparing students to set personal objectives, giving themselves feedbacks, technology and flippedclassrooms, and beginning Year- Round Schooling. The results show that Iran needs more precise and detailedlearning objectives in its curriculum, use of democratic and collaborative activities with academics and students,develop thinking and reflective practices which play vital roles in upgrading the educational system. Moreover, it issuggested that the UK and Iran should consider embedded evaluations and flipped classrooms to meet the needs ofnew generation of learners.

Sign in / Sign up

Export Citation Format

Share Document