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  1. Article ; Online: Respiratory Gating and the Performance of PET/CT in Pulmonary Lesions.

    Crivellaro, Cinzia / Guerra, Luca

    Current radiopharmaceuticals

    2020  Volume 13, Issue 3, Page(s) 218–227

    Abstract: Background: Motion artifacts related to the patient's breathing can be the cause of underestimation of the lesion uptake and can lead to missing of small lung lesions. The respiratory gating (RG) technology has demonstrated a significant increase in ... ...

    Abstract Background: Motion artifacts related to the patient's breathing can be the cause of underestimation of the lesion uptake and can lead to missing of small lung lesions. The respiratory gating (RG) technology has demonstrated a significant increase in image quality.
    Objective: The aim of this paper was to evaluate the advantages of RG technique on PET/CT performance in lung lesions. The impact of 4D-PET/CT on diagnosis (metabolic characterization), staging and re-staging lung cancer was also assessed, including its application for radiotherapy planning. Finally, new technologies for respiratory motion management were also discussed.
    Methods: A comprehensive electronic search of the literature was performed by using Medline database (PubMed) searching "PET/CT", "gated" and "lung". Original articles, review articles, and editorials published in the last 10 years were selected, included and critically reviewed in order to select relevant articles.
    Results: Many papers compared Standardized Uptake Value (SUV) in gated and ungated PET studies showing an increase in SUV of gated images, particularly for the small lesions located in medium and lower lung. In addition, other features as Metabolic Tumor Volume (MTV), Total Lesion Glycolysis (TLG) and textural-features presented differences when obtained from gated and ungated PET acquisitions. Besides the increase in quantification, gating techniques can determine an increase in the diagnostic accuracy of PET/CT. Gated PET/CT was evaluated for lung cancer staging, therapy response assessment and for radiation therapy planning.
    Conclusion: New technologies able to track the motion of organs lesion directly from raw PET data, can reduce or definitively solve problems (i.e.: extended acquisition time, radiation exposure) currently limiting the use of gated PET/CT in clinical routine.
    MeSH term(s) Artifacts ; Humans ; Lung Neoplasms/diagnostic imaging ; Lung Neoplasms/pathology ; Neoplasm Staging ; Positron Emission Tomography Computed Tomography/methods ; Radiopharmaceuticals ; Radiotherapy Planning, Computer-Assisted ; Respiratory-Gated Imaging Techniques/methods ; Tumor Burden
    Chemical Substances Radiopharmaceuticals
    Language English
    Publishing date 2020-04-16
    Publishing country United Arab Emirates
    Document type Journal Article ; Review
    ISSN 1874-4729
    ISSN (online) 1874-4729
    DOI 10.2174/1874471013666200317144629
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article ; Online: A cognitive marker for Alzheimer disease pathology in primary progressive aphasia? A validation study in the clinical setting.

    Isella, Valeria / Licciardo, Daniele / Rebecchi, Gaia / Ferri, Francesca / Crivellaro, Cinzia / Appollonio, Ildebrando / Ferrarese, Carlo

    Neurobiology of aging

    2023  Volume 131, Page(s) 153–155

    Abstract: We validated in the clinical setting a putative clinical marker for a biological diagnosis of primary progressive aphasia (PPA) due to amyloid previously identified in an autopsy cohort and including impaired (score ≤4) digit span (DS) as index of ... ...

    Abstract We validated in the clinical setting a putative clinical marker for a biological diagnosis of primary progressive aphasia (PPA) due to amyloid previously identified in an autopsy cohort and including impaired (score ≤4) digit span (DS) as index of phonological loop dysfunction and broadened criteria for logopenic PPA. In 29 PPA patients with an amyloid-positive (A+) biomarker and 28 PPA patients with an amyloid-negative (A-) biomarker, Receiver Operating Characteristics (ROC) curve analysis showed moderate specificity (71%) but insufficient sensitivity (41%) for the proposed marker. Specificity was particularly poor (58%) for the discrimination between A+ PPA and the A- subgroup with nonfluent PPA. DS may be compromised in both logopenic and nonfluent PPA, whose loci of neurodegeneration lie at the 2 ends of the left fronto-parieto-temporal system that underpins phonology. An Statistical Parametric Mapping (SPM) correlation analysis between DS score and metabolism on brain 18-fluoro-deoxy-glucose positron emission tomography also showed a major contribution of the left frontal cortex to impaired span.
    MeSH term(s) Humans ; Alzheimer Disease/diagnostic imaging ; Alzheimer Disease/pathology ; Aphasia, Primary Progressive/diagnostic imaging ; Aphasia, Primary Progressive/pathology ; Neuropsychological Tests ; Brain/metabolism ; Primary Progressive Nonfluent Aphasia/diagnosis ; Biomarkers ; Cognition
    Chemical Substances Biomarkers
    Language English
    Publishing date 2023-07-16
    Publishing country United States
    Document type Journal Article
    ZDB-ID 604505-4
    ISSN 1558-1497 ; 0197-4580
    ISSN (online) 1558-1497
    ISSN 0197-4580
    DOI 10.1016/j.neurobiolaging.2023.07.003
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  3. Article: Reduced phonemic fluency in progressive supranuclear palsy is due to dysfunction of dominant BA6.

    Isella, Valeria / Licciardo, Daniele / Ferri, Francesca / Crivellaro, Cinzia / Morzenti, Sabrina / Appollonio, Ildebrando / Ferrarese, Carlo

    Frontiers in aging neuroscience

    2022  Volume 14, Page(s) 969875

    Abstract: Background: Reduced phonemic fluency is extremely frequent in progressive supranuclear palsy (PSP), but its neural correlate is yet to be defined.: Objective: We explored the hypothesis that poor fluency in PSP might be due to neurodegeneration ... ...

    Abstract Background: Reduced phonemic fluency is extremely frequent in progressive supranuclear palsy (PSP), but its neural correlate is yet to be defined.
    Objective: We explored the hypothesis that poor fluency in PSP might be due to neurodegeneration within a dominant frontal circuit known to be involved in speech fluency, including the opercular area, the superior frontal cortex (BA6), and the frontal aslant tract connecting these two regions.
    Methods: We correlated performance on a letter fluency task (F, A, and S, 60 s for each letter) with brain metabolism as measured with Fluoro-deoxy-glucose Positron Emission Tomography, using Statistical Parametric Mapping, in 31 patients with PSP.
    Results: Reduced letter fluency was associated with significant hypometabolism at the level of left BA6.
    Conclusion: Our finding is the first evidence that in PSP, as in other neurogical disorders, poor self-initiated, effortful verbal retrieval appears to be linked to dysfunction of the dominant opercular-aslant-BA6 circuit.
    Language English
    Publishing date 2022-09-08
    Publishing country Switzerland
    Document type Journal Article
    ZDB-ID 2558898-9
    ISSN 1663-4365
    ISSN 1663-4365
    DOI 10.3389/fnagi.2022.969875
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  4. Article ; Online: Left and right corticobasal syndrome: comparison of cognitive profiles between metabolic imaging - matched groups.

    Isella, Valeria / Licciardo, Daniele / Ferri, Francesca / Crivellaro, Cinzia / Morzenti, Sabrina / Appollonio, Ildebrando Marco / Ferrarese, Carlo

    Neurological sciences : official journal of the Italian Neurological Society and of the Italian Society of Clinical Neurophysiology

    2023  Volume 45, Issue 4, Page(s) 1499–1506

    Abstract: Background: Corticobasal syndrome (CBS) is typically asymmetric. Case reports suggest that left-hemisphere CBS (lhCBS) is associated with major language impairment, and right-hemisphere CBS (rhCBS) is associated with major visuospatial deficits, but no ... ...

    Abstract Background: Corticobasal syndrome (CBS) is typically asymmetric. Case reports suggest that left-hemisphere CBS (lhCBS) is associated with major language impairment, and right-hemisphere CBS (rhCBS) is associated with major visuospatial deficits, but no group study has ever verified these observations. In our study, we enrolled 49 patients with CBS, classified them as lhCBS or rhCBS based on asymmetry of hypometabolism on brain FDG-PET and compared their cognitive and behavioural profiles.
    Methods: We defined asymmetry of hypometabolism upon visual inspection of qualitative PET images and confirmed it through paired comparison of left- and right-hemisphere FDG uptake values. The two groups were also matched for severity of hypometabolism within the more affected and more preserved hemispheres, to unravel differences in the cognitive profiles ascribable specifically to each hemisphere's functional specializations. All patients were assessed for memory, language, executive and visuospatial deficits, apraxia, neglect, dyscalculia, agraphia and behavioural disturbances.
    Results: LhCBS (n. 26) and rhCBS (n. 23) patients did not differ for demographics, disease duration and severity of global cognitive impairment. The two cognitive profiles were largely overlapping, with two exceptions: Digit span forward was poorer in lhCBS, and visual neglect was more frequent in rhCBS.
    Conclusions: After balancing out patients for hemispheric hypometabolism, we did not confirm worse language or visuospatial deficits in, respectively, lhCBS and rhCBS. However, verbal short-term memory was more impaired in lhCBS, and spatial attention was more impaired in rhCBS. Both of these functions reflect the functional specialization of the left and right fronto-parietal pathways, i.e. of the main loci of neurodegeneration in CBS.
    MeSH term(s) Humans ; Fluorodeoxyglucose F18 ; Corticobasal Degeneration ; Research Design ; Brain/metabolism ; Positron-Emission Tomography ; Cognition
    Chemical Substances Fluorodeoxyglucose F18 (0Z5B2CJX4D)
    Language English
    Publishing date 2023-10-27
    Publishing country Italy
    Document type Journal Article
    ZDB-ID 2016546-8
    ISSN 1590-3478 ; 1590-1874
    ISSN (online) 1590-3478
    ISSN 1590-1874
    DOI 10.1007/s10072-023-07148-2
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  5. Article ; Online: Clinical and neuroimaging characterization of the first frontotemporal dementia family carrying the MAPT p.K298E mutation.

    Pozzi, Federico Emanuele / Aprea, Vittoria / Giovannelli, Ginevra / Lattuada, Francesca / Crivellaro, Cinzia / Bertola, Francesca / Castelnovo, Veronica / Canu, Elisa / Filippi, Massimo / Appollonio, Ildebrando / Ferrarese, Carlo / Agosta, Federica / Tremolizzo, Lucio

    Neurogenetics

    2024  

    Abstract: We present an in-depth clinical and neuroimaging analysis of a family carrying the MAPT K298E mutation associated with frontotemporal dementia (FTD). Initial identification of this mutation in a single clinical case led to a comprehensive investigation ... ...

    Abstract We present an in-depth clinical and neuroimaging analysis of a family carrying the MAPT K298E mutation associated with frontotemporal dementia (FTD). Initial identification of this mutation in a single clinical case led to a comprehensive investigation involving four affected siblings allowing to elucidate the mutation's phenotypic expression.A 60-year-old male presented with significant behavioral changes and progressed rapidly, exhibiting speech difficulties and cognitive decline. Neuroimaging via FDG-PET revealed asymmetrical frontotemporal hypometabolism. Three siblings subsequently showed varied but consistent clinical manifestations, including abnormal behavior, speech impairments, memory deficits, and motor symptoms correlating with asymmetric frontotemporal atrophy observed in MRI scans.Based on the genotype-phenotype correlation, we propose that the p.K298E mutation results in early-onset behavioral variant FTD, accompanied by a various constellation of speech and motor impairment.This detailed characterization expands the understanding of the p.K298E mutation's clinical and neuroimaging features, underlining its role in the pathogenesis of FTD. Further research is crucial to comprehensively delineate the clinical and epidemiological implications of the MAPT p.K298E mutation.
    Language English
    Publishing date 2024-04-09
    Publishing country United States
    Document type Journal Article
    ZDB-ID 1339887-8
    ISSN 1364-6753 ; 1364-6745
    ISSN (online) 1364-6753
    ISSN 1364-6745
    DOI 10.1007/s10048-024-00756-w
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  6. Article ; Online: The heterogeneity of lung perfusion patterns in SPECT/CT during COVID-19: not only embolism.

    Monaco, Lavinia / Crivellaro, Cinzia / Cressoni, Massimo / Foti, Giuseppe / Landoni, Claudio / Messa, Cristina / Guerra, Luca

    European journal of nuclear medicine and molecular imaging

    2021  Volume 48, Issue 10, Page(s) 3020–3021

    MeSH term(s) COVID-19 ; Embolism ; Humans ; Lung/diagnostic imaging ; Perfusion ; SARS-CoV-2 ; Single Photon Emission Computed Tomography Computed Tomography
    Language English
    Publishing date 2021-05-05
    Publishing country Germany
    Document type Letter ; Comment
    ZDB-ID 8236-3
    ISSN 1619-7089 ; 0340-6997 ; 1619-7070
    ISSN (online) 1619-7089
    ISSN 0340-6997 ; 1619-7070
    DOI 10.1007/s00259-021-05377-1
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  7. Article ; Online: Clinical Application of a High Sensitivity BGO PET/CT Scanner: Effects of Acquisition Protocols and Reconstruction Parameters on Lesions Quantification.

    De Ponti, Elena / Crivellaro, Cinzia / Morzenti, Sabrina / Monaco, Lavinia / Todde, Sergio / Landoni, Claudio / Elisei, Federica / Musarra, Monica / Guerra, Luca

    Current radiopharmaceuticals

    2022  Volume 15, Issue 3, Page(s) 218–227

    Abstract: Aims: The aim of this retrospective study was to investigate SUVs variability with respect to lesion size, administered dose, and reconstruction algorithm.: Background: SUV: Objective: To fulfill the aim, we evaluated the SUVs variability with ... ...

    Abstract Aims: The aim of this retrospective study was to investigate SUVs variability with respect to lesion size, administered dose, and reconstruction algorithm.
    Background: SUV
    Objective: To fulfill the aim, we evaluated the SUVs variability with respect to lesion size, administered dose, and reconstruction algorithm (ordered - subset expectation
    Methods: Discovery IQ scanner (GE Healthcare, Milwaukee, Wisconsin, US) was used for list mode acquisition of 25 FDG patients, 12 injected with 3.7 MBq/kg (Standard Dose protocol - SD) and 13 injected with 1.8 MBq/kg (Low Dose protocol - LD). Each acquisition was reconstructed at different time/FOV with both OSEM+PSF algorithm and BPL using seven different beta factors. SUVs were calculated in 70 lesions and analysed in function of time/FOV and Beta. Image quality was evaluated as a coefficient of variation of the liver (CV - liver).
    Results: SUVs were not considerably affected by time/FOV. However, SUVs were influenced by beta: differences were higher in small lesions (37% for SUV
    Conclusion: When a high sensitivity 5 - rings BGO PET/CT scanner is used with the same reconstruction algorithm, quantification by means of SUV
    MeSH term(s) Bayes Theorem ; Fluorodeoxyglucose F18 ; Humans ; Image Processing, Computer-Assisted/methods ; Positron Emission Tomography Computed Tomography ; Radiopharmaceuticals ; Retrospective Studies
    Chemical Substances Radiopharmaceuticals ; Fluorodeoxyglucose F18 (0Z5B2CJX4D)
    Language English
    Publishing date 2022-03-04
    Publishing country United Arab Emirates
    Document type Journal Article
    ISSN 1874-4729
    ISSN (online) 1874-4729
    DOI 10.2174/1874471015666220107100200
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  8. Article: Depressive Pseudodementia with Reversible AD-like Brain Hypometabolism: A Case Report and a Review of the Literature.

    Pozzi, Federico Emanuele / Licciardo, Daniele / Musarra, Monica / Jonghi-Lavarini, Lorenzo / Crivellaro, Cinzia / Basso, Gianpaolo / Appollonio, Ildebrando / Ferrarese, Carlo

    Journal of personalized medicine

    2022  Volume 12, Issue 10

    Abstract: Recent European guidelines recommend using brain FDG-PET to differentiate between Alzheimer's disease (AD) and depressive pseudodementia (DP), with specific hypometabolism patterns across the former group, and typically normal or frontal hypometabolism ... ...

    Abstract Recent European guidelines recommend using brain FDG-PET to differentiate between Alzheimer's disease (AD) and depressive pseudodementia (DP), with specific hypometabolism patterns across the former group, and typically normal or frontal hypometabolism in the latter. We report the case of a 74 years-old man with DP (MMSE 16/30), whose FDG-PET visual rating and semiquantitative analysis closely mimicked the typical AD pattern, showing severe hypometabolism in bilateral precuneus, parietal and temporal lobes, and sparing frontal areas, suggesting the diagnosis of moderate AD. Shortly after starting antidepressant polytherapy, he underwent formal NPS testing, which revealed moderate impairment of episodic memory and mild impairment on executive and visuospatial tests, judged consistent with neurodegenerative dementia and concomitant depression. Over the following two years, he improved dramatically: repeated NPS assessment did not show significant deficits, and FDG-PET showed restoration of cerebral metabolism. The confirmation of PET findings via semiquantitative analysis, and their reversion to normality with antidepressant treatment, proved the non-neurodegenerative origin of the initial AD-like FDG-PET abnormalities. We review similar cases and provide a comprehensive analysis of their implications, concluding that reversible FDG-PET widespread hypometabolism might represent a biomarker of pseudodementia. Therefore, we suggest caution when interpreting FDG-PET scans of depressed patients with cognitive impairment.
    Language English
    Publishing date 2022-10-06
    Publishing country Switzerland
    Document type Case Reports
    ZDB-ID 2662248-8
    ISSN 2075-4426
    ISSN 2075-4426
    DOI 10.3390/jpm12101665
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  9. Article: A ROI-based quantitative pipeline for

    Cerina, Valeria / Crivellaro, Cinzia / Morzenti, Sabrina / Pozzi, Federico E / Bigiogera, Vittorio / Jonghi-Lavarini, Lorenzo / Moresco, Rosa M / Basso, Gianpaolo / De Bernardi, Elisabetta

    Heliyon

    2023  Volume 10, Issue 1, Page(s) e23340

    Abstract: In Mild Cognitive Impairment (MCI), the study of brain metabolism, provided by 18F-FluoroDeoxyGlucose Positron Emission Tomography ( ...

    Abstract In Mild Cognitive Impairment (MCI), the study of brain metabolism, provided by 18F-FluoroDeoxyGlucose Positron Emission Tomography (
    Language English
    Publishing date 2023-12-07
    Publishing country England
    Document type Journal Article
    ZDB-ID 2835763-2
    ISSN 2405-8440
    ISSN 2405-8440
    DOI 10.1016/j.heliyon.2023.e23340
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  10. Article ; Online: A Metabolic Imaging Study of Lexical and Phonological Naming Errors in Alzheimer Disease.

    Isella, Valeria / Rosazza, Cristina / Gazzotti, Maria / Sala, Jessica / Morzenti, Sabrina / Crivellaro, Cinzia / Appollonio, Ildebrando Marco / Ferrarese, Carlo / Luzzatti, Claudio

    American journal of Alzheimer's disease and other dementias

    2021  Volume 35, Page(s) 1533317520922390

    Abstract: Patients with Alzheimer disease (AD) produce a variety of errors on confrontation naming that indicate multiple loci of impairment along the naming process in this disease. We correlated brain hypometabolism, measured with 18fluoro-deoxy-glucose positron ...

    Abstract Patients with Alzheimer disease (AD) produce a variety of errors on confrontation naming that indicate multiple loci of impairment along the naming process in this disease. We correlated brain hypometabolism, measured with 18fluoro-deoxy-glucose positron emission tomography, with semantic and formal errors, as well as nonwords deriving from phonological errors produced in a picture-naming test by 63 patients with AD. Findings suggest that neurodegeneration leads to: (1) phonemic errors, by interfering with phonological short-term memory, or with control over retrieval of phonological or prearticulatory representations, within the left supramarginal gyrus; (2) semantic errors, by disrupting general semantic or visual-semantic representations at the level of the left posterior middle and inferior occipitotemporal cortex, respectively; (3) formal errors, by damaging the lexical-phonological output interface in the left mid-anterior segment of middle and superior temporal gyri. This topography of semantic-lexical-phonological steps of naming is in substantial agreement with dual-stream neurocognitive models of word generation.
    MeSH term(s) Aged ; Alzheimer Disease/diagnostic imaging ; Alzheimer Disease/metabolism ; Alzheimer Disease/psychology ; Brain/diagnostic imaging ; Brain/metabolism ; Female ; Humans ; Male ; Semantics
    Language English
    Publishing date 2021-06-01
    Publishing country United States
    Document type Journal Article
    ZDB-ID 1283069-0
    ISSN 1938-2731 ; 0895-5336 ; 1082-5207 ; 1533-3175
    ISSN (online) 1938-2731
    ISSN 0895-5336 ; 1082-5207 ; 1533-3175
    DOI 10.1177/1533317520922390
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