Browsing by Subject "single photon emission computed tomography"

Anosognosia in Dementia: Evaluation of Perfusion Correlates Using 99mTc-HMPAO SPECT and Automated Brodmann Areas Analysis

Valotassiou V., Sifakis N., Tzavara C., Lykou E., Tsinia N., Kamtsadeli V., Sali D., Angelidis G., Psimadas D., Theodorou E., Tsougos I., Papageorgiou S.G., Georgoulias P., Papatriantafyllou J. (2022)

(1) Background: Considerable inconsistency exists regarding the neural substrates of anosognosia in dementia in previous neuroimaging studies. The purpose of this study was the evaluation of anosognosia perfusion correlates ...

Artificial Intelligence in Cardiology—A Narrative Review of Current Status

Koulaouzidis G., Jadczyk T., Iakovidis D.K., Koulaouzidis A., Bisnaire M., Charisopoulou D. (2022)

Artificial intelligence (AI) is an integral part of clinical decision support systems (CDSS), offering methods to approximate human reasoning and computationally infer decisions. Such methods are generally based on medical ...

Correlation of Neuropsychiatric Symptoms in Dementia with Brain Perfu-sion: A 99mTc-SPECT-HMPAO Study with Brodmann Areas Analysis

Valotassiou V., Sifakis N., Tzavara C., Lykou E., Tsinia N., Kamtsadeli V., Sali D., Angelidis G., Psimadas D., Tsougos I., Papageorgiou S.G., Georgoulias P., Papatriantafyllou J. (2021)

Background: Neuropsychiatric symptoms (NPSs) are common in dementia. Their evaluation is based on Neuropsychiatric Inventory (NPI). Neuroimaging studies have tried to elucidate the underlying neural circuits either in ...

Deep learning exploration for SPECT MPI polar map images classification in coronary artery disease

Papandrianos N.I., Apostolopoulos I.D., Feleki A., Apostolopoulos D.J., Papageorgiou E.I. (2022)

Objective: The exploration and the implementation of a deep learning method using a state-of-the-art convolutional neural network for the classification of polar maps represent myocardial perfusion for the detection of ...

Deep Learning-Based Automated Diagnosis for Coronary Artery Disease Using SPECT-MPI Images

Papandrianos N.I., Feleki A., Papageorgiou E.I., Martini C. (2022)

(1) Background: Single-photon emission computed tomography (SPECT) myocardial perfusion imaging (MPI) is a long-established estimation methodology for medical diagnosis using image classification illustrating conditions ...

Detection of extramedullary hematopoietic tissue in a patient with beta-thalassemia major on Tc99m-sestamibi parathyroid scintigraphy

Valotassiou V., Angelidis G., Alexiou S., Psimadas D., Tsougos I., Georgoulias P. (2019)

A 50-year-old man with beta-thalassemia major underwent Tc-99m sestamibi parathyroid scintigraphy due to elevated parathyroid hormone and calcium serum levels. Single-photon emission computed tomography imaging of neck and ...

Diagnosis and treatment of acute isolated proximal internal carotid artery occlusions: a narrative review

Kargiotis O., Psychogios K., Safouris A., Spiliopoulos S., Karapanayiotides T., Bakola E., Mantatzis M., Dardiotis E., Ellul J., Giannopoulos S., Magoufis G., Tsivgoulis G. (2022)

The clinical manifestations of proximal (extracranial) internal carotid artery occlusions (pICAOs) may range from asymptomatic to acute, large, and devastating ischemic strokes. The etiology and pathophysiology of the ...

Differences of apathy perfusion correlates between Alzheimer’s disease and frontotemporal dementia. A 99mTc-HMPAO SPECT study with automated Brodmann areas analysis

Valotassiou V., Sifakis N., Tzavara C., Lykou E., Tsinia N., Kamtsadeli V., Sali D., Angelidis G., Psimadas D., Tsougos I., Papageorgiou S.G., Georgoulias P., Papatriantafyllou J. (2022)

Objectives: To explore differences of apathy perfusion correlates between Alzheimer’s disease (AD) and Frontotemporal dementia (FTD) using perfusion SPECT. Methods: We studied 75 FTD and 66 AD patients. We evaluated apathy ...

Differential diagnosis of behavioral variant and semantic variant of frontotemporal dementia using visual rating scales

Manouvelou S., Koutoulidis V., Tsougos I., Tolia M., Kyrgias G., Anyfantakis G., Moulopoulos L.-A., Gouliamos A., Papageorgiou S. (2020)

Background: Frontotemporal dementia (FTD) represents the second most frequent early onset of dementia in people younger than 65 years. The main syndromes encompassed by the term FTD are behavioral variant of Frontotemporal ...

EANM procedural guidelines for PET/CT quantitative myocardial perfusion imaging

Sciagrà R., Lubberink M., Hyafil F., Saraste A., Slart R.H.J.A., Agostini D., Nappi C., Georgoulias P., Bucerius J., Rischpler C., Verberne H.J., Cardiovascular Committee of the European Association of Nuclear Medicine (EANM) (2021)

The use of cardiac PET, and in particular of quantitative myocardial perfusion PET, has been growing during the last years, because scanners are becoming widely available and because several studies have convincingly ...

Eating Disorders in Frontotemporal Dementia and Alzheimer's Disease: Evaluation of Brain Perfusion Correlates Using 99mTc-HMPAO SPECT with Brodmann Areas Analysis

Valotassiou V., Sifakis N., Tzavara C., Lykou E., Tsinia N., Kamtsadeli V., Sali D., Angelidis G., Psimadas D., Tsougos I., Papageorgiou S.G., Georgoulias P., Papatriantafyllou J. (2021)

Background: Eating disorders (ED) in dementia represent a significant impairment affecting patients' and caregivers' lives. In frontotemporal dementia (FTD), ED include overeating, sweet food preference, stereotypical ...

The greek variant in app gene: The phenotypic spectrum of app mutations

Kalampokini S., Georgouli D., Patrikiou E., Provatas A., Valotassiou V., Georgoulias P., Spanaki C., Hadjigeorgiou G.M., Xiromerisiou G. (2021)

Mutations in the gene encoding amyloid precursor protein (APP) cause autosomal dominant inherited Alzheimer’s disease (AD). We present a case of a 68-year-old female who presented with epileptic seizures, neuropsychiatric ...

Impact of renin–angiotensin–aldosterone system polymorphisms on myocardial perfusion: Correlations with myocardial single photon emission computed tomography-derived parameters

Angelidis G., Samara M., Papathanassiou M., Satra M., Valotassiou V., Tsougos I., Psimadas D., Tzavara C., Alexiou S., Koutsikos J., Demakopoulos N., Giamouzis G., Triposkiadis F., Skoularigis J., Kollia P., Georgoulias P. (2019)

Background: Renin–angiotensin–aldosterone system (RAAS) has an important role in atherosclerosis. We investigated the effects of six RAAS gene polymorphisms on myocardial perfusion. Methods and Results: We examined 810 ...

In the era of FDG PET, is it time for brain perfusion SPECT to gain a place in Alzheimer’s disease imaging biomarkers?

Valotassiou V., Angelidis G., Psimadas D., Tsougos I., Georgoulias P. (2020)

[No abstract available]

Investigating the genetic characteristics of CAD: Is there a role for myocardial perfusion imaging techniques?

Angelidis G., Valotassiou V., Satra M., Psimadas D., Koutsikos J., Skoularigis J., Kollia P., Georgoulias P. (2022)

Several environmental and genetic factors have been found to influence the development and progression of coronary artery disease (CAD). Although the effects of the environmental hazards on CAD pathophysiology are well ...

Investigation of attenuation correction in SPECT using textural features, Monte Carlo simulations, and computational anthropomorphic models

Spirou, S. V.; Papadimitroulas, P.; Liakou, P.; Georgoulias, P.; Loudos, G. (2015)

PurposeTo present and evaluate a new methodology to investigate the effect of attenuation correction (AC) in single-photon emission computed tomography (SPECT) using textural features analysis, Monte Carlo techniques, and ...

Position paper of the EACVI and EANM on artificial intelligence applications in multimodality cardiovascular imaging using SPECT/CT, PET/CT, and cardiac CT

Slart R.H.J.A., Williams M.C., Juarez-Orozco L.E., Rischpler C., Dweck M.R., Glaudemans A.W.J.M., Gimelli A., Georgoulias P., Gheysens O., Gaemperli O., Habib G., Hustinx R., Cosyns B., Verberne H.J., Hyafil F., Erba P.A., Lubberink M., Slomka P., Išgum I., Visvikis D., Kolossváry M., Saraste A. (2021)

In daily clinical practice, clinicians integrate available data to ascertain the diagnostic and prognostic probability of a disease or clinical outcome for their patients. For patients with suspected or known cardiovascular ...