Purpose: Neuroimaging is increasingly used to support the clinical diagnosis of patients with cognitive impairment. Dopamine transporter (DAT) imaging, such as DaTSCAN SPECT, tests the integrity of the nigrostriatal pathway, whereas FDG-PET identifies typical patterns of cortical and subcortical hypometabolism. The aim of this study was to assess the relative contribution of DAT and regional glucose metabolism imaging to the differential diagnosis.
Patients And Methods: Twenty-seven subjects were investigated for neurodegenerative dementia associated with parkinsonism of variable severity by FDG-PET and DaTSCAN SPECT. They were grouped according to the clinically established diagnosis, including probable Alzheimer disease (5 subjects), corticobasal degeneration (6 subjects), Lewy body dementia (8 subjects), frontotemporal dementia (4 subjects), and Parkinson disease with dementia (4 subjects). Normalized FDG uptake and DAT uptake ratios were obtained by the BRASS software. We used a discriminant analysis with a stepwise method and a leave-one-out cross-validation.
Results: With the use of regional values of normalized FDG uptake, 85.2% and 55.6% of the patients were correctly classified by the discriminant analysis and the cross-validation, respectively. When DAT alone was considered, the results were 59.3% and 51.9%, whereas the combination of both DAT and normalized FDG uptake yielded 100% and 88.9% of accurate classifications.
Conclusions: This automated analysis approach shows that the information provided by normalized FDG uptake and DAT is not redundant for the differential diagnosis of dementia and that taking into account both normalized FDG uptake and DAT uptake allows a better classification of individual patients. These results further support the usefulness of both modalities in the clinical workup of dementia.
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http://dx.doi.org/10.1097/RLU.0b013e318279b991 | DOI Listing |
Biomedicines
January 2025
Doctoral Studies Department, Biomedical Science, 410087 Oradea, Romania.
Cervical cancer is the most important cancer type found in women throughout the world. Numerous research studies are being performed to investigate the effectiveness of different strategies for the imaging and treatment of locally advanced cervical cancer, which are showing favorable outcomes. Brachytherapy is characterized by the application of very high radiation doses to target tumor cells with the least exposure to normal tissues.
View Article and Find Full Text PDFBioorg Chem
January 2025
Department of Nuclear Medicine, The First Affiliated Hospital of Sun Yat-sen University, 58# Zhongshan Er Road, Guangzhou 510080, Guangdong Province, China. Electronic address:
Cervical lymph node (LN) metastasis is highly prevalent in thyroid cancer (TC). However, the lack of diagnostic modalities that enable real-time assessment of LN metastasis remains a challenge in providing efficient clinical decision-making and optimal patient care. Sodium-ascorbate co-transporters (SVCTs) have shown high expression levels in TC, presenting a potential target for visualizing LN metastasis.
View Article and Find Full Text PDFEur J Nucl Med Mol Imaging
January 2025
Department of Nuclear Medicine and PET, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China.
Purpose: To investigate the efficacy of [Ga]Ga-FAPI-04 PET/CT for assessing viable tumours (VTs) after local regional treatment (LRT) in hepatocellular carcinoma (HCC) patients. The related imaging features of HCC after LRT are preliminarily discussed.
Methods: A cohort of 37 LRT patients with HCC (encompassing 51 lesions) was retrospectively included from a prospective parent study (ChiCTR2000039099), and sequential PET/CT using [F]FDG and [Ga]Ga-FAPI-04 was performed.
Front Neurol
January 2025
Department of Neurosurgery, Beijing Tiantan Hospital, Capital Medical University, Beijing, China.
Objective: This study was to employ 18F-flurodeoxyglucose (FDG-PET) to evaluate the resting-state brain glucose metabolism in a sample of 46 patients diagnosed with disorders of consciousness (DoC). The aim was to identify objective quantitative metabolic indicators and predictors that could potentially indicate the level of awareness in these patients.
Methods: A cohort of 46 patients underwent Coma Recovery Scale-Revised (CRS-R) assessments in order to distinguish between the minimally conscious state (MCS) and the unresponsive wakefulness syndrome (UWS).
Eur J Nucl Med Mol Imaging
January 2025
Department of Nuclear Medicine/PET center, Huashan Hospital, Fudan University, Shanghai, 200235, China.
Purpose: Dopamine transporter [C]CFT PET is highly effective for diagnosing Parkinson's Disease (PD), whereas it is not widely available in most hospitals. To develop a deep learning framework to synthesize [C]CFT PET images from real [F]FDG PET images and leverage their cross-modal correlation to distinguish PD from normal control (NC).
Methods: We developed a deep learning framework to synthesize [C]CFT PET images from real [F]FDG PET images, and leveraged their cross-modal correlation to distinguish PD from NC.
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