Nuclear Medicine Communications

OBJECTIVES: Determine if subspecialist second opinion review alters reporting of malignancy on 18F-FDG PET/CT for patients with breast cancer. METHODS: This IRB-approved retrospective study compared 248 s opinion reads of 18F-FDG PET/CT exams performed for patients with breast cancer against the original outside institution reports. Subspecialist reviews documented if malignant findings on the outside report were believed to be malignant and noted additional malignant findings not described on the outside report...

The utilization of machine learning techniques in medicine has exponentially increased over the last decades due to innovations in computer processing, algorithm development, and access to big data. Applications of machine learning techniques to neuroimaging specifically have unveiled various hidden interactions, structures, and mechanisms related to various neurological disorders. One application of interest is the imaging of Alzheimer's disease, the most common cause of progressive dementia. The diagnoses of Alzheimer's disease, mild cognitive impairment, and preclinical Alzheimer's disease have been difficult...

OBJECTIVE: Idiopathic pulmonary fibrosis (IPF) is a fatal disease characterized by the accumulation of extracellular matrix. Because there is no effective treatment for advanced IPF to date, its early diagnosis can be critical. Vimentin is a cytoplasmic intermediate filament that is significantly up-regulated at the surface of fibrotic foci with a crucial role in fibrotic morphological changes. METHODS: In the present study, VNTANST sequence as a known vimentin-targeting peptide was conjugated to hydrazinonicotinic acid (HYNIC) and labeled with 99mTc...

No abstract text is available yet for this article.

No abstract text is available yet for this article.

PURPOSE: Hypercoagulable state is a complication of various infections, and inflammatory processes and is a common scenario in cancer patients also. Timely diagnosis and treatment are essential to reduce further complications in such patients. The present study aimed to assess the role of FDG PET/CT in the diagnosis of benign vs. malignant tumor thrombus and to determine cut-off SUVmax to differentiate them. PATIENTS AND METHODS: We retrospectively reviewed all FDG PET/CT scans of patients done in our department from January 2017 to March 2022...

No abstract text is available yet for this article.

BACKGROUND: Diabetic cardiomyopathy is defined as an independent entity with a specified pathological progression from diastolic dysfunction with preserved ejection fraction to overt heart failure. Myocardial perfusion imaging (MPI) with gated-single-photon emission computed tomography (G-SPECT) has been introduced as a feasible tool to evaluate left ventricular (LV) diastolic function. The aim of this study was to investigate the characteristics of diastolic parameters derived from G-SPECT MPI in diabetic patients compared to patients at very low risk of coronary artery disease (CAD) and with no other CAD risk factors...

PURPOSE: To evaluate whether metabolic and volumetric data from 68Ga-PSMA PET/CT performed during staging of de-novo high-volume mCSPC patients who received docetaxel could be used to predict survival. METHODS: Forty-two de-novo high-volume mCSPC patients, who received ADT + Docetaxel and underwent 68Ga-PSMA PET/CT for staging, were included in the study. The association between patients' pathological data, all PSA measurements, treatments they received, the data obtained from 68Ga-PSMA PET/CT and progression-free and overall survival were examined...

OBJECTIVE: The purpose of this work was to identify the potential mutation of epidermal growth factor receptor in nonsmall cell adenocarcinoma by noninvasive method, and to explore whether the same or better effect can be achieved using a small amount of single-mode PET image data. METHOD: A total of 115 patients were recruited and the results of their 18F-FDG PET images and gene detection after resection were obtained; 117 original radiation features and 744 wavelet transform features were extracted from PET images...

OBJECTIVE: In this study, we aimed to compare the diagnostic value of [68Ga]Ga-Pentixafor and [18F]FDG PET/CT in the evaluation of non-small cell lung cancer (NSCLC) patients. METHODS: Patients with pathology-proven NSCLC were prospectively included. Patients underwent [18F]FDG and [68Ga]Ga-Pentixafor PET/CT within 1 week. All suspicious lesions were interpreted as benign or malignant, and the corresponding PET/CT semi-quantitative parameters were recorded. A two-sided P-value <0...

OBJECTIVE: This study aimed to investigate the association between 18F-fluorodeoxyglucose (18F-FDG) PET/computed tomography (CT) and clinicopathological characteristics and sarcopenia in patients with pancreatic cancer and to determine their prognostic roles. METHODS: Clinicopathological factors and 18F-FDG PET/CT metabolic parameters of maximum standard uptake value, metabolic tumor volume, and total lesion glycolysis of the primary tumor (SUVmax_P, MTV_P, and TLG_P) and of whole-body lesions (MTV_T and TLG_T) were retrospectively reviewed in 113 pretreatment patients with pancreatic cancer...

OBJECTIVE: In the management of ST-segment elevation myocardial infarction (STEMI), if the treatment has not been initiated within the first 24 h and the patient no longer exhibits any symptoms, the decision to begin revascularization therapy is based on myocardial viability. If the tissue is nonviable, current guidelines advise against further revascularization therapy; however, collateral vessels represent an alternative source of blood supply and may help the damaged tissue to resume function; though at first, this tissue may not be considered viable...

INTRODUCTION: Brain metastases may manifest as hypermetabolism or hypometabolism compared with normal brain activity on 18fluorine-fluorodeoxyglucose PET (18F-FDG PET). We aim to undertake a systematic review and meta-analysis to determine the diagnostic accuracy of FDG PET for detecting brain metastases from different extracranial primary cancers. METHODS: PubMed and EMBASE were searched systematically. Study selection and quality assessment were performed independently by two authors...

OBJECTIVE: To investigate the value of 18F-fluorodeoxyglucose(FDG) PET/CT multi-time points imaging (MTPI) on the differential diagnosis between lung cancer (LC) and tuberculosis (TB). METHODS: Sixty-four patients underwent 18F-FDG PET/CT MTPI. The stdSUVmax, stdSUVavg, retention index, metabolic tumor volume, total lesion glycolysis at four-time points and slope of metabolic curve were measured and calculated, and the sex, age, and uniformity of FDG uptake were recorded...

BACKGROUND: Although it causes low-dose radiation exposure, dimercaptosuccinic acid (DMSA) renal cortical scintigraphy is the gold standard examination method in the noninvasive diagnosis of renal scar tissue (RST). Shear wave elastography (SWE) has recently come to the fore as a technique for measuring kidney stiffness in the examination of RST. The present study aims to compare DMSA and SWE tests to evaluate whether SWE can be used instead of DMSA as a test that does not cause radiation exposure in pediatric patients...

INTRODUCTION: A DnCNN for image denoising trained with natural images is available in MATLAB. For Tc-99m DMSA images, any loss of clinical details during the denoising process will have serious consequences since denoised image is to be used for diagnosis. The objective of the study was to find whether this pre-trained DnCNN can be used for denoising Tc-99m DMSA images and compare its performance with block matching 3D (BM3D) filter. MATERIALS AND METHODS: Two hundred forty-two Tc-99m DMSA images were denoised using BM3D filter (at sigma = 5, 10, 15, 20, and 25) and DnCNN...

Thyroid nodules are frequently detected incidentally on 18F-fluorodeoxyglucose PET-computed tomography (18F-FDG PET-CT) studies and may prompt, further, often invasive investigation for malignancy. Published malignancy rates in thyroid nodules incidentally detected on 18F-FDG PET-CT range from 15 to 80%. The vast majority of these nodules are clinically nonsignificant, well differentiated microcarcinomas with no impact on morbidity or mortality. This is a very important consideration in patients with established non-thyroidal malignancies...

No abstract text is available yet for this article.

OBJECTIVE: The objective was to evaluate the impacts of different reconstruction methods [filtered back projection (FBP) and ordered subset expectation maximization (OSEM)] and different filters (Butterworth filter and Gaussian filter) on the image quality in cadmium-zinc-telluride (CZT)-based single photon emission computed tomography (SPECT)/computed tomography (CT) pulmonary perfusion imaging. METHODS: A combinations including FBP with Butterworth filter, OSEM with Butterworth filter (OSEM + Butterworth filter ), and OSEM with Gaussian filter (OSEM + Gaussian filter) were used during SPECT image reconstruction...