Comparison of different 4D CT-Perfusion algorithms to visualize lesions after microwave ablation in an in  vivo porcine model.

Conclusion: The DIDC appears to be the most feasible model to visualize margins and necrosis zones after microwave ablation, but due to high computational demand, a single input deconvolution algorithm might be preferable in clinical practice. PMID: 31724443 [PubMed - in process]
Source: International Journal of Hyperthermia - Category: Internal Medicine Tags: Int J Hyperthermia Source Type: research

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ConclusionsDECT predicted vascular density with lower radiation exposure compared to PCT. DECT could potentially replace PCT for evaluating the vascularity of meningiomas.
Source: European Journal of Radiology - Category: Radiology Source Type: research
Conclusion: NBOMe ingestion implicates the risk of peripheral vasospasms with severe, limb-threatening ischemia.
Source: International Journal of Environmental Research and Public Health - Category: Environmental Health Authors: Tags: Brief Report Source Type: research
Advances in X-ray computed tomography (CT) over the past 20 years have enabled non-invasive imaging of the coronary arteries, as well as cardiac structure and function. Coronary computed tomography angiography (CTA) has emerged as an accurate non-invasive imaging modality for identifying the anatomic severity of coronary stenoses (1 –3). Similar to other anatomic coronary imaging, coronary CTA alone has been limited in its ability to define the hemodynamic significance of coronary stenoses (4). Since the identification of the presence and severity of ischemia are important parameters for selecting between invasive an...
Source: Journal of Cardiovascular Computed Tomography - Category: Radiology Authors: Source Type: research
Authors: Brindhaban A Abstract Rationale: Radiation dose to patients from imaging modalities are measured or calculated to assess the risk of the procedure and compared it to the benefits. Periodic review of image acquisition methods and radiation dose used are essential part of procedure optimization in medical imaging. The aim of this study was to estimate patient radiation dose from single photon emission computed tomography (SPECT) myocardial perfusion imaging (MPI) using computed tomography (CT) images for attenuation correction. Methods: SPECT and CT image acquisition parameters such as, administered activity...
Source: Journal of Nuclear Medicine Technology - Category: Nuclear Medicine Tags: J Nucl Med Technol Source Type: research
The advent of computed tomography (CT) has revolutionized radiology, and this revolution is still going on. Starting as a pure head scanner, modern CT systems are now able to perform whole-body examinations within a couple of seconds in isotropic resolution, single-rotation whole-organ perfusion, and temporal resolution to fulfill the needs of cardiac CT. Because of the increasing number of CT examinations in all age groups and overall medical-driven radiation exposure, dose reduction remains a hot topic. Although fast gantry rotation, broad detector arrays, and different dual-energy solutions were main topics in the past ...
Source: Investigative Radiology - Category: Radiology Tags: Review Articles Source Type: research
CONCLUSION: The low agreement between amyloid PET/CT and previous clinical and instrumental assessments that we found in our study suggests that the amyloid PET/CT provides additional and early information. To perform an early and differential diagnosis of AD could have a great impact on the patient's management and cost of care in order to perform the correct therapeutic interventions and to allow family members to manage adequately the patient's demanding care. PMID: 31802055 [PubMed - in process]
Source: Hellenic Journal of Nuclear Medicine - Category: Nuclear Medicine Tags: Hell J Nucl Med Source Type: research
Objectives To evaluate the utility of sequential F-18 fluorodeoxyglucose PET/diffusion-weighted imaging in assessing myocardial perfusion and viability in coronary artery disease. Methods Fourteen coronary artery disease patients and five non-coronary artery disease subjects underwent sequential cardiac F-18 fluorodeoxyglucose PET/diffusion-weighted imaging using a trimodality PET/computed tomography-MRI system. The perfusion data were acquired by measuring low b-values apparent diffusion coefficient using diffusion-weighted imaging. Regional myocardial viability was determined by perfusion/metabolism patterns. The pe...
Source: Nuclear Medicine Communications - Category: Nuclear Medicine Tags: Original Articles Source Type: research
Abstract Background: Functional assessment to rule out myocardial ischemia using coronary computed tomography angiography (CCTA) is extremely important and data on the Brazilian population are still limited. Objective: To assess the diagnostic performance of myocardial perfusion by CCTA in the detection of severe obstructive coronary artery disease (CAD) compared with single-photon emission computerized tomography (SPECT). To analyze the importance of anatomical knowledge to understand the presence of myocardial perfusion defects on SPECT imaging that is not identified on computed tomography (CT) scan. Method: A total of 3...
Source: Arquivos Brasileiros de Cardiologia - Category: Cardiology Source Type: research
Abstract Background: Functional assessment to rule out myocardial ischemia using coronary computed tomography angiography (CCTA) is extremely important and data on the Brazilian population are still limited. Objective: To assess the diagnostic performance of myocardial perfusion by CCTA in the detection of severe obstructive coronary artery disease (CAD) compared with single-photon emission computerized tomography (SPECT). To analyze the importance of anatomical knowledge to understand the presence of myocardial perfusion defects on SPECT imaging that is not identified on computed tomography (CT) scan. Method: A total of 3...
Source: Arquivos Brasileiros de Cardiologia - Category: Cardiology Source Type: research
This study is a retrospective analysis of 655 patients who underwent SPECT-MPI with CCS (2012 to 2017). Receiver operator characteristic (ROC) identified CCS cutoff value for all-cause mortality: CCS+ if> cutoff value and MPI+ if ≥ 5% total perfusion defect (TPD). Patients were divided into 1 MPI−/CCS−; 2 MPI+/CCS−; 3 MPI−/CCS+; 4 MPI+/CCS+ and compared. Cox proportional hazard analysis identified predictors of mortality.ResultsCCS cutoff for all-cause mortality was>  216 (C statistic 0.756,P 
Source: Journal of Nuclear Cardiology - Category: Nuclear Medicine Source Type: research
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