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Showing 1 to 20 of 39 for “"Perfusion Imaging"”.
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Peripheral perfusion imaging modeling
… for contrast-free ultrasonic per- fusion imaging. Novel pulsed-Doppler methods for perfusion imaging are val- idated using dialysis cartridges as perfusion phantoms. Techniques are exam- ined quantitatively at 5 and 12.5 MHz using phantoms with blood-mimicking fluid flow within cellulose …
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Ultrasound tissue perfusion imaging
Enhanced blood perfusion in a tissue mass is an indication of neo-vascularity and potential malignancy. Ultrasonic pulsed Doppler imaging is a safe and economical modality for noninvasive monitoring of blood flow. However, weak blood echoes make it difficult to detect perfusion using standard …
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Myocardial Perfusion Imaging With Rb-82 PET
Myocardial perfusion imaging (MPI) is an effective technique used to study the left ventricular ejection function (LVEF), myocardial perfusion, wall motion, and wall thickening. Positron emission tomography (PET) and single photon emission computed tomography (SPECT) are two modalities that can be …
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Power doppler ultrasound for peripheral perfusion imaging
Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2023-12-04 without embargo terms
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Electrical Impedance Tomography for Perfusion Imaging and Monitoring
… impedance tomography (EIT) is a medical imaging technology that uses boundary electrodes to inject stimulus currents and measure the resulting potential distributions. These potentials are measured using electrodes which are in turn used to reconstruct conductivity changes within the …
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An investigation into the limitations of myocardial perfusion imaging
Myocardial Perfusion Imaging (MPI) plays a very important role in the management of patients with suspected Coronary Artery Disease and its use has grown despite the shortcomings of the technique. Significant progress has been made in identifying the causes of these shortcomings and many solutions …
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Improving the Robustness of Perfusion Imaging with Arterial Spin Labeling Magnetic Resonance Imaging
Tissue function depends heavily on perfusion, a process which brings the blood supply to the tissue through the arterial system and removes the metabolic by-products via the veins. Abnormalities and disruptions in this process can have profound effects. Cerebral blood flow (CBF), a quantitative …
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Validation of first pass magnetic resonance myocardial perfusion imaging using fractional flow reserve
Background - Magnetic Resonance Myocardial Perfusion Imaging (MRMPI) has been used for the detection of reversible myocardial ischaemia in humans since the early 1990’s. This non-invasive method of diagnosing reversible myocardial ischaemia has a number of advantages over the other more commonly …
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Perfusion imaging using power doppler ultrasound without contrast enhancement to diagnose peripheral artery disease
Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2024-09-16 without embargo terms
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Perfusion imaging using power doppler ultrasound without contrast enhancement to diagnose peripheral artery disease
Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2024-09-16 without embargo terms
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Full Field Laser Perfusion Imaging and Post Occlusive Reactive Hyperaemia in the Skin Microcirculation: A Biomarker of Cardiovascular Disease Risk?
The full field laser perfusion imager (FLPI) is a new, non-invasive device which can measure dynamic changes in blood flow of the skin microcirculation. Endothelial dysfunction is the earliest detectable functional indicator of cardiovascular disease (CVD), contributing to the development of …
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Evaluation of the effect of breast implants on the accuracy of the CT attenuation Correction (CTAC) map for SPECT/CT myocardial perfusion imaging: a phantom study
Background: Myocardial perfusion imaging (MPI) using single photon emission computedtomography (SPECT) imaging can assess myocardial viability and perfusion. However,overlying thoracic structures, such as ribs or breast tissue lead to gamma ray attenuation. Thisattenuation does not occur equally …
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Methodology for quantitative assessment of perfusion in porcine model of peripheral arterial disease
… artery disease (PAD) is the degradation of perfusion in the lower muscles caused by the narrowing of upstream arteries. Currently, the diagnosis and prognosis of the disease rely almost entirely on hemodynamic metrics of major vessels affecting the periphery. Quantitative assessment of …
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Catheter based magnetic resonance compatible perfusion probe
… a thermal based technique to quantify brain perfusion. The thermal diffusion probe (TDP) technology measures perfusion in a relatively small volume of brain tissue. The neurosurgeon chooses the specific brain location and probe placement based on their clinical concern. When an early …
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Vascular Function in Women and Children Following a Pregnancy Complicated by Preeclampsia
… the accuracy and clinical applicability of laser perfusion imaging. Our studies of postpartum women reveal that those with prior severe preeclampsia display heightened microvascular endothelium-dependent and -independent vasodilation and exhibit higher carotid stiffness compared to women with mild …
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Image processing techniques in nuclear medicine
… has been investigated. <br></br><br></br>Hepatic perfusion imaging studies with <sup>99</sup>Tc<sup>m</sup>-tin colloid were performed in patients with primary colorectal carcimma. The hepatic perfusion index performed poorly in the detection of those patients with occult or overt hepatic …
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Microvascular inflammatory response in the skin
… by previous measurements of microvascular perfusion. The microvascular effects of terbutaline and the NO donor sodium nitroprusside were investigated, as were their effect on the microvascular response to histamine in guinea pig skin. Terbutaline alone showed a small microvascular response …
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Quantitative Non-Contrast Perfusion Measurements Using Arterial Spin Labeled MRI: Evaluation of Therapy Response in Brain Tumors and Technical Advancements in Kidneys
… change in size becomes evident. Quantitative imaging techniques can identify these early effects, providing a valuable window of opportunity to effectively manage cancer treatments. Notably, angiogenesis, a key biological process that promotes aberrant tumor neovascularization, is emerging as …
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Cardiovascular Magnetic Resonance Guided Revascularisation
… of a high-resolution <em>k-t</em> accelerated perfusion sequence with a standard sequence.<br/> ii. Validation of CMR quantification of absolute myocardial perfusion using the high-resolution sequence against PET.<br/> iii. Investigation of the relationship between an angiographic score (BCIS-1 …
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NEW ADVANCES IN QUANTITATIVE RADIOLOGY: RADIOMICS IN NEURORADIOLOGY APPLIED TO PRIMARY BRAIN TUMORS USING A MACHINE LEARNING APPROACH
… model, using arterial-spin labelling (ASL) perfusion imaging. Methods: Retrospective single-institution study in a cohort of 52 glioma patients. Radiomics-based models with a minimal set of relevant features and clinical parameters were built for MGMT methylation and IDH-mutation prediction …
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