perfusion weighted imaging
Predictive values of diffusion-weighted imaging and perfusion-weighted imaging in evaluating the efficacy of transcatheter arterial chemoembolization for hepatocellular carcinoma
... diffusion-weighted imaging (DWI) and perfusion-weighted imaging (PWI) in evaluating the efficacy of transcatheter arterial chemoem- bolization (TACE) for patients with hepatocellular ...
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Perfusion Weighted Imaging–Derived Collateral Flow Index is a Predictor of MCA M1 Recanalization after IV Thrombolysis
... MR perfusion-weighted im- aging can provide an index of collateral flow that is predictive of the rate of recanalization of MCA-M1 occlusions in patients treated with IV ...
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Assessment of Angiographic Vascularity of Meningiomas with Dynamic Susceptibility Contrast Enhanced Perfusion Weighted Imaging and Diffusion Tensor Imaging
... or imaging variables—age and sex of patient, as well as size, CBV, fractional anisotropy, and ADC of meningiomas—were ...and imaging variables between the 2 groups were ...
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Signal Processing Tools of MRI Perfusion-weighted Imaging Data Analysis
... DSC perfusion data ac- quired from both normal volunteers and acute stroke ...tissue perfusion status, and thus yield more accurate delin- eation of acute perfusion ...
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Tissue at Risk Is Overestimated in Perfusion Weighted Imaging: MR Imaging in Acute Stroke Patients without Vessel Recanalization
... Similar perfusion values within regions of initial diffusion restriction (L0) (4, 19) or regions progressing to infarction (LG1 and LG7) were, how- ever, reported (5, 20 ...low-up imaging into a ...
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Clinical Correlates of White Matter Blood Flow Perfusion Changes in Sturge Weber Syndrome: A Dynamic MR Perfusion Weighted Imaging Study
... First, perfusion measurements may be affected to some extent by brain atrophy and cortical calcifi- cation in the affected ...accurate perfusion measurements from brain tissue) and also large vessels, so ...
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Differentiation between Oligodendroglioma Genotypes Using Dynamic Susceptibility Contrast Perfusion Weighted Imaging and Proton MR Spectroscopy
... Surgical specimens were dissociated in tissue culture medium and directly processed for interphase fluorescent in situ hybridization analysis. The probes for 1p36 (PAX7) and 19q13.4 (CTC284K17) were labeled by nick ...
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Assessment of Transient Ischemic Attack with Diffusion and Perfusion Weighted Imaging
... PW imaging permitted the detection of regions of abnormal signal intensity in seven of our patients (four with and three without concomitant DW imaging changes), indicating the presence of tissue at risk ...
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Hemodynamic and Permeability Changes in Posterior Reversible Encephalopathy Syndrome Measured by Dynamic Susceptibility Perfusion Weighted MR Imaging
... Several factors may be involved in the overall lack of significant change in K2. First, changes in perme- ability may not be detected because of a lack of sensitivity with the perfusion-weighted ...
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Perfusion Weighted MR Imaging Studies in Brain Hypervascular Diseases: Comparison of Arterial Input Function Extractions for Perfusion Measurement
... In brain arteriovenous shunts, regional vasculature may be highly affected by aliasing in high-flow arteries and shunt ar- eas. This seems to be more critical in Th locations for both CBV and CBF estimations in patients, ...
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Application of acute stroke imagingSelecting patients for revascularization therapy
... CT perfusion; DWI ⫽ diffusion-weighted imaging; ET ⫽ endovascular therapy; ICM ⫽ imaging-clinical mismatch; MCA ⫽ middle cerebral artery; MERCI ⫽ Mechanical Embolus Removal in Cerebral ...
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Evaluation and Characterisation of Brain Tumors by Perfusion Weighted MRI
... The study consisted of a total of 51 patients including both paediatric, young and adult patients with no age barrier. Out of a total of 51 patients, 8 were paediatric, young patients and rest 43 fell under the category ...
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Lhermitte Duclos Disease: Assessment with MR Imaging, Positron Emission Tomography, Single photon Emission CT, and MR Spectroscopy
... Contrast enhancement is not a typical sign of LDD (10). If contrast enhancement is present, other diagnoses, such as (capillary) hemangioblastoma, might be suggested. Hemangioblastomas common- ly have enlarged vessels, ...
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RECENT ADVANCES IN IMAGE PROCESSING TECHNIQUES USING USG AND MRI OF LIVER
... resonance imaging (MRI) is playing an increasing role in the assessment of patients with liver disease due to its high soft tissue resolution, lack of ionizing radiation and ability to provide functional ...
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Noninvasive assessment and quantification of tumour vascularisation using MRI and CT in a tumour model with modifiable angiogenesis – An animal experimental prospective cohort study
... Both tumour cell lines H1299 and A549 revealed signifi- cantly faster growth of the tumours in the co-transplanted group as compared to the non-co-transplanted group (Fig. 2). Tumours in animals with co-transplantation ...
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C Arm CT Measurement of Cerebral Blood Volume and Cerebral Blood Flow Using a Novel High Speed Acquisition and a Single Intravenous Contrast Injection
... This study has shown the feasibility of acquiring dynamic ce- rebral perfusion measurements with the use of C-arm CT on a commercially available angiography system. This technology has the potential to provide ...
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Application of Sparse Coding Super Resolution to 16 Bit DICOM Images for Improving the Image Resolution in MRI
... resonance imaging (MRI), conventional interpolation methods are commonly used to magnify images via various image processing approaches; however, these methods tend to produce ...medical imaging, previous ...
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Differentiation of Low and High Grade Gliomas Using High b Value Diffusion Imaging with a Non Gaussian Diffusion Model
... Figure 1 shows a set of axial images from a representative patient (oligodendroglioma, WHO I) in the low-grade glioma group, in- cluding T2-weighted EPI (Fig 1A), and the FROC maps (color images in Fig 1B–D). The ...
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Blood Volume of Gliomas Determined by Double Echo Dynamic Perfusion Weighted MR Imaging: A Preliminary Study
... double-echo perfusion-weight- ed MR imaging in the evaluation of the blood vol- ume of brain tumors, such as meningiomas and neu- rinomas, has been reported (15, ...echo perfusion-weighted MR ...
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Cerebral Hemodynamics in Moyamoya Disease: Correlation between Perfusion Weighted MR Imaging and Cerebral Angiography
... From September 1995 to March 2004, a total of 29 patients with Moyamoya disease were studied by both DSC-PWI and cerebral an- giography in our radiology department. Of these 29 patients, we ex- cluded 3 patients who had ...
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