perfusion CT
Simultaneous Measurement of Regional Cerebral Blood Flow by Perfusion CT and Stable Xenon CT: A Validation Study
... xenon CT results and perfusion CT data were trans- ferred to a workstation for computer processing and compari- ...son. Perfusion CT data were analyzed by both the CT perfu- sion ...
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CT Angiography and Perfusion CT in Cerebral Vasospasm after Subarachnoid Hemorrhage
... parenchymal perfusion abnormalities were probably located outside the spatial coverage of the ...3. Perfusion CT was able to detect severe vasospasm in all but one patient, showing high values of ...
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Perfusion CT Imaging of Brain Tumors: An Overview
... on perfusion imaging (Fig 3). Cor- relation of various tumor perfusion estimates with histologic angiogenesis markers could thus be very useful as far as in vivo identification of these different regions of ...
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Subtraction Perfusion CT: A Technical Note
... showed perfusion parameters were useful in the assessment of therapeutic response of liver cancer ...new CT perfusion technique, namely, the subtraction CT perfusion (SCTP), in order to ...
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Dynamic Perfusion CT: Optimizing the Temporal Resolution and Contrast Volume for Calculation of Perfusion CT Parameters in Stroke Patients
... PCT data were analyzed by using PCT prototype software (Philips Medical Systems, Best, the Netherlands). This software relies on the central volume principle, which is the most accu- rate method for low injection rates ...
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Vasospasm after Subarachnoid Hemorrhage: Utility of Perfusion CT and CT Angiography on Diagnosis and Management
... noncontrast CT (NCT) hypodensities, and TCD thresholds were evaluated for accuracy, sensitivity, and specificity, as well as for negative (NPV) and positive predictive values (PPV) in the prediction of ...
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Perfusion CT for Head and Neck Tumors: Pilot Study
... on two occasions, or between the ipsilateral and con- tralateral ICA as the input artery. Although the sta- tistical test failed to show a significant difference in these mentioned parameters, it was able to reveal ...
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Perfusion CT in Squamous Cell Carcinoma of the Upper Aerodigestive Tract: Long Term Predictive Value of Baseline Perfusion CT Measurements
... of perfusion: spatially ho- mogeneously high (Ia) or low values (Ib), necrotic areas in ⬎50% of the delineated areas (II), high values in parts of the tumor rim with lower values in the tumor core (III), and spa- ...
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Sources of Variability in the Use of Standardized Perfusion Value for HCC Studies
... The CT perfusion technique is quickly spreading in the field of oncology since it can be simply incorpo- rated into routine CT protocols, providing precious in- formation about tumour grade and ...
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Dynamic CT Perfusion Imaging of Acute Stroke
... contrast-enhanced CT scans, larger areas of impaired brain circulation were ...MR perfusion imaging used. The CBF maps are very reliable for perfusion deficits, if a good contrast bolus can be ...
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Original Article Role of Perfusion Computed Tomography in the Characterization of Lung Cancers
... slice CT scanner (Siemens Somatom Definition AS, Siemens Healthcare Sector, ...non-enhanced CT (NCCT) of thorax was performed for localization of ...Subsequently, perfusion CT was then ...
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Assessment of the Reproducibility of Postprocessing Dynamic CT Perfusion Data
... There are several significant limitations of the cur- rent study. First, all data analysis was performed by using a single commercially available software pro- gram (CT Perfusion, GE Medical Systems) that ...
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The role of CT perfusion in the characterisation of solitary renal lesions an added value to multiphasic CT
... The choice of regions of interest (ROIs) which is the key area of perfusion analysis must be selected adequately to avoid sampling errors. In the arterial input function, the artery which is used to generate the ...
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Effects of Radiation Exposure on the Cost Effectiveness of CT Angiography and Perfusion Imaging in Aneurysmal Subarachnoid Hemorrhage
... RESULTS: CT angiography and CT perfusion imaging were the dominant strategies, resulting in both better health outcomes and lower costs, even when incorporating brain cancer and cataract ...
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CT Perfusion Quantification of Small Vessel Ischemic Severity
... Although perfusion techniques in white matter disease are currently experimental, our results and those of others suggest that CBF may be a useful surrogate marker of white matter disease ...
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Quantitative PET-CT Perfusion Imaging of Prostate Cancer
... Non-linear optimization techniques are often used to fit the PET model curve to the measured PET TAC. Another potential disadvantage to compartment modeling is the lengthy computation time taken to estimate the model ...
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CT Perfusion Parameter Values in Regions of Diffusion Abnormalities
... Our mean CBF value for control brain tissue mea- sured (23.9 mL/100 g/min) is substantially lower than commonly reported values for gray matter obtained with methods such as positron emission tomography (PET) and xenon ...
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Effect of Training and Experience on Qualitative and Quantitative CT Perfusion Data
... In the quantitative assessment of global cortical perfusion, there was a low degree of variability in the CBF, CBV, and MTT values, ranging from 3.55 to 13.66% (Table 4), among the 6 observers placing 10 ROIs on ...
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Masked smoothing using separable kernels for CT perfusion images
... Twenty-three CT perfusion studies were selected from the Neurosurgery department’s stroke research database, at the University at ...nineteen CT perfusion volumes from a Toshiba Aquilion ONE, ...
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Dynamic CT Perfusion Imaging in Subarachnoid Hemorrhage–Related Vasospasm
... landmark to identify the injection site. By using an aseptic technique, a 23-gauge needle attached to a butterfly catheter was inserted through the skin inferior to the occipital protuberance. When the needle passed into ...
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