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Rule-based natural language processing for automation of stroke data extraction: a validation study
ConclusionsRule-based NLP has a moderate to good performance for stroke-related data extraction from free-text imaging reports. The algorithm ’s accuracy was affected by inconsistent report styles and lexicon among reporting radiologists.
Source: Neuroradiology - November 9, 2022 Category: Radiology Source Type: research

CT perfusion in hyper-acute ischemic stroke: the acid test for COVID-19 fear
ConclusionThe results of CTP analysis provided a better insight in the higher prevalence of major severity stroke patients during the COVID-19 period.
Source: Neuroradiology - February 2, 2021 Category: Radiology Source Type: research

Prediction of long-term recurrent ischemic stroke: the added value of non-contrast CT, CT perfusion, and CT angiography
ConclusionData from CT imaging significantly improved the discriminatory performance and reclassification in predicting ischemic stroke recurrence beyond a model incorporating clinical risk factors only.
Source: Neuroradiology - March 17, 2021 Category: Radiology Source Type: research

CT angiography and CT perfusion improve prediction of infarct volume in patients with anterior circulation stroke
Conclusion In the acute stage, CTA and CTP have additional value over patient characteristics and non-contrast CT for predicting infarct presence and infarct volume on follow-up imaging. These findings could be applied for patient selection in future trials on ischemic stroke treatment.
Source: Neuroradiology - January 14, 2016 Category: Radiology Source Type: research

Mapping of cerebral metabolic rate of oxygen using dynamic susceptibility contrast and blood oxygen level dependent MR imaging in acute ischemic stroke
Conclusion MR-derived CMRO2 was decreased within diffusion-restricted tissue and stable within perfusion-impaired tissue, suggesting that this technique may be adequate to reveal different pathophysiological stages in acute stroke.
Source: Neuroradiology - September 12, 2015 Category: Radiology Source Type: research

Radiation exposure of computed tomography imaging for the assessment of acute stroke
ConclusionPerforming complementary CT techniques such as CTA and CTP for the assessment of acute stroke increases total radiation exposure. Hence, the revised DRLs for the complete protocol are required, where our local DRLs may help as benchmarks.
Source: Neuroradiology - September 7, 2020 Category: Radiology Source Type: research

Quantification of pial collateral pressure in acute large vessel occlusion stroke: basic concept with patient outcomes
ConclusionQPCP measurements related best with the pretreatment CTA Maas collateral grading scale but were more strongly associated with patient outcomes than any of the four widely accepted collateral grading scales. Greater QPCP was significantly associated with better overall patient outcomes as defined by mRS at 30 days.
Source: Neuroradiology - January 28, 2021 Category: Radiology Source Type: research

Collateral and permeability imaging derived from dynamic contrast material-enhanced MR angiography in prediction of PH 2 hemorrhagic transformation after acute ischemic stroke: a pilot study
ConclusionIndividual-based prediction of PH 2 hemorrhagic transformation in patients with acute ischemic stroke may be possible with multiphase collateral map and permeability imaging derived from dynamic contrast material-enhanced magnetic resonance angiography.
Source: Neuroradiology - February 3, 2021 Category: Radiology Source Type: research

Relation between reperfusion and hemorrhagic transformation in acute ischemic stroke
Conclusion Our results suggest that the increased risk of HT after acute ischemic stroke treatment is not dependent on the reperfusion status.
Source: Neuroradiology - September 4, 2015 Category: Radiology Source Type: research

Comparison of multimodal CT scan protocols used for decision-making on mechanical thrombectomy in acute ischemic stroke
ConclusionAdding CTP and/or a delayed-phase CTA to NCCT with arterial-phase CTA improves the decision-maker ’s confidence level and creates a trend towards a lower threshold for mechanical thrombectomy.
Source: Neuroradiology - January 3, 2020 Category: Radiology Source Type: research

Eligibility for intravenous thrombolysis in acute ischemic stroke patients presenting in the 4.5 –9 h window
ConclusionOur everyday clinical practice experience suggests 9.8  % of consecutive AIS patients present in the 4.5–9 h window and 2.2 % adhere to EXTEND neuroimaging eligibility criteria for IVT. Only 1.3% of AIS is eligible for IVT according to EXTEND neuroimaging and clinical eligibility criteria.
Source: Neuroradiology - January 31, 2020 Category: Radiology Source Type: research

Thrombectomy for acute ischemic stroke patients with isolated distal internal carotid artery occlusion: a retrospective observational study
ConclusionIn our population, data suggest improved outcomes after EVT in carotid-I occlusion patients and provide no arguments to withhold EVT in these patients.
Source: Neuroradiology - October 6, 2020 Category: Radiology Source Type: research

Role of diabetes in collateral status assessed in CT perfusion –derived dynamic CTA in anterior circulation stroke
ConclusionThere was no statistically significant difference among patients with good, intermediate, and poor collaterals regarding the presence of diabetes or HbA1c level on admission. However, stroke patients with poor collaterals tend to have higher blood glucose and HbA1c levels.
Source: Neuroradiology - December 9, 2021 Category: Radiology Source Type: research

Mechanical thrombectomy for acute posterior cerebral artery stroke; Feasibility and predictors of outcome
ConclusionAcute stroke from IPCAO may be successfully treated with EVT. Tmax> 6 s involvement of the midbrain-thalamus on perfusion imaging may be a predictor for clinical outcome.
Source: Neuroradiology - February 8, 2022 Category: Radiology Source Type: research

Low dose CT perfusion in acute ischemic stroke
Conclusion CTP-derived CBF and CBV are not different at 50 mAs compared to 100 mAs, even without the addition of ASIR. Current CTP protocols can be modified to reduce the effective dose by 50 % without altering CTP measurements.
Source: Neuroradiology - September 25, 2014 Category: Radiology Source Type: research

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