To compare results of selected performance measures in mammographic screening for an artificial intelligence (AI) system versus independent double reading by radiologists.In this retrospective study, we analyzed data from 949 screen-detected breast cancers, 305 interval and 13,646 negative examinations performed BreastScreen Norway during the period 2010 to 2018. An AI scored 1 10, based on risk malignancy. Results were compared after reading. score 10 was set as threshold. The stratified...

Background Ductal carcinoma in situ of the breast (DCIS) represents a challenge mammographic screening due to its unknown progression into invasive cancer. The majority DCIS is detected signs calcifications on mammograms. Purpose To analyze combinations morphology and distribution by Van Nuys nuclear grade (grade). Material Methods A total 217 diagnosed women aged 50–69 years old who participated Norwegian Breast Cancer Screening Program period November 1995 December 2007 were reviewed four...

The NOR-SASS (Norwegian Sonothrombolysis in Acute Stroke Study) aimed to assess effect and safety of contrast-enhanced ultrasound treatment an unselected acute ischemic stroke population.Patients treated with intravenous thrombolysis within 4.5 hours after symptom onset were randomized 1:1 either sonothrombolysis (CEST) or sham CEST. A visible arterial occlusion on baseline computed tomography angiography was not a prerequisite for inclusion. Pulse-wave 2 MHz given 1 hour contrast (SonoVue)...

Up to 25% of stroke patients wake up with a neurological deficit, so called wake-up (WUS). Different imaging approaches that may aid in the selection likely benefit from reperfusion therapy are currently under investigation. The magnetic resonance (MRI) diffusion weighted - fluid attenuated inversion recovery (DWI-FLAIR) mismatch concept is one proposed method for identifying presenting within 4.5 hours ischemic event.To report our experience DWI-FLAIR be thrombolysed at centre.Patients...

Abstract Segmentation of the breast region in dynamic contrast-enhanced magnetic resonance imaging (DCE-MRI) is essential for automatic measurement density and quantitative analysis findings. This study aims to compare various deep learning methods enhance whole segmentation reduce computational costs as well environmental effect future research. We collected fifty-nine DCE-MRI scans from Stavanger University Hospital and, after preprocessing, analyzed fifty-eight scans. The preprocessing...

During the coronavirus disease 2019 (COVID-19) pandemic, infectious control is of utmost importance in acute stroke treatment. This a new situation for most teams that often leads to uncertainty among physicians, nurses, and technicians who are immediate contact with patients. The made even more complicated by numerous regulations protocols released rapid succession. Herein, we describing our experience simulation training COVID-19 treatment protocols. One week allowed us identify latent...

Extent of resection (EOR) is associated with survival in glioblastoma. A standardized classification for EOR was lacking until a system recently proposed by the response assessment neuro-oncology (RANO) resect group. We aimed to assess an unselected glioblastoma cohort and use this evaluate impact on real-world setting.We retrospectively identified all patients histologically confirmed Western Norway between 1.1.2007 31.12.2014. Volumetric analyses were performed using semi-automated method....

Computed tomography (CT) scan is a fast and widely used modality for early assessment in patients with symptoms of cerebral ischemic stroke. CT perfusion (CTP) often added to the protocol by radiologists assessing severity Standard parametric maps are calculated from CTP datasets. Based on value combinations, regions separated into presumed infarct core (irreversibly damaged tissue) penumbra (tissue-at-risk). Different thresholding approaches have been suggested segment these areas. The...

Intraductal papillomas often present as small, smooth masses, dilated ducts or microcalcifications at mammography and smooth, hypoechoic masses sonography. At magnetic resonance imaging (MRI), intraductal small however, with strong enhancement type 2 3 time intensity curves. The result of the MR analysis is therefore not infrequently inconclusive in order to characterize mass benign malignant.To appearance breast MRI, determine whether application diagnostic rules described literature could...

Butterfly glioblastoma is a rare subgroup of with bihemispheric tumor crossing the corpus callosum, and associated dismal prognosis. Prognostic factors are previously sparsely described optimal treatment remains uncertain. We aimed to analyze clinical characteristics, strategies, outcomes from butterfly in real-world setting.This retrospective population-based cohort study included patients diagnosed Western Norway between 01/01/2007 31/12/2014. enrolled histologically confirmed diagnosis...

<b><i>Objectives:</i></b> Endovascular treatment (EVT) has emerged as the gold standard therapy for stroke due to large vessel occlusion (LVO). There is however limited evidence suggest that similar efficacy can be expected in elderly patients. We aimed assess and safety of EVT patients (aged > 80), comparing outcomes younger < 80). <b><i>Material Methods:</i></b> A total 195 with LVO treated were included dichotomized by age....

Metric based virtual reality simulation training may enhance the capability of interventional neuroradiologists (INR) to perform endovascular thrombectomy. As pilot for a national study we examined feasibility and utility simulated thrombectomy procedures on (VR) simulator.Six INR four residents participated in skill VR simulator (Mentice VIST 5G). Two different case-scenarios were defined as benchmark-cases, performed before after training. performing clinically also asked fill out...

Precise ischemic lesion segmentation plays an essential role in improving diagnosis and treatment planning for stroke, one of the prevalent diseases with highest mortality rate. While numerous deep neural network approaches have recently been proposed to tackle this problem, these methods require large amounts annotated regions during training, which can be impractical medical domain where data is scarce. As a remedy, we present prototypical few-shot approach using only sample training. The...

Background and purpose The direct bridging concept in acute stroke treatment combines intravenous thrombolysis ( IVT ) endovascular EVT ). frequency extent of reperfusion obtained already due to were evaluated. Additionally undesired events the clinical outcome analysed. Methods Fifty‐seven patients treated with analysed for this study. response was evaluated according modified Thrombolysis Cerebral Infarction scale (m‐ TICI responders ≥2B digital subtraction angiography) compared...

Background. Metabolic syndromes such as Wernicke's encephalopathy may present with a sudden neurological deficit, thus mimicking acute onset stroke. Due to current emphasis on rapid admission and treatment of stroke patients, there is significant risk that these mimics end up being treated thrombolysis. Rigorous clinical radiological skills are necessary correctly identify metabolic mimics, in order avoid doing any harm patients due the unnecessary use Patient. A 51-year-old Caucasian male...

Several previous studies suggest that clinical high risk for psychosis (CHR) is associated with prefrontal functional abnormalities and more widespread reduced grey matter in prefrontal, temporal parietal areas. We investigated neural correlates to CHR medication-naïve patients. 41 patients 37 healthy controls were examined 1.5 Tesla MRI, yielding scans while performing an N-back task structural T1-weighted brain images. Functional data underwent automated preprocessing steps SPM Freesurfer,...

Time is a fundamental factor during stroke treat-ments. A fast, automatic approach that segmentsthe ischemic regions helps treatment decisions. In clinical use today, set of color-coded parametric maps generated from computed tomography per-fusion (CTP) images are investigated manually to decide plan. We propose an method based on neural network using segment the two (core and penumbra) in patients affected by acute stroke. Our model convolution-deconvolution bottleneck structure with...

Our purpose was to evaluate the safety and efficacy of endovascular treatment (EVT) stroke caused by large vessel occlusions (LVO) performed general interventional radiologists in cooperation with neurologists neuroradiologists at a center limited annual number procedures. We aimed compare our results those previously reported from larger centers.