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Caveats to Acute Imaging for Acute Stroke in the Setting of Venoarterial Extracorporeal Membrane Oxygenation
Venoarterial extracorporeal membrane oxygenation (VA-ECMO) is increasingly used for cardiorespiratory support in medically refractory cases. The high rate of neurologic complications, specifically cerebrovascular disorders such as acute ischemic stroke, in VA-ECMO patients frequently prompts the acquisition of neuroimaging studies such as CT with angiography and perfusion imaging. Clinicians must be familiar with the ECMO-related artifacts when interpreting such studies. Here, we describe a case of asymmetric contrast opacification in a VA-ECMO patient with axillary artery cannulation.
Source: Neurology Clinical Practice - December 13, 2021 Category: Neurology Authors: Viamonte, M. A., Yu, J., Echevarria, F. D., Nagae, L., Youn, T. S., Tahsili-Fahadan, P., Simpkins, A. N. Tags: Stroke in young adults, CT, All Cerebrovascular disease/Stroke Case Source Type: research

Baxter to Acquire 1 of the 16 Most Promising Private Companies in Medtech
Baxter Healthcare is set to acquire Cheetah Medical, a firm an analyst identified earlier this year as one of 16 disruptive private companies in medtech. The transaction consists of an upfront cash consideration of $190 million, with potential for an additional $40 million based on clinical and commercial milestones. It is set to close in 4Q19. Boston and Tel Aviv, Israel-based Cheetah Medical is a major provider of non-invasive hemodynamic monitoring technologies. The addition of Cheetah Medical is expected to enhance Deerfield, IL-based Baxter’s presence in the specialized patient monitoring space with ...
Source: MDDI - September 11, 2019 Category: Medical Devices Authors: Omar Ford Tags: IV Products Business Source Type: news

A “one-stop-shop” 4D CTA protocol using 320-row CT for advanced imaging in acute ischemic stroke: a technical note
AbstractThis technical note describes a novel CT scan protocol that includes a non-enhanced CT, dynamic CTA, and perfusion of the whole brain and CTA of the carotid arteries using a 320-row area detector CT scanner, with a unique contrast injection and acceptable radiation exposure dose in patients presenting with acute ischemic stroke. The acquisition parameters and reconstruction parameters will be discussed including the use of model-based iterative reconstruction (MBIR), time summing (tMIP), and subtraction techniques to optimize the results of this protocol.Key Points• Scanning on a 320-row area detector CT can achi...
Source: European Radiology - August 5, 2019 Category: Radiology Source Type: research

IschemaView launches Rapid Angio neuroimaging system
Medical imaging dev IschemaView said yesterday that it launched its Rapid Angio neuroimaging system designed for use in the angiography suite. The Menlo Park, Calif.-based company said that it partnered with Siemens (NYSE:SI) to integrate the Rapid software with Siemens’ SyngoDynaCT multiphase system for the newly launched imaging solution. Siemens’ SyngoDyna CT Multiphase is a 3D image acquisition technique which uses multiple rotations of a C-arm system to acquire multi-phasic 3D representation of the brain and its perfusion. “The Rapid Angio module, by combining the best-in-class syngoDynaCT system...
Source: Mass Device - March 1, 2019 Category: Medical Devices Authors: Fink Densford Tags: Business/Financial News Imaging Neurological ischemaview Source Type: news

CT perfusion in acute stroke calls: A pictorial review and differential diagnoses
Summary CT perfusion is increasingly utilised in hyperacute stroke to facilitate diagnosis and patient selection for reperfusion therapies. This review article demonstrates eight examples of how CT perfusion can be used to diagnose stroke mimics and small volume infarcts, which can be easily missed on non‐contrast CT, and to suggest the presence of an ischaemic penumbra. Radiologists involved in stroke management must understand the importance of rapid imaging acquisition and be confident in the prospective interpretation of this powerful diagnostic tool as we move into a new era of hyperacute stroke care.
Source: Australasian Radiology - December 2, 2015 Category: Radiology Authors: Albert H Chiu, Timothy J Phillips, Constantine C Phatouros, Tejinder P Singh, Graeme J Hankey, David J Blacker, William McAuliffe Tags: Medical Imaging—Review Article Source Type: research

Dynamic Iterative Reconstruction for Interventional 4-D C-Arm CT Perfusion Imaging
We present a dynamic, iterative reconstruction (DIR) approach to reconstruct TACs described by a weighted sum of basis functions. To reduce noise, a regularization technique based on joint bilateral filtering (JBF) is introduced. We evaluated the algorithm with a digital dynamic brain phantom and with data from six canine stroke models. With our dynamic approach, we achieve an average Pearson correlation (PC) of the PCCT canine blood flow maps to co-registered perfusion CT maps of 0.73. This PC is just as high as the PC achieved in a recent PCCT study, which required repeated injections and acquisitions.
Source: IEE Transactions on Medical Imaging - June 28, 2013 Category: Biomedical Engineering Source Type: research