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Related Concept Videos

Hemorrhagic Stroke l: Introduction01:17

Hemorrhagic Stroke l: Introduction

8
A hemorrhagic stroke is an acute neurological event that occurs when a weakened cerebral blood vessel ruptures, allowing blood to accumulate within or around the brain. The sudden release of blood forms a focal hematoma that increases intracranial pressure, displaces neural tissue, and can obstruct cerebrospinal fluid pathways. These effects may be compounded by intraventricular extension of the hemorrhage, cerebral edema, or compression of adjacent structures, all of which contribute to...
8
Hemorrhagic Stroke ll: Pathophysiology01:29

Hemorrhagic Stroke ll: Pathophysiology

8
A hemorrhagic stroke develops when a cerebral blood vessel ruptures, allowing blood to escape into the surrounding brain tissue, as in intracerebral hemorrhage (ICH), or into the subarachnoid space, as in subarachnoid hemorrhage (SAH). Because the skull is a rigid compartment, the sudden presence of extravascular blood rapidly increases intracranial pressure and compresses adjacent neural structures, leading to immediate tissue injury and impaired cerebral perfusion.Mass Effect and Primary...
8
Ischemic Stroke l: Introduction01:15

Ischemic Stroke l: Introduction

21
Ischemic stroke is an acute cerebrovascular condition in which blood flow to a brain region is suddenly interrupted, leading to tissue infarction. Neurons depend on continuous oxygen and glucose supply, so even brief reductions in perfusion cause energy failure, ionic imbalance, and irreversible injury. Ischemic strokes are classified into thrombotic and embolic types based on their underlying mechanisms.Thrombotic MechanismsThrombotic stroke develops when a clot forms within a cerebral artery.
21
Ischemic Stroke ll: Pathophysiology01:15

Ischemic Stroke ll: Pathophysiology

21
An ischemic stroke occurs when a cerebral blood vessel becomes obstructed, most often by a thrombus or embolus, interrupting the delivery of oxygen and glucose to brain tissue. Because neurons rely on continuous aerobic metabolism, energy failure begins within minutes of reduced perfusion. The region receiving the least blood flow becomes the infarct core, an area of irreversible cellular death. Surrounding this core lies the penumbra, a zone of hypoperfused but still viable tissue that is...
21
Stroke: Introduction and Types01:29

Stroke: Introduction and Types

16
A stroke is an acute neurological event caused by the sudden disruption of cerebral blood flow, leading to rapid loss of neuronal function. Neurons depend on continuous oxygen and glucose supply, so even brief interruptions can cause irreversible injury within minutes. Strokes are classified into ischemic and hemorrhagic types.Ischemic StrokeIschemic strokes are most common and occur due to arterial occlusion, depriving brain tissue of oxygen and nutrients. This leads to energy failure, ionic...
16

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Pre-Chiasmatic, Single Injection of Autologous Blood to Induce Experimental Subarachnoid Hemorrhage in a Rat Model
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A CAD System for Hemorrhagic Stroke.

Wieslaw L Nowinski1, Guoyu Qian2, Daniel F Hanley3

  • 1Biomedical Imaging Laboratory, Agency for Science Technology and Research; Singapore, Singapore - wieslaw@sbic.a-star.edu.sg.

The Neuroradiology Journal
|September 9, 2014
PubMed
Summary
This summary is machine-generated.

A new computer-aided detection (CAD) system for hemorrhagic stroke accurately segments and quantifies brain hematomas. This tool aids in monitoring treatment progression and quantifying clot removal during clinical trials.

Keywords:
CADCLEARMISTIENCCThemorrhagehemorrhagic strokestroke

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Area of Science:

  • Medical Imaging
  • Neurology
  • Computer Science

Background:

  • Computer-aided detection/diagnosis (CAD) systems are crucial in clinical practice for medical image analysis.
  • A clinically accepted CAD system for stroke detection and management is currently lacking.
  • Hemorrhagic stroke presents unique challenges in diagnosis and treatment monitoring.

Purpose of the Study:

  • To introduce a novel CAD system specifically designed for hemorrhagic stroke.
  • To enable accurate segmentation, quantification, and visualization of hematomas.
  • To support treatment monitoring and efficacy assessment in clinical trials.

Main Methods:

  • Development of a CAD system with a seven-step workflow for patient scan processing.
  • Implementation of a system architecture comprising library, tools, user interface, and segmentation algorithm.
  • Utilizing tools for contour editing, 3D modeling, volume measurement, and time-series analysis.

Main Results:

  • The CAD system successfully segments, quantifies, and displays hematoma in 2D/3D.
  • It facilitates monitoring of hemorrhage progression and clot removal quantification.
  • The system was implemented in C++ and utilized in phase-III clinical trials (CLEAR, MISTIE).

Conclusions:

  • The developed stroke CAD system offers potential for research and clinical applications.
  • It provides valuable decision support for managing hemorrhagic stroke.
  • The system is particularly relevant for enhancing clinical trial efficiency and data analysis.