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Related Concept Videos

Imaging Studies I: CT and MRI01:14

Imaging Studies I: CT and MRI

Introduction: MRI and CT scans are crucial advancements in medical imaging techniques, playing a vital role in diagnosing conditions related to the gastrointestinal (GI) system. Each scan serves distinct purposes, targets specific areas, and requires unique nursing duties.
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Imaging Studies for Cardiovascular System V: CT01:28

Imaging Studies for Cardiovascular System V: CT

Cardiac computed tomography (CT) scanning is an advanced cardiac imaging technique that utilizes CT technology, with or without intravenous (IV) contrast, to produce accurate cross-sectional virtual slices of specific areas of the heart, coronary circulation, and major blood vessels such as the aorta, pulmonary veins, and arteries. The computer processes these slices to generate three-dimensional images. Multidetector CT (MDCT) is a rapid form of CT scanning that captures multiple slices...
Radiological Investigation III: Pulmonary Angiogram and PET Scan01:13

Radiological Investigation III: Pulmonary Angiogram and PET Scan

Radiological investigations are paramount in the diagnosis and management of various pulmonary diseases. Two essential investigations are the Pulmonary Angiogram and the Positron Emission Tomography (PET) Scan.
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Radiological Investigation I: X-ray and CT01:30

Radiological Investigation I: X-ray and CT

Radiological investigations, including X-rays and computed tomography (CT) scans, are critical for diagnosing and evaluating various medical conditions. These imaging techniques provide valuable insights into the body's internal structures, aiding in the detection of abnormalities, assessment of disease progression, and development of treatment strategies. This article delves into two primary radiological investigations, chest X-rays and CT scans, outlining their purpose, procedures, and the...
Radiological Investigation II: MRI and Ventilation Perfusion Scan01:30

Radiological Investigation II: MRI and Ventilation Perfusion Scan

Description
Magnetic Resonance Imaging (MRI) and Ventilation Perfusion Scans are two radiological investigations that offer detailed diagnostic images of the body, particularly lung structures.
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MRI uses magnetic fields and radiofrequency signals to distinguish between normal and abnormal tissues. This technology provides a more detailed diagnostic image than CT scans, enabling it to characterize pulmonary nodules, stage bronchogenic carcinoma, and evaluate inflammatory activity in...
Pulmonary Embolism II: Diagnostic Studies and Interprofessional Care01:29

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Diagnosing Pulmonary EmbolismDiagnosing pulmonary embolism (PE) involves clinical assessment and advanced imaging tests. The preferred diagnostic tool is the spiral (helical) CT scan or CT angiography (CTA), which uses intravenous contrast media to visualize the pulmonary vasculature and identify emboli.A ventilation-perfusion (V/Q) scan is an alternative for patients unable to receive contrast media. This scan includes both perfusion and ventilation scanning. Perfusion scanning involves...

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Beyond the Maps: A Radiologist's Guide to CT Perfusion Pearls and Pitfalls.

Hussein Alsa'di1, Kyle Werth1, Kelly Dahlstrom1

  • 1Department of Radiology, University of Kansas Medical Center, Kansas City, KS.

Seminars in Roentgenology
|June 22, 2026
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Summary
This summary is machine-generated.

Computed tomography (CT) perfusion imaging is vital for acute ischemic stroke treatment decisions. Understanding potential pitfalls in CT perfusion interpretation is crucial for accurate patient selection and effective management.

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Area of Science:

  • Neurology
  • Radiology
  • Medical Imaging

Background:

  • Computed tomography (CT) perfusion is a key imaging technique in acute ischemic stroke.
  • It helps extend treatment eligibility and allows for personalized, tissue-based decisions.
  • However, its interpretation faces challenges that can affect patient management.

Purpose of the Study:

  • To highlight the common pitfalls in CT perfusion interpretation for acute ischemic stroke.
  • To emphasize the importance of recognizing these issues for clinical decision-making.
  • To ensure appropriate patient selection for endovascular therapy.

Main Methods:

  • Review of technical, physiological, and workflow-related factors affecting CT perfusion interpretation.
  • Analysis of how these factors can lead to misinterpretations.
  • Discussion of strategies to mitigate these pitfalls.

Main Results:

  • CT perfusion interpretation is prone to various pitfalls.
  • These pitfalls can lead to incorrect assessments of ischemic tissue.
  • Awareness and proper interpretation are essential for guiding treatment.

Conclusions:

  • Recognizing CT perfusion pitfalls is critical for acute ischemic stroke management.
  • Accurate interpretation ensures appropriate patient selection for therapies like endovascular treatment.
  • Addressing these challenges improves the reliability of CT perfusion in clinical practice.