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Related Concept Videos

Pulmonary Embolism II: Diagnostic Studies and Interprofessional Care01:29

Pulmonary Embolism II: Diagnostic Studies and Interprofessional Care

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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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Pulmonary Embolism I: Introduction01:29

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Pulmonary embolism (PE) occurs when a thrombus, fat or air embolus, amniotic fluid, or tumor tissue blocks one or more pulmonary arteries. These blockages originate in the venous system or the right side of the heart.EtiologyPE primarily arises from deep vein thrombosis (DVT) and other hypercoagulable states, such as inherited thrombophilias. Additional etiological factors include venous stasis, commonly seen in obesity, and endothelial injury from surgery and trauma. Less common causes include...
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Pulmonary Embolism I: Introduction01:19

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A blood clot, or thrombus, is a semi-solid mass composed of fibrin, platelets, and red blood cells. When it forms within a vessel, it can obstruct blood flow, known as thrombosis. If part of the clot detaches, it becomes an embolus that can travel and block distant vessels. When this occurs in the pulmonary arteries, it causes a condition known as pulmonary embolism (PE).Origin and ImpactMost often, the embolus originates from a thrombus in the deep veins of the lower limbs, a condition called...
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Radiological Investigation III: Pulmonary Angiogram and PET Scan01:13

Radiological Investigation III: Pulmonary Angiogram and PET Scan

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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.
Pulmonary Angiogram
A Pulmonary Angiogram is an invasive procedure involving injecting a contrast medium through a catheter threaded into the pulmonary artery or the right side of the heart to visualize the pulmonary vasculature. Computed Tomography (CT) scans have mainly replaced this...
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Pulmonary Embolism III: Nursing Management01:27

Pulmonary Embolism III: Nursing Management

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A pulmonary embolism occurs when a thrombus, amniotic fluid, tumor tissue, fat, or air embolus blocks one or more pulmonary arteries. Effective nursing management and patient education are crucial for improving outcomes and preventing recurrence.Nursing management starts with obtaining a comprehensive patient history, particularly noting any history of deep vein thrombosis (DVT). Assess for clinical manifestations, including dyspnea, chest pain, crackles, heart murmurs, and signs of right-sided...
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Radiological Investigation II: MRI and Ventilation Perfusion Scan01:30

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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...
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A Porcine Model of Acute Autologous Pulmonary Embolism
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SPECT/CT and pulmonary embolism.

Jann Mortensen1, Henrik Gutte

  • 1Department of Clinical Physiology, Nuclear Medicine & PET, Rigshospitalet, Copenhagen University Hospital, 2100, Copenhagen, Denmark, jann.mortensen@regionh.dk.

European Journal of Nuclear Medicine and Molecular Imaging
|November 12, 2013
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Summary
This summary is machine-generated.

Diagnosing acute pulmonary embolism (PE) has advanced with single photon emission CT (SPECT) and CT pulmonary angiography (CTPA). SPECT/CT hybrid imaging offers superior diagnostic accuracy for PE detection.

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Area of Science:

  • Radiology
  • Nuclear Medicine
  • Medical Imaging

Background:

  • Acute pulmonary embolism (PE) diagnosis relies on ventilation/perfusion (V/P) scintigraphy or CT pulmonary angiography (CTPA).
  • Advancements in imaging techniques have improved diagnostic capabilities.
  • Single photon emission CT (SPECT) offers higher diagnostic value and fewer indeterminate results than planar scintigraphy.

Purpose of the Study:

  • To review and compare advanced imaging modalities for diagnosing acute pulmonary embolism (PE).
  • To discuss the diagnostic accuracy and potential of SPECT/CT, CTPA, and dual-energy CT in PE detection.

Main Methods:

  • Review of recent advancements in V/P scintigraphy (SPECT) and CTPA.
  • Comparison of diagnostic accuracy of SPECT/CT, CTPA, and planar scintigraphy.
  • Discussion of emerging techniques like dual-energy CT for PE diagnosis.

Main Results:

  • SPECT/CT demonstrated the highest diagnostic accuracy for PE compared to CTPA and planar scintigraphy alone.
  • Multidetector CT technology enables faster imaging and visualization of smaller subsegmental emboli.
  • Dual-energy CT shows promise for combined functional and anatomical imaging in PE diagnosis.

Conclusions:

  • SPECT/CT represents a significant advancement in diagnosing acute pulmonary embolism.
  • Ongoing technological developments in CTPA and dual-energy CT continue to enhance PE detection capabilities.
  • Further consensus is needed on the clinical impact and optimal treatment strategies based on these advanced imaging findings.