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Related Concept Videos

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Positron Emission Tomography (PET) is a medical imaging technique that provides crucial insights into the body's physiological functions at a molecular level. It is an indispensable resource for diagnosing, staging, and monitoring various illnesses, notably cancer, neurological disorders, and cardiovascular conditions.
Fundamental Principles of PET
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Radiological Investigation III: Pulmonary Angiogram and PET Scan01:13

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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.
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Positron emission tomography (PET) is a medical imaging technique involving radiopharmaceuticals — substances that emit short-lived radiation. Although the first PET scanner was introduced in 1961, it took 15 more years before radiopharmaceuticals were combined with the technique and revolutionized its potential.
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Related Experiment Video

Updated: Jan 7, 2026

Multi-modal Pulmonary Imaging: Using Complementary Information from CT and Hyperpolarized 129Xe MRI to Evaluate Lung Structure-Function
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Localization of Persistent Air Leaks Using Technetium-99m Technegas SPECT/CT.

Korbinian Krieger1, André Heil1, Hans Gelpke2

  • 1Clinic for Radiology and Nuclear Medicine.

Clinical Nuclear Medicine
|January 2, 2026
PubMed
Summary
This summary is machine-generated.

Technetium-99m Technegas ventilation SPECT/CT (vSPECT) effectively locates persistent air leaks (PAL) after thoracic surgery. This imaging technique aids in guiding surgical intervention and conservative management for improved patient outcomes.

Keywords:
SPECT/CTpostoperative air leaktechnegasventilation

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Electromagnetic Navigation Transthoracic Nodule Localization for Minimally Invasive Thoracic Surgery
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Area of Science:

  • Nuclear Medicine
  • Thoracic Surgery
  • Diagnostic Imaging

Background:

  • Persistent air leaks (PAL) pose a challenge in thoracic surgery.
  • Accurate localization of PAL is crucial for effective management.
  • The intraoperative water submersion test (iWST) is the current standard but has limitations.

Purpose of the Study:

  • To evaluate the utility of technetium-99m Technegas ventilation SPECT/CT (vSPECT) for localizing PAL.
  • To assess the accuracy of vSPECT in identifying the site of air leaks.

Main Methods:

  • A case series of 20 patients with suspected PAL underwent vSPECT.
  • Technegas was administered using a specialized generator.
  • SPECT/CT imaging was performed, and results were correlated with intraoperative findings and clinical course.

Main Results:

  • vSPECT successfully located PAL in 10/20 cases, confirmed by iWST.
  • In 4/20 cases, vSPECT-identified PALs were treated surgically with success, despite lack of iWST confirmation.
  • In 4/20 cases, vSPECT-identified PALs were managed conservatively.
  • vSPECT correctly identified alternative causes or absence of PAL in 2/20 cases.

Conclusions:

  • Technegas vSPECT is a valuable tool for assessing patients with suspected PAL.
  • The modality demonstrates high accuracy in localizing air leaks.
  • vSPECT aids in guiding both surgical and conservative management strategies.