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Related Concept Videos

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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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.
MRI
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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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.
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Related Experiment Video

Updated: Dec 31, 2025

Imaging Features of Systemic Sclerosis-Associated Interstitial Lung Disease
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[67Ga scanning in sarcoidosis].

W Schermuly, H Behrend, P H Pöhls

    Rofo : Fortschritte Auf Dem Gebiete Der Rontgenstrahlen Und Der Nuklearmedizin
    |January 1, 1975
    PubMed
    Summary

    Gallium scans (67Ga) help assess sarcoidosis activity. They detect active granulomatous inflammation, even with scarring, guiding treatment decisions alongside other tests.

    Area of Science:

    • Nuclear Medicine
    • Pulmonology
    • Radiology

    Background:

    • Sarcoidosis is an inflammatory disease characterized by granuloma formation.
    • Assessing disease activity and fibrosis extent is crucial for management.
    • Current diagnostic methods may not always differentiate active inflammation from scarring.

    Purpose of the Study:

    • To evaluate the utility of 67Gallium (67Ga) scans as an adjunct to clinical, radiological, and perfusion studies in sarcoidosis.
    • To determine if 67Ga scans can identify active granulomatous infiltration in the presence of pulmonary fibrosis.

    Main Methods:

    • Prospective study involving patients with sarcoidosis at various disease stages.
    • Utilized 67Ga scintigraphy in conjunction with serial radiography and perfusion imaging.

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  • Correlated imaging findings with clinical and functional assessments.

    • Main Results:

    • 67Ga uptake was observed in active granulomatous lesions in the hilum, mediastinum, and lungs during stages I and II.
    • Uptake diminished with the regression of lymphadenopathy and infiltrates.
    • Gallium scans identified active inflammation in lungs with established fibrotic scarring and perfusion abnormalities.
    • Persistent granulomatous lesions were detected by 67Ga scans despite radiological evidence of fibrosis.

    Conclusions:

    • 67Ga scans are valuable for detecting active granulomatous inflammation in sarcoidosis, particularly when fibrosis complicates assessment.
    • The combination of radiography, perfusion scans, and 67Ga scans provides a comprehensive understanding of sarcoidosis dynamics.
    • 67Ga imaging can guide treatment decisions by indicating persistent active disease requiring intervention.