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Related Concept Videos

Radiological Investigation I: X-ray and CT01:30

Radiological Investigation I: X-ray and CT

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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...
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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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Imaging Studies for Cardiovascular System III: X-Ray01:20

Imaging Studies for Cardiovascular System III: X-Ray

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The most common cardiovascular diagnostic test is an X-ray. It produces images of the heart, blood vessels, and adjacent structures.
Definition and Purpose
An X-ray, or radiograph, is a non-invasive method that uses ionizing radiation to take images of internal structures. It is mainly used in cardiac imaging to examine the heart, lungs, and major blood vessels, aiming to identify abnormalities in the heart's size, shape, and position, such as heart failure, congenital defects, and vascular...
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X-ray Imaging01:24

X-ray Imaging

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German physicist Wilhelm Röntgen (1845–1923) was experimenting with electrical current when he discovered that a mysterious and invisible "ray" would pass through his flesh but leave an outline of his bones on a screen coated with a metal compound. In 1895, Röntgen made the first durable record of the internal parts of a living human: an "X-ray" image (as it came to be called) of his wife’s hand. Scientists worldwide quickly began their own experiments with...
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Radiological Investigation II: MRI and Ventilation Perfusion Scan01:30

Radiological Investigation II: MRI and Ventilation Perfusion Scan

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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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Imaging Studies I: CT and MRI01:14

Imaging Studies I: CT and MRI

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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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Computed Tomography (CT) scan:
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Related Experiment Video

Updated: Apr 15, 2026

An Automated Microscopic Scoring Method for the γ-H2AX Foci Assay in Human Peripheral Blood Lymphocytes
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[Diagnostic imaging and radiation hazards].

Michel Claudon, Luc Guillaume

    La Revue Du Praticien
    |April 7, 2015
    PubMed
    Summary

    Medical radiation exposure has increased significantly, posing risks, especially for children. Reducing radiation dose through technical advancements and alternative imaging is crucial for patient safety.

    Area of Science:

    • Medical Imaging
    • Radiological Protection

    Context:

    • Population exposure to medical radiation has risen 600% in 20 years.
    • Increased use of CT and interventional radiology drives this rise.
    • Children are particularly vulnerable to radiation-induced hazards due to sensitive tissues.

    Purpose:

    • To highlight the growing concern of medical radiation exposure.
    • To discuss strategies for reducing patient radiation dose in diagnostic imaging.
    • To emphasize the importance of risk-benefit assessment in radiological procedures.

    Summary:

    • Medical radiation exposure has increased by 600% over two decades, primarily due to advanced imaging techniques like CT.
    • Strategies to mitigate risks include technical improvements (e.g., low-dose CT, pediatric spine techniques) and non-ionizing alternatives (ultrasound, MRI).

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  • National guidelines on dose reference levels are published periodically, and collaboration between clinicians and radiologists is vital for managing radiation risk.

    • Impact:

    • Promotes awareness of radiation risks associated with diagnostic imaging.
    • Encourages the adoption of dose reduction strategies in pediatric and adult radiology.
    • Stresses the need for informed decision-making regarding the use of X-rays in medical examinations.