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Radiological Investigation I: X-ray and CT

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...

X-ray Imaging

X-ray Imaging

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 X-rays, and by 1900, X-ray was widely...

Imaging Studies for Cardiovascular System III: X-Ray

Imaging Studies for Cardiovascular System III: X-Ray

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...

Imaging Studies III: Computed Tomography

Imaging Studies III: Computed Tomography

DefinitionComputed Tomography (CT) of the genitourinary (GU) tract is a non-invasive imaging modality that utilizes X-rays and computer processing to generate detailed cross-sectional images of the urinary system, encompassing the kidneys, ureters, bladder, and adjacent structures such as the adrenal glands.PurposeCT scans of the GU tract serve several diagnostic and therapeutic purposes, including:Diagnosis of Urinary Tract Diseases: Detects kidney stones, tumors, cysts, and congenital...

Computed Tomography

Computed Tomography

Tomography refers to imaging by sections. Computed tomography (CT) is a non-invasive imaging technique that uses computers to analyze several cross-sectional X-rays to reveal minute details about structures in the body.
The technique was invented in the 1970s and is based on the principle that as X-rays pass through the body, they are absorbed or reflected at different levels. In the technique, a patient lies on a motorized platform while a computerized axial tomography (CAT) scanner rotates...

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: Jun 29, 2026

X-ray Dose Reduction through Adaptive Exposure in Fluoroscopic Imaging

X-ray Dose Reduction through Adaptive Exposure in Fluoroscopic Imaging

Published on: September 11, 2011

Digital radiography: image quality and radiation dose.

J Anthony Seibert¹

¹Department of Radiology, University of California Davis, Sacramento, CA 95817, USA. jaseibert@ucdavis.edu

|October 14, 2008

Summary

Digital radiography offers benefits like lower radiation doses and enhanced imaging but poses risks of overexposure and misdiagnosis. Understanding digital systems is crucial for safe patient care and adhering to the ALARA principle.

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Irradiator Commissioning and Dosimetry for Assessment of LQ α and β Parameters, Radiation Dosing Schema, and in vivo Dose Deposition

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Last Updated: Jun 29, 2026

X-ray Dose Reduction through Adaptive Exposure in Fluoroscopic Imaging

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Dosimetry for Cell Irradiation using Orthovoltage (40-300 kV) X-Ray Facilities

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Irradiator Commissioning and Dosimetry for Assessment of LQ α and β Parameters, Radiation Dosing Schema, and in vivo Dose Deposition

Irradiator Commissioning and Dosimetry for Assessment of LQ α and β Parameters, Radiation Dosing Schema, and in vivo Dose Deposition

Published on: March 11, 2021

Area of Science:

Radiological Imaging
Medical Physics

Background:

Digital radiography (DR) systems are replacing traditional analog screen-film detectors in diagnostic imaging.
The transition is driven by accessible electronic imaging and display technologies.

Purpose of the Study:

To review the challenges and benefits of digital radiography implementation.
To emphasize the need for understanding DR to ensure patient safety and diagnostic accuracy.

Main Methods:

Review of digital radiography technology and its clinical application.
Analysis of potential risks and advantages associated with digital detectors.

Main Results:

Digital detectors offer wide latitude and variable speed, enabling dose reduction and flexible image processing.
Potential for patient overexposure and misdiagnosis due to operator unawareness and inappropriate image processing exists.

Conclusions:

Optimal implementation of digital radiography requires careful consideration of its features.
Adherence to the as low as reasonably achievable (ALARA) principle is essential for safe and effective patient care.