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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 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...

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...

Imaging Studies for Cardiovascular System V: CT

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Cardiac computed tomography (CT) scanning is an advanced cardiac imaging technique that utilizes CT technology, with or without intravenous (IV) contrast, to produce accurate cross-sectional virtual slices of specific areas of the heart, coronary circulation, and major blood vessels such as the aorta, pulmonary veins, and arteries. The computer processes these slices to generate three-dimensional images. Multidetector CT (MDCT) is a rapid form of CT scanning that captures multiple slices...

Imaging Studies I: CT and MRI

Imaging Studies I: CT and MRI

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.
Description of the Procedures
Computed Tomography (CT) scan:
Computed Tomography (CT) scans use X-ray technology to generate detailed images of bones, organs, and tissues. During the scan, the patient lies on a moving table...

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...

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Related Experiment Video

Updated: May 18, 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

[Dose reduction in abdominal computed tomography].

M Toepker¹, H Ringl

¹Abteilung für Allgemeine Radiologie und Kinderradiologie, Univ.-Klinik für Radiodiagnostik, Medizinische Universität Wien, Währinger Gürtel 18-20, A-1090, Wien, Österreich. michael.toepker@meduniwien.ac.at

|September 14, 2012

Summary

This summary is machine-generated.

Multidetector computed tomography (MDCT) use increases patient radiation dose. Optimized dose reduction is achievable with tailored, strict protocols for individual patient needs.

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Last Updated: May 18, 2026

X-ray Dose Reduction through Adaptive Exposure in Fluoroscopic Imaging

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Time-Resolved, Dynamic Computed Tomography Angiography for Characterization of Aortic Endoleaks and Treatment Guidance via 2D-3D Fusion-Imaging

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Area of Science:

Radiology and Medical Imaging
Radiation Oncology

Context:

Increasing use of multidetector computed tomography (MDCT) has led to higher patient radiation exposure.
Multiphase MDCT protocols are standard in abdominal imaging across diverse clinical indications.

Purpose:

To explore methods for reducing radiation dose in multidetector computed tomography (MDCT).
To evaluate the efficacy of novel dose reduction techniques and adapted contrast protocols.

Summary:

Novel technologies like dual-energy CT and split-bolus contrast injection protocols can reduce scan numbers and radiation exposure.
Implementing strict, clinically adapted protocols is key to optimizing radiation dose reduction in MDCT.

Impact:

Facilitates safer diagnostic imaging practices by minimizing patient radiation dose.
Provides a framework for developing evidence-based, patient-specific MDCT protocols for dose optimization.