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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 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...

Imaging Studies for Cardiovascular System V: CT

Imaging Studies for Cardiovascular System V: CT

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 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...

Brain Imaging

Brain Imaging

Brain imaging technologies provide critical insights into both the structure and function of the human brain, enabling medical professionals and researchers to diagnose, study, and treat neurological disorders or psychiatric disorders more effectively.
These technologies include computerized axial tomography (CAT or CT scans), positron-emission tomography (PET scans), magnetic resonance imaging (MRI), functional magnetic resonance imaging (fMRI), and Transcranial Magnetic Stimulation (TMS).

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...

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Principles of CT: multislice CT.

Journal of nuclear medicine technology·2008

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Updated: Jul 11, 2026

Proton Therapy Delivery and Its Clinical Application in Select Solid Tumor Malignancies

Proton Therapy Delivery and Its Clinical Application in Select Solid Tumor Malignancies

Published on: February 6, 2019

Principles of CT and CT technology.

Lee W Goldman¹

¹Department of Radiation Therapy and Medical Physics, Hartford Hospital, 80 Seymour Street, Hartford, CT 06102, USA. lgoldma@harthosp.org

Journal of Nuclear Medicine Technology

|September 8, 2007

Summary

This summary is machine-generated.

This review covers the fundamental principles of computed tomography (CT) and its historical development. Modern CT systems represent advancements driven by engineering challenges and clinical needs.

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Area of Science:

Medical Imaging
Radiology
Physics

Background:

Computed Tomography (CT) has evolved significantly from its inception.
Technological advancements address engineering problems and clinical demands.
This article reviews the foundational principles of CT.

Purpose of the Study:

To provide a comprehensive review of the basic principles of CT.
To contextualize these principles within the historical evolution of CT technology.
To set the stage for subsequent articles detailing multislice CT, image quality, and radiation dose.

Main Methods:

Historical review of CT development.
Analysis of engineering and clinical factors influencing CT evolution.
Foundational principles of CT imaging.

Main Results:

Modern CT technology is a result of continuous innovation.
CT evolution is shaped by both technical challenges and medical requirements.
Key principles of CT are established through its developmental trajectory.

Conclusions:

Understanding CT's basic principles is crucial for appreciating its evolution.
CT advancements are intrinsically linked to solving engineering and clinical problems.
This review serves as an introduction to a series on advanced CT topics.