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Related Concept Videos

Computed Tomography01:10

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 MRI01:14

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: CT01:28

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 Tomography01:27

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...
Imaging Studies for Cardiovascular System VI: Calcium -Scoring CT01:25

Imaging Studies for Cardiovascular System VI: Calcium -Scoring CT

Calcium-Scoring CT ScanA calcium-scoring CT scan, also known as coronary artery calcium (CAC) scan, detects calcium deposits in the coronary arteries. This test assesses the risk of coronary artery disease (CAD), which can lead to cardiovascular events such as angina, heart failure, and sudden cardiac arrest.A calcium-scoring CT scan is generally recommended for individuals at intermediate risk of CAD without symptoms. It includes:Men aged 40-75 and women aged 50-75: Especially those with a...
Radiological Investigation I: X-ray and CT01:30

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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Dual-phase Cone-beam Computed Tomography to See, Reach, and Treat Hepatocellular Carcinoma during Drug-eluting Beads Transarterial Chemo-embolization
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What is cone-beam CT and how does it work?

William C Scarfe1, Allan G Farman

  • 1Department of Surgical/Hospital Dentistry, University of Louisville School of Dentistry, 501 South Preston Street, Louisville, KY 40292, USA. wcscar01@gwise.louisville.edu

Dental Clinics of North America
|September 23, 2008
PubMed
Summary

This article explains x-ray cone-beam CT (CBCT) acquisition, detailing how geometric and software factors impact image quality and patient radiation dose. Current CBCT systems offer valuable diagnostic imaging, with future improvements focusing on speed and accuracy.

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Area of Science:

  • Medical Imaging
  • Radiology
  • Diagnostic Technology

Background:

  • Cone-beam CT (CBCT) is an advanced X-ray imaging technique.
  • Understanding CBCT principles is crucial for optimizing image acquisition and radiation dose.

Purpose of the Study:

  • To provide an overview of CBCT operational principles.
  • To analyze the impact of geometric and software parameters on image quality and patient dose.
  • To discuss the advantages, uses, and limitations of CBCT imaging.

Main Methods:

  • Review of fundamental principles of X-ray cone-beam CT acquisition.
  • Analysis of geometric and software parameter influences on image quality and radiation dose.
  • Summary of current CBCT system capabilities and applications.

Main Results:

  • CBCT systems offer useful diagnostic images across all current generations.
  • Image quality and patient radiation dose are significantly influenced by acquisition parameters.
  • Key advantages, uses, and limitations of CBCT have been identified.

Conclusions:

  • CBCT technology provides valuable diagnostic information.
  • Future advancements aim to reduce scan times, enhance multimodal imaging, improve image fidelity (especially soft tissue contrast), and implement dose-minimizing protocols.