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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...
Radiological Investigation III: Pulmonary Angiogram and PET Scan01:13

Radiological Investigation III: Pulmonary Angiogram and PET Scan

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

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 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 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...

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Related Experiment Video

Updated: May 17, 2026

X-ray Dose Reduction through Adaptive Exposure in Fluoroscopic Imaging
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X-ray Dose Reduction through Adaptive Exposure in Fluoroscopic Imaging

Published on: September 11, 2011

Radiological protection in paediatric computed tomography.

P-L Khong1, D Frush, H Ringertz

  • 1Department of Diagnostic Radiology, Queen Mary Hospital, The University of Hong Kong, Hong Kong. plkhong@hku.hk

Annals of the ICRP
|October 24, 2012
PubMed
Summary
This summary is machine-generated.

Pediatric patients face higher cancer risks from radiation due to longer life expectancy and sensitive developing tissues. Implementing radiation protection strategies and optimizing computed tomography (CT) scan parameters are crucial for minimizing cumulative radiation dose in children.

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Whole-body PET/MRI of Pediatric Patients: The Details That Matter

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X-ray Dose Reduction through Adaptive Exposure in Fluoroscopic Imaging
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Whole-body PET/MRI of Pediatric Patients: The Details That Matter
10:02

Whole-body PET/MRI of Pediatric Patients: The Details That Matter

Published on: December 19, 2017

Area of Science:

  • Medical Imaging
  • Radiology
  • Pediatric Oncology

Background:

  • Pediatric patients are more susceptible to radiation-induced cancer than adults.
  • Cumulative radiation doses from multiple computed tomography (CT) scans can increase cancer risk.
  • Developing organs and tissues in children are highly sensitive to radiation effects.

Purpose of the Study:

  • To outline radiation protection strategies for pediatric CT examinations.
  • To emphasize dose reduction techniques and technologies in pediatric radiology.
  • To highlight the importance of optimizing CT protocols for young patients.

Main Methods:

  • Rigorous justification of CT examinations.
  • Utilizing non-ionizing imaging techniques where feasible.
  • Optimizing radiation dose according to the 'as low as reasonably achievable' (ALARA) principle.
  • Adjusting scan parameters (mAs, kVp, pitch) based on patient factors and study indication.
  • Employing advanced dose reduction technologies like tube current modulation and iterative reconstruction.
  • Restricting multiphase scans and overlapping regions, focusing only on the area of interest.
  • Optimizing image quality through post-processing.

Main Results:

  • Successful implementation of radiation protection strategies can significantly reduce cumulative radiation doses in pediatric CT.
  • Dose reduction is achievable through careful adjustment of scan parameters and utilization of modern CT technology.
  • Optimized imaging protocols ensure diagnostic quality while minimizing radiation exposure.

Conclusions:

  • A multi-faceted approach involving justification, optimization, and advanced technology is essential for effective radiation protection in pediatric CT.
  • Continuous education, advocacy, and further research are vital for advancing pediatric radiological protection.
  • Minimizing radiation dose in pediatric CT examinations is critical to reduce long-term cancer risks.