Search research articles

ABOUT JoVE

Overview Leadership Blog JoVE Help Center

AUTHORS

Publishing Process Editorial Board Scope & Policies Peer Review FAQ Submit

LIBRARIANS

Testimonials Subscriptions Access Resources Library Advisory Board FAQ

RESEARCH

JoVE Journal Methods Collections JoVE Encyclopedia of Experiments Archive

EDUCATION

JoVE Core JoVE Business JoVE Science Education JoVE Lab Manual Faculty Resource Center Faculty Site

Terms & Conditions of Use

Related Concept Videos

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

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...

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 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 II: Positron Emission Tomography and Scintigraphy

Imaging Studies II: Positron Emission Tomography and Scintigraphy

Positron Emission Tomography (PET) is a medical imaging technique that provides crucial insights into the body's physiological functions at a molecular level. It is an indispensable resource for diagnosing, staging, and monitoring various illnesses, notably cancer, neurological disorders, and cardiovascular conditions.
Fundamental Principles of PET

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...

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by

Same author

Executive functions and associated brain volumetry in children with persistent stunting and catch-up growth.

Scientific reports·2025

Same author

Childhood brain morphometry in children with persistent stunting and catch-up growth.

PloS one·2025

Same author

Morphometric analysis of Corpus Callosum in autistic and typically developing Indian children.

Psychiatry research. Neuroimaging·2022

Same author

Estimation of Anatomical Dimensions of the Thorax from Computed Tomography Images of the Adult and Pediatric Indian Population for Developing Optimal Radiological Protocols.

Journal of medical physics·2022

Same author

Is there a role for upper gastrointestinal contrast study to predict the outcomes of sleeve gastrectomy? Lessons learnt from a prospective study.

Journal of minimal access surgery·2022

Same author

Salivaomics for Oral Cancer Detection: An Insight.

Journal of pharmacy & bioallied sciences·2021

Search research articles

Related Experiment Video

Updated: Jun 11, 2026

Voluntary Breath-hold Technique for Reducing Heart Dose in Left Breast Radiotherapy

Voluntary Breath-hold Technique for Reducing Heart Dose in Left Breast Radiotherapy

Published on: July 3, 2014

Radiation doses during chest examinations using dose modulation techniques in multislice CT scanner.

Roshan S Livingstone¹, Joe Pradip, Paul M Dinakran

¹Department of Radiology, Christian Medical College, Vellore - 632 004, TN, India.

The Indian Journal of Radiology & Imaging

|July 8, 2010

Summary

Dose modulation techniques in CT scans significantly reduce radiation exposure. Z-axis modulation achieved up to 42% dose reduction while maintaining diagnostic image quality compared to manual protocols.

Keywords:

Dose modulation MSCT radiation dose

More Related Videos

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

A Whole Body Dosimetry Protocol for Peptide-Receptor Radionuclide Therapy (PRRT): 2D Planar Image and Hybrid 2D+3D SPECT/CT Image Methods

A Whole Body Dosimetry Protocol for Peptide-Receptor Radionuclide Therapy (PRRT): 2D Planar Image and Hybrid 2D+3D SPECT/CT Image Methods

Published on: April 24, 2020

Related Experiment Videos

Last Updated: Jun 11, 2026

Voluntary Breath-hold Technique for Reducing Heart Dose in Left Breast Radiotherapy

Voluntary Breath-hold Technique for Reducing Heart Dose in Left Breast Radiotherapy

Published on: July 3, 2014

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

A Whole Body Dosimetry Protocol for Peptide-Receptor Radionuclide Therapy (PRRT): 2D Planar Image and Hybrid 2D+3D SPECT/CT Image Methods

A Whole Body Dosimetry Protocol for Peptide-Receptor Radionuclide Therapy (PRRT): 2D Planar Image and Hybrid 2D+3D SPECT/CT Image Methods

Published on: April 24, 2020

Area of Science:

Radiology
Medical Imaging
Radiation Dose Optimization

Background:

Radiation dose and image quality are critical parameters in computed tomography (CT) imaging.
Optimizing CT protocols is essential for patient safety and diagnostic accuracy.

Purpose of the Study:

To compare radiation dose and image quality between a manual CT protocol and dose modulation techniques (angular and z-axis) on a 6-slice scanner.
Evaluate the effectiveness of dose modulation in reducing radiation exposure during contrast-enhanced chest CT.

Main Methods:

Study included 221 patients undergoing contrast-enhanced chest CT.
Manual protocol used fixed 140 kV and 120 mAs.
Dose modulation techniques (angular and z-axis) used fixed 140 kV with automatic mAs selection.
Effective dose calculated from dose-length product (DLP); image quality assessed by signal-to-noise (SNR) ratio.

Main Results:

Manual protocol effective doses ranged from 8.54 to 9.07 mSv.
Z-axis dose modulation effective doses ranged from 4.95 to 10.24 mSv.
SNR at the liver region was highest with z-axis modulation (8.8 H) compared to manual (5.1 H) and angular (6.2 H).

Conclusions:

Angular dose modulation reduced dose by up to 15%.
Z-axis dose modulation reduced dose by up to 42%.
Both modulation techniques provided acceptable diagnostic image quality compared to the manual protocol.