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Related Concept Videos

Imaging Studies II: Ultrasonography01:24

Imaging Studies II: Ultrasonography

IntroductionUltrasonography, or renal ultrasound, is a noninvasive medical imaging technique that uses high-frequency sound waves to visualize the kidneys, ureters, bladder, and surrounding tissues.Indications for Urinary System UltrasonographyUrinary system ultrasonography is indicated in various clinical scenarios, such as:Kidney Stones (Urolithiasis): To detect and monitor the size and presence of kidney or urinary tract stones.Hydronephrosis: To assess the dilation of the renal pelvis and...
Ultrasonography01:17

Ultrasonography

Ultrasonography is an imaging technique that uses high-frequency sound waves to visualize the body's internal structures. It is a non-invasive and safe procedure that does not involve the use of ionizing radiation, making it widely used in various medical fields. Ultrasonography is used to study heart function, blood flow in the neck or extremities, certain conditions such as gallbladder disease, and fetal growth and development.
During an ultrasonography procedure, a handheld device called a...
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 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 VII: Vascular Imaging01:19

Imaging Studies VII: Vascular Imaging

DefinitionRenal angiography, also known as renal arteriography, is an imaging technique used to obtain a comprehensive view of blood flow and the vascular structure of blood vessels in the kidneys and surrounding areas.PurposeRenal angiography detects blood vessel abnormalities in the kidneys, such as aneurysms, stenosis, thrombosis, vascular tumors, and renal artery stenosis. It evaluates kidney function and guides interventional treatments like angioplasty or stent placement.Pre-Procedure...
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...

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Related Experiment Video

Updated: May 22, 2026

An Experimental Protocol for Assessing the Performance of New Ultrasound Probes Based on CMUT Technology in Application to Brain Imaging
16:01

An Experimental Protocol for Assessing the Performance of New Ultrasound Probes Based on CMUT Technology in Application to Brain Imaging

Published on: September 24, 2017

Medical ultrasound image compression using contextual vector quantization.

Seyed Morteza Hosseini1, Ahmad-Reza Naghsh-Nilchi

  • 1Department of Computer Engineering, Faculty of Engineering, University of Isfahan, Isfahan, Iran. mhosayny@gmail.com

Computers in Biology and Medicine
|May 22, 2012
PubMed
Summary

A new contextual vector quantization (CVQ) method improves medical ultrasound (US) image compression. This technique enhances diagnostic quality while reducing image size for better storage and transmission.

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Last Updated: May 22, 2026

An Experimental Protocol for Assessing the Performance of New Ultrasound Probes Based on CMUT Technology in Application to Brain Imaging
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Area of Science:

  • Medical Imaging
  • Image Compression
  • Signal Processing

Background:

  • Increasing use of medical ultrasound (US) images presents storage and transmission challenges.
  • Maintaining high diagnostic quality during compression is crucial for medical applications.

Purpose of the Study:

  • To propose a novel context-based method, contextual vector quantization (CVQ), for efficient medical US image compression.
  • To address the limitations of existing compression methods for high-quality medical imaging.

Main Methods:

  • Defined a contextual region of interest (ROI) for high-priority, high-resolution encoding.
  • Applied a lower-resolution CVQ algorithm to the background regions.
  • Merged the encoded regions to reconstruct the final image.

Main Results:

  • Achieved very good diagnostic image quality with reduced image size.
  • Demonstrated enhanced performance parameters: improved mean square error (MSE), peak signal-to-noise ratio (PSNR), and coefficient of correlation (CoC).
  • CVQ outperformed general (JPEG, JPEG2K) and ROI-based (EBCOT, CSPIHT) methods.

Conclusions:

  • Contextual vector quantization (CVQ) is a feasible technique for overcoming medical US image storage and transmission limitations.
  • The proposed method offers superior compression efficiency and image quality compared to existing approaches.