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Role of Intraoperative Ultrasound in Gastrointestinal (GI) Malignancies

2014-07-23 21:08:46 | BioPortfolio

Summary

Currently available investigating modalities like CT scans, MRI etc although have a high accuracy in staging of gastrointestinal(GI) tract malignancies, are not correct in all cases . The aim of this study is to assess the role of intraoperative ultrasound as a modality to increase the staging accuracy of GI tract malignancies

Study Design

Observational Model: Cohort, Time Perspective: Prospective

Conditions

Ultrasonography

Location

AIIMS
New Delhi
Delhi
India
010029

Status

Recruiting

Source

All India Institute of Medical Sciences, New Delhi

Results (where available)

View Results

Links

Published on BioPortfolio: 2014-07-23T21:08:46-0400

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Medical and Biotech [MESH] Definitions

Ultrasonography applying the Doppler effect, with the superposition of flow information as colors on a gray scale in a real-time image. This type of ultrasonography is well-suited to identifying the location of high-velocity flow (such as in a stenosis) or of mapping the extent of flow in a certain region.

Ultrasonography applying the Doppler effect, with velocity detection combined with range discrimination. Short bursts of ultrasound are transmitted at regular intervals and the echoes are demodulated as they return.

Ultrasonography applying the Doppler effect combined with real-time imaging. The real-time image is created by rapid movement of the ultrasound beam. A powerful advantage of this technique is the ability to estimate the velocity of flow from the Doppler shift frequency.

Ultrasonography applying the Doppler effect, with frequency-shifted ultrasound reflections produced by moving targets (usually red blood cells) in the bloodstream along the ultrasound axis in direct proportion to the velocity of movement of the targets, to determine both direction and velocity of blood flow. (Stedman, 25th ed)

Ultrasonography of internal organs using an ultrasound transducer sometimes mounted on a fiberoptic endoscope. In endosonography the transducer converts electronic signals into acoustic pulses or continuous waves and acts also as a receiver to detect reflected pulses from within the organ. An audiovisual-electronic interface converts the detected or processed echo signals, which pass through the electronics of the instrument, into a form that the technologist can evaluate. The procedure should not be confused with ENDOSCOPY which employs a special instrument called an endoscope. The "endo-" of endosonography refers to the examination of tissue within hollow organs, with reference to the usual ultrasonography procedure which is performed externally or transcutaneously.

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