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Acoustic Radiation Force Impulse-Imaging in Comparison to Transient Elastography for Liver Fibrosis Staging in HCV

2014-08-27 03:14:05 | BioPortfolio

Summary

This study will evaluate the effectiveness of Acoustic Radiation Force Impulse (ARFI)- Imaging compared to Transient Elastography (FibroScan) in differentiating liver fibrosis in patients with chronic hepatitis C. Patients who are scheduled to have a liver biopsy will also undergo ARFI and FibroScan testing. The liver biopsy will be used as the reference method. The target sample size is 433.

Study Design

Primary Purpose: Diagnostic

Conditions

Chronic Hepatitis C

Intervention

FibroScan, Acoustic Radiation Force Impulse (ARFI)- Imaging

Location

Bordeaux University Hospital
Bordeaux
France

Status

Recruiting

Source

Johann Wolfgang Goethe University Hospitals

Results (where available)

View Results

Links

Published on BioPortfolio: 2014-08-27T03:14:05-0400

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Medical and Biotech [MESH] Definitions

Non-invasive imaging methods based on the mechanical response of an object to a vibrational or impulsive force. It is used for determining the viscoelastic properties of tissue, and thereby differentiating soft from hard inclusions in tissue such as microcalcifications, and some cancer lesions. Most techniques use ultrasound to create the images - eliciting the response with an ultrasonic radiation force and/or recording displacements of the tissue by Doppler ultrasonography.

The use of molecularly targeted imaging probes to localize and/or monitor biochemical and cellular processes via various imaging modalities that include RADIONUCLIDE IMAGING; ULTRASONOGRAPHY; MAGNETIC RESONANCE IMAGING; fluorescence imaging; and MICROSCOPY.

The use of pre-treatment imaging modalities to position the patient, delineate the target, and align the beam of radiation to achieve optimal accuracy and reduce radiation damage to surrounding non-target tissues.

A condition caused by dysfunctions related to the SINOATRIAL NODE including impulse generation (CARDIAC SINUS ARREST) and impulse conduction (SINOATRIAL EXIT BLOCK). It is characterized by persistent BRADYCARDIA, chronic ATRIAL FIBRILLATION, and failure to resume sinus rhythm following CARDIOVERSION. This syndrome can be congenital or acquired, particularly after surgical correction for heart defects.

Timing the acquisition of imaging data to specific points in the breathing cycle to minimize image blurring and other motion artifacts. The images are used diagnostically and also interventionally to coordinate radiation treatment beam on/off cycles to protect healthy tissues when they move into the beam field during different times in the breathing cycle.

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