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Searchterm 'transducer' was also found in the following services: 
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EchocardiographyMRI Resource Directory:<br> - Cardiac -
 
Echocardiography is the ultrasound examination of the heart. Depending on the used ultrasound system, echocardiograms can be two-dimensional slices or 3D real-time images of the heart. Based on the ultrasound principles the direction and speed of blood flow can be utilized e.g., to diagnose a leaking or stenosed valve or to identify intracardiac shunts.

Different types of echocardiography:
point transthoracic echocardiography (TTE);
point transesophageal echocardiography (TEE);
point contrast echocardiogram (CE);
point stress echocardiogram.

The transthoracic echocardiogram (images are taken through the chest wall) is a non-invasive, highly accurate and quick assessment of the overall health of the heart.
A more invasive method is to insert a specialized scope containing an echocardiography transducer (TEE probe) into the esophagus, and record images from there. The advantages are clearer images, since the transducer is closer to the heart.
Contrast echocardiogram (CE) is already a valuable tool to delineate endocardial borders, direct invasive procedures, detect intracardiac shunts, assess myocardial perfusion and viability, and quantify coronary flow reserve and blood volumes (see also hemoglobin). The mechanism of microbubble CE is based on the physical principles of rarefaction and compression, leading to volume pulsations of microbubbles, and it is this change that results in CE signal.
Stress echocardiograms are echocardiography exams used for detection of coronary artery disease.
See also Diastole, Bicycle Stress Echocardiography, Resistive Index, and M-Mode Echocardiography.
Radiology-tip.comHeart Scintigraphy
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Radiology-tip.comCardiovascular Imaging
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• View the news results for 'Echocardiography' (6).


• Related Searches:
    • M-Mode
    • Contrast Enhanced Ultrasound
    • M-Mode Echocardiography
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    • Cardiac Ultrasound

 Further Reading:
  Basics:
The First Long-Lasting Use of Echocardiography: A Result of a False AdvertisementOpen this link in a new window
2008   by imaging.onlinejacc.org    
AMERICAN SOCIETY OF ECHOCARDIOGRAPHY - RECOMMENDATIONS FOR A STANDARDIZED REPORT FOR ADULT TRANSTHORACIC ECHOCARDIOGRAPHYOpen this link in a new window
   by www.ncbi.nlm.nih.gov    
Amer ican Society of Echocardiography - Recommendations for Quantification of Doppler Echocardiography(.pdf)Open this link in a new window
   by www.asecho.org    
Principles in Doppler EchocardiographyOpen this link in a new window
   by www.echoincontext.com    
American Society of Echocardiography Recommendations for Use of Echocardiography in Clinical TrialsOpen this link in a new window
October 2004   by www.asefiles.org    
Recommendations for Evaluation of the Severity of Native Valvular Regurgitation with Two-dimensional and Doppler Echocardiography(.pdf)Open this link in a new window
July 2003   by www.asefiles.org    
ACC/AHA Guidelines for the Clinical Application of EchocardiographyOpen this link in a new window
   by circ.ahajournals.org    
  News & More:
The clinical applications of contrast echocardiography(.pdf)Open this link in a new window
2000   by cme.medscape.com     
US Resources  
Preferential Sites - PACS - Breast - History of UltraSound - Software - RIS
 
ElementMRI Resource Directory:<br> - Probes Transducers -
 
An ultrasound element is a single slab of piezoelectric crystal that is cut into a linear collection of separate pieces. The separate pieces are called elements. Each element is wired separately to the transducer and they are fired in groups that are coordinated by a microprocessor. The elements are electrically configured to control the direction and characteristics of the sound beam.
See also Subdicing.
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US Resources  
Vaginal - Societies - Movies - Obstetric - Quality Advice - Portable UltraSound
 
Endocavitary EchographyMRI Resource Directory:<br> - Endoscopic -
 
The usual applications of endocavitary echography (also called internal echography / endoscopic ultrasound (EUS)) are examinations of the pelvic organs through internally introduced probes, which give a more precise and correct image.
Transrectal ultrasound is a well established method for rectal or prostate carcinoma assessment.
A transvaginal echography uses a small transducer that is inserted directly into the vagina.
Used are high-frequency (10-12 MHz) for superficial organs, endocavitary echography, and intraoperative laparoscopic ultrasound. A sterile cover is slipped over the probe, which is then covered with lubricating ultrasound gel and placed in the cavitary (see Equipment Preparation).
See also Endoscopic Ultrasound, Prostate Ultrasound, Interventional Ultrasound, Transurethral Sonography, Vaginal Probe, Rectal Probe.
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Searchterm 'transducer' was also found in the following services: 
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Endoscopic UltrasoundMRI Resource Directory:<br> - Endoscopic -
 
(EUS) Endoscopic ultrasound uses a small probe that is inserted in the rectum either through a proctoscope or by itself. During the test biopsies of any suspicious areas are possible. The usual necessary preparation is an enema to empty the rectum. Endoscopic ultrasound provides additional information about rectal polyps, rectal cancer, perianal infection, and sphincter muscle injuries and improves the selection of patients for local excision.
Transrectal echography using a high-frequency transducer is a well established method for preoperative rectal carcinoma assessment.
Endoscopic scanning is limited by the ultrasound physics (depth and axial resolution) of the endocavitary probe. Therefore, the combination of endoscopic and transcutaneous ultrasound is most favorable.
Radiology-tip.comComputed Tomography Enterography
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Radiology-tip.comGastrointestinal Imaging
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• View the news results for 'Endoscopic Ultrasound' (2).



US Resources  
Gall Bladder - Patient Information - Pediatric - UltraSound Technician and Technologist Schools - Vascular -
 
Equipment PreparationMRI Resource Directory:<br> - Equipment and Parts -
 
The ultrasound scanner should be started to warm up for 5 minutes before scanning. Transducers should be selected depending upon the exam type, as well as the body size, weight and habitus of the patient, before starting the exam. In addition, the power settings and techniques should be checked.
An adequate amount of an acoustic couplant such as warmed scanning gel must be placed on the skin or probe. Gel couplant assures maximum transmission of the sound beam by eliminating air interfaces.
All transducers should be cleaned and available for use for each patient. Although endocavitary ultrasound probes might be considered even less critical instruments because they are routinely protected by single use disposable probe covers. For maximum safety, a high-level disinfection of the probe between each use and the use of a probe cover as an aid to keeping the probe clean, should be performed.
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 Further Reading:
  Basics:
ROYAL COLLEGE OF RADIOLOGISTS STANDARDS FOR ULTRASOUND EQUIPMENT(.pdf)Open this link in a new window
US Resources  
Intravascular - Vaginal - Prenatal - Modes - Vascular - Fetal
 
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