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 'Obstetric and Gynecologic Ultrasound' 
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Result : Searchterm 'Obstetric and Gynecologic Ultrasound' found in 1 term [] and 5 definitions [], (+ 13 Boolean[] results)
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Searchterm 'Obstetric and Gynecologic Ultrasound' was also found in the following services: 
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Obstetric and Gynecologic UltrasoundMRI Resource Directory:<br> - Obstetric -
 
Obstetric and gynecologic [gynaecologic, Brit.] ultrasound is an essential tool to evaluate the fetus, uterus, ovaries and surrounding tissues. Pelvic ultrasound is performed routinely during pregnancy, examinations to determine the cause of infertility, pelvic pain or abnormal vaginal bleeding.
Women with uncomplicated pregnancies may be referred to ultrasound between the 16th and 20th week of pregnancy for routine assessment of gestational age, fetal size and growth with a real-time scanner. Many defects of the fetal anatomy can be identified using ultrasound examination during the mid-trimester of pregnancy.
For gynecological sonography, a transabdominal sonogram is performed with a full bladder. If the pelvic ultrasound shows any pathology, or does not provide a clear image of the organs, a transvaginal ultrasound is performed to better visualize the uterus and ovaries. In general, ultrasound can detect inflammation, free fluid, cysts, and tumors in the pelvic region.
See also Pregnancy Ultrasound, Pelvic Ultrasound, Hysterosalpingo Contrast Sonography and Vaginal Probe.
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• View the news results for 'Obstetric and Gynecologic Ultrasound' (1).


• Related Searches:
    • Fetal Ultrasound
    • Hysterosalpingo Contrast Sonography
    • Sonography
    • Magnetic Resonance Guided Focused Ultrasound
    • Interventional Ultrasound

 Further Reading:
  Basics:
Pelvic ultrasoundOpen this link in a new window
   by www.surgeryencyclopedia.com    
EDUCATIONAL TUTORIALS: ULTRASOUND - IMAGING Open this link in a new window
   by www.obgyn.net    
US Resources  
Image Libraries - Abdominal - Jobs - Safety - History of UltraSound - RIS
 
History of UltrasoundMRI Resource Directory:<br> - History of UltraSound -
 
point In 1880 the Curie brothers discovered the piezoelectric effect in quartz. Converse piezoelectricity was mathematically deduced from fundamental thermodynamic principles by Lippmann in 1881.
point In 1917, Paul Langevin (France) and his coworkers developed an underwater sonar system (called hydrophone) that uses the piezoelectric effect to detect submarines through echo location.
point In 1935, the first RADAR system was produced by the British physicist Robert Watson-Wat. Also about 1935, developments began with the objective to use ultrasonic power therapeutically, utilizing its heating and disruptive effects on living tissues. In 1936, Siemens markets the first ultrasonic therapeutic machine, the Sonostat.
point Shortly after the World War II, researchers began to explore medical diagnostic capabilities of ultrasound. Karl Theo Dussik (Austria) attempted to locate the cerebral ventricles by measuring the transmission of ultrasound beam through the skull. Other researchers try to use ultrasound to detect gallstones, breast masses, and tumors. These first investigations were performed with A-mode.
point Shortly after the World War II, researchers in Europe, the United States and Japan began to explore medical diagnostic capabilities of ultrasound. Karl Theo Dussik (Austria) attempted to locate the cerebral ventricles by measuring the transmission of ultrasound beam through the skull. Other researchers, e.g. George Ludwig (United States) tried to use ultrasound to detect gallstones, breast masses, and tumors. This first experimentally investigations were performed with A-mode. Ultrasound pioneers contributed innovations and important discoveries, for example the velocity of sound transmission in animal soft tissues with a mean value of 1540 m/sec (still in use today), and determined values of the optimal scanning frequency of the ultrasound transducer.
point In the early 50`s the first B-mode images were obtained. Images were static, without gray-scale information in simple black and white and compound technique. Carl Hellmuth Hertz and Inge Edler (Sweden) made in 1953 the first scan of heart activity. Ian Donald and Colleagues (Scotland) were specialized on obstetric and gynecologic ultrasound research. By continuous development it was possible to study pregnancy and diagnose possible complications.
point After about 1960 two-dimensional compound procedures were developed. The applications in obstetric and gynecologic ultrasound boomed worldwide from the mid 60’s with both, A-scan and B-scan equipment. In the late 60’s B-mode ultrasonography replaced A-mode in wide parts.
point In the 70’s gray scale imaging became available and with progress of computer technique ultrasonic imaging gets better and faster.
point After continuous work, in the 80’s fast realtime B-mode gray-scale imaging was developed. Electronic focusing and duplex flow measurements became popular. A wider range of applications were possible.
point In the 90’s, high resolution scanners with digital beamforming, high transducer frequencies, multi-channel focus and broad-band transducer technology became state of the art. Optimized tissue contrast and improved diagnostic accuracy lead to an important role in breast imaging and cancer detection. Color Doppler and Duplex became available and sensitivity for low flow was continuously improved.
point Actually, machines with advanced ultrasound system performance are equipped with realtime compound imaging, tissue harmonic imaging, contrast harmonic imaging, vascular assessment, matrix array transducers, pulse inversion imaging, 3D and 4D ultrasound with panoramic view.
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Radiology-tip.comDiagnostic Imaging
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 Further Reading:
  News & More:
Physics Tutorial: Ultrasound PhysicsOpen this link in a new window
   by www.physics247.com    
A-Mode Area RatioOpen this link in a new window
   by www.wildultrasound.com    
US Resources  
Carotid - Examinations - Liver - Online Books - Vaginal - General
 
Interventional UltrasoundMRI Resource Directory:<br> - Ultrasound Therapy -
 
Interventional ultrasound or ultrasonography uses invasive or surgical procedures. Its widest application is intravascular ultrasound imaging, for example used to measure atherosclerotic plaque. But it is useful also in urology for prostate treatment with high intensity focused ultrasound and intraabdominal conditions like endoscopic ultrasound.
Ultrasound guided interventions, like RF thermal ablation or biopsies are used e.g., in liver sonography, obstetric and gynecologic ultrasound, or thyroid ultrasound procedures.
See also Transurethral Sonography, Endocavitary Echography, and B-Mode Acquisition and Targeting.
Radiology-tip.comInterventional Radiology
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Radiology-tip.comMR Guided Interventions
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 Further Reading:
  Basics:
Metastatic bladder carcinoma to liver biopsy, proven with ultrasound guidanceOpen this link in a new window
   by rad.usuhs.mil    
Path from ultrasound guided biopsy on 18 Dec 03 pendingOpen this link in a new window
   by rad.usuhs.mil    
  News & More:
Biplane Color Flow Duplex Intravenous Intravascular Ultrasound for Arterial VisualizationOpen this link in a new window
2004   by enth.allenpress.com    
Path from ultrasound guided biopsy on 18 Dec 03 pendingOpen this link in a new window
   by rad.usuhs.mil    
Searchterm 'Obstetric and Gynecologic Ultrasound' was also found in the following services: 
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Pelvic UltrasoundMRI Resource Directory:<br> - Pelvic -
 
A pelvic ultrasound is commonly used during pregnancy to check on the prenatal development of the fetus. Gynecologic ultrasonography is a tool to image the female pelvic organs, like uterus, ovaries, Fallopian tubes, bladder, pouch of Douglas, and pelvic pathology of relevance outside of pregnancy. Male pelvic ultrasound checks the health of the bladder and prostate.
Pelvic ultrasound can be performed externally through the abdominal wall, transvaginal or transrectal. A full bladder is advantageous in obstetric and gynecologic ultrasound, because sound waves passes very well through liquid; the bladder is used as an acoustic window to see deeper structures and to push the bowel out the way, allowing for better imaging. If the bladder can not be made full enough, or if the gas within the bowel makes imaging difficult, transvaginal sonography is the most effective way of imaging the pelvis.
See also Fetal Ultrasound, Transvaginal Sonography, Vaginal Probe, Urologic Ultrasound, Reflux Sonography and Transrectal Sonography.
Radiology-tip.comAbdomen CT
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Radiology-tip.comAbdominal Imaging
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• View the news results for 'Pelvic Ultrasound' (1).



 Further Reading:
  Basics:
Female pelvis - ultrasound anatomyOpen this link in a new window
   by rad.usuhs.mil    
Medical Physics: Ultrasound - extended reading exerciseOpen this link in a new window
   by www.cyberphysics.pwp.blueyonder.co.uk    
General Pelvis Anatomy, UltrasoundOpen this link in a new window
   by rad.usuhs.mil    
Three-Dimensional Ultrasound in Gynecology: Where is it Applicable?Open this link in a new window
   by www.gehealthcare.com    
  News & More:
Acute Appendicitis Diagnosed by UltrasoundOpen this link in a new window
   by rad.usuhs.mil    
Ultrasound appearances of pelvic inflammatory disease. Patient A: Hydrosalpinx. Patient B: Pyosalpinx. Patient C: Tubo-ovarian abscess.Open this link in a new window
   by rad.usuhs.mil    
US Resources  
Portable UltraSound - Calculation - - Preferential Sites - Gall Bladder - Equipment and Parts
 
Side EffectMRI Resource Directory:<br> - Safety -
 
Diagnostic ultrasound imaging has no known risks or long-term side effects. Discomfort to the patient is very rare if the sonogram is accurately performed by using appropriate frequencies and intensity ranges. However, the application of the ALARA principle is always recommended.
There are reports of low birth weight of babies after applying more than the recommended ultrasound examinations during pregnancy. Women who think they might be pregnant should raise this issue with the doctor before undergoing an abdominal ultrasound, to avoid any harm to the fetus in the early stages of development.
Since ultrasound is energy, sensitive tissues like the reproductive organs could possibly sustain damage if vibrated to a high degree by too intense ultrasound waves. In diagnostic ultrasonic procedures, such damage would only result from improper use of the equipment.

Possible ultrasound bioeffects:
list_point Ultrasonic heating of tissues can be created by absorption of the ultrasound energy.
list_point Due to increasing of temperature, dissolved gases from microbubbles come out of the contrast solution.
The thermal effect is controlled by the displayed thermal index and the mechanical index indicates the risk of cavitation.
An ultrasound gel is applied to obtain better contact between the transducer and the skin. This has the consistency of thick mineral oil and is not associated with skin irritation or allergy.
Specific conditions for which ultrasound may be selected as a treatment may be attached with higher risks.
See also Ultrasound Imaging Procedures, Fetal Ultrasound and Obstetric and Gynecologic Ultrasound.
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 Further Reading:
  Basics:
International guidelines and regulations for the safe use of diagnostic ultrasound in medicine(.pdf)Open this link in a new window
   by www.radiologymalaysia.org    
  News & More:
Ultrasound: Weighing the Propaganda Against the FactsOpen this link in a new window
   by www.midwiferytoday.com    
Ultrasound Produces Less Unwanted EffectsOpen this link in a new window
2004   by www.annieappleseedproject.org    
US Resources  
Research Labs - Service and Repair - Pelvic - Devices Machines Scanners Systems - Kidney - Used and Refurbished UltraSound Equipment
 
Related Searches:
 • Hysterosalpingo Contrast Sonography
 • Vaginal Probe
 • Fetal Ultrasound
 • Magnetic Resonance Guided Focused Ultrasound
 • Pelvic Ultrasound
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