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 'Liver Sonography' 
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Result : Searchterm 'Liver Sonography' found in 1 term [] and 2 definitions [], (+ 16 Boolean[] results)
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Liver SonographyMRI Resource Directory:<br> - Liver -
 
A liver sonography is a diagnostic tool to image the liver and adjoining upper abdominal organs such as the gallbladder, spleen, and pancreas. Deeper structures such as liver and pancreas are imaged at a lower frequency 1-6 MHz with lower axial and lateral resolution but greater penetration. The diagnostic capabilities in this area can be limited by gas in the bowel scattering the sound waves.
The application of microbubbles may be useful for detection of liver lesions and for lesion characterization. Some microbubbles have a liver-specific post vascular phase where they appear to be taken up by the reticuloendothelial system (RES). Dynamic contrast enhanced scans in a similar way as with CT or MRI can be used to studying the arterial, venous and tissue phase.
After a bolus injection, early vascular enhancement is seen at around 30sec in arterialized lesions (e.g., hepatocellular carcinomas (HCC), focal nodular hyperplasia (FNH)). Later enhancement is typical of hemangiomas with gradually filling towards the center. In the late phase at around 90sec, HCCs appear as defects against the liver background. Most metastases are relatively hypovascular and so do not show much enhancement and are seen as signal voids in the different phases.
Either with an intermittent imaging technique or by continuous scanning in a nondestructive, low power mode, characteristic time patterns can be used to differentiate lesions.
See also Medical Imaging, B-Mode, High Intensity Focused Ultrasound, Ultrasound Safety and Contrast Medium.
Radiology-tip.comAbdomen CT
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Radiology-tip.comLiver Imaging
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• Related Searches:
    • Gallbladder Ultrasound
    • Contrast Enhanced Ultrasound
    • Medical Imaging
    • Endoscopic Ultrasound
    • Abdominal Ultrasound

 Further Reading:
  Basics:
Optimizing Doppler and Color Flow US: Application to Hepatic Sonography(.pdf)Open this link in a new window
   by radiographics.rsna.org    
Cirrhosis, Ultrasound findingsOpen this link in a new window
   by rad.usuhs.mil    
  News & More:
Continuous Infusion Versus Bolus Injection Of Ultrasound Contrast Agents in Vascular Doppler Flow Imaging Response(.pdf)Open this link in a new window
Friday, 1 September 2000   by stroke.ahajournals.org    
Noninvasive ways to assess liver diseaseOpen this link in a new window
Friday, 1 February 2008   by www.eurekalert.org    
High-energy Ultrasound Sharpens View Of Liver TumorsOpen this link in a new window
Friday, 11 January 2008   by www.sciencedaily.com    
Searchterm 'Liver Sonography' was also found in the following service: 
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MRI  (1) Open this link in a new window
Contrast Enhanced UltrasoundInfoSheet: - Contrast Agents - 
Intro, 
Historical Development, 
Microbubbles,
etc.MRI Resource Directory:<br> - Vascular -
 
(CEUS) Contrast agents increase the reflection of ultrasonic energy, improve the signal to noise ratio and caused by that the detection of abnormal microvascular and macrovascular disorders. Contrast enhanced ultrasound is used in abdominal ultrasound (liver sonography) as well as in cerebrovascular examinations e.g., for an accurate grading of carotid stenosis. The used contrast agents are safe and well tolerated.

The quality of the enhancement depends on:
point the concentration of the contrast agent;
point the type of injection, flow rate;
point the patient characteristics;
point the microbubble quality and properties of the filling gas and the shell.
The additional use of ultrasound contrast agents (USCAs) may overcome typical limitations like poor contrast of B-mode imaging or limited sensitivity of Doppler techniques. The development of new ultrasound applications (e.g., blood flow imaging, perfusion quantification) depends also from the development of pulse sequences for bubble specific imaging. In addition, contrast enhanced ultrasound improves the monitoring of ultrasound guided interventions like RF thermal ablation.
See also Contrast Enhanced Doppler Imaging, Contrast Harmonic Imaging, Contrast Imaging Techniques and Contrast Pulse Sequencing.
Radiology-tip.comContrast Enhanced Computed Tomography
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Radiology-tip.comContrast Enhanced MRI
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• View the news results for 'Contrast Enhanced Ultrasound' (1).



 Further Reading:
  Basics:
Guidelines and Good Clinical Practice Recommendations for Contrast Enhanced Ultrasound (CEUS)Open this link in a new window
2008   by www.efsumb.org    
  News & More:
Role of ultrasound and contrast-enhanced ultrasound in patients with cerebrovascular disease(.pdf)Open this link in a new window
Friday, 1 March 2002   by eurheartjsupp.oupjournals.org    
The clinical applications of contrast echocardiography(.pdf)Open this link in a new window
2000   by cme.medscape.com     
US Resources  
Thyroid - Databases - Equipment and Parts - Gall Bladder - Resources - Software
 
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 'Liver Sonography' was also found in the following services: 
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Resources  (1)  
 
Abdominal UltrasoundMRI Resource Directory:<br> - Abdominal -
 
(AUS) Abdominal ultrasound, (TAE) transabdominal echography, abdomen sonography, sonogram, (FAST) focused assessment
Ultrasonography is an ideal clinical tool for determining the source of abdominal pain. An abdominal ultrasound includes the liver, gallbladder, biliary tree, pancreas, spleen, kidneys and blood vessels of the abdomen. Conventional ultrasound is cheap, safe, non-invasive and is a practical first line investigation. High resolution ultrasound, endoscopic ultrasound and contrast enhanced Doppler techniques assist in detecting small lesions. The best preparation is nothing to eat or drink from midnight the night before the exam (minimum 8 hours).

Indications:
point abdominal pain;
point stones in the gallbladder or kidneys;
point inflammation;
point cancer, metastasis.

FAST is a rapid diagnostic test of the trauma patient that sequentially detects the presence of free fluid in pericardium (hemopericardium) and in 4 views of the abdomen. These views, the right upper quadrant (RUQ), left upper quadrant (LUQ), the subcostal, and suprapubic views detect a hemoperitoneum in patients with potential truncal injuries. The Morison pouch between the liver and right kidney (RUQ) is a space in which intraperitoneal fluid can accumulate. Emergency abdominal ultrasonography is indicated for the evaluation of aortic aneurysm, appendicitis, and biliary and renal colic, as well as blunt or penetrating abdominal trauma.
See also Pelvic Ultrasound, Pregnancy Ultrasound, Prostate Ultrasound and Pediatric Ultrasound.
Radiology-tip.comAbdomen CT
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Radiology-tip.comAbdominal Imaging
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• View the news results for 'Abdominal Ultrasound' (1).



 Further Reading:
  Basics:
Starting Abdominal UltrasoundOpen this link in a new window
   by myweb.lsbu.ac.uk    
Bedside Limited Echocardiography by the Emergency Physician Is Accurate During Evaluation of the Critically Ill PatientOpen this link in a new window
2004   by www.ncbi.nlm.nih.gov    
Normal Anatomy of the Abdomen - UltrasoundsOpen this link in a new window
   by rad.usuhs.mil    
  News & More:
Optimizing Doppler and Color Flow US: Application to Hepatic Sonography(.pdf)Open this link in a new window
   by radiographics.rsna.org    
Renal Transplant Imaging and Intervention: Practical Aspects - 2Open this link in a new window
Tuesday, 11 August 1998   by www.radiology.co.uk    
Acute Appendicitis Diagnosed by UltrasoundOpen this link in a new window
   by rad.usuhs.mil    
Cirrhosis, Ultrasound findingsOpen this link in a new window
   by rad.usuhs.mil    
Searchterm 'Liver Sonography' was also found in the following service: 
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MRI  (1) Open this link in a new window
Color Power AngioInfoSheet: - Modes - 
Intro, 
Overview, 
Types of, 
etc.MRI Resource Directory:<br> - Modes -
 
(CPA) Color power angio is a Doppler measurement, which employs the Doppler effect to assess whether blood is moving towards or away from the probe. By calculating the frequency shift of a particular sample volume, its speed and direction can be determined and visualized. This is particularly useful in cardiovascular studies and essential in many areas such as determining reverse blood flow in the liver vasculature in portal hypertension. The CPA information is displayed as a color image superimposed on the 2D gray scale image.
See also Color Power Doppler.
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Education - Databases - Pediatric - UltraSound Technician and Technologist Jobs - Used and Refurbished UltraSound Equipment - Jobs
 
Related Searches:
 • Gallbladder Ultrasound
 • Ultrasound Imaging
 • Laparoscopic Ultrasound
 • Contrast Enhanced Ultrasound
 • Gallbladder Examination
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