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 'Focus' 
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FocusMRI Resource Directory:<br> - UltraSound Physics -
 
In contrast enhanced ultrasound, the focus is the point at which maximum bubble destruction occur.
The transmit focus is the region on the axis of an ultrasound beam where the width of the beam has a minimum value. All waves crossing the focus are in phase in relation to the transducer surface or to the electronic summing point of an electronically focused array.
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• View the news results for 'Focus' (39).


• Related Searches:
    • Dynamic Focusing
    • Acoustic Lens
    • Beamforming
    • Focal Zone
    • Depth

 Further Reading:
  Basics:
Basic ultrasound for cliniciansOpen this link in a new window
March 2006   by folk.ntnu.no    
  News & More:
Ultrasonic Testing Using Phased ArraysOpen this link in a new window
   by www.ndt.net    
Searchterm 'Focus' was also found in the following service: 
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Radiology  (13) Open this link in a new windowMRI  (48) Open this link in a new window
Dynamic FocusingMRI Resource Directory:<br> - Probes Transducers -
 
Dynamic focusing controls the axial position of the focus of an ultrasound beam. Dynamic focusing is often managed by controlling the phase of the signals detected by a transducer array.
See also Real-Time Transducer.
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 Further Reading:
  News & More:
Ultrasonic Testing Using Phased ArraysOpen this link in a new window
   by www.ndt.net    
US Resources  
Ultrasound Guided Interventions - Vascular - UltraSound Technician and Technologist Schools - Pediatric - Resources - Pelvic
 
High Intensity Focused UltrasoundMRI Resource Directory:<br> - Ultrasound Therapy -
 
(HIFU / FUS) High intensity focused ultrasound is used in thermotherapy or thermoablation e.g., for the treatment of benign prostate hyperplasia or under study for the treatment of cancer.
An applied ultrasound probe (see transrectal sonography) focuses sound waves at one spot, elevating the tissue temperature to a point that the tissue destroys. Generally, lower frequencies (from 250 kHz to 2000 kHz) are used than for medical diagnostic ultrasound, but significantly higher time-averaged intensities.
See also Magnetic Resonance Guided Focused Ultrasound, Low Intensity Pulsed Ultrasound, and Lithotripsy.
Radiology-tip.comCT Guided Biopsy
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Radiology-tip.comMR Guided Interventions
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• View the news results for 'High Intensity Focused Ultrasound' (25).



 Further Reading:
  Basics:
MR-GUIDED HIGH-FOCUSED ULTRASOUND TREATMENT OF UTERINE FIBROIDS- REDUCTION IN FIBROID SIZE AND CLINICAL IMPROVEMENT(.pdf)Open this link in a new window
   by cds.ismrm.org    
Sound-field modification with acoustic lenses for high-intensity focused ultrasound therapyOpen this link in a new window
   by www.ncbi.nlm.nih.gov    
  News & More:
In Situ Ablation Of Breast Tumors. What Is The State Of The Art?Open this link in a new window
2002   by www.cancernews.com    
Ultrasound Produces Less Unwanted EffectsOpen this link in a new window
2004   by www.annieappleseedproject.org    
Searchterm 'Focus' was also found in the following services: 
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Magnetic Resonance Guided Focused UltrasoundMRI Resource Directory:<br> - Ultrasound Therapy -
 
(MRgFUS) Magnetic resonance guided focused ultrasound is a surgical procedure that uses high intensity focused ultrasound waves to destroy tissue in combination with magnetic resonance imaging (MRI), which guides the treatment.
With focused ultrasound waves uterine fibroids are heated and destroyed (ablated) inside the MRI device , allowing the physician to plan, monitor and control the treatment with temperature sensitive images while it is in progress.
See also High Intensity Focused Ultrasound, and Interventional Ultrasound.
Radiology-tip.comCT Guided Biopsy
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Radiology-tip.comComputer Aided Detection
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• View the news results for 'Magnetic Resonance Guided Focused Ultrasound' (2).



 Further Reading:
  Basics:
Magnetic Resonance guided Focused UltrasoundOpen this link in a new window
   by en.wikipedia.org    
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Radiology  (13) Open this link in a new windowMRI  (48) Open this link in a new window
4D UltrasoundInfoSheet: - Modes - 
Intro, 
Overview, 
Types of, 
etc.MRI Resource Directory:<br> - Modes -
 
As far as ultrasound is concerned, 4D ultrasound (also referred to as live 3D ultrasound or 4B-mode) is the latest ultrasound technology - the fourth dimension means length, width, and depth over time. 4D Ultrasound takes 3D ultrasound images and adds the element of time to the progress so that a moving three-dimensional image is seen on the monitor. A 4D scan takes the same amounts of time as a 2D or 3D scan; the difference is the ultrasound equipment being used. One advantage of a 4D fetal ultrasound to a 2D-mode is that parents can see how their baby will generally look like. However, there are different opinions over the medical advantages.
To scan a 3D ultrasound image, the probe is swept over the maternal abdomen. A computer takes multiple images and renders the 3D picture. With 4D imaging, the computer takes the images as multiple pictures while the probe is hold still and a 3D image is simultaneously rendered in real time on a monitor.
In most cases, the standard 2D ultrasound is taken, and then the 3D/4D scan capability is added if an abnormality is detected or suspected. The 3D/4D sonogram is then focused on a specific area, to provide the details needed to assess and diagnose a suspected problem. A quick 4D scan of the face of the fetus may be performed at the end of a routine exam, providing the parents with a photo.
Radiology-tip.comFluoroscopy
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Radiology-tip.comTemporal Resolution
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• View the news results for '4D Ultrasound' (5).



 Further Reading:
  Basics:
Impulse Imaging 4D Imaging : 4D Ultrasound, 4D Radar, 4D Sonar, ... Real Time 3D Imaging using Ellipsoidal BackprojectionOpen this link in a new window
2001   by www.impulseimaging.net    
  News & More:
Ultrasound: Weighing the Propaganda Against the FactsOpen this link in a new window
   by www.midwiferytoday.com    
US Resources  
Developers - Hospitals - Rental - Quality Advice - Veterinary UltraSound - Software
 
Related Searches:
 • Dynamic Focusing
 • Acoustic Lens
 • Beamforming
 • Focal Zone
 • Depth
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