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 'D-Scan' 
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Result : Searchterm 'D-Scan' found in 1 term [] and 2 definitions [])
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D-ScanInfoSheet: - Modes - 
Intro, 
Overview, 
Types of, 
etc.MRI Resource Directory:<br> - Modes -
 
B-scan comined with D-scan (D=Depth) is used to avoid image inhomogeneity. Different transmitter signals for each depth are applied and prefiltered pseudoinversely according to the transfer properties of the covering tissue. Pulse compression techniques with nonlinearly frequency modulated signals are used to gain the required energy for inverse filtering.
D-scan is a modified C-scan used in nondestructive testing with the display of amplitudes. In the 2D graphical presentation, time of flight values are displayed in the top view on a test surface.
See also A-Scan, B-Scan and C-Scan.
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A-ScanMRI Resource Directory:<br> - Modes -
 
A-scans are used in ophthalmologic scanning, to detect and monitor pregnancy problems, and screen intracranial mass lesions by using A-modes.
A-scan ultrasound biometry, commonly referred to as an A-scan, is a routine diagnostic test used in ophthalmology. The A-scan provides data on the shape of the eye, which is a major determinant in common sight disorders.
Ultrasound scanners used in this type of test require usually direct contact with the eye.
See also A-Mode, Oculoplethysmography, Ultrasound Biomicroscopy, B-Scan, C-Scan and D-Scan.
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 Further Reading:
  Basics:
Medical Physics: Ultrasound - extended reading exerciseOpen this link in a new window
   by www.cyberphysics.pwp.blueyonder.co.uk    
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Evaluation of the validity and reliability of A-scan ultrasound biometry with a single use disposable coverOpen this link in a new window
2002   by bjo.bmjjournals.com    
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B-ScanMRI Resource Directory:<br> - Modes -
 
B-scan ultrasonography, or B-scan, is a diagnostic test, for example used in ophthalmology to produce a two-dimensional, cross-sectional view of the eye and the orbit. The presentation of the reflected pulses are displayed in rectangular coordinates, in which the travel time of an ultrasound pulse is represented as a shift along one axis, and the probe movement is represented as a shift along the other axis.
See also Ultrasound Imaging Procedures, A-Scan, C-Scan and D-Scan.
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 Further Reading:
  Basics:
Medical Physics: Ultrasound - extended reading exerciseOpen this link in a new window
   by www.cyberphysics.pwp.blueyonder.co.uk    
  News & More:
Ultrasonographic fata morganaOpen this link in a new window
2003   by ndt.oxfordjournals.org    
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