UltraSound - Technology Information PortalFriday, 19 April 2019
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 'Subdicing' 
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SubdicingMRI Resource Directory:<br> - UltraSound Physics -
 
Subdicing is a technique used to overcome grating lobes. With subdicing each major transducer element is divided into smaller parts, each one being a half wave length.
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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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Grating-Lobe ArtifactInfoSheet: - Artifacts - 
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ReductionMRI Resource Directory:<br> - Artifacts -
 
The dimension of the ultrasound beam and the transducer array are the origin of grating-lobe artifacts (also called side lobe artifact). Grating lobes as side lobes are off-axis secondary ultrasound beams projecting at predictable angles to the main lobe. Side lobes are too small to produce important artifacts.
See also Apodization, and Subdicing.
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