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 'Convex Transducer' 
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Convex TransducerInfoSheet: Probes/Transducers
Intro,
Probes, 
TransducersMRI Resource Directory:<br> - Probes Transducers -
 
Convex transducers are today standard on every new scanner. A convex surface allows the scanning of a larger area with a smaller array. The method of focusing and beam sweeping of a convex or curvilinear / curved array is similar to a linear array transducer, except of the shape of the probe and the sector format of the created image.
The better fit to the body, caused by the curved shape with smaller convex contact surface, and the wider field of view further from the transducer face are advantages in abdominal ultrasound.
However, also a convex array is often too large to image the heart when probing between the ribs. Caused by combining a large field of view with smallest array size, phased array transducers are the best choice in cardiac ultrasound.
See also Curved Transducer.
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Ultrasound renal anatomyOpen this link in a new window
   by rad.usuhs.mil    
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UltraSound Physics - Safety - UltraSound Technician and Technologist Career - Devices Machines Scanners Systems - Universities - Supplies and Accessories
 
Convex ProbeInfoSheet: Probes/Transducers
Intro,
Probes, 
TransducersMRI Resource Directory:<br> - Probes Transducers -
 
The convex shape of the probe allows scanning a larger area than with a smaller array. Convex probes produce sector images.
See also Convex Transducer.
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Developers - Distributors - Kidney - Used and Refurbished UltraSound Equipment - Renal - DICOM
 
Curved TransducerInfoSheet: Probes/Transducers
Intro,
Probes, 
TransducersMRI Resource Directory:<br> - Probes Transducers -
 
A curved or curvilinear array transducer is similar to a linear array except that the image created has a sector-type format. A curvilinear array gives a large footprint and near field with a wide sector. Usually, curved transducers are described by the radius of curvature in mm. The transducer elements control the characteristics and direction of the sound beam.
Curvilinear transducers have a wider field of view from the transducer face. Sector scanners are most useful for cardiac ultrasound examinations where the beam is directed between the ribs to image the heart.
Also called convex transducer.
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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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Rectal ProbeInfoSheet: Probes/Transducers
Intro,
Probes, 
TransducersMRI Resource Directory:<br> - Pelvic -
 
A rectal probe is a small ultrasound transducer with high frequency that is inserted directly into the rectum. Transrectal ultrasound is a well established examination for rectal or prostate carcinoma assessment. Rectal probes (e.g., a microconvex probe) generate a much sharper image, caused by the close proximity to the prostate or rectum, and the higher sensitivity.
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 Further Reading:
  Basics:
TRANSRECTAL ULTRASOUND (TRUS) GUIDED BIOPSY OF THE PROSTATE(.pdf)Open this link in a new window
   by urology.ucsf.edu    
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Biplane ultrasound arrays with integrated multiplexing solution for enhanced diagnostic accuracy in endorectal and transvaginal imaging(.pdf)Open this link in a new window
   by www.ncbi.nlm.nih.gov    
US Resources  
Carotid - Abdominal - UltraSound Physics - Fetal - Services and Supplies - Jobs
 
Array TransducerInfoSheet: Probes/Transducers
Intro,
Probes, 
TransducersMRI Resource Directory:<br> - Probes Transducers -
 
An array transducer is composed of multiple piezoelectric crystal elements arranged in an array. Arrays are transducer assemblies with a row of elements, used to focus the beam.

Types of array transducers:
point Linear array transducer = the arrays are arranged along a line.
point Curvilinear or curved transducer = the arrays are arranged along a convex curve. A curved array is similar to a linear array except that the image created is a sector-type.
point Annular array transducer = the arrays are arranged in concentric circles.
point Rectangular array transducer = the arrays are arranged in a rectangular pattern.
See also Amplitude Shading, Transducer Types, and Transducer Assembly.
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 Further Reading:
  Basics:
Transmission Line Matrix (TLM) modelling of medical ultrasound(.pdf)Open this link in a new window
   by www.era.lib.ed.ac.uk    
  News & More:
Ultrasound renal anatomyOpen this link in a new window
   by rad.usuhs.mil    
US Resources  
Online Books - Research Labs - Equipment and Parts - Prenatal - Modes - Image Quality
 
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