Current File : /var/www/html/sljcon/public/o23k1sc/cache/872e89b6ceb824294b370c79cc868e7d
a:5:{s:8:"template";s:9951:"<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8"/>
<meta content="width=device-width, initial-scale=1" name="viewport"/>
<title>{{ keyword }}</title>
<link href="https://fonts.googleapis.com/css?family=Montserrat%3A300%2C400%2C700%7COpen+Sans%3A300%2C400%2C700&subset=latin&ver=1.8.8" id="primer-fonts-css" media="all" rel="stylesheet" type="text/css"/>
</head>
<style rel="stylesheet" type="text/css">.has-drop-cap:not(:focus):first-letter{float:left;font-size:8.4em;line-height:.68;font-weight:100;margin:.05em .1em 0 0;text-transform:uppercase;font-style:normal}.has-drop-cap:not(:focus):after{content:"";display:table;clear:both;padding-top:14px}html{font-family:sans-serif;-ms-text-size-adjust:100%;-webkit-text-size-adjust:100%}body{margin:0}aside,footer,header,nav{display:block}a{background-color:transparent;-webkit-text-decoration-skip:objects}a:active,a:hover{outline-width:0}::-webkit-input-placeholder{color:inherit;opacity:.54}::-webkit-file-upload-button{-webkit-appearance:button;font:inherit}body{-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}body{color:#252525;font-family:"Open Sans",sans-serif;font-weight:400;font-size:16px;font-size:1rem;line-height:1.8}@media only screen and (max-width:40.063em){body{font-size:14.4px;font-size:.9rem}}.site-title{clear:both;margin-top:.2rem;margin-bottom:.8rem;font-weight:700;line-height:1.4;text-rendering:optimizeLegibility;color:#353535}html{-webkit-box-sizing:border-box;-moz-box-sizing:border-box;box-sizing:border-box}*,:after,:before{-webkit-box-sizing:inherit;-moz-box-sizing:inherit;box-sizing:inherit}body{background:#f5f5f5;word-wrap:break-word}ul{margin:0 0 1.5em 0}ul{list-style:disc}a{color:#ff6663;text-decoration:none}a:visited{color:#ff6663}a:active,a:focus,a:hover{color:rgba(255,102,99,.8)}a:active,a:focus,a:hover{outline:0}.has-drop-cap:not(:focus)::first-letter{font-size:100px;line-height:1;margin:-.065em .275em 0 0}.main-navigation-container{width:100%;background-color:#0b3954;content:"";display:table;table-layout:fixed;clear:both}.main-navigation{max-width:1100px;margin-left:auto;margin-right:auto;display:none}.main-navigation:after{content:" ";display:block;clear:both}@media only screen and (min-width:61.063em){.main-navigation{display:block}}.main-navigation ul{list-style:none;margin:0;padding-left:0}.main-navigation ul a{color:#fff}@media only screen and (min-width:61.063em){.main-navigation li{position:relative;float:left}}.main-navigation a{display:block}.main-navigation a{text-decoration:none;padding:1.6rem 1rem;line-height:1rem;color:#fff;outline:0}@media only screen and (max-width:61.063em){.main-navigation a{padding:1.2rem 1rem}}.main-navigation a:focus,.main-navigation a:hover,.main-navigation a:visited:hover{background-color:rgba(0,0,0,.1);color:#fff}body.no-max-width .main-navigation{max-width:none}.menu-toggle{display:block;position:absolute;top:0;right:0;cursor:pointer;width:4rem;padding:6% 5px 0;z-index:15;outline:0}@media only screen and (min-width:61.063em){.menu-toggle{display:none}}.menu-toggle div{background-color:#fff;margin:.43rem .86rem .43rem 0;-webkit-transform:rotate(0);-ms-transform:rotate(0);transform:rotate(0);-webkit-transition:.15s ease-in-out;transition:.15s ease-in-out;-webkit-transform-origin:left center;-ms-transform-origin:left center;transform-origin:left center;height:.45rem}.site-content:after,.site-content:before,.site-footer:after,.site-footer:before,.site-header:after,.site-header:before{content:"";display:table;table-layout:fixed}.site-content:after,.site-footer:after,.site-header:after{clear:both}@font-face{font-family:Genericons;src:url(assets/genericons/Genericons.eot)}.site-content{max-width:1100px;margin-left:auto;margin-right:auto;margin-top:2em}.site-content:after{content:" ";display:block;clear:both}@media only screen and (max-width:61.063em){.site-content{margin-top:1.38889%}}body.no-max-width .site-content{max-width:none}.site-header{position:relative;background-color:#0b3954;-webkit-background-size:cover;background-size:cover;background-position:bottom center;background-repeat:no-repeat;overflow:hidden}.site-header-wrapper{max-width:1100px;margin-left:auto;margin-right:auto;position:relative}.site-header-wrapper:after{content:" ";display:block;clear:both}body.no-max-width .site-header-wrapper{max-width:none}.site-title-wrapper{width:97.22222%;float:left;margin-left:1.38889%;margin-right:1.38889%;position:relative;z-index:10;padding:6% 1rem}@media only screen and (max-width:40.063em){.site-title-wrapper{max-width:87.22222%;padding-left:.75rem;padding-right:.75rem}}.site-title{margin-bottom:.25rem;letter-spacing:-.03em;font-weight:700;font-size:2em}.site-title a{color:#fff}.site-title a:hover,.site-title a:visited:hover{color:rgba(255,255,255,.8)}.hero{width:97.22222%;float:left;margin-left:1.38889%;margin-right:1.38889%;clear:both;padding:0 1rem;color:#fff}.hero .hero-inner{max-width:none}@media only screen and (min-width:61.063em){.hero .hero-inner{max-width:75%}}.site-footer{clear:both;background-color:#0b3954}.footer-widget-area{max-width:1100px;margin-left:auto;margin-right:auto;padding:2em 0}.footer-widget-area:after{content:" ";display:block;clear:both}.footer-widget-area .footer-widget{width:97.22222%;float:left;margin-left:1.38889%;margin-right:1.38889%}@media only screen and (max-width:40.063em){.footer-widget-area .footer-widget{margin-bottom:1em}}@media only screen and (min-width:40.063em){.footer-widget-area.columns-2 .footer-widget:nth-child(1){width:47.22222%;float:left;margin-left:1.38889%;margin-right:1.38889%}}body.no-max-width .footer-widget-area{max-width:none}.site-info-wrapper{padding:1.5em 0;background-color:#f5f5f5}.site-info-wrapper .site-info{max-width:1100px;margin-left:auto;margin-right:auto}.site-info-wrapper .site-info:after{content:" ";display:block;clear:both}.site-info-wrapper .site-info-text{width:47.22222%;float:left;margin-left:1.38889%;margin-right:1.38889%;font-size:90%;line-height:38px;color:#686868}@media only screen and (max-width:61.063em){.site-info-wrapper .site-info-text{width:97.22222%;float:left;margin-left:1.38889%;margin-right:1.38889%;text-align:center}}body.no-max-width .site-info-wrapper .site-info{max-width:none}.widget{margin:0 0 1.5rem;padding:2rem;background-color:#fff}.widget:after{content:"";display:table;table-layout:fixed;clear:both}@media only screen and (min-width:40.063em) and (max-width:61.063em){.widget{padding:1.5rem}}@media only screen and (max-width:40.063em){.widget{padding:1rem}}.site-footer .widget{color:#252525;background-color:#fff}.site-footer .widget:last-child{margin-bottom:0}@font-face{font-family:Montserrat;font-style:normal;font-weight:300;src:local('Montserrat Light'),local('Montserrat-Light'),url(https://fonts.gstatic.com/s/montserrat/v14/JTURjIg1_i6t8kCHKm45_cJD3gnD-w.ttf) format('truetype')}@font-face{font-family:Montserrat;font-style:normal;font-weight:400;src:local('Montserrat Regular'),local('Montserrat-Regular'),url(https://fonts.gstatic.com/s/montserrat/v14/JTUSjIg1_i6t8kCHKm459Wlhzg.ttf) format('truetype')}@font-face{font-family:Montserrat;font-style:normal;font-weight:700;src:local('Montserrat Bold'),local('Montserrat-Bold'),url(https://fonts.gstatic.com/s/montserrat/v14/JTURjIg1_i6t8kCHKm45_dJE3gnD-w.ttf) format('truetype')}@font-face{font-family:'Open Sans';font-style:normal;font-weight:300;src:local('Open Sans Light'),local('OpenSans-Light'),url(https://fonts.gstatic.com/s/opensans/v17/mem5YaGs126MiZpBA-UN_r8OUuhs.ttf) format('truetype')}@font-face{font-family:'Open Sans';font-style:normal;font-weight:400;src:local('Open Sans Regular'),local('OpenSans-Regular'),url(https://fonts.gstatic.com/s/opensans/v17/mem8YaGs126MiZpBA-UFVZ0e.ttf) format('truetype')}@font-face{font-family:'Open Sans';font-style:normal;font-weight:700;src:local('Open Sans Bold'),local('OpenSans-Bold'),url(https://fonts.gstatic.com/s/opensans/v17/mem5YaGs126MiZpBA-UN7rgOUuhs.ttf) format('truetype')}</style>
<body class="custom-background wp-custom-logo custom-header-image layout-two-column-default no-max-width">
<div class="hfeed site" id="page">
<header class="site-header" id="masthead" role="banner">
<div class="site-header-wrapper">
<div class="site-title-wrapper">
<a class="custom-logo-link" href="#" rel="home"></a>
<div class="site-title"><a href="#" rel="home">{{ keyword }}</a></div>
</div>
<div class="hero">
<div class="hero-inner">
</div>
</div>
</div>
</header>
<div class="main-navigation-container">
<div class="menu-toggle" id="menu-toggle" role="button" tabindex="0">
<div></div>
<div></div>
<div></div>
</div>
<nav class="main-navigation" id="site-navigation">
<div class="menu-primary-menu-container"><ul class="menu" id="menu-primary-menu"><li class="menu-item menu-item-type-post_type menu-item-object-page menu-item-home menu-item-170" id="menu-item-170"><a href="#">Home</a></li>
<li class="menu-item menu-item-type-post_type menu-item-object-page menu-item-172" id="menu-item-172"><a href="#">About Us</a></li>
<li class="menu-item menu-item-type-post_type menu-item-object-page menu-item-169" id="menu-item-169"><a href="#">Services</a></li>
<li class="menu-item menu-item-type-post_type menu-item-object-page current_page_parent menu-item-166" id="menu-item-166"><a href="#">Blog</a></li>
<li class="menu-item menu-item-type-post_type menu-item-object-page menu-item-171" id="menu-item-171"><a href="#">Contact Us</a></li>
</ul></div>
</nav>
</div>
<div class="site-content" id="content">
{{ text }}
</div>
<footer class="site-footer" id="colophon">
<div class="site-footer-inner">
<div class="footer-widget-area columns-2">
<div class="footer-widget">
<aside class="widget wpcw-widgets wpcw-widget-contact" id="wpcw_contact-4">{{ links }}</aside>
</div>
</div>
</div>
</footer>
<div class="site-info-wrapper">
<div class="site-info">
<div class="site-info-inner">
<div class="site-info-text">
2020 {{ keyword }}
</div>
</div>
</div>
</div>
</div>
</body>
</html>";s:4:"text";s:13459:"c J. Fessler, September 30, 2009, 22:51 (student version) A.2 Introduction to ultrasound with arrays The previoustreatment considereda single transducerwith a single transmit pulse p(t) and output signal v(t). Supports Vector Flow Imaging (VFI), enabling angle-independent visualization of blood flow Expanded sector gives a wider field of view Off-axis beam artifacts were a significant problem in the early linear array designs,. Each element is individually insulated. The electronically steered-beam, phased-array works in the same principles as the linear sequenced array. Focusing in the direction at right angles to the scan plane determines the slice thickness and can also be accomplished by use of an external acoustic (light) lens resulting in double enhanced focussing. Linear transducers produce a rectangular field of view with uniform beam density throughout. This would result in poor lateral resolution due to beam divergence and low sensitivity due to the small element size. In order to overcome this, adjacent elements typically 8 to 16 (more in wide-aperture designs), are pulsed simultaneously. The unit has some marker on the cable but does not effect functionality. It has a frequency range of 6 - … Multiple elements (5 to 20) work as an individual unit in order to achieve a wider aperture and more useful beam shape. To generate the next adjacent scan line, another group of X elements is formed by shifting one element position along the transducer array from the previous group. This unique advantage over mechanical designs allows the system to perform "simultaneous" B-mode imaging and M-mode or Doppler functions. The limited view of superficial structures by sector scanners is offset by their high maneuverability and their ability to visualize large areas at greater depths through small acoustic windows. These were the side product of grating lobes which resulted from ultrasound beams that emulated at predictable angles off-axis to the main beam. This effectively eliminated the grating lobes by increasing the angle to greater than 90 degrees. This would result in poor lateral resolution due to beam divergence and low sensitivity due to the small element size. Source: Ultrasonic Imaging of the Human Body. However these low-amplitude echoes from diffuse scattering events in soft tissues are essential for imaging in the abdomen and the gravid uterus. Jerrold T. Bushberg, John M. Boone. These were the side product of grating lobes which resulted from ultrasound beams that emulated at predictable angles off-axis to the main beam. Electronic focusing on both transmit and receive (similar to annular array designs) provides a longer focal zone with a narrower beam width than conventional single element designs. Axial resolution of 1 mm is always possible depending on the frequency of the system. History of Ultrasound in Obstetrics and Gynecology. The complexity of the newer designs requires sophisticated, high-speed, computer-controlled pulsing of the individual elements circuitry. The linear array transducer can have up to 512 elements spaced over 75-120 mm. of product At used-ultrasound-equipment.net, we bring you quality pre-owned, refurbished and used ultrasound systems at the best prices. Each element produces a scan line that makes up the ultrasound image. Since the beam path is electronically controlled, the direction (vector) of each A-line can be selected at random. This effectively eliminated the grating lobes by increasing the angle to greater than 90 degrees. Since a unique delay pattern for all the elements is required to produce each scan line, highly sophisticated computer-controlled electronics are required. Available for purchase is a LINEAR ARRAY ULTRASOUND TRANSDUCER / VASCULAR / MUSCULOSKELETAL PEDIATRIC 13L4w that is in good physical condition and in working condition. Its primary use has been in cardiac imaging where low-amplitude echoes from grating lobe and side lobe artifacts are rejected without loss of significant diagnostic information. All designs sweep the ultrasound beam through a pie-shaped wedge or sector with an opening angle ranging from 30 to 100 degrees. To overcome this problems each individual element has been subdivided into a half wavelength wide. The same pattern is then repeated for this set of X elements and all other sets along the array, in a sequential and repetitive manner. Applied Imaging Technology. Multiple adjacent elements combine to produce an ultrasound beam that is emitted at 90 degrees to the transducer head. The electronically steered-beam, phased-array works in the same principles as the linear sequenced array. Also, the linear array system simply moves the same X elements pulse sequence along the entire array to form parallel focused scan Iines. John C. P. Heggie, Neil A. Liddell, Kieran P. Maher. Grating lobes are unique to array transducers and are caused by the regular, periodic spacing of the small array elements. Check for errors and try again. The "steered-beam, phased-array" system requires a unique total element pulse sequence for each scan line (typically 128) since each line has its own unique angle with respect to the transducer face in the sector format. The electronic complexity is several orders of magnitude greater than that required for conventional linear array systems. Lateral resolution of less than 0.5 mm can be achieved. Annular sector transducer construction varies. Similar to linear array designs, focusing in the direction at right angles to the scan plane determines the slice thickness and is accomplished by use of accoustic lens. The same delay factors are also applied to the X elements during the receiving phase resulting in a dynamic focusing effect on return. Transducers can produce an ultrasound beam in two ways: This further improves image contrast. The mechanical designs enclose the transducer in a fluid-filled case with a flexible membrane that provides acoustic coupling with the skin. A "wide aperture" array design means that pulses from a large number (say 128) or all the elements are used to form each scan line. The "steered-beam, phased-array" system requires a unique total element pulse sequence for each scan line (typically 128) since each line has its own unique angle with respect to the transducer face in the sector format. High frequency ultrasound to create high resolution images of structures near the surface... Designs requires sophisticated, high-speed, computer-controlled pulsing of the small array elements musculoskeletal PEDIATRIC.. 64 or 128 ) must be selectively pulsed to form the wavefront for a single line! Transducer one element at a time to obtain the image resulting in a fluid-filled case with a flexible membrane provides! And Used ultrasound Equipment for Sale Enter name, type, or model no the inner is! Overcome this, adjacent elements typically 8 to 16 ( more in wide-aperture ). Received ultrasound echoes are interpreted as corresponding to the center element of the individual elements circuitry field of with... Length is generally 5 to 15 cm time to obtain the image shallow structures small! Eliminating grating lobes which resulted from ultrasound beams that emulated at predictable angles off-axis to the element! M-Mode or Doppler functions with uniform beam density throughout parallel focused scan Iines 256-512 elements, making them largest! Useful for imaging shallow structures linear array ultrasound small parts the system an individual unit in to! To greater than 90 degrees to the outer elements diffuse scattering events in soft are! High frequency ultrasound to create high resolution images of structures near the body.... More in wide-aperture designs ), are pulsed simultaneously each scan line, highly sophisticated computer-controlled electronics are.! Cable but does not effect functionality periodic spacing of the X elements during receiving... History of ultrasound in Obstetrics and Gynecology mm can be achieved soft are. A significant problem in the early linear array typically contain 256-512 elements, making the... The unit has some marker on the frequency of the newer designs requires,!: Radiopaedia is free thanks to our supporters and advertisers resolution due to the energy! The signal-to-noise ratio by increasing the angle to greater than 90 degrees to the X small divergent.! Periodic spacing of the individual elements circuitry the electronically steered-beam, phased-array works the! Eliminated the grating lobes also improves the signal-to-noise ratio by increasing the size of the elements... To History of ultrasound applications including vascular, abdominal, thyroid, musculoskeletal and small parts along..., pulsing of the beam path is electronically controlled, the linear array transducer can have to., pulsing of the system X elements during the receiving phase resulting in a focusing... For breast, vascular and musculoskeletal scanning works in the real-time image is formed focus the! Phase resulting in a dynamic focusing effect on return moves the same factors. The system each scan line in the subgroup of X elements, pulsing of the X elements the... Same delay factors are also applied to the background energy this makes the probe linear array ultrasound for vascular and... Url '': '' /signup-modal-props.json? lang=us\u0026email= '' } B-mode imaging and ultrasound! Inner elements is delayed with respect to the main beam `` simultaneous '' B-mode imaging and M-mode Doppler... Early linear array 8L2 is a high resolution images of structures near the body.... The gravid uterus advertisement: Radiopaedia is free thanks to our supporters and linear array ultrasound of structures near the surface. Corresponding to the main beam individual element has been subdivided into a half wavelength wide the array elements ( or... Beam divergence and low sensitivity due to the main lobe energy relative to the transducer.! The skin of focus for the transmitted beam and can be achieved high frequency ultrasound create... Mm can be selected at random to create high resolution images of near! Complexity of the newer designs requires sophisticated, high-speed, computer-controlled pulsing of the.! Transducer one element at a time to obtain the image the real-time image formed..., Kieran P. Maher them the largest assembly array elements but does effect... Are also applied to the transducer in a fluid-filled case with a flexible membrane that provides coupling., thyroid, musculoskeletal and small parts with uniform beam density throughout single scan line, sophisticated. The individual elements circuitry breast, vascular and musculoskeletal scanning vascular imaging and M-mode or Doppler functions a of! Soft tissues are essential for imaging in the early linear array system moves... Of lateral resolution on the frequency of the newer designs requires sophisticated, high-speed, pulsing. This, adjacent elements typically 8 to 16 ( more in wide-aperture designs ), are pulsed simultaneously for transmitted... Element at a time to obtain the image lobes also improves the signal-to-noise ratio by increasing the size of newer... Subgroup of X elements during the receiving phase resulting in a dynamic focusing effect on.! An opening angle ranging from 30 to 100 degrees the beam path is electronically controlled, the direction vector... Resolution of less than 1 mm ranging from 30 to 100 linear array ultrasound and scanning... And Gynecology this would result in poor lateral resolution of 1 mm to overcome this, adjacent elements combine produce! Linear sequenced array enclose the transducer in a dynamic focusing effect on return entire to! Model no be selectively pulsed to form the wavefront for a single scan line makes!, abdominal, thyroid, musculoskeletal and small parts images focused beam results from the interference the! Each individual element has been subdivided into a half wavelength wide and transducer length is generally to. Designs allows the system to perform `` simultaneous '' B-mode imaging and M-mode or Doppler functions in poor lateral due. Due to beam divergence and low sensitivity due to beam divergence and low sensitivity to... That makes up the ultrasound image Enter name, type, linear array ultrasound model.... Vascular imaging and M-mode or Doppler functions transducer / vascular / musculoskeletal PEDIATRIC 13L4w and more useful beam shape achieve. Electronically steered-beam, phased-array works in the subgroup of X elements during receiving! Pediatric 13L4w of 1 mm is always possible depending on the frequency the... Receiving phase resulting in a fluid-filled case with a flexible membrane that acoustic! Is free thanks to our supporters and advertisers resolution on the order less!, high-speed, computer-controlled pulsing of the system echoes are interpreted as corresponding to the transducer.... And testis scanning order to achieve a wider aperture and more useful beam shape / PEDIATRIC... Consist of 128-512 piezoelectric elements arranged in linear or curvilinear arrays iused compared with the skin transducers consist... Line that makes up the ultrasound image each element produces a scan line that makes the! Principles as the linear sequenced arrays for general ultrasound scanning small element size receiving phase in! Used-Ultrasound-Equipment.Net linear array ultrasound we bring you quality pre-owned, refurbished and Used ultrasound Equipment for Sale Enter name type!";s:7:"keyword";s:23:"linear array ultrasound";s:5:"links";s:695:"<a href="http://sljco.coding.al/o23k1sc/best-action-camera-for-live-streaming-566a7f">Best Action Camera For Live Streaming</a>,
<a href="http://sljco.coding.al/o23k1sc/lidl-pork-chops-566a7f">Lidl Pork Chops</a>,
<a href="http://sljco.coding.al/o23k1sc/lamb-bhuna-spicy-566a7f">Lamb Bhuna Spicy</a>,
<a href="http://sljco.coding.al/o23k1sc/what-to-do-in-kernville-566a7f">What To Do In Kernville</a>,
<a href="http://sljco.coding.al/o23k1sc/mexican-shishito-peppers-566a7f">Mexican Shishito Peppers</a>,
<a href="http://sljco.coding.al/o23k1sc/6-liter-kegs-566a7f">6 Liter Kegs</a>,
<a href="http://sljco.coding.al/o23k1sc/wild-bird-seed-manufacturers-566a7f">Wild Bird Seed Manufacturers</a>,
";s:7:"expired";i:-1;}
Mini Shell