[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"detail-sidebar-cat-0-en-105":3,"doc-seo-402483-105":59,"doc-detail-402483-en":130},{"code":4,"msg":5,"data":6},0,"success",[7,13,18,23,28,33,38,43,48,51,55],{"id":8,"doc_module":4,"doc_module_name":9,"category_name":10,"show_sort_weight":11,"slug":12},1,"Document","Story & Novel",90,"story-novel",{"id":14,"doc_module":4,"doc_module_name":9,"category_name":15,"show_sort_weight":16,"slug":17},2,"Literature",80,"literature",{"id":19,"doc_module":4,"doc_module_name":9,"category_name":20,"show_sort_weight":21,"slug":22},4,"Exam",70,"exam",{"id":24,"doc_module":4,"doc_module_name":9,"category_name":25,"show_sort_weight":26,"slug":27},5,"Comic",60,"comic",{"id":29,"doc_module":4,"doc_module_name":9,"category_name":30,"show_sort_weight":31,"slug":32},6,"Technology",50,"technology",{"id":34,"doc_module":4,"doc_module_name":9,"category_name":35,"show_sort_weight":36,"slug":37},7,"Healthcare",40,"healthcare",{"id":39,"doc_module":4,"doc_module_name":9,"category_name":40,"show_sort_weight":41,"slug":42},8,"Research & Report",30,"research-report",{"id":44,"doc_module":4,"doc_module_name":9,"category_name":45,"show_sort_weight":46,"slug":47},9,"Religion & Spirituality",20,"religion-spirituality",{"id":46,"doc_module":4,"doc_module_name":9,"category_name":49,"show_sort_weight":46,"slug":50},"World Cup","world-cup",{"id":52,"doc_module":4,"doc_module_name":9,"category_name":53,"show_sort_weight":52,"slug":54},10,"Lifestyle","lifestyle",{"id":56,"doc_module":4,"doc_module_name":9,"category_name":57,"show_sort_weight":24,"slug":58},19,"General","general",{"code":4,"msg":60,"data":61},"ok",{"site_id":62,"language":63,"slug":64,"title":65,"keywords":66,"description":67,"schema_data":68,"social_meta":123,"head_meta":125,"extra_data":127,"updated_unix":129},105,"en","ultrasound-physics-registry-review-study-guide","Ultrasound Physics Registry Review - Study Guide","","Ultrasound Physics Registry Review study guide covering core ultrasound physics concepts and their practical implications for imaging and Doppler performance. Explains sound as a mechanical longitudinal wave, links frequency, wavelength, period, and propagation speed, and summarizes diagnostic ultrasound frequency ranges. Includes sections on transducer construction, pulse-echo imaging principles, harmonics, artifacts, Doppler and hemodynamics, and safety and quality assurance. Provides measurement concepts such as power, intensity, amplitude, and decibels with examples to support attenuation and gain interpretation.",{"@graph":69,"@context":122},[70,84,105],{"@type":71,"itemListElement":72},"BreadcrumbList",[73,77,79,82],{"item":74,"name":75,"@type":76,"position":8},"https://docshare.wps.com","Home","ListItem",{"item":78,"name":9,"@type":76,"position":14},"https://docshare.wps.com/document/",{"item":80,"name":20,"@type":76,"position":81},"https://docshare.wps.com/document/exam/",3,{"item":83,"name":65,"@type":76,"position":19},"https://docshare.wps.com/document/ultrasound-physics-registry-review-study-guide/402483/",{"url":83,"name":65,"@type":85,"image":86,"author":91,"headline":65,"publisher":94,"fileFormat":97,"inLanguage":63,"description":67,"dateModified":98,"datePublished":99,"encodingFormat":97,"isAccessibleForFree":100,"interactionStatistic":101},"DigitalDocument",{"url":87,"@type":88,"width":89,"height":90},"https://docshare.wps.com/thumbnails/ultrasound-physics-registry-review-study-guide/402483.png","ImageObject",300,407,{"name":92,"@type":93},"Oliver","Person",{"url":74,"name":95,"@type":96},"DocShare","Organization","application/pdf","2026-11-07","2026-09-27",true,{"@type":102,"interactionType":103,"userInteractionCount":52},"InteractionCounter",{"@type":104},"ViewAction",{"@type":106,"mainEntity":107},"FAQPage",[108,114,118],{"name":109,"@type":110,"acceptedAnswer":111},"What does one complete cycle of ultrasound correspond to in wave terms?","Question",{"text":112,"@type":113},"One complete cycle equals one compression and one rarefaction of the mechanical longitudinal wave.","Answer",{"name":115,"@type":110,"acceptedAnswer":116},"How are wavelength and frequency related for sound propagation?",{"text":117,"@type":113},"Wavelength and frequency are inversely related: if one increases, the other decreases, and wavelength is also directly related to propagation speed.",{"name":119,"@type":110,"acceptedAnswer":120},"How should intensity change when gain increases by 3 dB?",{"text":121,"@type":113},"An increase of 3 dB means the intensity doubles; conversely, halving intensity corresponds to a -3 dB change.","https://schema.org",{"og:url":83,"og:type":124,"og:title":65,"og:site_name":95,"og:description":67},"article",{"robots":126,"canonical":83},"index,follow",{"doc_id":128,"site_id":62},402483,1790648347,{"code":4,"msg":5,"data":131},{"doc_id":128,"user_id":132,"nickname":92,"user_avatar":133,"doc_module":4,"category_id":19,"category_name":20,"doc_title":65,"doc_description":67,"doc_content":134,"file_id":135,"file_url":136,"file_type":137,"file_size":138,"view_count":52,"is_deleted":4,"is_public":8,"is_downloadable":8,"audit_status":8,"page_count":139,"language":140,"language_code":63,"site_id":62,"html_lang":63,"table_of_contents":141,"faqs":142,"seo_title":143,"seo_description":67,"update_tm":144,"read_time":145,"preview_page_count":4},8796095461610,"https://ap-avatar.wpscdn.com/davatar_276721f389ce27ea32af1340a28f341c","Study guide to  \nUltrasound Physics Registry Review  \nMelessa Cizik RDMS, RVT [www.myultrasoundtutor.com](www.myultrasoundtutor.com)[ ](www.myultrasoundtutor.com)2020 edition  \nTable of Contents  \nPhysics principles  \nProperties of sound……………………………………………………….……..….1  \nProperties of the medium ..………………………………………………………..3  \nSound propagation in tissue .………………………………………………..……4  \nResolution……………………………………………………………………………8  \nTransducers  \nConstruction and function…….………………………………………………….11  \nTypes……………….………………………………………………………….……13  \nImaging Principles and Instrumentation Pulse-echo principle and modes.………………………………………………..17  \nImage processing and Instrumentation ……………………….…………….….18  \nHarmonics..…………………………………………………………………………24  \nArtifacts .……………………………………………………………………………25  \nDoppler and Hemodynamics Doppler principles and Instrumentation ……………………….………………28  \nHemodynamics ……………………………………………………………………34  \nSafety and Quality Assurance Bioeffects and safety ……………………………………………….……………39  \nQuality Assurance ………………………………………..………………………41  \nNew technologies ………………………………………..………………………43  \nUltrasound Physics Review  \nPhysics principles (15%)  \nProperties of sound  \nSound is a mechanical, longitudinal wave. Longitudinal means parallel from sound source. Mechanically moves through medium by vibration of molecules or physically changing pressure, compressions (high pressure) and rarefactions (low pressure) One complete cycle = 1 compression and 1 rarefaction  \nFrequency \\# cycles per second Hz Wavelength length of one cycle mm  \nPeriod time of one cycle µs  \nƛ = cf  \nƛ = wavelength c = prop speed f = frequency  \nRelationships  \nDirect: If one increases, the other increases and vice versa (go together)  \nInverse: If one increases, the other decreases (opposites)  \nWavelength depends on 2 things-frequency (determined sound source) and propagation speed (determined by medium)  \nWavelength and frequency are inversely related Wavelength directly related to propagation speed  \nMediums with fast prop speed = longer wavelength  \nMediums with slower prop speed = shorter wavelength Propagation speed is NOT affected by either freq or wavelength  \nThink about the terms! Physics is very literal. If you do not know what something means, think about what it means in everyday language.  \nExample: frequency means how often something happens in a period of time. So in ultrasound, it means how many waves occur in one second  \nDifferent types of sound  \n• Infrasound \u003C 20 Hz  \n• Audible sound 20-20,000 Hz  \n• Ultrasound >20,000 Hz  \n• Diagnostic US 2-20 MHz  \nCommon unit prefixes  \nkila(k) = thousand mega(M) = million centi(c) = 1/100  \nmilli(m) = 1/1,000  \nmicro(µ) = 1/1,000,000  \nSimply exchange the word with the prefix Example: 20,000 Hz = 20kHz  \nNot for Distribution 1  \nUltrasound Physics Review  \nMeasuring energy  \nPower- rate of flow of energy (Watts)  \nIntensity-power/area (Watts/cm²)  \nExample: 40 Watt light bulb. That’s power. Imagine the 40W bulb in a small closet vs it in a large room. Which appears more intense? The closet = smaller space = greater intensity.  \nIncrease the space = decreases the intensity  \nAmplitude-height of pressure wave (MPa megapascals) . Hydrophone: used to measure the profile of US beam by measuring the pressure amplitudes (intensities)  \nThese describe the strength of the energy. These are NOT related to frequency/wavelength/period.  \nDecibels  \nIn US, we use deciBels to describe the relative intensity of our wave. We only care about what happened to the intensity, not the value.  \nIn other words, to describe HOW much our intensity has changed, we use deciBels.  \nWhen we multiply our intensity by 2 = rise of 3 dB (increase or gain) If we half the intensity = loss of 3 dB (decrease or attenuation) Half-value layer= when sound reaches 1/2 its original intensity = -3dB  \nQ: A reduction of 6dB means the intensity is reduced by how much?  \n(we will see more about dB affects us when we look at attenuation)  \n\n| Intensity | Decibels |\n| --- | --- |\n|","cbCaif4nk8l81ebf","https://ap.wps.com/l/cbCaif4nk8l81ebf","pdf",7554163,46,"English","# Physics principles\n## Properties of sound\n## Properties of the medium\n## Sound propagation in tissue\n## Resolution\n# Transducers\n## Construction and function\n## Types\n# Imaging Principles and Instrumentation\n## Pulse-echo principle and modes\n## Image processing and Instrumentation\n## Harmonics\n## Artifacts\n# Doppler and Hemodynamics\n## Doppler principles and Instrumentation\n## Hemodynamics\n# Safety and Quality Assurance\n## Bioeffects and safety\n## Quality Assurance\n## New technologies","[{\"question\":\"What does one complete cycle of ultrasound correspond to in wave terms?\",\"answer\":\"One complete cycle equals one compression and one rarefaction of the mechanical longitudinal wave.\"},{\"question\":\"How are wavelength and frequency related for sound propagation?\",\"answer\":\"Wavelength and frequency are inversely related: if one increases, the other decreases, and wavelength is also directly related to propagation speed.\"},{\"question\":\"How should intensity change when gain increases by 3 dB?\",\"answer\":\"An increase of 3 dB means the intensity doubles; conversely, halving intensity corresponds to a -3 dB change.\"}]","Ultrasound Physics Registry Review - Study Guide | PDF",1790531010,116]