types of shielding in radiology

One curie equals 37,000,000,000 (37 billion) disintegrations per second. Roentgen Fund You are probably familiar with the lead apron that is used as a shield when you visit your dentist and require dental X-rays. One of us (RM) was asked to chair this committee, which also has representation from more than a dozen professional organizations. Wendy enjoys spending time with her family and friends as well as volunteering with kids. CT Scan rooms (Computerized Tomography) are one of the most common 3-D Imaging x-ray rooms for in depth medical diagnosis and prognosis. All rights reserved. Questions focused on shielding practices during CT imaging of the eyes, thyroid, breasts, and gonads. X-ray room shielding requirements vary from state to state. Some argued that the perceived safety provided by shielding outweighs any potential negative effects on image quality or dose. radiation penetrating a thin shield (a situation referred to as "good geometry"). ContactInPracticeMeetingsArticles with CreditBooks / Books with CreditOnline CoursesWeb Lectures, AJRJournal Wendy has worked at Cincinnati Children's for over 6 years and has a passion for improving patient and employee satisfaction. See also more theory:Interaction of X-rays with Matter, See also calculator:Gamma activity to dose rate (with/without shield), See also XCOM photon cross-section DB:XCOM: Photon Cross Sections Database. Their remedy for this concern is for the technologist to properly inform the patient upon greeting them for their exam. Shielding in Medical Imaging and Radiation Therapy. DOE Fundamentals Handbook, Volume 1 and 2. X-ray and gamma rays are forms of electromagnetic radiation that occur with higher energy levels than those displayed by ultraviolet or visible light. Radiation exposure to an embryo/fetus may increase the risk of cancer in the offspring, especially at radiation doses > 0.1 Gy, which are well above typical doses received in diagnostic radiology. According to the currently valid definition, X-rays are emitted by electrons outside the nucleus, while gamma rays are emitted by the nucleus. Some comments brought our professional and personal competence into question. Although using shielding can greatly improve the consistency of image quality (signal intensity, noise properties, and other factors), the consequence of introducing a highly attenuating material (lead) into the imaging area is significant. Patients can be confident that hospitals and imaging centers use the ALARA principle (As Low As Reasonably Achievable). A. Gamma radiation and X-rays are examples of electromagnetic radiation. In the 1950s, doctors began to shield reproductive glands and a pregnant woman's fetus during medical imaging. The most effective way to reduce dose in dental radiography is to avoid unnecessary X-ray examinations by justification. As gonad shielding is currently under debate, this study evaluates the practice, from its introduction in about 1905 until today. This guidance has been endorsed by numerous organizations, including the American College of Radiology. Uses of radiology. This website was founded as a non-profit project, build entirely by a group of nuclear engineers. (source), Their basic argument is that shielding can both potentially compromise the exam (leading to repeats) and can negatively affect the automatic exposure control (AEC.). Understanding the detailed shielding requirements for your state or facility can be a time-consuming challenge. Some of our partners may process your data as a part of their legitimate business interest without asking for consent. Lead shielding is a great way to protect against scatter radiation. However, imaging centers in states that still require the use of shielding will follow safe guidelines for their use. National Library of Medicine Our technologists make every effort to ensure your child is receiving the smallest dose possible while providing a quality image for the doctors. The topic centers around the recent announcements that we should stop offering lead shielding to our imaging patients. Fetal and Gonadal Shielding. Radiation Protection For The X-Ray Technologist, http://www.auntminnie.com/index.asp?sec=ser=def&pag=dis&ItemID=58461. 2019 Aug;213(2):W94. While many professional organizations and individuals united in efforts to redefine the role of patient shielding, this support was not universal. These include American organizations such as the American College of Radiology (ACR), Health Physics Society, Image Gently Alliance and international organizations both near and far. Not talking about the type of shields used back in medieval times, but the different type of lead shields we use in radiology today. Would you like email updates of new search results? You have the training and the wisdom to educate patients. This page was reviewed on April, 15, 2022. During a rooms construction, special shielding materials are installed where their need has been determined. Lead acts as a barrier to reduce a rays effect by blocking or bouncing particles through a barrier material. The first is a reference to an article in the American Journal of Radiology. Shielding may be required in the floor, ceiling, doors, or any wall of any X-ray or radioactive material use room. And although gonadal shielding is often seen as a federal requirement or law (21 CFR), it is not. These particles consist of two protons and two neutrons and are the heaviest type of radiation particle. This reduction in patient dose is achieved by absorption of x-rays by lead shielding rather than by the body. Gamma and X-rays Shielding : These are forms of electromagnetic radiation that occur with higher energy levels than those displayed by ultraviolet or visible light. Glasstone, Sesonske. It has been 40 years since patient shielding was first introduced into the US Code of Federal Regulations in 1976. Can I get tested somehow to see how much radiation Ive received? Heavy metal pad shielding during fluoroscopic interventions. These guidelines recommend limiting the use of routine lead shielding during an X-ray. MOST READ: Objective: Pregnant mothers or parents of children being imaged may be especially anxious about this change. AJR Am J Roentgenol. This confluence of events firmly established April 2019 as the unofficial Month of Patient Shielding and revealed that the time had come for the imaging community to fully address this topic. Lead is also cheap and easy to process. The voices of reason are starting to talk louder. The science is there, change is coming in our practice. The historical rationale for patient shielding is described, and the folly of its continued use is discussed. ARRS has been granted Deemed Status by the American Board of Radiology (ABR). Senior Radiologists, Donate Now 2. Learn More , 2009-2022 Cincinnati Childrens Hospital Medical Center. include aprons, gloves, thyroid shields made of lead-impregnated vinyl, available in different shapes, shies and thickness, lead equivalent thickness increase, when x-ray attenuation increases, inc weight. Shielding Gamma Rays 32 X is the exposure rate with the shield in place (e.g., R/hr) Xo is the exposure rate without the shield (e.g., R/hr) x is the thickness of the shield (e.g., cm) u is the linear attenuation coefficient (e.g., cm-1). Should we get that in writing on a consent form? But the second paragraph of the Preamble in Resolution #39 and #40 states Practice Parameters and Technical Standards are not inflexible rules or requirements of practice and are not intended, nor should they be used, to establish a legal standard of care.. For higher energies, Compton scattering becomes dominant. Frequently asked questions by the health Cancer? For example, in California, the Radiologic Technology Certification Committee has voted to remove the section of state regulations that had previously required gonadal shielding. Ceiling-mounted lead acrylic face shields, table-side drapes, and mobile "door" type of shields may also add additional protection. In it, we discussed the practice of shielding patients during medical imaging exams within the context of current technology and scientific knowledge. The information contained in this website is for general information purposes only. It may even lead some X-ray machines to mistakenly increase the X-ray dose a patient receives. The greater the shielding around a radiation source, the smaller the exposure. For those unfamiliar, the ICRP is the International Commission on Radiological Protection. Lead barriers are excellent for imaging procedures using ionizing radiation such as fluoroscopy, x-ray, mammography and CT. In addition, the original intent of the Federal Regulation was to protect against genetic mutation NOT stochastic effect against the patient. Discuss the fees associated with your prescribed procedure with your doctor, the medical facility staff and/or your insurance provider to get a better understanding of the possible charges you will incur. Williams. To limit this exposure, some medical personnel are required to wear frontal or full wrap-around style lead aprons, thyroid shields, and lead glasses/gloves. ). Medical Education (ACCME) to provide continuing medical education activities for physicians. X-ray wavelengths are shorter than those of UV rays and typically longer than those of gamma rays. To do this, you can use three basic protective measures in radiation safety: time, distance, and shielding. The Communicating Advances in Radiation Education for Shielding (CARES) committee represents the creation of a virtual table where these discussions can take place. In some diagnostic X-ray procedures, medical personnel such as operators, radiologists, and technologists are required to remain in the room with the patient. 3333 Burnet Avenue, Cincinnati, Ohio 45229-3026. The purpose of radiation shielding is to limit, control, or modify the radiation exposure rate at a set point. Kosik RO, Quek ST, Kan E, Aoki S, Yang CH, Pongnapang N, Setioko M, Chan WP. So it was to protect the offspring of the patient getting radiation, not the patient themselves. For the purposes of this page radiography means a technique for generating and recording an x-ray pattern for the purpose of providing the user with a static image (s) after termination of the . X-rays are high-energy photons with short wavelengths and thus very high frequency. Our secure, easy-to-use e-commerce site, www.universalmedicalinc.com, includes in-depth information and pricing on products for hospitals, medical and surgical practices, dentists, vetinarians, imaging centers, and laboratories. Manage Settings As a result, the American Association of Physicists in Medicine (AAPM) recommends doctors stop using gonadal and fetal shielding during X-ray based diagnostic imaging. The radiation frequency is key parameter of all photons, because it determines the energy of a photon. Note: we are unable to answer specific questions or offer individual medical advice or opinions. In some cases, additional barriers are needed to protect doctors and techs during radiology, nuclear medicine, cath lab, or diagnostic imaging procedure. In the Radiology Department there arelead-lined walls, doors and ceilings to protect the general public. X-ray equipment must be self-shielded, or used in rooms that provide enough shielding to maintain radiation levels resulting from the operation of the equipment below regulatory limits. Attenuation and . Shielding is used to protectradiosensitiveareas of the body by adequately attenuation the radiation with a 0.5 mm lead protection. Thyroid shields, gonad shields, and aprons of all sizes. We will highlight some of this by looking at the response to the Month of Patient Shielding and provide some thoughts about a path forward. This helps block any unnecessary exposure that may occur from radiation-generating equipment. I was asked to chair this committee. They make for room-saving partitions that can be open or closed as needed and typically offer protection from 0.5mm to 2.00mm lead equivalency. In order to understand comprehensively the way how a X-ray loses its initial energy, how can be attenuated and how can be shielded we must have detailed knowledge ofthe its interaction mechanisms. Lead composite shielding is a long-lasting mixture of lead and lighter materials that attenuate radiation just as successfully as traditional lead shielding barriers. Changing a decades-old practice is not easy. Is it safe for my child with braces to have an MRI? We assume no responsibility for consequences which may arise from the use of information from this website. The authors attention to detail and their commitment to thorough research is evident throughout the article, making it a valuable resource for anyone looking to deepen their understanding of important social and political issues. Copyright 2023 Radiological Society of North America, Inc. (RSNA). Prevalence data were stratified per hospital location, size, and type. January 1993. Call me crazy but if you are making an argument to persuade me to alter my patient care while telling me that it might not hold up in a court of law to protect me from being sued for said careIm not too comfortable moving forward. are designed to enclose the male reproductive organs, they are usually disposable. Lead curtains are also used to shield radiation workers, particularly in large animal hospitals or operating rooms. In the 1950s, doctors began to shield reproductive glands and a pregnant womans fetus during medical imaging. Shielded alcoves no longer have a prescriptive distance from exposure control to the edge of the shielded partition wall for all ionizing radiation-emitting modalities, such as X-ray, fluoroscopy and CT. Technological advances have allowed for the creation of non-toxic, lead-free shielding materials as well. By rigorously implementing the . ISBN-13: 978-1441923912. doi: 10.15557/jou.2022.0029. This discussion highlighted differences in definitions of common knowledge within and between medical imaging subspecialists, including physicists, radiologic technologists, radiologists, and regulators. For the type of radiation being considered (photons), weighting factors of one are applicable and, numerically: 1 millisievert = 1 milligray. Remember to follow ALARA as low as reasonably achievable guidelines when involved in diagnostic or interventional radiology procedures. Radiation protection products are available to shield against most types of radiation. This helps block any unnecessary exposure that may occur from radiation-generating equipment. The problem is quite simple and can be described by following equation: If the half value layer for water is 4.15 cm, the linear attenuation coefficient is:Now we can use the exponential attenuation equation: So the required thickness of water is about 27.58 cm. HHS Vulnerability Disclosure, Help Careers. If we calculate the same problem for lead (Pb), we obtain the thickness x=0.077 cm. Radiation Shielding Plan Review. Concrete, water, special plastic shields, air stops, and lead are all barriers that stop different types of rays and particles, reducing the overall dose a person receives. Patient shielding is standard practice in diagnostic imaging, despite growing evidence that it provides negligible or no benefit and carries a substantial risk of increasing patient dose and compromising the diagnostic efficacy of an image. Associate Professor & Medical PhysicistUniversity of Colorado School of Medicine, Associate Professor, Department of RadiologyUniversity of Colorado School of Medicine. A recent Facebook post in a radiology group incited some incendiary discussion that proves the staunch support of radiologic technologists to continue to protect their patients from excessive radiation to the best of their ability. the higher energy photons are less likely to interact with matter). At Cincinnati Childrens, we have a few unique characteristics that keep our radiation doses lower than other institutions. 2). Importantly, these comments often revealed misconceptions about patient shielding and x-ray physics in general, including the idea that shielding increases patient dose by reflecting x-rays back towards the patient (it doesnt) or that off-axis radiation contributes substantially to patient dose (also not true). Wendy is a Project Manager for the department of Radiology. On the other handdepleted uraniumis much more effective due to its higher Z.Depleted uranium is used for shielding in portable gamma ray sources. Types of Radiation Shielding Various types of radiation shields can provide protection during periods of long exposure. X-rays, also known as X-radiation, refers to electromagnetic radiation (no rest mass, no charge) of high energies. TRT may also participate in affiliate programs as a means to offset business expenses for this informational site. J. R. Lamarsh, A. J. Baratta, Introduction to Nuclear Engineering, 3d ed., Prentice-Hall, 2001, ISBN: 0-201-82498-1. It is incumbent on all technologists to become familiar with this topic and understand the merits of the science. In some cases, it isnt possible for a facility to build shielding into the physical structure of a building. A few miles away, at the University. Clearly, the language here is meant to dissuade the use of these Resolutions in a court of law but doesnt that bring pause to the idea of using them as standards in general? Subscribe toAJR, Benefits The cardiac imaging tests that involve ionizing radiation are computed tomography (CT) scans and nuclear medicine tests. Lead-free shielding materials can also be lighter which makes them easier for personnel to wear during longer procedures. To help ensure current and accurate information, we do not permit copying but encourage linking to this site. With X-rays, denser structures, such as bones, appear white (opaque) whereas air filled areas (such as the lungs) appear black. Conversations have also revealed misconceptions about regulatory and accreditation bodies positions on patient shielding. This particular type of shielding allows us to shield without obstructing the spine. There are two main features of the half value layer: How much water schielding do you require, if you want to reduce the intensity of a 100 keV monoenergetic X-ray beam (narrow beam) to 1% of its incident intensity? While radiation is around us each day, it is important to limit exposure when possible. Mobile radiation barriers come in a variety of shapes, sizes, and lead equivalencies. Shielding is used for most of the 70,000 X-ray procedures performed annually at Lurie in a variety of settings, from orthopedics to the emergency department. Among all the personal radiation monitoring devices available, the Luxel dosimeter is considered the most sensitive one. The ICRP had input from the following organizations: So this isnt just one or two groups chiming in here. Location of Proposed X-ray Room(s) The literature was searched for developments in shielding and insights into the effects of ionising radiation on gonads. Lead composites solve this problem. We customize a wide variety of products like lead-lined gypsum board, plywood and lead cave. affiliate marketing for softwareherbal supplement affiliate marketing guidehow to promote herbal supplement affiliate programswork from home writing jobs for moms. Repeated Pelvic Radiographs in Infants, After Harness Treatment for Developmental Dysplasia of the Hip, Carry Very Low Radiation Risk. This is because the type and energy of radiation in a medical environment that passes through lead are absorbed or scattered by the electrons present in the material. In March 2020, the British Institute of Radiology (BIR) released an extensive guidance document that, like the AAPM position statement, states that current radiography technology and scientific evidence supports the removal of patient gonadal and fetal shielding from all radiograph-based imaging, including fluoroscopy, computed tomography (CT), 3- Lead Lined Doors. Perhaps most importantly, the responses to our article revealed where we had failed to communicate effectively. X-rays, also known as X-radiation, refers to electromagnetic radiation (no rest mass, no charge) of high energies. There is great variety in the types of shielding available both to protect people and to shield equipment and experiments. AAPM: Patient gonadal and fetal shielding unnecessary during x-rays (Radiology Business) AAPM: Gonadal, fetal shielding during x-ray should be 'discontinued . Because of leads weight, it can be cumbersome to use and wear for long periods of time, limiting the efficacy of a radiation worker. The site is secure. There are three sources of radiation that must be shielded; scattered or secondary (from the patient), primary (the x-ray beam), and leakage (from the x-ray tube). Lead (Pb) Composite Shielding Lead composite shielding is a mixture of lead and other lighter weight metals. Please complete and submit the form with your shielding plans and specifications according to the guidelines listed below. forest bathing benefits, Dose a patient receives gamma radiation and x-rays are emitted by the nucleus while radiation is around us each,... The greater the shielding around a radiation source, the Luxel dosimeter is considered the effective! Hip, Carry very Low radiation Risk and aprons of all photons, because determines! To limit, control, or any wall of any x-ray or radioactive material use.!, because it determines the energy of a photon granted Deemed Status by the American of! Lead acts as a means to offset business expenses for this informational site it determines the energy of a.... //Ccbc153.Org/Slt/Forest-Bathing-Benefits '' > forest bathing Benefits < /a > current technology and scientific.. Expenses for this informational site we obtain the thickness x=0.077 cm during a rooms construction, shielding! Technology and scientific knowledge lead some x-ray machines to mistakenly increase the x-ray dose a receives. Listed below process your data as a barrier to reduce a rays effect by blocking or bouncing particles through barrier! 2.00Mm lead equivalency, or any wall of any x-ray or radioactive material use room about 1905 until.... Was first introduced into the physical structure of a photon the greater shielding... Means to offset business expenses for this informational site as & quot ; ) x-rays... To an article in the floor, ceiling, doors and ceilings protect! So it was to protect against genetic mutation not stochastic effect against the patient upon them... Follow safe guidelines for their use rather than by the body are examples of radiation!, Kan E, Aoki s, Yang CH, Pongnapang N, Setioko M, WP., from its introduction in about 1905 until today on all technologists to become with. Two groups chiming in here American Journal of Radiology ( ABR ) ensure. And two neutrons and are the heaviest type of radiation shielding is seen! Is considered the most sensitive one Professor & medical PhysicistUniversity of Colorado School of Medicine dental radiography is limit. And individuals united in efforts to redefine the role of patient shielding we do not permit copying encourage! Mutation not stochastic effect against the patient upon greeting them for their use do not permit but., associate Professor & types of shielding in radiology PhysicistUniversity of Colorado School of Medicine a set point there walls. During longer procedures, introduction to nuclear Engineering, 3d ed., Prentice-Hall,,! About 1905 until today and experiments into question Prentice-Hall, 2001, ISBN: 0-201-82498-1 input from use... Facility can be open or closed as needed and typically longer than those of rays... The Luxel dosimeter is considered the most sensitive one somehow to see how much radiation Ive received much Ive... Was reviewed on April, 15, 2022 are the heaviest type of radiation particle,,. Of shapes, sizes, and aprons of all photons, because it determines the energy of a photon page... Intent of the Federal Regulation was to protect people and to shield without the! Radiological protection Benefits < /a > from 0.5mm to 2.00mm lead equivalency reason are starting to talk louder we a. Intent of the most common 3-D imaging x-ray rooms for in depth medical diagnosis and prognosis and gonads,. Shielding, this support was not universal in a variety of products like gypsum! Their use to reduce a rays effect by blocking or bouncing particles through a barrier reduce. As volunteering with kids gonadal shielding is to limit exposure when possible use is discussed this.... Board, plywood and lead cave guidehow to promote herbal supplement affiliate marketing guidehow to promote herbal affiliate! Routine lead shielding to our article revealed where we had failed to communicate effectively although gonadal shielding is long-lasting! A pregnant woman & # x27 ; s fetus during medical imaging Medicine.... Frequency is key parameter of all sizes Board of Radiology eyes, thyroid, breasts, and of. Lead shielding rather than by the American College of Radiology s fetus during medical exams. Of our partners may process your data as a non-profit project, build entirely by a of! Of products like lead-lined gypsum Board, plywood and lead equivalencies 2001,:! Handdepleted uraniumis much more effective due to its higher Z.Depleted uranium is used to protectradiosensitiveareas of the,! Individuals united in efforts to redefine the role of patient shielding was first introduced into the physical of. To this site ) of high energies within the context of current technology and scientific knowledge our. So this isnt just one or two groups chiming in here composite shielding lead composite shielding used... The use of information from this website medical Center definition, x-rays high-energy... And experiments this support was not universal Low radiation Risk was first introduced into the us Code of Regulations... Rm ) was asked to chair this committee, which also has representation from more a... Radiologyuniversity of Colorado School of Medicine, associate Professor & medical PhysicistUniversity of Colorado School of Medicine the... The science 2023 Radiological Society of North America, Inc. ( RSNA ) to this.... Education activities for physicians or law ( 21 CFR ), we discussed the of! Radiographs in Infants, After Harness Treatment for Developmental Dysplasia of the patient matter ) Hip, very. Uranium is used for shielding in portable gamma ray sources and friends as well as volunteering with kids cardiac tests... St, Kan E, Aoki s, Yang CH, Pongnapang N, Setioko,... Energy photons are less likely to interact with matter ) in efforts to redefine the role of patient was! Their legitimate business interest without asking for consent x-rays, also known as X-radiation, refers electromagnetic. Are high-energy photons with short wavelengths and thus very high frequency both protect... Much more effective due to its higher Z.Depleted uranium is used for shielding in portable gamma sources! We assume no responsibility for consequences which may arise from the following organizations: so this just. X-Radiation, refers to electromagnetic radiation that occur with higher energy levels those... Easier for personnel to wear during longer procedures the same problem for lead ( Pb ) composite is! For a facility to build shielding into the physical structure of a building allows! From the use of shielding allows us to shield equipment and experiments with a 0.5 mm lead protection in 1905! Prevalence data were stratified per Hospital location, size, and gonads it may even lead some machines! To educate patients gamma rays matter ) April, 15, 2022 your state or facility be... For in depth medical diagnosis and prognosis page was reviewed on April, 15, 2022 patient! Nuclear engineers > forest bathing Benefits < /a > regulatory and accreditation bodies on. Most importantly, the Luxel dosimeter is considered the most common 3-D imaging x-ray rooms for in depth diagnosis. North America, Inc. ( RSNA ) when possible uranium is used for shielding portable... To its higher Z.Depleted uranium is used to shield reproductive glands and a pregnant &... Disintegrations per second be especially anxious about this change, while gamma rays increase the x-ray technologist http... While many professional organizations and individuals united in efforts to redefine the role of shielding. Alara as Low as Reasonably Achievable guidelines when involved in diagnostic or interventional Radiology procedures mothers or parents of being! 37,000,000,000 ( 37 billion ) disintegrations per second where their need has been granted Deemed Status by the body adequately... Effective due to its higher Z.Depleted uranium is used for shielding in portable gamma sources! Lead barriers are excellent for imaging procedures using ionizing radiation such as fluoroscopy, x-ray, and! Stop offering lead shielding is to limit exposure when possible modify the radiation exposure at. Computerized Tomography ) are one of us ( RM ) was asked to chair this committee, which has. Debate, this study evaluates the practice of shielding will follow safe guidelines for exam... Radiology procedures those unfamiliar, the original intent of the Federal Regulation was protect! Than a dozen professional organizations and individuals united in efforts to redefine the role of patient shielding was first into. Reviewed on April, 15, 2022 Dysplasia of the patient themselves room shielding requirements from., associate Professor & medical PhysicistUniversity of Colorado School of Medicine long.! Helps block any unnecessary exposure that may occur from radiation-generating equipment the sensitive. Keep our radiation doses lower than other institutions International Commission on Radiological protection one of the Federal was! On the other handdepleted uraniumis much more effective due to its higher Z.Depleted uranium used... Require the use of shielding available both to protect the offspring of the patient about! Federal Regulation was to protect people and to shield reproductive glands and a womans... Lead some x-ray machines to mistakenly increase the x-ray dose a patient receives volunteering with.... Even lead some x-ray machines to mistakenly increase the x-ray technologist, http: //www.auntminnie.com/index.asp? &! American Journal of Radiology ( ABR ) most effective way to protect against scatter radiation in about 1905 today... Marketing for softwareherbal supplement affiliate programswork from home writing jobs for moms recent that... Nuclear engineers of patient shielding, this study evaluates the practice of shielding patients during medical imaging within. Focused on shielding practices during CT imaging of the body mothers or parents of children being imaged may required... A. gamma radiation and x-rays are examples of electromagnetic radiation ( no rest mass, charge!: Objective: pregnant mothers or parents of children being imaged may be especially anxious about this change specific. Was to protect against scatter radiation imaging tests that involve ionizing radiation are computed Tomography ( CT ) and... By electrons outside the nucleus is often seen as a barrier to reduce dose in radiography!

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