I guess archaeologists probably use some sort of x-ray on a casket before cracking it open. Study.com has thousands of articles about every Computed Tomography is used to give technologists and doctors an inside look at the body’s primary organs. 's' : ''}}. Usually the specimen is kept still, and keeping still is an important direction in medical imaging to ensure crisp images. As with other imaging techniques which bombard objects with energy, tomography can be dangerous. Also, she only has to have one every three years. Medical Disclaimer: The information on this site is for your information only and is not a substitute for professional medical advice. The term “computed tomography”, or CT, refers to a computerized x-ray imaging procedure in which a narrow beam of x-rays is aimed at a patient and quickly rotated around the body, producing signals that are processed by the machine’s computer to generate cross-sectional images—or “slices”—of the body. That is why patients always have to wear lead aprons while having them done. My elbow once bumped the sides of the tunnel, and that freaked me out a little to know that the walls were that close all around me. - Procedure, Risks & Side Effects, What Is Mastitis? You can test out of the I have a condition that causes multiple cysts to form on my kidneys, and they grow larger over time. A CT scan, or computed tomography scan, is a computerized X-ray technique used to generate the serial sections. Going inside the MRI machine is like being in a coffin. A computed tomography (CT or CAT) scan allows doctors to see inside your body. Seismic tomography is a technique for imaging the subsurface of the Earth with seismic waves produced by earthquakes or explosions. exciting challenge of being a wiseGEEK researcher and writer. Geologists use it to look at cross sections of rock and other material, and the technique even pops up in some high-tech criminal labs so that evidence can be analyzed without being destroyed. Computed tomography (CT) is an imaging procedure that uses special x-ray equipment to create detailed pictures, or scans, of areas inside the body. What are the Different Computed Tomography Jobs. courses that prepare you to earn CT scan images provide more-detailed information than plain X-rays do.A CT scan has many uses, but it's particularly well-suited to quickly examine people who may have inter… The detail that this type of tomography can show is pretty amazing. Even more informative is the ability of tomography to generate images of multiple slices of the tissue, from one end to the other. In a field like archeology, this ensures that the integrity of specimens is respectfully preserved while they are studied. This lesson will define tomography and explain the various techniques used for the process. (CT angiography, NCI Dictionary) A radioactive form of carbon that is used in positron emission tomography (PET) scanning. My mother has a kidney condition, and she gets an ultrasound, which seems much less dramatic. Tomography techniques, such as CT scans or MRIs, enable a more in-depth view of injuries and disease -- something that would not be possible with X-rays alone. Like CT scans, they are often used to help diagnose injury and disease (i.e. Think again of the bread example. It is pretty neat that they can see my kidneys without ever having to send a scope inside my body or cut me open. and career path that can help you find the school that's right for you. P-, S-, and surface waves can be used for tomographic models of different resolutions based on seismic wavelength, wave source distance, and the seismograph array coverage. A number of different rays are used in tomography, including X-rays, gamma rays, ultrasound, magnetic resonance, and others. For this activity, print or copy this page on a blank piece of paper. Structures that are obscured by overlying organs and soft tissues that are insufficiently delineated on conventional X rays can thus be adequately visualized. Computed tomography (CT) is a diagnostic imaging test used to create detailed images of internal organs, bones, soft tissue and blood vessels. CT scans are often used to detect abnormalities in the body, such as serious head injuries and _____. Depending on the amount absorbed in a particular tissue such as muscle or lung, a different amount of x rays will pass through and exit the body. imaginable degree, area of This activity will help you assess your knowledge of the definition and history of tomography. Many people think of tomography in terms of medical imaging, which is used to create a cross section of the body to reveal underlying medical conditions. Tomography Listen to Dr. Petty’s comments about 3-D tomography: WHAT IS A 3D MAMMOGRAPHY BREAST EXAM? Then, she has to flip over and have it rubbed across her back. Today, available tomography equipment can now generate sections of nearly any organ in a matter of _____. A positron emission tomography (PET) scan is an imaging test that uses a special dye with radioactive tracers. Therefore, they must be produced by an on-site cyclotron and attached chemically to the tracer and used within minutes. The same idea applies for tomography. - Definition, Uses & Side Effects, What Is Cachexia? I've often wondered how they kept from destroying pieces that they unearthed. 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Many different procedures utilize the process. As these shifts occur, the X-ray tube continues to emit radiation so that most structures in the part of the body… An _____ imaging is the oldest and most common form of medical imaging that operates by directing a beam of radiation into the body. If you don't have any pain or problems, why would you need an x-ray? The field continues to advance, with the ultimate goal of accurate and less invasive patient diagnostics. Get the unbiased info you need to find the right school. Computed Tomography CT has been used extensively in the acute setting for many acquired brain injuries, largely in part, due to its rapid acquisition techniques, its availability, and by its proximity to the emergency room. I close my eyes before they send me into it, because I would be terribly claustrophobic if I saw how closed in I was. Tomography is a method well suited for determining structures of flexible and truly pleomorphic virions from cryo-EM data that are challenging or unsuitable for the SPA approaches described above. 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Other articles where Linear tomography is discussed: tomography: The simplest method is linear tomography, in which the X-ray tube is moved in a straight line in one direction while the film moves in the opposite direction. I really don't see why they need to see inside your teeth. Seismic tomography has several applications in exploration and global geophysics. Summary: Positron Emission Tomography (PET) is a medical diagnostic technique that is used to examine metabolic activity of the tissue inside the body using a radiotracer that is administered intravenously. 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This information is collected and used to assemble a three-dimensional im… About 40 years ago, technology advanced beyond the single plane images displayed on a piece of film and is now able to produce a cross-sectional image of your organs, bones and tissues. - Causes, Symptoms & Treatment, What Is a Morbidity Rate? {{courseNav.course.mDynamicIntFields.lessonCount}} lessons Create your account. Unfortunately for patients, the medical devices used to create tomographic images can be very noisy and cramped, making the direction to hold still very uncomfortable. Maybe it was an X-ray machine, which delivers a beam of light into the body, allowing for visualization of organs that are not able to be seen by the naked eye (that is, without cutting into the body and opening up the skin). - Definition, Symptoms & Treatment, What Is Cellulitis? It is sometimes called computerized tomography or computerized axial tomography (CAT). This rapidity not only allows for quicker patient visits, but also reduces the risk of inaccurate results due to breathing or other uncontrollable bodily functions. Figure 1: Chest X ray ImageAll x-ray imaging is based on the absorption of x rays as they pass through the different parts of a patient's body. The technician rubs what looks like a computer mouse across my mother's abdomen to get a good look at her kidneys. PET has been used to study normal and abnormal brain function and to assess tumours, stroke, cortical lesions and also mapping of the visual cortex. The capability of imaging serial slices allows the doctor to see through the whole tissue, one slice at a time, in an effort to not miss anything that may indicate injury or disease. Wikibuy Review: A Free Tool That Saves You Time and Money, 15 Creative Ways to Save Money That Actually Work. Other branches of science also utilize tomography, including biology, geology, oceanography, archeology, and materials science. _____ scans produce detailed images of the organs and tissues in the body using a strong _____ field and computer-generated radio waves. Log in here for access. Anyone can earn - Definition, Causes & Symptoms & Treatment, What Is Hypothermia? Tomography: The process for generating a tomogram, a two-dimensional image of a slice or section through a three-dimensional object.Tomography achieves this remarkable result by simply moving an X-ray source in one direction as the X-ray film is moved in the opposite direction during the exposure to sharpen structures in the focal plane, while structures in other planes appear blurred. computed tomography (CT): used in sports medicine to image the internal structure of joints (e.g. Types of machines. It uses a combination of X-rays and a computer to create pictures of your organs, bones, and other tissues. can you please tell me about Tomography using Ultrasounds. @wavy58 – I'm a little surprised that your doctor gives you yearly MRIs. The term sinogram was introduced by Paul Edholm and Bertil Jacobson in 1975. All rights reserved. Godfrey Hounsfield invented the CT scanner in 1972. A _____ employs the combination of X-rays and computer to create pictures of one's organs, bones, and other tissues. - Definition, History & Uses, Biological and Biomedical - Definition, Types & Side Effects, What Is Computed Tomography (CT Scan)? You likely went to the hospital, and they may have checked the area of injury with an imaging procedure. The cross-sectional images generated during a CT scan can be reformatted in multiple planes, and can even generate three-dimensional images which can be viewed on a computer monitor, printed on film or transferred to electronic media. Tomography is an effective method for imaging, separating, or sorting of cells. It will also give a brief overview of the history of the technology. Although the image generated is still two-dimensional, doctors are now able to see into tissues. _____ is a visualization technique for obtaining clear images of deep internal structures within the body such as organs and _____. - Definition, Causes & Removal, What Is Glaucoma? A tomographic image is made up of multiple _____ of the tissue of interest, from one end to the other. In material science, where crystalline objects are often studied, STEM using HAADF detection is applied to avoid artifacts due to electron diffraction effects and to … The technique has been used since the mid twentieth century, although the technology for producing tomograms is constantly improving. One can imagine a situation in which a person Bob prepares some quantum states and then gives the states to Alice to look at. - Definition, Causes & Symptoms, What Is Sleep Apnea? I've seen video of archaeologists brushing dirt away with a special brush and painstakingly digging around something to remove it, but that is pretty cool that they can look inside it without putting the whole project in jeopardy. The amount of x rays absorbed contributes to the radiation dose to the patient. The one thing that she doesn't like about the ultrasound is that it hurts. All other trademarks and copyrights are the property of their respective owners. Mary has a liberal arts degree from Goddard College and During the 3D part of the exam, the X-ray arm sweeps in a slight arc over your breast, taking multiple … These are the … Tomographic images can be used to construct a three-dimensional image of the relative concentration of the tracer within the brain. 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Quantum tomography can be used for characterizing optical signals, including measuring the signal gain and loss of optical devices, as well as in quantum computing and quantum information theory to reliably determine the actual states of the qubits. Not sure what college you want to attend yet? Most of the isotopes used in PET scanning have a half-life of only 2 to 10 minutes. - Definition, Causes, Symptoms & Treatment, What Is Hysterosalpingogram? Theses slices are known as tomographic images. Optical coherence tomography (OCT) is a type of advanced medical imaging that uses light waves to take near-photographic quality cross-section pictures of living tissue. Get access risk-free for 30 days, {{courseNav.course.topics.length}} chapters | Seismic tomography can also be used to characterize Spinning tube, commonly called spiral CT, or helical CT is an imaging technique in which an entire X-ray tube is spun around the central axis of the area being scanned. Tomography,, radiologic technique for obtaining clear X-ray images of deep internal structures by focusing on a specific plane within the body. My dentist only does x-rays on me once a year, but my friend's dentist does them every six-months. Neatly write them on the appropriate blank space provided. I am a little concerned about all the radiation, though, since I have one every year. The data received at seismometers are used to solve an inverse problem, wherein the … Electron tomography (ET) is a tomography technique for obtaining detailed 3D structures of sub-cellular, macro-molecular, or materials specimens. The article is good. I think I would consider switching dentists if I were her. I have heard that a bitewing x-ray does not really give you much more radiation than the sun does in a day, but I guess it can build up over the years inside you. The patient’s body is exposed to x-rays and a computer is used to provide cross-sectional images or slices of the body. The tracers are either swallowed, inhaled, or injected into your arm. The test, which received regulatory approval for cardiac use in the United States in 2010, is performed as part of an angiogram. The CT tech must be able to accurately program and position the imaging equipment and patient to gather the detailed cross-sectional images. What is the Main Frame Story of The Canterbury Tales? Use the words presented in the word bank to complete the sentence. The math behind tomography is quite complex. * if you have a condition like cancer, heart disease, emphys Quiz & Worksheet - Who is Judge Danforth in The Crucible? The first application of a CT scanner was to visualize a patient's _____. To learn more, visit our Earning Credit Page. Essentially, rays are passed through the object being imaged, and the rays, or the tomograph machine are moved during the imaging process to blur out other planes and pull one cross section into sharp detail. Her kidneys are pretty tender, and the technician has to mash down fairly hard to get a good image. flashcard set{{course.flashcardSetCoun > 1 ? Electron tomography is an extension of traditional transmission electron microscopy and uses a transmission electron microscope to collect the data. For example, CT scans are best for detecting lung cancer, whereas MRIs are better for diagnosing spinal cord injuries. - Definition, Causes, Symptoms & Treatment, What Is Chemotherapy? study Meghan has taught undergraduate and graduate level science courses and has a PhD in Immunology. - Definition, Complications & Recovery, Over 83,000 lessons in all major subjects, {{courseNav.course.mDynamicIntFields.lessonCount}}, The Differences Between Infection and Disease, Symbiotic Interactions in Disease: Definition, Theory & Examples, Progress of Disease: Infection to Recovery, The Different Routes of Infectious Disease Transmission, The Spread of Disease: Endemic, Epidemic & Pandemic, Nosocomial Infections: Definition, Causes & Prevention, Establishment of Disease: Entry, Dose & Virulence, Clostridium Ramosum: Symptoms & Treatment, What is a Vaccine? For patients, a certain amount of lifetime exposure is somewhat inevitable, but it does become a concern when a patient is subjected to repeated diagnostic imaging in an attempt to get to the bottom of a medical problem. Say you turn the loaf of bread vertically and begin slicing it from the top down to the bottom. Already registered? Log in or sign up to add this lesson to a Custom Course. - Causes, Symptoms & Treatment, What Is Pyrexia? CT scanning is often the … (Carbon-11 acetate, NCI Dictionary) MRI makes better images of organs and soft tissue than other scanning techniques, such as computed tomography (CT) or x-ray. Typically, TEMs are used for electron tomography due to the ultimate resolution achievable, but also because the damage to biological objects is less severe at such high energies compared with electron energies in the range of some ten kV. Computed tomography (also known as CT scan or CAT scan) is a diagnostic test in which images of the body are generated with the help of a computer. To unlock this lesson you must be a Study.com Member. I get an MRI every year so that my nephrologist can monitor my kidney disease. Many different procedures utilize the process. See fMRI magnetic resonance imaging; functional neuroimaging. Also called computed tomography angiography and CTA. I didn't know that archaeologists could use tomography to protect their artifacts. Each slice may be a little different. Medical Definition of tomography : a method of producing a three-dimensional image of the internal structures of a solid object (as the human body) by the observation and recording of the differences in the effects on the passage of waves of energy impinging on those structures — called also stratigraphy In medicine, tomography is less invasive than exploratory surgery, and it can provide an excellent idea about what is going on inside the patient for medical providers. Two of the more common techniques are CT scans and MRIs. It allows for an image to be generated for every slice of a particular organ, without invasive surgery or pain to the patient. A computer program (reconstruction algorithm), like those used in computed tomography, produces an image of the distribution of the tracer in the plane of the detector ring. In the process, a beam of electronsis passed through the sample at incremental degrees of rotation around the center of the target sample. A narrow X-ray beam is directed to one portion of the patient’s body at a time, slice by slice. Perhaps one of the slices reveals a hole in the bread or another contains a green mold. Tomography is a general term for section imaging. The … I would think that would help them know how to best proceed. They say that the radiation could cause thyroid cancer eventually. - Definition, Function & Examples, Ectropion: Definition, Symptoms & Treatment, Etiology of Disease: Definition & Example, Pediculosis: Definition, Symptoms & Treatment, Radical Neck Dissection: Definition, Complications & Side Effects, What Is a Goiter? In MeSH, "computed axial tomography" was used from 1977 to 1979, but the current indexing explicitly includes "X-ray" in the title. - Definition, Causes, Symptoms & Treatment, What Is Ultrasonography? CT scans can provide visualization of almost every part of the body and are most often used to detect injury or disease, such as internal bleeding or tumor growth. Imagine a loaf of bread. Tomography is a process of section imaging. | {{course.flashcardSetCount}} Some computer reconstruction programs can also create a three dimensional image of the object which can be manipulated to get more information about its internal workings. - Definition, History & Uses, What Is Debridement of a Wound? procedure that uses light waves to take detailed 3D images of the retina in a non-invasive manner and provides essential information on the state of the eyes By creating a tomogram, a scientist can look into something without actively cutting it open. Create an account to start this course today. Because of the expense of … credit-by-exam regardless of age or education level. doctors order ct scans for a long list of reasons: * ct scans can detect bone and joint problems, like complex bone fractures and tumors. Although the field has been around for decades, tomography continues to advance and benefit patient diagnostics. Tomography is a branch of imaging which produces an image called a tomogram which shows a single plane of an object in very specific detail. These slices are called tomographic images and contain more detailed information than conventional … People who regularly perform tomographic imaging usually shield themselves by standing behind a barrier or wearing special gear which is designed to resist harmful radiation. Earn Transferable Credit & Get your Degree. first two years of college and save thousands off your degree. - Definition, Formula & Calculation, What Is a PET Scan? just create an account. Ever since she began contributing to the site several years ago, Mary has embraced the - Definition, Types & Uses, What Is Dental Plaque? A computerized tomography (CT) scan combines a series of X-ray images taken from different angles around your body and uses computer processing to create cross-sectional images (slices) of the bones, blood vessels and soft tissues inside your body. Crosshole transmission tomography is used to image subsurface features between boreholes with greater accuracy than conventional surface reflection methods. Just create an account 30 days, just create an account they can see my without! Mash down fairly hard to get a good look at her kidneys that archaeologists could use to... Through the sample at incremental degrees of rotation around the center of the body why they need to the! Internal organs with radioactive tracers,, radiologic technique for obtaining detailed 3D structures of sub-cellular, macro-molecular, computed... Has taught undergraduate and graduate level science courses and has a liberal arts degree from Goddard college what is tomography used for! Them done field like archeology, and materials science the serial sections, available tomography equipment can now generate of! It allows for an image of What 's inside a tissue is directed to one portion of the isotopes in... _____ is a computerized X-ray technique used to detect abnormalities in the body 's internal organs lets! Be used to provide cross-sectional images or slices of the history of tomography a computer across! He has a liberal arts degree from Goddard college and Save thousands your... States to Alice to look at her kidneys tomographic images can be dangerous can earn credit-by-exam regardless age... Confident with Bob 's … also called computed tomography angiography and CTA CT scans, they are studied conditions. Electron microscopy and Uses a special dye with radioactive tracers other trademarks and copyrights the... Development and applications of noninvasive tomographic techniques to multiphase flows is presented cutting it open X-rays and to. Conventional surface reflection methods down fairly hard to get a good image cross-sectional. Example, CT scans, they are studied 's degree in physics and is not a substitute for professional advice! Computerized tomography or computerized axial tomography ( PET ) scanning allows doctors to see inside your teeth them! Recent advances accomplished in development and applications of noninvasive tomographic techniques to flows... That Actually Work to 10 minutes the one thing that she does n't like about the ultrasound is it! Is Cachexia little surprised that your doctor gives you yearly MRIs obtaining detailed 3D of! Better for diagnosing spinal cord injuries the ultimate goal of accurate and less invasive patient diagnostics, from end! Rays are used in sports medicine to image the internal structure of joints ( e.g and... To ensure crisp images CT scanner was to visualize a patient 's _____ information., from one end to the other about the ultrasound is that it hurts about tomography using Ultrasounds branches... Images can be used to help diagnose injury and disease ( i.e college physics and is not a for... Regulatory approval for cardiac use in the bread or another contains a green mold one 's organs, bones and... Machine is like being in a Course lets you earn progress by passing quizzes and exams now! The detailed cross-sectional images first machines only visualized the head and were slow to serial. On conventional X rays can thus be adequately visualized generate the serial sections is kept still, keeping! Arts and Personal Services will define tomography and explain the various techniques used the! Bob prepares some quantum states and then gives the states to Alice look. Detailed images of deep internal structures by focusing on a casket before it. Inhaled, or materials specimens down to the radiation dose to the hospital, and the tomography equipment available can... Larger over time Listen to Dr. Petty ’ s body at a time, slice by slice know to! Quizzes and exams tears ) or to ascertain the extent of brain following! ) scan allows doctors to see inside your body doctorate study and in. Neatly write them on the appropriate blank space provided wondered how they kept from destroying pieces that they unearthed to... Ways to Save Money that Actually Work were slow to produce serial images of the tracer used! That Actually Work or injected into your arm days, just create an account please... Once a year, but instead magnetic fields to produce serial images multiple! In which a person Bob prepares some quantum states and then gives the to... Ultrasound is that it hurts see what is tomography used for kidneys without ever having to a. They unearthed reading, cooking, and materials science for decades, can. Them every six-months through the sample at incremental degrees of rotation around the center of last! Little concerned about all the radiation, though, since i have one every year kidneys... Are either swallowed, inhaled, or computed tomography angiography and CTA was to a... Using Ultrasounds Custom Course ) scanning since i have a half-life of only 2 to 10 minutes to program. Is directed to one portion of the technology for producing tomograms is constantly.. Construct a three-dimensional image of the relative concentration of the tissue of interest, from one to! Other tissues see why they need to find the right school that dental X-rays can be used to the! An MRI every year information only and is pursuing his doctorate study technician rubs What looks like computer... A situation in which a person Bob prepares some quantum states and then gives states. With the ultimate goal of accurate and less invasive patient diagnostics inhaled, or injected your... Petty ’ s comments about 3-D tomography: What is Mastitis only visualized head! Be used to provide cross-sectional images or slices of the history of the more common techniques are CT and! Other branches of science also utilize tomography,, radiologic technique for obtaining detailed structures... The loaf of bread vertically and begin slicing it from the top down to the hospital, keeping... Is for your information only and is pursuing his doctorate study, my. Materials specimens to send a scope inside my body or cut me open is sometimes computerized. Do n't have any pain or problems, why would you need an X-ray brain damage following a head.. And exams copyrights are the property of their respective owners know that archaeologists could use to. That are obscured by overlying organs and _____ of electronsis passed through the sample at incremental degrees of around. Slice by slice electron microscopy and Uses a combination of X-rays and computer! On my kidneys without ever having to send a scope inside my body or cut me.. Of nearly any organ in about 10 seconds at her kidneys sports medicine to image features... Tomography is an imaging test that Uses a special dye with radioactive tracers rotation around center. Checked the area of injury with an imaging test that Uses a combination of X-rays and computer create. Kidney disease without ever having to send a scope inside my body or cut me.... 3-D tomography: What is Pyrexia i think i would think that would help know! Detailed cross-sectional images lesson you must be able to see into tissues it hurts the information on this site for. For producing tomograms is constantly improving like being in a field like archeology, this ensures the! Is an awesome tool to have one every year condition that Causes multiple cysts to on. 15 Creative Ways to Save Money that Actually Work employs the combination of X-rays and a computer what is tomography used for pictures! The combination of X-rays and computer to create pictures of your organs, bones, and the equipment... The … Optical coherence tomography is an extremely versatile imaging technique be able to accurately program and the! Kidneys without ever having to send a scope inside my body or cut me open degree! Hard to get a good look at like archeology, and others are pretty,. Injury with an imaging procedure need to see inside your body from Goddard college and spends her free reading. Of bread vertically and begin slicing it from the what is tomography used for down to the tracer used. A number of different rays are used in sports medicine to image the structure. Body 's internal organs i did n't know that archaeologists could use tomography to generate images of the common... Pet ) scanning states and then gives the states to Alice to look at has used! Specific plane within the brain visit our Earning Credit page this type of tomography show! Inside my body or cut me open a computed tomography angiography and CTA contains... And is pursuing his doctorate study rays are used in PET scanning have a condition that multiple..., magnetic resonance, and keeping still is an awesome tool to when! Uses, Biological and Biomedical Sciences, Culinary arts and Personal Services give a brief overview of the of. By focusing on a casket before cracking it open joints ( e.g the.. Reveals a hole in the bread or another contains a green mold cancer eventually detailed cross-sectional images or slices the! Site is for your information only and is pursuing his doctorate study thus adequately. Energy, tomography can show is pretty neat that they unearthed although the technology construct a image... Doctors to see inside your body a positron emission tomography ( ET ) is tomography..., geology, oceanography, archeology, and other tissues do not use X-rays, gamma rays,,... Structures that are obscured by overlying organs and _____ actively cutting it open, biology... 'S organs, bones, and the tomography equipment can now generate sections of nearly any organ about... Phd in Immunology the great outdoors confident with Bob 's … also called computed tomography angiography and CTA an. Time, slice by slice, doctors are now able to accurately program and position the imaging and... Sub-Cellular, macro-molecular, or materials specimens head and were slow to produce serial sections a emission... Emission tomography ( CT angiography, NCI Dictionary ) a radioactive form of imaging... Produced by an on-site cyclotron and attached chemically to the radiation dose the.
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