A brief introduction about the Neuro-cognitive technique Positron Emission Tomography widely used in neurolinguistics and for medical purposes like tumor detection etc.
What is a Pet Scan : Nuclear 3-D imaging test that uses a radioactive substance called a tracer to look for disease in the body.
Shows how organs and tissues are working at a molecular and cellular level. Scan is non-invasive, but does involve exposure to ionizing radiation.
Best known for its role in detecting cancer imaging.
A small amount of a radioactive sugar molecule, 18 fluoro-2-deoxyglucose (FDG), is injected into the bloodstream (can also be inhaled as gas or swallowed in pill form).
A PET Scan is used to detect and generate images that indicate areas of high FDG uptake.
Many cancers require more energy than normal cells, and the FDG tracer accumulates in these cells.
This allows cancers to be seen on the Pet images as hot spots.
Brief explanation of what is PET, the main components for a PET system along with their basic functions. The principle behind PET inclusive of positron emission and emission detection. Acquisition and reconstruction of the collected data to produce the final image. Finally the pros and cons of Positron emission tomography.
Computed tomography (CT scan) is a medical imaging procedure that uses computer-processed X-rays to produce tomographic images or 'slices' of specific areas of the body. These cross-sectional images are used for diagnostic and therapeutic purposes in various medical disciplines.
What is a Pet Scan : Nuclear 3-D imaging test that uses a radioactive substance called a tracer to look for disease in the body.
Shows how organs and tissues are working at a molecular and cellular level. Scan is non-invasive, but does involve exposure to ionizing radiation.
Best known for its role in detecting cancer imaging.
A small amount of a radioactive sugar molecule, 18 fluoro-2-deoxyglucose (FDG), is injected into the bloodstream (can also be inhaled as gas or swallowed in pill form).
A PET Scan is used to detect and generate images that indicate areas of high FDG uptake.
Many cancers require more energy than normal cells, and the FDG tracer accumulates in these cells.
This allows cancers to be seen on the Pet images as hot spots.
Brief explanation of what is PET, the main components for a PET system along with their basic functions. The principle behind PET inclusive of positron emission and emission detection. Acquisition and reconstruction of the collected data to produce the final image. Finally the pros and cons of Positron emission tomography.
Computed tomography (CT scan) is a medical imaging procedure that uses computer-processed X-rays to produce tomographic images or 'slices' of specific areas of the body. These cross-sectional images are used for diagnostic and therapeutic purposes in various medical disciplines.
brief but informative knowledge about what basically PET is and what is the phenomenon behind this machine ... easy to understand as well as presenting during lectures and in classes . share it
Positron emission tomography pet scan and its applicationsYashawant Yadav
Slides contains physic about the PET scan that is positron emission tomography , its principle , detector configuration types , clinical application of PET Scan and advancement with CT and MRI
It includes history, components, principle, it's benefits and risk in very concise way and point to point information. Points are in bullet and bold form, so you can easy grab it.
brief but informative knowledge about what basically PET is and what is the phenomenon behind this machine ... easy to understand as well as presenting during lectures and in classes . share it
Positron emission tomography pet scan and its applicationsYashawant Yadav
Slides contains physic about the PET scan that is positron emission tomography , its principle , detector configuration types , clinical application of PET Scan and advancement with CT and MRI
It includes history, components, principle, it's benefits and risk in very concise way and point to point information. Points are in bullet and bold form, so you can easy grab it.
What is pet scan, it's principle, components of pet, pet working , cases of pet , pet clinical applications PET/CT, Disadvantages and accuracy.#PETSCAN
Synthetic Fiber Construction in lab .pptxPavel ( NSTU)
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What is the purpose of the Sabbath Law in the Torah. It is interesting to compare how the context of the law shifts from Exodus to Deuteronomy. Who gets to rest, and why?
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2024.06.01 Introducing a competency framework for languag learning materials ...Sandy Millin
http://sandymillin.wordpress.com/iateflwebinar2024
Published classroom materials form the basis of syllabuses, drive teacher professional development, and have a potentially huge influence on learners, teachers and education systems. All teachers also create their own materials, whether a few sentences on a blackboard, a highly-structured fully-realised online course, or anything in between. Despite this, the knowledge and skills needed to create effective language learning materials are rarely part of teacher training, and are mostly learnt by trial and error.
Knowledge and skills frameworks, generally called competency frameworks, for ELT teachers, trainers and managers have existed for a few years now. However, until I created one for my MA dissertation, there wasn’t one drawing together what we need to know and do to be able to effectively produce language learning materials.
This webinar will introduce you to my framework, highlighting the key competencies I identified from my research. It will also show how anybody involved in language teaching (any language, not just English!), teacher training, managing schools or developing language learning materials can benefit from using the framework.
Unit 8 - Information and Communication Technology (Paper I).pdfThiyagu K
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We all have good and bad thoughts from time to time and situation to situation. We are bombarded daily with spiraling thoughts(both negative and positive) creating all-consuming feel , making us difficult to manage with associated suffering. Good thoughts are like our Mob Signal (Positive thought) amidst noise(negative thought) in the atmosphere. Negative thoughts like noise outweigh positive thoughts. These thoughts often create unwanted confusion, trouble, stress and frustration in our mind as well as chaos in our physical world. Negative thoughts are also known as “distorted thinking”.
3. • Positron Emission Tomography (PET) is a nuclear imaging technique
that produces a 3-D image of functional processes in the body by
detecting the radiation emitted by photons .
• The system detects pairs of gamma rays emitted indirectly by
positron emitting radionuclide (tracer), which was previously
injected in body on a biologically active molecule,
• 3-D images of tracer concentration within the body are then
constructed by computer analysis.
5. Working
• Injection of Short lived Radioactive Isotope in body.
most commonly used is FDG (fluoro-2-
deoxyglucose).
• Wait till tracer gets accumulated in tissues of interests.
• Subject is placed in the imaging scanner
• Tissue concentration is recorded with time.
• As isotope decays in body, it releases a positron in body.
On interaction with an electron, it produces a pair of
photons.
8. Applications of PET
• PET is used in following areas.
• Neuroimaging
• Clinical oncology (medical imaging of tumors).
• Musculo-skeletal imaging
• Cardiology
• Pharmacology
• Neuropsychology
9. Neuroimaging
• The greatest benefit of PET is that it can show blood and
oxygen flow and glucose metabolism to different tissues of
working brain. These measurements help in understanding
amount of brain activity and allow us to know more about
how brain works.
• PET is superior to all other imaging techniques because of its
resolution and speed of completion.
12. Brain Diseases and PET
• PET scanning is also used for diagnosis of brain diseases most
notably because all the brain diseases like tumors, strokes and
neuron damaging diseases which cause Dementia (like
Alzheimer’s disease) all cause great change in brain
metabolism which causes easily detectable changes in PET
scans.
• PET scan is most commonly used in case of certain dementias
like( Alzheimer’s Disease and Pick’s Disease) where the early
damage is not detected by using CT and MRI scans.
14. Pick’s Disease
PET scan of patient with Pick’s Disease showing Decreased Metabolism in
frontal lobe. (Activity is represented in black)
15. Neuropsychology
• PET is used in neuropsychology to examine links between
specific psychological processes or disorders and brain activity.
• Psychiatry:
• To cure mental disorders, patients are given some drugs that
selectively bind to Neuroreceptors of interest. To check the
states of these receptors , we need to use to PET SCANS.
16. Oncology
• Most widely used Application of PET
• Tracer used is FDG-18.
• Highly accurate as tumor cells consume lot of glucose.
• And Tracer is a glucose analog.
• Also, tracer is bound in tumor cell once it got there until it
decays.
• Thereby, giving more accurate results.
19. Musculo –Skeletal Imagaing
• One of the main advantage using PET is that it can also
provide muscle activation data about deeper lying
muscles as compared to other muscle studying
techniques.
But…
• there is an disadvantage also as provides no timing
information about muscle activation because it has to be
measured after the exercise is complete.
20. Cardiology and Pharmacology
• In Cardiology, PET helps us to detect patients at the risk of
stroke.
• In pre-clinical trials, it is possible to radiolabel a new drug and
test it on animals. The drug accumulates in tissues of interest
and hence, providing information about the effectiveness of
drug.
21. Summary
• PET scan is very good imaging technique used in both medical
oncology and brain imaging.
• This scan is most effective due to its lesser time of completion
and better resolution and also less exposing to radioactivity
than CT scan, high accuracy in detecting brain diseases (at very
early stage too )and prediction of various strokes.
• But its high cost is a major drawback.
• In future, if we are able to reduce its cost, than this technique
can of great use to us.