The document provides an overview of radiation therapy presented by Joe Meadows to Hope Lodge. It defines ionizing and non-ionizing radiation and their sources. It discusses the basic mechanisms of radiobiology, contemporary radiation therapy technologies like IMRT and IGRT, and developing technologies like proton beam therapy. Meadows notes challenges in treating cancers like lung cancer and the high costs of emerging technologies.
This presentation was recently given by Dr. Brett Heilbron on the CanadianEMR - Technology in Clinical Practice Cruise Conference - April 2013. Learning objectives for the session were to understand the risks associated with ionizing radiation, identify ways to optimize patient benefit and minimize risk and to discuss some of the controversies around medical imaging radiation. The presentation focuses on the use of a common technology in clinical settings - medical diagnostic imaging - and provides some guidance regarding this controversial topic.
Medical world knows very little of radiation oncology. This presentation will make you updated with latest technology, innovation and principles of radiation oncology.
This presentation will clear doubts and misconception of many medical practitioners.
The surprising dangers of CT scans and X-rays
Patients are often exposed to cancer-causing radiation for little medical reason, a Consumer Reports investigation finds
This presentation was recently given by Dr. Brett Heilbron on the CanadianEMR - Technology in Clinical Practice Cruise Conference - April 2013. Learning objectives for the session were to understand the risks associated with ionizing radiation, identify ways to optimize patient benefit and minimize risk and to discuss some of the controversies around medical imaging radiation. The presentation focuses on the use of a common technology in clinical settings - medical diagnostic imaging - and provides some guidance regarding this controversial topic.
Medical world knows very little of radiation oncology. This presentation will make you updated with latest technology, innovation and principles of radiation oncology.
This presentation will clear doubts and misconception of many medical practitioners.
The surprising dangers of CT scans and X-rays
Patients are often exposed to cancer-causing radiation for little medical reason, a Consumer Reports investigation finds
Future of radiation protection regulations presentationMohan Doss
This is the presentation I made at the 2015 Health Physics Society Annual Meeting, in the Special Session called
"Health Risks from Low Doses and Low Dose-Rates of Ionizing Radiation" on July 14, 2015.
Radiation therapy patient treatment planning & post treatment care/ Labial or...Indian dental academy
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Do medical professionals overly rely on radiation in medical treatments?
Many people are concerned that medical professionals rely too heavily on radiation particularly for diagnostic scans such as CT, X-rays, and PET scans. If you’re worried about cancer then you too are probably going to be concerned about the continuing over-use of scans.
Future of radiation protection regulations presentationMohan Doss
This is the presentation I made at the 2015 Health Physics Society Annual Meeting, in the Special Session called
"Health Risks from Low Doses and Low Dose-Rates of Ionizing Radiation" on July 14, 2015.
Radiation therapy patient treatment planning & post treatment care/ Labial or...Indian dental academy
Indian Dental Academy: will be one of the most relevant and exciting training center with best faculty and flexible training programs for dental professionals who wish to advance in their dental practice,Offers certified courses in Dental implants,Orthodontics,Endodontics,Cosmetic Dentistry, Prosthetic Dentistry, Periodontics and General Dentistry.
Do medical professionals overly rely on radiation in medical treatments?
Many people are concerned that medical professionals rely too heavily on radiation particularly for diagnostic scans such as CT, X-rays, and PET scans. If you’re worried about cancer then you too are probably going to be concerned about the continuing over-use of scans.
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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.
Similar to Radiation Therapy 101.5"-ONS Talk Jan2009 (13)
1. Joe L. Meadows, M.S. DABMP Medical Physicist The Lacks Cancer Center Saint Mary’s Health Care Grand Rapids, MI Joe Meadows M.S. ONS Jan.2009 Radiation Therapy 101.5 Jan 20, 2009 Hope Lodge
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3. Trust Me I am an Expert! “ An expert is a man who has made all the mistakes which can be made in a very narrow field” Niels Bohr DISCLAMER I am NOT: Physician,Radiobiologist,Pathologist,Epidemiologist or any other “ologist”. I am only a Physicist!
13. X-ray or - ray? http://hko.gov rays and x-rays are similar, the major difference is their origins. rays are emitted from the nuclei of unstable atoms during radioactive decay, while x-rays are from the electron cloud as the result of electron excitation.
14. Where Does All It Come From? http://hko.gov Percentage of different types of radiation dose in daily life
36. 2007 Estimated US Cancer Deaths ONS=Other nervous system. Source: American Cancer Society, 2007. Men 289,550 Women 270,100 26% Lung & bronchus 15% Breast 10% Colon & rectum 6% Pancreas 6% Ovary 4% Leukemia 3% Non-Hodgkin lymphoma 3% Uterine corpus 2% Brain/ONS 2% Liver & intrahepatic bile duct 23% All other sites Lung & bronchus 31% Prostate 9% Colon & rectum 9% Pancreas 6% Leukemia 4% Liver & intrahepatic 4% bile duct Esophagus 4% Urinary bladder 3% Non-Hodgkin 3% lymphoma Kidney 3% All other sites 24%
37. 2007 Estimated US Cancer Cases *Excludes basal and squamous cell skin cancers and in situ carcinomas except urinary bladder. Source: American Cancer Society, 2007. Men 766,860 Women 678,060 26% Breast 15% Lung & bronchus 11% Colon & rectum 6% Uterine corpus 4% Non-Hodgkin lymphoma 4% Melanoma of skin 4% Thyroid 3% Ovary 3% Kidney 3% Leukemia 21% All Other Sites Prostate 29% Lung & bronchus 15% Colon & rectum 10% Urinary bladder 7% Non-Hodgkin 4% lymphoma Melanoma of skin 4% Kidney 4% Leukemia 3% Oral cavity 3% Pancreas 2% All Other Sites 19%
38. Source: American Cancer Society, 2007. Five-year Relative Survival (%) During Three Time Periods by Cancer Site Better GOOD BAD!! WHY? Site 1975-1977 1984-1986 1996-2002 All sites 50 53 66 Breast (female) 75 79 89 Colon 51 59 65 Leukemia 35 42 49 Lung and bronchus 13 13 16 Melanoma 82 86 92 Non-Hodgkin lymphoma 48 53 63 Ovary 37 40 45 Pancreas 2 3 5 Prostate 69 76 100 Rectum 49 57 66 Urinary bladder 73 78 82
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42. Why Is Lung Cancer Still BAD ? Ask 10 “experts”, get TEN answers!
43. PET/CT- Metabolic Targeting Functional imaging obtained by PET, which depicts the Spatial distribution of metabolic or biochemical activity in the body which can be precisely aligned with anatomic imaging obtained by CT scanning.
44. Why Is PET Helpful? Where is the tumor? When the CT alone is used, often time for lung cancer it is difficult (at best) to discern tumor from collapsed lung.
47. Some Treatment Techniques How we have been treating prostate cancer for the past 25 years using 4 static beams. All the intervening tissues get dosed as well! Today, you can have your treatment on a device that uses THOUSANDS of beams directed at the tumor while missing most of the normal anatomy!
49. Why Is IGRT Important? Uncorrected treatment Corrected Treatment Note : Large tumor cold spot if treatment is not corrected. If you can’t see what you are doing clearly, you may not get the desired outcome!
51. What to Do If Feel Lost? If all of this is starting to make your head spin, I have a recommendation for all the Medical Device companies to add this menu to their product
52. What Is Next- Protons? Due to their relatively enormous mass, protons scatter less easily whereby minimizing lateral damage to surrounding tissue. Furthermore, the dosage to tissue is maximum just over the last few millimeters of the particle’s range; this maximum is called the Bragg Peak . This depth can be optimized to match the tumor depth by varying the proton energy. In theory it is possible to focus the cell damage due to the proton beam at the very depth in the tissues where the tumor is situated; Still River Tomo Proton DWA Mobile Proton Accelerator That’s What I’m Talking About!
53. What Is Next- Protons? Example : Two Field approach in the head and neck region showing resulting entrance and tumor doses How many proton beam therapy centers are enough? The United States now has 5 in operation with at least 10 more on the horizon. The price tag is mind-boggling, upward of $200 million for a single PBT facility. To justify this huge capital investment, a proton center needs a strategic model, in other words, a high-volume disease, such as prostate cancer. Table 1. Proton facilities operating in the US • The James M. Slater, MD, Proton Treatment and Research Center - Loma Linda, California • Midwest Proton Radiotherapy Institute at Indiana University - Bloomington, Indiana • Francis H. Burr Proton Therapy Center - Massachusetts General Hospital-Harvard, Boston • M.D. Anderson Proton Therapy Center - Houston • University of Florida Proton Therapy Institute - Jacksonville, Florida Selected proton facilities under development in the US • The Roberts Proton Therapy Center at University of Pennsylvania Health System, Philadelphia • Hampton University, Hampton, Virginia • Seattle Cancer Care Alliance • The Oklahoma ProCure Treatment Center, Oklahoma City • Siteman Cancer Center – St. Louis, Missouri. • The Northern Illinois Proton Treatment and Research Center -- Chicago The big advantage of CPT, however, is that as these charged particles traverse through tissue they initially deposit energy at a low LET, followed by a sharp increase to high-LET deposition at the Bragg peak. The tissue depth of this peak can be tailored to each treatment.