What Parents Should Know about the Safety of
... risks agree that we should act as if even low doses of radiation may potentially cause harm and should always try to minimize radiation exposure. This is particularly important in children as they are at an approximately 3 to 5 times higher radiation-induced cancer mortality risk than adults. This i ...
... risks agree that we should act as if even low doses of radiation may potentially cause harm and should always try to minimize radiation exposure. This is particularly important in children as they are at an approximately 3 to 5 times higher radiation-induced cancer mortality risk than adults. This i ...
Lowering Radiation Dose in CT Imaging
... There is a quadratic relationship between kVp and radiation dose. Therefore, by minimizing the kVp while maintaining the current (mAs) so that there are sufficient photons to maintain image quality, radiation dose can be substantially reduced (Figure 1). This is especially beneficial to pediatric pa ...
... There is a quadratic relationship between kVp and radiation dose. Therefore, by minimizing the kVp while maintaining the current (mAs) so that there are sufficient photons to maintain image quality, radiation dose can be substantially reduced (Figure 1). This is especially beneficial to pediatric pa ...
Establishing national diagnostic reference levels for digital
... [4] NHS Breast Screening Programme Publication Number 54, UK, February 2003 [5] Ionising Radiation (Medical Exposure) Regulations, (SI 2000 No 1059), UK:HMSO, 2000 [6] Dosimetry Working Party of the Institute of Physical Sciences in Medicine. National protocol for patient dose measurements in diagno ...
... [4] NHS Breast Screening Programme Publication Number 54, UK, February 2003 [5] Ionising Radiation (Medical Exposure) Regulations, (SI 2000 No 1059), UK:HMSO, 2000 [6] Dosimetry Working Party of the Institute of Physical Sciences in Medicine. National protocol for patient dose measurements in diagno ...
Radiation Safety and Physics
... nausea, anorexia and potential damage to the bone marrow. As the dose increases, the nausea, vomiting, diarrhea and hematopoietic damage become worse, along with acute hair loss and hemorrhaging. If the Fukushima workers received whole body doses of 2-3 Sv, they would have certainly had significant ...
... nausea, anorexia and potential damage to the bone marrow. As the dose increases, the nausea, vomiting, diarrhea and hematopoietic damage become worse, along with acute hair loss and hemorrhaging. If the Fukushima workers received whole body doses of 2-3 Sv, they would have certainly had significant ...
Radiation Safety - 7
... inert gas inside the tube. The radiation enters the tube ionizing the gas thus creating a current flow. The amount of radiation is proportional to the current flow. ...
... inert gas inside the tube. The radiation enters the tube ionizing the gas thus creating a current flow. The amount of radiation is proportional to the current flow. ...
master`s programme in medical physics
... The major outcome of the academic programme would be to provide students with a thorough grounding in the physiological basis, analytical methods and fundamental aspects of medical physics and instil an att ...
... The major outcome of the academic programme would be to provide students with a thorough grounding in the physiological basis, analytical methods and fundamental aspects of medical physics and instil an att ...
AAPM Licensure Update
... – “CT X-ray irradiation of body part other than that intended by the ordering physician or a radiologist, and if specified dose values are exceeded. – Examples: • Scan head only when abdominal scan requested • Wrong patient ...
... – “CT X-ray irradiation of body part other than that intended by the ordering physician or a radiologist, and if specified dose values are exceeded. – Examples: • Scan head only when abdominal scan requested • Wrong patient ...
9852 MS-Word - Maine Legislature
... 13. Radiologic technology. "Radiologic technology" means the use of a radioactive substance or equipment emitting ionizing radiation on human beings for diagnostic or therapeutic purposes. [ 1983, c. 524, (NEW) .] 14. Radiological physicist. "Radiological physicist" means a person who has successful ...
... 13. Radiologic technology. "Radiologic technology" means the use of a radioactive substance or equipment emitting ionizing radiation on human beings for diagnostic or therapeutic purposes. [ 1983, c. 524, (NEW) .] 14. Radiological physicist. "Radiological physicist" means a person who has successful ...
MASTER`S PROGRAMME IN MEDICAL PHYSICS
... o Charts /tables, box-plot, measures of central tendency, measures of dispersion and their 'critical' use. Examples and exercises with R in the field of bio-medical. o Elements of probability theory: definitions and problems, the conditional probability. o Diagnostic tests and ROC curve ...
... o Charts /tables, box-plot, measures of central tendency, measures of dispersion and their 'critical' use. Examples and exercises with R in the field of bio-medical. o Elements of probability theory: definitions and problems, the conditional probability. o Diagnostic tests and ROC curve ...
Basics of nuclear physics
... Radiation effects can be measured or estimated Absorbed dose can be assessed from exposure Ionization is biologically harmful We are most irradiated from natural sources ...
... Radiation effects can be measured or estimated Absorbed dose can be assessed from exposure Ionization is biologically harmful We are most irradiated from natural sources ...
Radiation Dose Reduction in Pediatric CT
... • To become familiar with resources available to help implementing radiation dose reduction. • To become familiar with the various modifications that can be done to reduce neuroradiological CT examination radiation doses in pediatrics (on both older and newer generation scanners). ...
... • To become familiar with resources available to help implementing radiation dose reduction. • To become familiar with the various modifications that can be done to reduce neuroradiological CT examination radiation doses in pediatrics (on both older and newer generation scanners). ...
Modern Radiation Therapy for Hodgkin Lymphoma: Field and Dose
... in the delivery of RT to maintain high rates of long-term local control while minimizing radiation exposure to surrounding normal tissues. Furthermore, it is recognized that most recurrences in patients treated for HL occur in sites of previous involvement, and that RT reduces local recurrence. Adva ...
... in the delivery of RT to maintain high rates of long-term local control while minimizing radiation exposure to surrounding normal tissues. Furthermore, it is recognized that most recurrences in patients treated for HL occur in sites of previous involvement, and that RT reduces local recurrence. Adva ...
Learning objectives
... Cincinnati Children’s Hospital Medical Center 2 The Hospital for Sick Children, Toronto ...
... Cincinnati Children’s Hospital Medical Center 2 The Hospital for Sick Children, Toronto ...
Radiation therapy
Radiation therapy or radiotherapy, often abbreviated RT, RTx, or XRT, is therapy using ionizing radiation, generally as part of cancer treatment to control or kill malignant cells. Radiation therapy may be curative in a number of types of cancer if they are localized to one area of the body. It may also be used as part of adjuvant therapy, to prevent tumor recurrence after surgery to remove a primary malignant tumor (for example, early stages of breast cancer). Radiation therapy is synergistic with chemotherapy, and has been used before, during, and after chemotherapy in susceptible cancers. The subspecialty of oncology that focuses on radiotherapy is called radiation oncology.Radiation therapy is commonly applied to the cancerous tumor because of its ability to control cell growth. Ionizing radiation works by damaging the DNA of cancerous tissue leading to cellular death. To spare normal tissues (such as skin or organs which radiation must pass through to treat the tumor), shaped radiation beams are aimed from several angles of exposure to intersect at the tumor, providing a much larger absorbed dose there than in the surrounding, healthy tissue. Besides the tumour itself, the radiation fields may also include the draining lymph nodes if they are clinically or radiologically involved with tumor, or if there is thought to be a risk of subclinical malignant spread. It is necessary to include a margin of normal tissue around the tumor to allow for uncertainties in daily set-up and internal tumor motion. These uncertainties can be caused by internal movement (for example, respiration and bladder filling) and movement of external skin marks relative to the tumor position.Radiation oncology is the medical specialty concerned with prescribing radiation, and is distinct from radiology, the use of radiation in medical imaging and diagnosis. Radiation may be prescribed by a radiation oncologist with intent to cure (""curative"") or for adjuvant therapy. It may also be used as palliative treatment (where cure is not possible and the aim is for local disease control or symptomatic relief) or as therapeutic treatment (where the therapy has survival benefit and it can be curative). It is also common to combine radiation therapy with surgery, chemotherapy, hormone therapy, immunotherapy or some mixture of the four. Most common cancer types can be treated with radiation therapy in some way.The precise treatment intent (curative, adjuvant, neoadjuvant, therapeutic, or palliative) will depend on the tumor type, location, and stage, as well as the general health of the patient. Total body irradiation (TBI) is a radiation therapy technique used to prepare the body to receive a bone marrow transplant. Brachytherapy, in which a radiation source is placed inside or next to the area requiring treatment, is another form of radiation therapy that minimizes exposure to healthy tissue during procedures to treat cancers of the breast, prostate and other organs.Radiation therapy has several applications in non-malignant conditions, such as the treatment of trigeminal neuralgia, acoustic neuromas, severe thyroid eye disease, pterygium, pigmented villonodular synovitis, and prevention of keloid scar growth, vascular restenosis, and heterotopic ossification. The use of radiation therapy in non-malignant conditions is limited partly by worries about the risk of radiation-induced cancers.