Ervin B. Podgoršak, Recipient of the Coolidge
... held in Orlando, Florida July 30 – August 4, 2006. The Coolidge Award is the AAPM’s highest honor, presented during the annual AAPM meeting to a medical physicist who has exhibited a distinguished career in medical physics in three areas: research, teaching and service, and who has exerted a signifi ...
... held in Orlando, Florida July 30 – August 4, 2006. The Coolidge Award is the AAPM’s highest honor, presented during the annual AAPM meeting to a medical physicist who has exhibited a distinguished career in medical physics in three areas: research, teaching and service, and who has exerted a signifi ...
Technical Paper III - Radiodiagnosis and Imaging Science Technology
... 8. Which of the following is correct regarding deterministic effects of radiation? a) It has a minimum threshold below which it does not occur b) The severity of the effect decreases with dose c) The probability of the effect occurring increases with dose d) Breast cancer is a type of deterministic ...
... 8. Which of the following is correct regarding deterministic effects of radiation? a) It has a minimum threshold below which it does not occur b) The severity of the effect decreases with dose c) The probability of the effect occurring increases with dose d) Breast cancer is a type of deterministic ...
Best Practices in Computerized Tomography
... the SMRMC Web site and patients are encouraged to visit RadiologyInfo™ online. RadiologyInfo™ is a patient education Web site developed and maintained through the collaboration of the ACR and the Radiologic Society of North America (RSNA) for patients to learn more about CT or any other type of diag ...
... the SMRMC Web site and patients are encouraged to visit RadiologyInfo™ online. RadiologyInfo™ is a patient education Web site developed and maintained through the collaboration of the ACR and the Radiologic Society of North America (RSNA) for patients to learn more about CT or any other type of diag ...
Conceptual Amendment to SB 219 General 1
... 15. A person who does not meet the requirements of item 2 may operate a source of ionizing radiation for the purposes of performing radiation therapy or radiologic imaging under the direct supervision of a physician, chiropractor or podiatrist or person who holds a full certificate if the person is ...
... 15. A person who does not meet the requirements of item 2 may operate a source of ionizing radiation for the purposes of performing radiation therapy or radiologic imaging under the direct supervision of a physician, chiropractor or podiatrist or person who holds a full certificate if the person is ...
Diversity of Cortical and Subcortical MS Pathology/Lesions
... improvements in sensitivity and spatial resolution that have accrued with increasing field strengths, up to the current clinical standard of 3T, have provided corresponding improvements in the conspicuity of MS lesions [2-4], and with the recent introduction of 7T human clinical scanners, there is r ...
... improvements in sensitivity and spatial resolution that have accrued with increasing field strengths, up to the current clinical standard of 3T, have provided corresponding improvements in the conspicuity of MS lesions [2-4], and with the recent introduction of 7T human clinical scanners, there is r ...
Radiography of the abdomen - ESR::Patientinfo:PI
... The procedure is performed with your upper body undressed. You may be given a gown to wear. Note that all foreign objects such as piercings must be removed before the procedure to guarantee optimum image assessment. Metals, for example, make the evaluation of the image harder or even impossible. You ...
... The procedure is performed with your upper body undressed. You may be given a gown to wear. Note that all foreign objects such as piercings must be removed before the procedure to guarantee optimum image assessment. Metals, for example, make the evaluation of the image harder or even impossible. You ...
Clinical Dose Optimization Service™
... patient’s record the radiation dose index (CTDIvol, DLP, or size-specific dose estimate [SSDE]) on every study produced during a diagnostic computed tomography (CT) examination. The radiation dose index must be exam specific, summarized by series or anatomic area, and documented in a retrievable for ...
... patient’s record the radiation dose index (CTDIvol, DLP, or size-specific dose estimate [SSDE]) on every study produced during a diagnostic computed tomography (CT) examination. The radiation dose index must be exam specific, summarized by series or anatomic area, and documented in a retrievable for ...
Dosimetric verification of respiratory
... to treat cancer. When implementing radiation therapy into the course of treatment a common goal is applied to all types of cancer: Deliver the prescribed dose to the target while sparing as much normal tissue as possible. Delineation of the GTV (gross tumor volume) is contoured onto the treatment pl ...
... to treat cancer. When implementing radiation therapy into the course of treatment a common goal is applied to all types of cancer: Deliver the prescribed dose to the target while sparing as much normal tissue as possible. Delineation of the GTV (gross tumor volume) is contoured onto the treatment pl ...
Neuroradiology Articles From Around the World
... MRI of the lumbosacral spine is frequently performed in the imaging workup of patients with low back pain, sciatica, or both; incidental extraspinal malignancies that may be more relevant than the spinal findings can be found in these routine MRI studies. The study population included 26 patients: 1 ...
... MRI of the lumbosacral spine is frequently performed in the imaging workup of patients with low back pain, sciatica, or both; incidental extraspinal malignancies that may be more relevant than the spinal findings can be found in these routine MRI studies. The study population included 26 patients: 1 ...
Tomotherapy: A "Revolution" in Radiation Therapy
... treatment, and (3) reconstruction of the actual dose delivered to the patient with the possibility of making corrections in subsequent fractions. Although megavoltage CT images generally have inferior tissue contrast compared with kilovoltage CT, research to date demonstrates that imaging using mega ...
... treatment, and (3) reconstruction of the actual dose delivered to the patient with the possibility of making corrections in subsequent fractions. Although megavoltage CT images generally have inferior tissue contrast compared with kilovoltage CT, research to date demonstrates that imaging using mega ...
Special Features of the Angular Distribution of Radiation
... regular and chaotic, with transitions between them. The analytical description of the particle dynamics can be conducted only in some limiting cases. Thus, for example, the theory of multiple scattering of relativistic charged particles on atomic strings of a crystal, based on the continuous string ...
... regular and chaotic, with transitions between them. The analytical description of the particle dynamics can be conducted only in some limiting cases. Thus, for example, the theory of multiple scattering of relativistic charged particles on atomic strings of a crystal, based on the continuous string ...
Image quality vs radiation dose of four cone beam computed
... effective patient dose can then be established by correlating effective dose levels with those technical measures.13 For the evaluation of the image quality, analysis on physical8,14 as well as anthropomorphic phantoms8 can be used. This paper is based on a combined research strategy reported in two ...
... effective patient dose can then be established by correlating effective dose levels with those technical measures.13 For the evaluation of the image quality, analysis on physical8,14 as well as anthropomorphic phantoms8 can be used. This paper is based on a combined research strategy reported in two ...
Simple methods to reduce patient dose in a
... delivered in a CBCT procedure (Varian, half-fan acquisition, 650 projections, 125 kVp) was assessed using a cylindrical Perspex phantom (diameter, 32 cm) with a calibrated Farmer type ionisation chamber. A copper filter (thickness, 0.15 mm) was introduced increasing the half value layer of the beam ...
... delivered in a CBCT procedure (Varian, half-fan acquisition, 650 projections, 125 kVp) was assessed using a cylindrical Perspex phantom (diameter, 32 cm) with a calibrated Farmer type ionisation chamber. A copper filter (thickness, 0.15 mm) was introduced increasing the half value layer of the beam ...
In-laboratory diffraction-enhanced x-ray imaging (DEXI
... mGy and 4 mGy respectively. For the soft-tissue structures, the calculated surface dose is much less than the radiation dose acquired for the same type of tissue during a conventional radiography scan (3-4 mGy) [12]. The calculated surface dose for the hard-tissue structures, however, is equivalent ...
... mGy and 4 mGy respectively. For the soft-tissue structures, the calculated surface dose is much less than the radiation dose acquired for the same type of tissue during a conventional radiography scan (3-4 mGy) [12]. The calculated surface dose for the hard-tissue structures, however, is equivalent ...
Optimizing radiation dose by varying age at pediatric temporal bone
... To assess the middle and inner ear congenital hearing deficits, infection, and trauma in children, they are subjected to temporal bone computed tomography (CT).(1-3) Pediatric imaging protocols should be adapted to the size or age of the child to avoid excessive radiation doses.(4,5) However, at tem ...
... To assess the middle and inner ear congenital hearing deficits, infection, and trauma in children, they are subjected to temporal bone computed tomography (CT).(1-3) Pediatric imaging protocols should be adapted to the size or age of the child to avoid excessive radiation doses.(4,5) However, at tem ...
CT Accreditation Program: Image Quality and Dose
... Volume CTDIW (CTDIvol) CTDIvol = CTDIW • N • T / I where I = the table increment per axial scan, or the table increment per rotation of the x-ray tube in a helical scan. In helical CT, the term pitch (P) is defined as the ratio of the table increment per tube rotation to the nominal (total) width of ...
... Volume CTDIW (CTDIvol) CTDIvol = CTDIW • N • T / I where I = the table increment per axial scan, or the table increment per rotation of the x-ray tube in a helical scan. In helical CT, the term pitch (P) is defined as the ratio of the table increment per tube rotation to the nominal (total) width of ...
3 JCI dosimetry for CT
... series or anatomic area, and documented in a retrievable format. The [critical access] hospital reviews and analyzes incidents where the radiation dose index (CTDIvol, DLP, or size-specific dose estimate [SSDE]) from diagnostic CT examinations exceeded expected dose index ranges identified in ima ...
... series or anatomic area, and documented in a retrievable format. The [critical access] hospital reviews and analyzes incidents where the radiation dose index (CTDIvol, DLP, or size-specific dose estimate [SSDE]) from diagnostic CT examinations exceeded expected dose index ranges identified in ima ...
Modern Radiation Therapy for Hodgkin Lymphoma: Field and Dose
... necessary for disease control in this era of combined modality therapy. The use of INRT and of lower doses in early-stage HL is supported by available data. Although the use of ISRT has not yet been validated in a formal study, it is more conservative than INRT, accounting for suboptimal information ...
... necessary for disease control in this era of combined modality therapy. The use of INRT and of lower doses in early-stage HL is supported by available data. Although the use of ISRT has not yet been validated in a formal study, it is more conservative than INRT, accounting for suboptimal information ...
Workflow and Clinical Decision Support for Radiation Oncology
... definitions of the target and surrounding anatomical features. In some cases these regions can be generated via automated segmentation algorithms. Automated segmentation is often based on trying to identify connected edges which are closely matched to the underlying image data based on absolute imag ...
... definitions of the target and surrounding anatomical features. In some cases these regions can be generated via automated segmentation algorithms. Automated segmentation is often based on trying to identify connected edges which are closely matched to the underlying image data based on absolute imag ...
Weightbearing CBCT, MDCT, and 2D imaging dosimetry of the foot
... foot and ankle. It has been estimated that from 1.5% to 2% of all US cancers may be attributed to computed tomography (CT) studies alone [6]. Medical CT scan doses vary widely depending on the anatomic region and purpose of the scan [7]. Dose is especially important when considering the adolescent a ...
... foot and ankle. It has been estimated that from 1.5% to 2% of all US cancers may be attributed to computed tomography (CT) studies alone [6]. Medical CT scan doses vary widely depending on the anatomic region and purpose of the scan [7]. Dose is especially important when considering the adolescent a ...
Special procedures and techniques in radiotherapy
... be used to calculate MU for-a patient of given at the prescription point. ...
... be used to calculate MU for-a patient of given at the prescription point. ...
Cone Beam (CT) Radiography - School of Dental Medicine
... responsibility for adequate training and education on its utilization to both maximize its diagnostic and therapeutic potential while considering the risk/benefit of ionizing radiation to patients. ...
... responsibility for adequate training and education on its utilization to both maximize its diagnostic and therapeutic potential while considering the risk/benefit of ionizing radiation to patients. ...
Introduction and Overview: Intravascular Brachytherapy
... they interpret. These radiologists have relatively little direct involvement with patients. Interventional radiology, however, is quite different. They have a much more active and direct role in patient care. Interventional radiology procedures may be categorized broadly as diagnostic procedures, no ...
... they interpret. These radiologists have relatively little direct involvement with patients. Interventional radiology, however, is quite different. They have a much more active and direct role in patient care. Interventional radiology procedures may be categorized broadly as diagnostic procedures, no ...
Quality Control in CT, a teamwork - 2015 Joint Congress on Medical
... Standardize performance assessment methodology and the quality criteria's in medical imaging; Provide tools to hospitals and local imaging teams, that allow them to: Monitor the performance of medical imaging systems and the application of radiation protection practices, in their daily work; ...
... Standardize performance assessment methodology and the quality criteria's in medical imaging; Provide tools to hospitals and local imaging teams, that allow them to: Monitor the performance of medical imaging systems and the application of radiation protection practices, in their daily work; ...
Radiation burn
A radiation burn is damage to the skin or other biological tissue caused by exposure to radiation. The radiation types of greatest concern are thermal radiation, radio frequency energy, ultraviolet light and ionizing radiation.The most common type of radiation burn is a sunburn caused by UV radiation. High exposure to X-rays during diagnostic medical imaging or radiotherapy can also result in radiation burns. As the ionizing radiation interacts with cells within the body—damaging them—the body responds to this damage, typically resulting in erythema—that is, redness around the damaged area. Radiation burns are often associated with radiation-induced cancer due to the ability of ionizing radiation to interact with and damage DNA, occasionally inducing a cell to become cancerous. Cavity magnetrons can be improperly used to create surface and internal burning. Depending on the photon energy, gamma radiation can cause very deep gamma burns, with 60Co internal burns are common. Beta burns tend to be shallow as beta particles are not able to penetrate deep into the person; these burns can be similar to sunburn.Radiation burns can also occur with high power radio transmitters at any frequency where the body absorbs radio frequency energy and converts it to heat. The U.S. Federal Communications Commission (FCC) considers 50 watts to be the lowest power above which radio stations must evaluate emission safety. Frequencies considered especially dangerous occur where the human body can become resonant, at 35 MHz, 70 MHz, 80-100 MHz, 400 MHz, and 1 GHz. Exposure to microwaves of too high intensity can cause microwave burns.