effective physics education for optimizing ct image quality and dose
... Education, Image Quality, Radiation Dose Management. INTRODUCTION Figure 1. The model of a program to provide physics education to support clinical CT procedures. ...
... Education, Image Quality, Radiation Dose Management. INTRODUCTION Figure 1. The model of a program to provide physics education to support clinical CT procedures. ...
to presentation - Eastern Radiological Society
... • Calculated using Reference Phantoms on Single Axial Image – C.T.D.I.vol • Adjusts for Scanning Parameters • Pitch • Beam Width – Dose Length Product (D.L.P.) • Calculated from CTDIvol Times Area Scanned • Provided on user interface of all scanners • Can be converted to effective dose with a table ...
... • Calculated using Reference Phantoms on Single Axial Image – C.T.D.I.vol • Adjusts for Scanning Parameters • Pitch • Beam Width – Dose Length Product (D.L.P.) • Calculated from CTDIvol Times Area Scanned • Provided on user interface of all scanners • Can be converted to effective dose with a table ...
AAPM Licensure Update
... – Specific phantom used in protocols may or may not be displayed – 16 cm phantom is typically used to represent the head and pediatric ...
... – Specific phantom used in protocols may or may not be displayed – 16 cm phantom is typically used to represent the head and pediatric ...
Total Solutions
... thousands of individual beams of radiation from virtually any radial angle around the patient with beams that can vary in intensity in 10% steps. Carving out extremely conformal dose distributions and steep dose gradients, serial tomotherapy delivers the beams to — and tangential to — the target, sp ...
... thousands of individual beams of radiation from virtually any radial angle around the patient with beams that can vary in intensity in 10% steps. Carving out extremely conformal dose distributions and steep dose gradients, serial tomotherapy delivers the beams to — and tangential to — the target, sp ...
How Safe are Medical x-rays? Environmental
... What are the Effects of x-ray Exposure? X-rays absorbed by the body during medical procedures release energy to produce ionisation. Ionisation is the release of electrons from atoms and molecules which may then produce chemical and biological change. The more x-rays absorbed during an exposure, the ...
... What are the Effects of x-ray Exposure? X-rays absorbed by the body during medical procedures release energy to produce ionisation. Ionisation is the release of electrons from atoms and molecules which may then produce chemical and biological change. The more x-rays absorbed during an exposure, the ...
Application of Cone Beam Computed Tomography Imaging to
... Images of maxillofacial skeleton demonstrating 2 Dimensional view, haziness, overlapping, artefacts, distortion etc. ...
... Images of maxillofacial skeleton demonstrating 2 Dimensional view, haziness, overlapping, artefacts, distortion etc. ...
Functional Brain Imaging with Single Photon Emission
... localisation of radiopharmaceuticals in nuclear medicine studies. Important clinical areas of SPECT imaging include cardiology, neurology, psychiatry and oncology. In conjunction with new and existing radiopharmaceuticals, quantitative SPECT may be used to measure non-invasively blood flow, metaboli ...
... localisation of radiopharmaceuticals in nuclear medicine studies. Important clinical areas of SPECT imaging include cardiology, neurology, psychiatry and oncology. In conjunction with new and existing radiopharmaceuticals, quantitative SPECT may be used to measure non-invasively blood flow, metaboli ...
Interpretation of measured dose data in X
... Patient dose determination is an essential part of the process of optimizing between adequate image quality and radiation detriment in diagnostic radiology. The radiation dose from an X-ray examination is needed to estimate the radiation-induced risk of cancer to the patient. Risk estimates are norm ...
... Patient dose determination is an essential part of the process of optimizing between adequate image quality and radiation detriment in diagnostic radiology. The radiation dose from an X-ray examination is needed to estimate the radiation-induced risk of cancer to the patient. Risk estimates are norm ...
Editorial Review 2016 - Nuclear Medicine, Diagnostic Imaging and
... volunteered their time to review these articles. In this editorial review, we have summarized all the abstracts from the 2016 issue. The first article of 2016 to be published online in the Journal of Diagnostic Imaging in Therapy was on the subject ‘NMR-Active Nuclei for Biological and Biomedical Ap ...
... volunteered their time to review these articles. In this editorial review, we have summarized all the abstracts from the 2016 issue. The first article of 2016 to be published online in the Journal of Diagnostic Imaging in Therapy was on the subject ‘NMR-Active Nuclei for Biological and Biomedical Ap ...
in head and neck cancer
... Patients with the tumour types for which there is evidence that prolongation of treatment affects outcome, and who are being treated radically with curative intent. The data reviewed show very strong evidence that prolongation of overall treatment time affects treatment outcome or local tumour contr ...
... Patients with the tumour types for which there is evidence that prolongation of treatment affects outcome, and who are being treated radically with curative intent. The data reviewed show very strong evidence that prolongation of overall treatment time affects treatment outcome or local tumour contr ...
bushnellbaum 2011 endocrinol metab clin north
... overall survival.37 In general, specificity is excellent, particularly when SPECT/CT is used. False-positive results are most commonly observed in inflammatory or infectious lesions and uncommonly in other tumor types.20 Fig. 2 shows an example of SPECT/CT with In-111 pentetreotide in a patient with ...
... overall survival.37 In general, specificity is excellent, particularly when SPECT/CT is used. False-positive results are most commonly observed in inflammatory or infectious lesions and uncommonly in other tumor types.20 Fig. 2 shows an example of SPECT/CT with In-111 pentetreotide in a patient with ...
Octreotide (Somatostatin
... Primary Indications: Detection and staging of neuroendocrine tumors containing somatostatin receptors, especially carcinoid tumors, paragangliomas, gastrinomas, and other pancreatic islet cell tumors. Sensitivity for detection of pheochro-mocytomas and neuroblastomas is comparable to that of scintig ...
... Primary Indications: Detection and staging of neuroendocrine tumors containing somatostatin receptors, especially carcinoid tumors, paragangliomas, gastrinomas, and other pancreatic islet cell tumors. Sensitivity for detection of pheochro-mocytomas and neuroblastomas is comparable to that of scintig ...
Imaging is an indispensable tool in modern medicine, yet
... slice images of the inside of the body. It is one of the fastest and most accurate imaging tools, and an examination allows the whole body to be scanned in less than 20 seconds. CT use has increased dramatically over the last two decades, including in trauma radiology, where it can help improve chan ...
... slice images of the inside of the body. It is one of the fastest and most accurate imaging tools, and an examination allows the whole body to be scanned in less than 20 seconds. CT use has increased dramatically over the last two decades, including in trauma radiology, where it can help improve chan ...
An immobilization and localization technique for SRT and IMRT of
... occupied by them. However, there were small 共1.2% on the average兲 differences between structure volumes calculated by CORVUS and X-knife, respectively. This difference may be attributed to different volume calculation algorithms 共contour-based on X-Knife versus voxel-based on CORVUS兲. The difference ...
... occupied by them. However, there were small 共1.2% on the average兲 differences between structure volumes calculated by CORVUS and X-knife, respectively. This difference may be attributed to different volume calculation algorithms 共contour-based on X-Knife versus voxel-based on CORVUS兲. The difference ...
contrast enhansed spectral mammography
... rate, the staging and the selection of patients for biopsy. CESM could also be of particular interest for the assessment of the extent of breast cancer, for dense mammograms, for the detection of contralateral and/or multifocal breast cancers, and for contra-indications of MR. This technique should ...
... rate, the staging and the selection of patients for biopsy. CESM could also be of particular interest for the assessment of the extent of breast cancer, for dense mammograms, for the detection of contralateral and/or multifocal breast cancers, and for contra-indications of MR. This technique should ...
Patient-Centered Radiology
... “Freddie Odlum spent two terrible days waiting by the phone for her doctor to call. She had had a CT scan to investigate a suspicious mass in her lungs and Ms. Odlum, a Los Angeles breast cancer patient, was all too aware that if the cancer had spread, her prognosis would not be good. “But her docto ...
... “Freddie Odlum spent two terrible days waiting by the phone for her doctor to call. She had had a CT scan to investigate a suspicious mass in her lungs and Ms. Odlum, a Los Angeles breast cancer patient, was all too aware that if the cancer had spread, her prognosis would not be good. “But her docto ...
Chapter 3: Interaction of Radiation with Matter in
... 1. Identify which photon interactions are dominant for each of the following imaging modalities: mammography, projection radiography, fluoroscopy, CT, and nuclear medicine imaging procedures. 2. Understand how image quality and patient dose are affected by these interactions. 3. What are the appropr ...
... 1. Identify which photon interactions are dominant for each of the following imaging modalities: mammography, projection radiography, fluoroscopy, CT, and nuclear medicine imaging procedures. 2. Understand how image quality and patient dose are affected by these interactions. 3. What are the appropr ...
RE Radiology sign off
... Is this a Single Centre or Multi Centre Study: Number of patients in the trial that require imaging at Austin Radiology: Total expected no of exams per patient: ...
... Is this a Single Centre or Multi Centre Study: Number of patients in the trial that require imaging at Austin Radiology: Total expected no of exams per patient: ...
ACR Technical Standard for Diagnostic Medical Physics
... when available. Tables of patient radiation absorbed dose for representative examinations (e.g., head, ...
... when available. Tables of patient radiation absorbed dose for representative examinations (e.g., head, ...
a time of opportunity for medical physics
... Physicists discovered x rays and radioactivity, characterized different radiations, developed radiation detectors, designed radiation sources, quantified radiation dose, and assisted in early clinical applications of radiation. In more recent times, physicists helped develop high-energy x- and -ray ...
... Physicists discovered x rays and radioactivity, characterized different radiations, developed radiation detectors, designed radiation sources, quantified radiation dose, and assisted in early clinical applications of radiation. In more recent times, physicists helped develop high-energy x- and -ray ...
FLUOROSCOPY MODULE Jenniefer Kho, MD
... residency training programs. Novice surgeons learn on-the-go in the operating room on real patients, which pose concerns about patient safety and learning efficacy. Currently, fluoroscopy is the main imaging modality in orthopaedic surgery despite advancements in navigation surgery. There is more aw ...
... residency training programs. Novice surgeons learn on-the-go in the operating room on real patients, which pose concerns about patient safety and learning efficacy. Currently, fluoroscopy is the main imaging modality in orthopaedic surgery despite advancements in navigation surgery. There is more aw ...
Descarge la noticia
... exposures having effective doses above 150–200 mSv, but there is considerable disagreement on the excess relative risk of cancer in the dose range below this level [17–21]. The 15-country workers study conducted by the International Agency for Research on Cancer (in over 407,000 nuclear workers with ...
... exposures having effective doses above 150–200 mSv, but there is considerable disagreement on the excess relative risk of cancer in the dose range below this level [17–21]. The 15-country workers study conducted by the International Agency for Research on Cancer (in over 407,000 nuclear workers with ...
Simple methods to reduce patient dose in a
... the dose requires careful justification as it may be large, not only in the region of the target but also in the surrounding normal structures. Therefore, it is not surprising that dose delivered in megavoltage [3, 11] and kilovoltage [12–14] CBCT has received consideration recently. There are sever ...
... the dose requires careful justification as it may be large, not only in the region of the target but also in the surrounding normal structures. Therefore, it is not surprising that dose delivered in megavoltage [3, 11] and kilovoltage [12–14] CBCT has received consideration recently. There are sever ...
Comparison of radiation dose and image quality between sequential
... t-test are both significant as both radiation dose indicators obtained a p-value < 0.05. The latter means that the mean CTDIvol and DLP scores of both scanning techniques differ significantly. The fact that both dose indicators in spiral technique were significantly lower than those obtained by the ...
... t-test are both significant as both radiation dose indicators obtained a p-value < 0.05. The latter means that the mean CTDIvol and DLP scores of both scanning techniques differ significantly. The fact that both dose indicators in spiral technique were significantly lower than those obtained by the ...
Neutron capture therapy of cancer
Neutron capture therapy (NCT) is a noninvasive therapeutic modality for treating locally invasive malignant tumors such as primary brain tumors and recurrent head and neck cancer. It is a two step procedure: first, the patient is injected with a tumor localizing drug containing a non-radioactive isotope that has a high propensity or cross section (σ) to capture slow neutrons. The cross section of the capture agent is many times greater than that of the other elements present in tissues such as hydrogen, oxygen, and nitrogen. In the second step, the patient is radiated with epithermal neutrons, which after losing energy as they penetrate tissue, are absorbed by the capture agent which subsequently emits high-energy charged particles, thereby resulting in a biologically destructive nuclear reaction (Fig.1).All of the clinical experience to date with NCT is with the non-radioactive isotope boron-10, and this is known as boron neutron capture therapy (BNCT). At this time, the use of other non-radioactive isotopes, such as gadolinium, has been limited, and to date, it has not been used clinically. BNCT has been evaluated clinically as an alternative to conventional radiation therapy for the treatment of malignant brain tumors (gliomas), and more recently, recurrent, locally advanced head and neck cancer.