Download or read book Radiation Dose Reduction in Pediatric Abdominal CT Scanning written by Ihab Roushdy Kamel and published by . This book was released on 1993 with total page 116 pages. Available in PDF, EPUB and Kindle. Book excerpt: Dissertation (Ph.D)--University of Michigan.

Download or read book Radiation Dose from Adult and Pediatric Multidetector Computed Tomography written by D. Tack and published by Springer Science & Business Media. This book was released on 2007-12-31 with total page 275 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book considers in depth all the factors that influence the radiation dose and the risk associated with MDCT in children and adults. Only a small proportion of referring clinicians, radiologists, and technologists are aware of both the radiation risks and their underlying mechanisms. The book proposes detailed guidelines for optimization of the radiation dose when using MDCT. It is written by experts of international standing.

Download or read book Radiation Dose from Multidetector CT written by Denis Tack and published by Springer Science & Business Media. This book was released on 2012-06-05 with total page 642 pages. Available in PDF, EPUB and Kindle. Book excerpt: Computed tomography (CT) is a powerful technique providing precise and confident diagnoses. The burgeoning use of CT has resulted in an exponential increase in collective radiation dose to the population. Despite investigations supporting the use of lower radiation doses, surveys highlight the lack of proper understanding of CT parameters that affect radiation dose. Dynamic advances in CT technology also make it important to explain the latest dose-saving strategies in an easy-to-comprehend manner. This book aims to review all aspects of the radiation dose from CT and to provide simple rules and tricks for radiologists and radiographers that will assist in the appropriate use of CT technique. The second edition includes a number of new chapters on the most up-to-date strategies and technologies for radiation dose reduction while updating the outstanding contents of the first edition. Vendor perspectives are included, and an online image gallery will also be available to readers.

Download or read book Radiation Dose in Pediatric Patients Undergoing Chest and Abdominal CT in Jose Reyes Memorial Medical Center written by Dona May O. Taguba and published by . This book was released on 2012 with total page 54 pages. Available in PDF, EPUB and Kindle. Book excerpt: Pediatric patients have higher risk of cancer than adult patients when exposed to Computed Tomography (CT) radiation. This study intends to contributeto the establishment of national diagnostic reference level for CT doses that will be used for the radiation protection of patients. The CT Machine specifications were listed the scanning parameters of the CT scanning machines during the chest and abdominal CT examination and demographic profiles of pediatric patients whose ages are between 0-15 years were noted. The CTDIw for chest and abdominal CT are measured using a 16cm diameter body equivalent acrylic phantom and Unfors pencil type ioniization chamber. The DLP and DLP slice were computed using the measured CTDIw and the phantom data. the effective dose was also estimated for both procedures. The summary of results of CTDIw showed that the dose received by pediatric patients im age groups 1, 2, and 3 received the same dose of 18.038 mGy and 20.43 mGy was received by patient age group 4. The total DPL values are the same for age groups 1-3. The value of 270.6 mGy-cm is 32.4% lower in age groups 2, 55% lower in group 3 and a value of 306.4 mGy-cm is 45.2% lesser in age group 4. All these values are within the initial diagnostic reference level. On the contry, Age group 1 has a computed DLP of 270.6 mGy-cm which is 35.3 higher than the initial diagnostic reference level. The results showed that 0 year old patients are at risk the most since the computed effective doses are not within the initial reference values of adjustments were not made according to patient's age. Without sacrificing the image quality, this suggests the patients can receive lower radiation doses if necessary modifications would be made. Thus risks from effects of CT radiation can be minimized.

Download or read book Nationwide Evaluation of X ray Trends written by Nationwide Evaluation of X-ray Trends Task Force and published by . This book was released on 1976 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Pediatric PET Imaging written by Martin Charron and published by Springer Science & Business Media. This book was released on 2006-04-19 with total page 616 pages. Available in PDF, EPUB and Kindle. Book excerpt: The technique for successfully completing a PET procedure is complex and involves a knowledge of physics, pharmacy, anatomy, physiology, and the disease process; applying PET scanning to children is even more challenging and technically demanding. One cannot simply adopt the approach used for adults but instead must receive specialized training in order to master pediatric PET procedures. This one-of-a-kind, interdisciplinary book is one of the first practical guides to imaging children with PET. The text opens with a section that focuses on practical and technical issues of pediatric PET imaging, including radiation dose and sedation. Principles of operation, instrumentation, and nuclear medicine regulations are also discussed. Subsequent sections cover the clinical applications of PET in pediatrics. With contributions from leading international authorities in the field, each chapter is heavily illustrated and provides the reader with extensive coverage of the essentials of clinical PET studies in oncology and neurology, which standout as key areas for PET imaging in pediatrics.

Download or read book Health Risks from Exposure to Low Levels of Ionizing Radiation written by Committee to Assess Health Risks from Exposure to Low Levels of Ionizing Radiation and published by National Academies Press. This book was released on 2006-03-23 with total page 422 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is the seventh in a series of titles from the National Research Council that addresses the effects of exposure to low dose LET (Linear Energy Transfer) ionizing radiation and human health. Updating information previously presented in the 1990 publication, Health Effects of Exposure to Low Levels of Ionizing Radiation: BEIR V, this book draws upon new data in both epidemiologic and experimental research. Ionizing radiation arises from both natural and man-made sources and at very high doses can produce damaging effects in human tissue that can be evident within days after exposure. However, it is the low-dose exposures that are the focus of this book. So-called “late” effects, such as cancer, are produced many years after the initial exposure. This book is among the first of its kind to include detailed risk estimates for cancer incidence in addition to cancer mortality. BEIR VII offers a full review of the available biological, biophysical, and epidemiological literature since the last BEIR report on the subject and develops the most up-to-date and comprehensive risk estimates for cancer and other health effects from exposure to low-level ionizing radiation.

Download or read book Reference Levels and Achievable Doses in Medical and Dental Imaging written by National Council on Radiation Protection and Measurements. Scientific Committee 4-3 on Diagnostic Reference Levels and Achievable Doses, and Reference Levels in Medical Imaging: Recommendations for Applications in the United States and published by National Council of Teachers of English. This book was released on 2012 with total page 133 pages. Available in PDF, EPUB and Kindle. Book excerpt: Diagnostic reference levels (DRLs) are used in medical imaging to indicate whether the patient radiation dose or amount of administered activity from a specific procedure are unusually high or low for that procedure. DRLs are the first step in the optimization process to manage patient dose commensurate with the medical purpose of the procedure. Achievable dose is an optimization goal, based on survey data, and typically defined as the median value (50th percentile) of the dose distribution of standard techniques and technologies in widespread use. The overarching goal is to obtain image quality consistent with the clinical objective, while avoiding unnecessary radiation. Too low an exposure, however, is also to be avoided if it results in an inadequate image. This Report represents an important continuation of NCRP reports on radiation safety and health protection in medicine and lays the foundation for the development and application of DRLs and achievable doses for diagnostic x-ray examinations. The concept of DRLs is extended to procedures other than diagnostic x-ray examinations (e.g., for interventional radiology) by the use of reference levels (RLs), which represent radiation dose levels that if exceeded prompt an evaluation of the reasons why. This Report discusses the establishment and use of RLs for fluoroscopically-guided interventional (FGI) procedures and describes why a different approach from DRLs is required to account for the greater complexity of interventional radiology compared with standard medical imaging procedures. Phantoms are models of the human body used in radiation dosimetry studies to estimate exposures to patients. The use of phantom survey data in the United States is contrasted with the use of patient-based dose data in Europe for establishing DRLs, achievable doses, and RLs. The use of phantom survey data is reviewed for determining DRLs for imaging modalities such as projection radiography, fluoro

Download or read book Radiomics and Radiogenomics written by Ruijiang Li and published by CRC Press. This book was released on 2019-07-09 with total page 420 pages. Available in PDF, EPUB and Kindle. Book excerpt: Radiomics and Radiogenomics: Technical Basis and Clinical Applications provides a first summary of the overlapping fields of radiomics and radiogenomics, showcasing how they are being used to evaluate disease characteristics and correlate with treatment response and patient prognosis. It explains the fundamental principles, technical bases, and clinical applications with a focus on oncology. The book’s expert authors present computational approaches for extracting imaging features that help to detect and characterize disease tissues for improving diagnosis, prognosis, and evaluation of therapy response. This book is intended for audiences including imaging scientists, medical physicists, as well as medical professionals and specialists such as diagnostic radiologists, radiation oncologists, and medical oncologists. Features Provides a first complete overview of the technical underpinnings and clinical applications of radiomics and radiogenomics Shows how they are improving diagnostic and prognostic decisions with greater efficacy Discusses the image informatics, quantitative imaging, feature extraction, predictive modeling, software tools, and other key areas Covers applications in oncology and beyond, covering all major disease sites in separate chapters Includes an introduction to basic principles and discussion of emerging research directions with a roadmap to clinical translation

Download or read book A Survey of Pediatric CT Protocols and Radiation Doses in South Korean Hospitals to Optimize the Radiation Dose for Pediatric CT Scanning written by and published by . This book was released on 2015 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Abstract : Abstract: Children are at greater risk of radiation exposure than adults because the rapidly dividing cells of children tend to be more radiosensitive and they have a longer expected life time in which to develop potential radiation injury. Some studies have surveyed computed tomography (CT) radiation doses and several studies have established diagnostic reference levels according to patient age or body size; however, no survey of CT radiation doses with a large number of patients has yet been carried out in South Korea. The aim of the present study was to investigate the radiation dose in pediatric CT examinations performed throughout South Korea. From 512 CT (222 brain CT, 105 chest CT, and 185 abdominopelvic CT) scans that were referred to our tertiary hospital, a dose report sheet was available for retrospective analysis of CT scan protocols and dose, including the volumetric CT dose index (CTDIvol ), dose-length product (DLP), effective dose, and size-specific dose estimates (SSDE). At 55.2%, multiphase CT was the most frequently performed protocol for abdominopelvic CT. Tube current modulation was applied most often in abdominopelvic CT and chest CT, accounting for 70.1% and 62.7%, respectively. Regarding the CT dose, the interquartile ranges of the CTDIvol were 11.1 to 22.5 (newborns), 16.6 to 39.1 (≤1 year), 14.6 to 41.7 (2–5 years), 23.5 to 44.1 (6–10 years), and 31.4 to 55.3 (≤15 years) for brain CT; 1.3 to 5.7 (≤1 year), 3.9 to 6.8 (2–5 years), 3.9 to 9.3 (6–10 years), and 7.7 to 13.8 (≤15 years) for chest CT; and 4.0 to 7.5 (≤1 year), 4.2 to 8.9 (2–5 years), 5.7 to 12.4 (6–10 years), and 7.6 to 16.6 (≤15 years) for abdominopelvic CT. The SSDE and CTDIvol were well correlated for patients

Download or read book Diseases of the Chest Breast Heart and Vessels 2019 2022 written by Juerg Hodler and published by Springer. This book was released on 2019-02-19 with total page 238 pages. Available in PDF, EPUB and Kindle. Book excerpt: This open access book focuses on diagnostic and interventional imaging of the chest, breast, heart, and vessels. It consists of a remarkable collection of contributions authored by internationally respected experts, featuring the most recent diagnostic developments and technological advances with a highly didactical approach. The chapters are disease-oriented and cover all the relevant imaging modalities, including standard radiography, CT, nuclear medicine with PET, ultrasound and magnetic resonance imaging, as well as imaging-guided interventions. As such, it presents a comprehensive review of current knowledge on imaging of the heart and chest, as well as thoracic interventions and a selection of "hot topics". The book is intended for radiologists, however, it is also of interest to clinicians in oncology, cardiology, and pulmonology.

Download or read book Gastrointestinal Imaging written by Angela D. Levy and published by Rotations in Radiology. This book was released on 2015 with total page 761 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume presents a comprehensive review of gastrointestinal pathologies commonly encountered by practising radiologists and residents in training. The chapters are organised by organ system and include the pharynx and esophagus, stomach, small bowel, appendix, colon, anorectum, liver, gallbladder, bile ducts, pancreas, spleen, peritoneum, mesentery, and abdominal wall, and one on multisystem disorders. The book offers a guided approach to imaging diagnosis with examples of all imaging modalities complimented by the basics of technique and interpretation and the nuances necessary to reach the best diagnosis.

Download or read book MDCT written by Mannudeep K. Kalra and published by Springer Science & Business Media. This book was released on 2009-11-16 with total page 412 pages. Available in PDF, EPUB and Kindle. Book excerpt: "MDCT: From Protocols to Practice" tackles contemporary and topical issues in MDCT technology and applications. As an updated edition of MDCT: A Practical Approach, this volume offers new content as well as revised chapters from the previous volume. New chapters discuss important topics such as imaging of children and obese subjects, the use of contrast medium in pregnant women, coronary MDCT angiography, and PET/CT in abdominal and pelvic malignancies. Furthermore an Appendix with over 50 updated MDCT scanning protocols completes this publication. The book emphasizes the practical aspects of MDCT, making it an invaluable source of information for radiologists, residents, medical physicists, and radiology technologists in everyday clinical practice.

Download or read book Imaging of Head and Neck Cancer written by A. T. Ahuja and published by Cambridge University Press. This book was released on 2003-01-06 with total page 240 pages. Available in PDF, EPUB and Kindle. Book excerpt: This concise integrated handbook looks at all available imaging methods for head and neck cancer, highlighting the strengths and weaknesses of each method. The information is provided in a clinical context and will guide radiologists as to the information the clinician actually needs when managing a patient with head and neck cancer. It will also provide the clinician with the advantages and limitations of imaging. The text therefore deals with Ultrasound, CT and MRI. The initial chapters aim to give the reader a core knowledge, which can be used in imaging by the various methods described. The subsequent chapters are directed towards clinical problems and deal with the common cancers in a logical order.

Download or read book ICRP Publication 110 written by ICRP, and published by SAGE Publications Limited. This book was released on 2010-05-26 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report describes the development and intended use of the computational phantoms of the Reference Male and Reference Female. In its 2007 Recommendations, ICRP adopted these computational phantoms for forthcoming updates of organ dose coefficients for both internal and external radiation sources (ICRP, 2007). The phantoms are based on medical image data of real people, yet are consistent with the data given in Publication 89 (ICRP, 2002) on the reference anatomical and physiological parameters for both male and female subjects. The reference phantoms are constructed after modifying the voxel models (Golem and Laura) of two individuals whose body height and mass resembled the reference data. The organ masses of both models were adjusted to the ICRP data on the adult Reference Male and Reference Female, without compromising their anatomic realism. This report describes the methods used for this process and the characteristics of the resulting computational phantoms. To access the CD material please click here

Download or read book Pediatric Body CT written by Marilyn J. Siegel and published by Lippincott Williams & Wilkins. This book was released on 2008 with total page 500 pages. Available in PDF, EPUB and Kindle. Book excerpt: Dr. Siegel's definitive reference on pediatric body CT is now in its Second Edition—thoroughly revised to reflect the latest techniques and the growing use of CT for pediatric patients. Chapters provide detailed, practical protocols for cardiac, vascular, thoracic, abdominal, pelvic, and musculoskeletal imaging and thoroughly describe and illustrate normal anatomy and pathologic findings. The book contains over 1,100 images obtained with state-of-the-art technology, including many three-dimensional images. This edition's new chapter on cardiac and vascular imaging demonstrates the utility of CT as a powerful diagnostic tool for cardiac anomalies. A full-color insert depicting vascular and cardiac anomalies is also included. A companion Website offers the fully searchable text and a full-color online image bank. (www.pediatricbodyct.com)

Download or read book Referral Guidelines for Imaging written by European Commission. Environment Directorate-General and published by . This book was released on 2001 with total page 132 pages. Available in PDF, EPUB and Kindle. Book excerpt: This booklet sets out referral guidelines that can be used by health professionals qualified to refer patients for imaging. It has evolved from the booklet 'Making the best use of a department of clinical radiology: guidelines for doctors' published by the Royal College of Radiologists in 1998 and can be adopted as a model for Member States. The EU Council Directive 1997/43/EURATOM declared that Member States shall promote the establishment and use of diagnostic reference levels for radiological examinations and guidance thereof. These referral guidelines can be used for that purpose.