Download or read book Webb M ller and Naidich s High Resolution CT of the Lung written by Sujal Desai and published by Lippincott Williams & Wilkins. This book was released on 2020-10-22 with total page 1765 pages. Available in PDF, EPUB and Kindle. Book excerpt: Over the past 30 years high-resolution CT (HRCT) has matured to become an integral part of the multidisciplinary evaluation in diffuse lung disease. In this regard, Webb, Muller and Naidich’s High-Resolution CT of the Lung, 6th Edition, is a ‘gold standard’ reference that aims to keep radiologists and pulmonologists alike at the cutting edge of the ever-evolving field of thoracic imaging. The new US-European author team continues the tradition of excellence which readers have come to expect while the underlying layout and ethos — established by the ‘founding’ author team — remain. The new edition aims to brings readers up to date not only with recent advances but also with the important conceptual changes in thinking in various fields of thoracic imaging. Also featured in this updated edition is authoritative guidance on HRCT findings and differential diagnosis, as well as the characteristics of the common lung diseases assessed using HRCT, all enhanced by a multitude of new images and updated content throughout.

Download or read book Visual grading evaluation of reconstruction methods and dose optimisation in abdominal Computed Tomography written by Bharti Kataria and published by Linköping University Electronic Press. This book was released on 2019-10-15 with total page 164 pages. Available in PDF, EPUB and Kindle. Book excerpt: Since its introduction in the 1970’s CT has emerged as a modality of choice because of its high sensitivity in producing accurate diagnostic images. A third of all Computed Tomography (CT) examinations are abdominal CTs which deliver one of the highest doses among common examinations. An increase in the number of CT examinations has raised concerns about the negative effects of ionising radiation as the dose is cumulative over the life span of the individual. Image quality in CT is closely related to the radiation dose, so that a certain dose with an associated small, but not negligible, risk is a prerequisite for high image quality. Typically, dose reduction in CT results in higher noise and a decrease in low contrast resolution which can be detrimental to the image quality produced. New technology presents a wide range of dose reduction strategies, the latest being iterative reconstruction (IR).The aim of this thesis was to evaluate two different classes of iterative reconstruction algorithms: statistical (SAFIRE) and model-based (ADMIRE) as well as to explore the diagnostic value of a low-dose abdominal CT for optimisation purposes. This thesis included a total of 140 human subjects in four image quality evaluation studies, three of which were prospective studies (Papers I, II and IV) and one retrospective study (Paper III). Visual grading experiments to determine the potential dose reductions, were performed with pairwise comparison of image quality in the same patient at different tube loads (dose) and reconstructed with Filtered back projection (FBP) and SAFIRE strength 1 in a low-dose abdominal CT (Paper I) and FBP and ADMIRE strengths 3 and 5 in a standard dose abdominal CT (Paper II). Paper IV evaluated the impact of slice thicknesses in CT images reconstructed with ADMIRE strengths 3 and 5 when comparing multiplanar reconstruction (MPR) formatted images in a standard dose abdominal CT. Paper III, on the other hand, was an absolute assessment of image quality and pathology between the three phases of a CT Urography (CTU) protocol to explore the diagnostic value of low-dose abdominal CT. The anonymised images were displayed in random order and image quality was assessed by a group of radiologists using image quality criteria from the “European guidelines of quality criteria for CT”. The responses from the reviewer assessment were analysed statistically with ordinal logistic regression i.e. Visual Grading Regression (VGR). Results in Paper I show that a small dose reduction (5-9 %) was possible using SAFIRE strength 1and indicated the need for further research to evaluate the dose reduction potential of higher strengths of the algorithm. In Paper II a 30% dose reduction was possible without change in ADMIRE algorithm strength as no improvement in image quality was observed between tube loads 98- and 140 mAs. When comparing tube loads 42 and 98 mAs, further dose reduction was possible with ADMIRE strength 3 (22-47%). However, for images reconstructed with ADMIRE strength 5, a dose reduction of 34-74% was possible for some, but not all image criteria. Image quality in low-contrast objects such as the liver parenchyma, was affected and a decline in diagnostic confidence was observed. Paper IV showed potential dose reductions are possible with increasing slice thickness from 1 mm to 2 mm (24-35%) and 1 mm to 3mm (25-41%). ADMIRE strength 3 continued to provide diagnostically acceptable images with possible dose reductions for all image criteria assessed. Despite objective evaluations showing a decrease in noise and an increase in contrast to noise ratio, ADMIRE strength 5 had diverse effects on the five image criteria, depending on slice thickness and further dose reductions were limited to certain image criteria. The findings do not support a general recommendation to replace ADMIRE3 with ADMIRE5 in clinical abdominal CT protocols. Paper III studied another aspect of optimisation and results show that visualisation of renal anatomy was as expected in favour of the post-contrast phases when compared to the native phase. Assessment of pathology showed no significant differences between the three phases. Significantly higher diagnostic certainty for renal anatomy was observed for the post-contrast phases when compared to the native phase. Significantly high certainty scores were also seen for the nephrographic phase for incidental findings. The conclusion is that a low-dose series seems to be sufficient as a first-line modality in certain patient groups. This thesis clinically evaluated the effect of IR in abdominal CT imaging and estimated potential dose reductions. The important conclusion from papers I, II and IV is that IR improves image quality in abdominal CT allowing for some dose reductions. However, the clinical utility of the highest strength of the algorithm is limited to certain criteria. The results can be used to optimise the clinical abdominal CT protocol. The conclusion from paper III may increase clinical awareness of the value of the low-dose abdominal protocol when choosing an imaging method for certain patient groups who are more sensitive to radiation. Datortomografi (DT) används i allt större omfattning vid bilddiagnostik och ger en viss stråldos till patienten. DT är en viktig, snabb och patientvänlig undersökningsteknik. En fördel med denna teknik är att bildmaterialet kan rekonstrueras i olika format för att åskådliggöra anatomin på bästasätt beroende på vilken frågeställning som ska besvaras. Joniserande strålning från dessa undersökningar anses öka risken för negativa effekter även om risken för den enskilde patient är mycket liten. Antalet datortomografiundersökningar ökar från år till år vilket kan leda till ökade stråldoser tillbefolkningen. Optimering av undersökningsteknik och val av undersökning för att minska negativa effekter av röntgenstrålning är därför nödvändig. Det övergripande målet med avhandlingen var att utvärdera bildkvalitetvid en DT-undersökning av buken (då dessa medför en av de högstastråldoserna bland de vanliga röntgenundersökningarna), att kvantifieramöjlig stråldosminskning med hjälp av iterativa rekonstruktionsalgoritmer och att utvärdera diagnostiska värdet av lågdosundersökningsteknik vid DT-buk. Av de fyra delstudierna var delarbeten I, II och IV prospektiva och delarbete III retrospektivt. För de prospektiva studierna, samlades bildmaterial in vid en kliniskberättigad undersökning av lågdos-DT av buken (delarbetet I), eller standarddos-DT av buken (delarbetet II och IV). Bilder rekonstruerades meden standard bildrekonstruktionsalgoritm, filtrerad återprojektion (FBP), och med styrka 1 av den iterativa algoritmen SAFIRE (delarbetet I). I delarbeten II och IV, gjordes bildrekonstruktioner med FBP och med styrka 3 och 5 av den iterativa algoritmen ADMIRE. Avidentifierade bildmaterialför varje patient visades parvis i slumpmässig ordning för ett antal granskare och bildkvaliteten bedömdes med hjälp av europeiska bildkriterier. I den retrospektiva studien, delarbete III, hämtades bildmaterialet från utförda DT-urografiundersökningar från bildarkivet. För varje undersökning visades bilder från varje fas i DT-urografiundersökningen separat i slumpmässig ordning. För samtliga delarbeten, hämtades bildkriteriernafrån ”European Guidelines of Quality Criteria for CT” och modifierades för att passa till varje studie. Granskarnas bedömning analyserades med ordinal logistisk regression så kallad visual grading regression (VGR). Resultat från delarbetet I visade att det fanns en signifikant inverkan av dos (p <0,001) och rekonstruktionsalgoritm (p <0,01) på samtliga bildkriterier, med en beräknad möjlig dosminskning på 5–9%. Delarbetet II visade att rekonstruktionsalgoritmen ADMIRE förbättrar bildkvaliteten i jämförelse med FBP. ADMIRE styrka 3 tillåter en dosminskning mellan 22–47% för samtliga bildkriterier medan ADMIRE styrka 5 tillåter en dosminskning mellan 34–74% för nästan alla bedömda bildkriterier utom återgivning av leverns parenkym. Ett mycket oväntat resultat var att bildkvalitén för 70% dosnivå bedömdes som högre eller likvärdig med 100% dosnivå, vilket innebar att stråldosen kan sänkas med 30% utan förändring i algoritm eller styrka. Resultaten av delarbete III visade att avbildning av njuranatomi var som förväntat för varje fas med fördel för kontrastuppladdningsfaserna jämfört med den nativa fasen. Detta var inte ett oväntat resultat eftersom DT-urografiprotokollet är utformat för att visualisera njuranatomi på bästa möjliga sätt. Vid bedömning av patologiska fynd, erhölls dock små och ickesignifikanta skillnader mellan faserna. Däremot noterades signifikant högre bedömningssäkerhet för patologi i njurarna för de kontrast förstärkta faserna jämfört med nativfasen, och endast för bifynd signifikant högre poäng för parenkymfasen. Delarbete IV visade att styrka 5 jämfört med styrka 3 av den iterativa rekonstruktionsalgoritmen, har olika effekter på bedömningen av bildkvalitetskriterierna. Ökning av MPR-snittjocklek från 1 mm till 2 mm eller 3mm, ger en förbättring i bildkvalité, vilket möjliggör en viss dosreduktion. Den kliniska användbarheten av ADMIRE styrka 5 är begränsad, medan ADMIRE styrka 3 levererar bättre bildkvalitet för samtliga undersökta bildkriterier vid datortomografiundersökning av buken. Den viktigaste slutsatsen av delarbeten I, II och IV är att iterativa rekonstruktionsalgoritmer förbättrar bildkvalitet jämfört med FBP för samma stråldos och en dosminskning är möjlig. Detta kan användas för att optimera det kliniska DT-bukundersöknings protokoll. Slutsatsen för delarbetet III var att en lågdos-DT-bukundersökning är ett av många dosreduceringsalternativ, som möjligen kan användas för att minska strålningsbördan hos vissa patientgrupper som är mer känsliga för röntgenstrålning.

Download or read book Highlights in Cardiovascular Imaging 2021 written by Christos Bourantas and published by Frontiers Media SA. This book was released on 2022-07-04 with total page 141 pages. Available in PDF, EPUB and Kindle. Book excerpt:

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 Photoacoustic Tomography written by Minghua Xu and published by CRC PressI Llc. This book was released on 2014-09-30 with total page 400 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Handbook of Medical Imaging written by Jacob Beutel and published by SPIE Press. This book was released on 2000 with total page 542 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume describes concurrent engineering developments that affect or are expected to influence future development of digital diagnostic imaging. It also covers current developments in Picture Archiving and Communications System (PACS) technology, with particular emphasis on integration of emerging imaging technologies into the hospital environment.

Download or read book Machine Learning for Tomographic Imaging written by Ge Wang and published by Programme: Iop Expanding Physi. This book was released on 2019-12-30 with total page 250 pages. Available in PDF, EPUB and Kindle. Book excerpt: Machine learning represents a paradigm shift in tomographic imaging, and image reconstruction is a new frontier of machine learning. This book will meet the needs of those who want to catch the wave of smart imaging. The book targets graduate students and researchers in the imaging community. Open network software, working datasets, and multimedia will be included. The first of its kind in the emerging field of deep reconstruction and deep imaging, Machine Learning for Tomographic Imaging presents the most essential elements, latest progresses and an in-depth perspective on this important topic.

Download or read book COPD written by Sang-Do Lee and published by Springer. This book was released on 2017-10-10 with total page 350 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book explains how analysis of the heterogeneity of chronic obstructive pulmonary disease (COPD) enhances understanding of the condition and leads to improved, personalized treatment. State of the art knowledge is presented on a range of issues related to the heterogeneity of COPD, such as phenotypes (clinical, physiologic, radiologic, etc.), genotypes, and the tools to be used for dissecting heterogeneity (CT, MRI, biomarkers, etc.). Especially modern radiologic imaging holds promise in this context, and its role is described in detail with the aid of numerous illustrations. The implications of the heterogeneity for personalized treatment are clearly identified, with description of an appropriate tailored treatment strategy for each subgroup of patients. Information is provided on both current and emerging strategies, including bronchoscopic lung volume reduction and approaches to the management of pulmonary hypertension and comorbidities. This book will be a great asset in clinical practice and research for all who have an interest in COPD, a leading cause of morbidity and mortality worldwide.

Download or read book Therapy Response Imaging in Oncology written by Mizuki Nishino and published by Springer Nature. This book was released on 2020-01-07 with total page 266 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is a detailed guide to therapy response imaging in cancer patients that fully takes into account the revolutionary progress and paradigm shift in treatment approaches for advanced disease. The opening chapters describe the role of imaging as a “common language” for tumor response evaluation in oncology and address challenges and strategies in the era of precision cancer therapy and cancer immunotherapy. Practical pitfalls are discussed, with emphasis on the importance of approaching cancer as a systemic disease and the need for increased awareness of drug toxicity due to novel therapies. Therapy response imaging in a wide range of cancer types is then comprehensively described and illustrated, using a disease-specific approach. A concluding section focuses on emerging approaches and future directions, including radiomics/radiogenomics, co-clinical imaging, and molecular and functional imaging. Therapy Response Imaging in Oncology will be of high value for radiologists, nuclear medicine physicians, and oncologists. It will also be of interest to cancer care providers and oncology trial investigators.

Download or read book Computed Tomography written by Euclid Seeram and published by Saunders. This book was released on 2009 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Radiologic technologists play an important role in the care and management of patients undergoing advanced imaging procedures. This new edition provides the up-to-date information and thorough coverage you need to understand the physical principles of computed tomography (CT) and safely produce high-quality images. You'll gain valuable knowledge about the practice of CT scanning, effective communication with other medical personnel, and sectional anatomic images as they relate to CT. Features a chapter devoted to quality control testing of CT scanners (both spiral CT and conventional scan-and-stop), helping you achieve and maintain high quality control standards. Provides the latest information on: advances in volume CT scanning; CT fluoroscopy; multi-slice spiral/helical CT; and multi-slice applications such as 3-D imaging, CT angiography, and virtual reality imaging (endoscopy)--all with excellent coverage of state-of-the-art principles, instrumentation, clinical applications and quality control. Two new chapters cover recent developments and important principles of multislice CT and PET/CT, giving you in-depth coverage of these quickly emerging aspects of CT.

Download or read book Medical Imaging Systems written by Andreas Maier and published by Springer. This book was released on 2018-08-02 with total page 263 pages. Available in PDF, EPUB and Kindle. Book excerpt: This open access book gives a complete and comprehensive introduction to the fields of medical imaging systems, as designed for a broad range of applications. The authors of the book first explain the foundations of system theory and image processing, before highlighting several modalities in a dedicated chapter. The initial focus is on modalities that are closely related to traditional camera systems such as endoscopy and microscopy. This is followed by more complex image formation processes: magnetic resonance imaging, X-ray projection imaging, computed tomography, X-ray phase-contrast imaging, nuclear imaging, ultrasound, and optical coherence tomography.

Download or read book Computed Tomography written by Willi A. Kalender and published by John Wiley & Sons. This book was released on 2011-07-07 with total page 372 pages. Available in PDF, EPUB and Kindle. Book excerpt: The book offers a comprehensive and user-oriented description of the theoretical and technical system fundamentals of computed tomography (CT) for a wide readership, from conventional single-slice acquisitions to volume acquisition with multi-slice and cone-beam spiral CT. It covers in detail all characteristic parameters relevant for image quality and all performance features significant for clinical application. Readers will thus be informed how to use a CT system to an optimum depending on the different diagnostic requirements. This includes a detailed discussion about the dose required and about dose measurements as well as how to reduce dose in CT. All considerations pay special attention to spiral CT and to new developments towards advanced multi-slice and cone-beam CT. For the third edition most of the contents have been updated and latest topics like dual source CT, dual energy CT, flat detector CT and interventional CT have been added. The enclosed CD-ROM again offers copies of all figures in the book and attractive case studies, including many examples from the most recent 64-slice acquisitions, and interactive exercises for image viewing and manipulation. This book is intended for all those who work daily, regularly or even only occasionally with CT: physicians, radiographers, engineers, technicians and physicists. A glossary describes all the important technical terms in alphabetical order. The enclosed DVD again offers attractive case studies, including many examples from the most recent 64-slice acquisitions, and interactive exercises for image viewing and manipulation. This book is intended for all those who work daily, regularly or even only occasionally with CT: physicians, radiographers, engineers, technicians and physicists. A glossary describes all the important technical terms in alphabetical order.

Download or read book Imaging of Adipose Tissue in Bone and Muscle Implications for Osteoporosis Sarcopenia and Frailty written by Ling Wang and published by Frontiers Media SA. This book was released on 2023-08-25 with total page 127 pages. Available in PDF, EPUB and Kindle. Book excerpt: The quantitative assessment of adipose tissue in bone and muscle is of increasing interest in musculoskeletal research and routine in relation to osteoporosis, sarcopenia, fractures, over-/under-nutrition states, as well as frailty. However, imaging approaches to assess myosteatosis and bone marrow adipose tissue (BMAT) are still challenging, i.e., different fat depots (intermuscular, intramuscular, and intramyocellular fat) may represent different risk factors to metabolic health and muscle function but the segmentations of muscle and adipose tissue vary significantly, and MRI (the reference imaging tool for BMAT) faces challenges in the accuracy and precision of BMAT quantification. In addition, the studies of BMAT fatty acid composition in vivo are growing interests but limited by the estimation accuracy of advanced imaging methods like Magnetic Resonance Spectroscopy or chemical shift encoding-based water-fat imaging (WFI) techniques. Furthermore, identifying the effects of adipose tissue on bone and muscle would give new insights into the pathophysiology of sarcopenia, osteoporosis and frailty and also improve our understanding of intervention.

Download or read book Radiation Oncology written by Jiade J. Lu and published by Springer Science & Business Media. This book was released on 2008-11-23 with total page 658 pages. Available in PDF, EPUB and Kindle. Book excerpt: Radiation Oncology: An Evidence-Based Approach (ROEBA) is a reference book designed to enable radiation oncologists, including those in training, to make diagnostic and treatment decisions on the basis of the best available scientific evidence. Ease of use is ensured by a structured, reader-friendly format that offers rapid access to evidence-based recommendations. ROEBA’s orientation is entirely practical, in that the focus is solely on diagnostic/staging and treatment issues. Detailed diagnostic and therapeutic guidelines are provided for multidisciplinary cancer management as well as radiation therapy techniques. The evidence underlying each recommendation is clearly and concisely explained, and the strength of the recommendations and evidence is systemically graded. Furthermore, diagnostic and treatment algorithms are provided for the commonly diagnosed cancers. This ground-breaking text on radiation oncology is an essential tool for physicians in their daily clinical practice.

Download or read book Computed Tomography E Book written by Euclid Seeram and published by Elsevier Health Sciences. This book was released on 2022-06-16 with total page 538 pages. Available in PDF, EPUB and Kindle. Book excerpt: Build the foundation necessary for the practice of CT scanning with Computed Tomography: Physical Principles, Patient Care, Clinical Applications, and Quality Control, 5th Edition. Written to meet the varied requirements of radiography students and practitioners, this two-color text provides comprehensive coverage of the physical principles of computed tomography and its clinical applications. The clear, straightforward approach is designed to improve your understanding of sectional anatomic images as they relate to computed tomography and facilitate communication between CT technologists and other medical personnel. - Chapter outlines and chapter review questions help you focus your study time and master content. - NEW! Three additional chapters reflect the latest industry CT standards in imaging: Radiation Awareness and Safety Campaigns in Computed Tomography, Patient Care Considerations, and Artificial Intelligence: An Overview of Applications in Health and Medical Imaging. - UPDATED! More than 509 photos and line drawings visually clarify key concepts. - UPDATED! The latest information keeps you up to date on advances in volume CT scanning; CT fluoroscopy; and multislice applications like 3-D imaging, CT angiography, and virtual reality imaging (endoscopy).

Download or read book Hip Arthroscopy and Hip Joint Preservation Surgery written by Shane J. Nho and published by Springer Nature. This book was released on 2022-08-01 with total page 1874 pages. Available in PDF, EPUB and Kindle. Book excerpt: The field of hip preservation surgery has evolved over the past decade as our understanding of hip pathomechanics and pathomorphology has expanded. The published literature on non-arthritic hip pathology, for example, has grown exponentially. The topics of controversy in the past decade have been answered in some cases, but new questions have also arisen. In addition to the 99 chapters in the original edition – most of which will be retained and updated as applicable – there will be over 30 brand new chapters focusing on new and more sophisticated techniques from authors that have been the pioneers of the field. The text is divided into nine thematic sections, covering the breadth of the topic and the current state of the art: basic science of the hip; operative basics for hip arthroscopy and open hip preservation surgery; pediatric hip conditions; approaches to disorders of the hip and pelvis; enthesopathy and neuromuscular disorders; hip fractures and instability; avascular necrosis; hip cartilage restoration; and oncologic conditions. Throughout, there is a heavy emphasis on surgical techniques, and video clips will be included in selected chapters. Written by edited by thought leaders and seasoned practitioners in the field, this new edition of Hip Arthroscopy and Hip Joint Preservation Surgery will remain the gold standard for orthopedic surgeons and sports medicine specialists, expanding on the range of techniques available to clinicians treating injuries to and disorders of the hip.

Download or read book The Handbook of Medical Image Perception and Techniques written by Ehsan Samei and published by Cambridge University Press. This book was released on 2018-12-13 with total page 1478 pages. Available in PDF, EPUB and Kindle. Book excerpt: A state-of-the-art review of key topics in medical image perception science and practice, including associated techniques, illustrations and examples. This second edition contains extensive updates and substantial new content. Written by key figures in the field, it covers a wide range of topics including signal detection, image interpretation and advanced image analysis (e.g. deep learning) techniques for interpretive and computational perception. It provides an overview of the key techniques of medical image perception and observer performance research, and includes examples and applications across clinical disciplines including radiology, pathology and oncology. A final chapter discusses the future prospects of medical image perception and assesses upcoming challenges and possibilities, enabling readers to identify new areas for research. Written for both newcomers to the field and experienced researchers and clinicians, this book provides a comprehensive reference for those interested in medical image perception as means to advance knowledge and improve human health.