eBook - ePub
Fundamental Mathematics and Physics of Medical Imaging
Jack Lancaster, Bruce Hasegawa
This is a test
- 322 páginas
- English
- ePUB (apto para móviles)
- Disponible en iOS y Android
eBook - ePub
Fundamental Mathematics and Physics of Medical Imaging
Jack Lancaster, Bruce Hasegawa
Detalles del libro
Vista previa del libro
Índice
Citas
Información del libro
Authored by a leading educator, this book teaches the fundamental mathematics and physics concepts associated with medical imaging systems. Going beyond mere description of imaging modalities, this book delves into the mechanisms of image formation and image quality common to all imaging systems: contrast mechanisms, noise, and spatial and temporal resolution, making it an important reference for medical physicists and biomedical engineering students. This is an extensively revised new edition of The Physics of Medical X-Ray Imaging by Bruce Hasegawa (Medical Physics Publishing, 1991), and includes a wide range of modalities such as X-ray CT, MRI and SPECT.
Preguntas frecuentes
¿Cómo cancelo mi suscripción?
¿Cómo descargo los libros?
Por el momento, todos nuestros libros ePub adaptables a dispositivos móviles se pueden descargar a través de la aplicación. La mayor parte de nuestros PDF también se puede descargar y ya estamos trabajando para que el resto también sea descargable. Obtén más información aquí.
¿En qué se diferencian los planes de precios?
Ambos planes te permiten acceder por completo a la biblioteca y a todas las funciones de Perlego. Las únicas diferencias son el precio y el período de suscripción: con el plan anual ahorrarás en torno a un 30 % en comparación con 12 meses de un plan mensual.
¿Qué es Perlego?
Somos un servicio de suscripción de libros de texto en línea que te permite acceder a toda una biblioteca en línea por menos de lo que cuesta un libro al mes. Con más de un millón de libros sobre más de 1000 categorías, ¡tenemos todo lo que necesitas! Obtén más información aquí.
¿Perlego ofrece la función de texto a voz?
Busca el símbolo de lectura en voz alta en tu próximo libro para ver si puedes escucharlo. La herramienta de lectura en voz alta lee el texto en voz alta por ti, resaltando el texto a medida que se lee. Puedes pausarla, acelerarla y ralentizarla. Obtén más información aquí.
¿Es Fundamental Mathematics and Physics of Medical Imaging un PDF/ePUB en línea?
Sí, puedes acceder a Fundamental Mathematics and Physics of Medical Imaging de Jack Lancaster, Bruce Hasegawa en formato PDF o ePUB, así como a otros libros populares de Medicina y Radiologia, radioterapia e medicina nucleare. Tenemos más de un millón de libros disponibles en nuestro catálogo para que explores.
Información
II
Intermediate Concepts
CHAPTER4
Physical Determinants of Contrast
A MEDICAL IMAGE CAN BE roughly described in terms of the three basic features given in Chapter 1: contrast, spatial resolution, and noise. Spatial resolution or clarity refers to the spatial detail of small objects within the image. Noise refers to the precision within the image; a noisy image will have large fluctuations in the signal across a uniform object, while a precise signal will have very small fluctuations. The subject of this chapter, contrast, relates to the difference in signals between a structure and its immediate surroundings. For example, if circles are displayed against a black background, a white circle will have larger contrast relative to the background when compared to gray circles (Figure 4.1). One uses the differences in gray shades to “visually” distinguish different tissue types, determine anatomical relationships, and sometimes assess their physiological functions. The larger the contrast between different tissue types, the easier it is to make distinctions clinically. It is often the objective of an imaging system to maximize the contrast in the image for a particular object or tissue of interest, although this is not always true since there may be design compromises where noise and spatial resolution are also very important. The contrast in an x-ray image depends on both physical characteristics of the object and properties of the device(s) used to image the object. The focus of this chapter is x-ray image contrast and we discuss the physical determinants of contrast, including material properties, x-ray spectra, detector response, and the role of perturbations such as scatter radiation and image intensifier veiling glare. We include physical determinants of contrast for several other medical imaging modalities, including those used in nuclear medicine, magnetic resonance imaging, and computed tomography to round off the discussion.
4.1COMPONENTS OF X-RAY IMAGE CONTRAST
Contrast can be quantified as the fractional difference in a measurable quantity between adjacent regions of an image. Usually, when we say “contrast,” we mean image contrast, which is the fractional difference in signals between two adjacent regions of an image. In conventional radiography, contrast can be separated into three components: (1) radiographic contrast, (2) detector contrast, and (3) display contrast (Table 4.1 and Figure 4.2).
Índice
- Cover
- Half Title
- Title
- Copyright
- Table of Contents
- Series Preface
- Preface
- Acknowledgments
- Author
- Introduction
- Section I Basic Concepts
- Section II Intermediate Concepts
- Section III Advanced Concepts
- Section IV Dynamic Imaging
- Section V Tomographic Imaging
- Index
Estilos de citas para Fundamental Mathematics and Physics of Medical Imaging
APA 6 Citation
Lancaster, J., & Hasegawa, B. (2016). Fundamental Mathematics and Physics of Medical Imaging (1st ed.). CRC Press. Retrieved from https://www.perlego.com/book/2051498/fundamental-mathematics-and-physics-of-medical-imaging-pdf (Original work published 2016)
Chicago Citation
Lancaster, Jack, and Bruce Hasegawa. (2016) 2016. Fundamental Mathematics and Physics of Medical Imaging. 1st ed. CRC Press. https://www.perlego.com/book/2051498/fundamental-mathematics-and-physics-of-medical-imaging-pdf.
Harvard Citation
Lancaster, J. and Hasegawa, B. (2016) Fundamental Mathematics and Physics of Medical Imaging. 1st edn. CRC Press. Available at: https://www.perlego.com/book/2051498/fundamental-mathematics-and-physics-of-medical-imaging-pdf (Accessed: 15 October 2022).
MLA 7 Citation
Lancaster, Jack, and Bruce Hasegawa. Fundamental Mathematics and Physics of Medical Imaging. 1st ed. CRC Press, 2016. Web. 15 Oct. 2022.