复旦大学上海医学院：《医学影像学》PPT教学课件_介入 Introduction to Interventional Radiology

Introduction to Interventional Radiology Chis. Zee. MD Professor of radiology and Neurosurg Director of International Education and Research USC Keck School of medicine

Introduction to Interventional Radiology Chi S. Zee, MD Professor of Radiology and Neurosurgery Director of International Education and Research USC Keck School of Medicine

X-ray X rays were discovered in 1895 by W.C Roentgen, who called them X rays because their nature was at first unknown; they are sometimes also called roentgen

X-ray X rays were discovered in 1895 by W. C. Roentgen, who called them X rays because their nature was at first unknown; they are sometimes also called Roentgen

X-ray X-ray is invisible, highly penetrating electromagnetic radiation of much shorter wavelength(higher frequency) than visible light. The wavelength range for X rays is from less than a billionth of an inch to less than a trillionth of an inch

X-ray X-ray is invisible, highly penetrating electromagnetic radiation of much shorter wavelength (higher frequency) than visible light. The wavelength range for X rays is from less than a billionth of an inch to less than a trillionth of an inch

X-ray X rays are produced in a highly evacuated glass bulb, called an X-ray tube, that contains essentially two electrodes, an anode made of platinum, tungsten, or another heavy metal of high melting point, and a cathode. When a high voltage is applied between the electrodes streams of electrons(cathode rays)are accelerated from the cathode to the anode and produce X rays as they strike the anode

X-ray X rays are produced in a highly evacuated glass bulb, called an X-ray tube, that contains essentially two electrodes, an anode made of platinum, tungsten, or another heavy metal of high melting point, and a cathode. When a high voltage is applied between the electrodes, streams of electrons (cathode rays) are accelerated from the cathode to the anode and produce X rays as they strike the anode

X-ray Most applications of X rays are based on their ability to pass through matter. This ability varies with different substances; e.g., wood and flesh are easily penetrated, but denser substances such as lead and bone are more opaque. The penetrating power of X rays also depends on their energy. The more penetrating X rays, known as hard X rays, are of higher frequency and are thus more energetic, while the less penetrating X rays, called soft X rays, have lower energies. X rays that have passed through a body provide a visual image of its interior structure when they strike a photographic plate or a fluorescent screen: the darkness of the shadows produced on the plate or screen depends on the relative opacity of different parts of the body

X-ray Most applications of X rays are based on their ability to pass through matter. This ability varies with different substances; e.g., wood and flesh are easily penetrated, but denser substances such as lead and bone are more opaque. The penetrating power of X rays also depends on their energy. The more penetrating X rays, known as hard X rays, are of higher frequency and are thus more energetic, while the less penetrating X rays, called soft X rays, have lower energies. X rays that have passed through a body provide a visual image of its interior structure when they strike a photographic plate or a fluorescent screen; the darkness of the shadows produced on the plate or screen depends on the relative opacity of different parts of the body

What kind of X-ray? What kind of substance?

X-ray • What kind of X-ray? • What kind of substance?

X-ray In a conventional x-ray exam, a small burst of radiation is aimed at and passes through the body, recording an image on photographic film or a special image recording plate. Bones appear white on the X-ray; soft tissue shows up in shades of gray and air appears black

X-ray • In a conventional x-ray exam, a small burst of radiation is aimed at and passes through the body, recording an image on photographic film or a special image recording plate. Bones appear white on the x-ray; soft tissue shows up in shades of gray and air appears black

Meningioma Osteoma

Meningioma Osteoma

小 ultiple rryelorri

Multiple myeloma

Angiography Digital subtraction angiography (DSA) Computed tomography angiography (CTA) magnetic resonance angiography (MRA

Angiography • Digital subtraction angiography (DSA) • Computed tomography angiography (CTA) • magnetic resonance angiography (MRA)