Electromagnetic Radiation in Medical Imaging

The primary reason for differential absorption is due to the difference in density and atomic number of various body parts.

The intensity of the x-ray beam is halved for every 5cm of tissue it passes through.

A side-marker is used to identify the correct side (left or right) of the radiographic image.

<p>High contrast produces sharper differences with fewer grey scales, while low contrast produces more grey scales with smaller differences.</p> Signup and view all the answers

<p>A collimator is used to move the light beam diagram to change the field of view (FOV).</p> Signup and view all the answers

<p>CR uses phosphor plates, while DR uses flat-panel detectors.</p> Signup and view all the answers

<p>Electromagnetic radiation travels in straight lines until it interacts with matter, at which point energy is transferred.</p> Signup and view all the answers

<p>Electrical energy is used to control the console, while electromagnetic energy is produced at the anode to generate X-rays.</p> Signup and view all the answers

<p>The resulting image is called a latent image, and it is processed using chemical energy to produce a 2D X-ray image.</p> Signup and view all the answers

<p>Compton scatter is an interaction between X-rays and outer electrons, resulting in scattered X-rays that change direction and lose energy, creating image noise.</p> Signup and view all the answers

<p>The three main interactions are Compton scatter, photoelectric absorption, and transmission, which scatter, absorb, and transmit the X-ray beam, respectively.</p> Signup and view all the answers

<p>Less than 1% of the primary beam reaches the image receptor, and only 0.5% of it interacts to create the final image.</p> Signup and view all the answers