Understand Medical Imaging: X-Ray, Fluoro, CT & Angiography

Learn the fundamentals of x-rays and medical imaging, including radiography, digital radiography, CT, RF, and cardiovascular imaging. Understand ionizing versus non-ionizing radiation, dose, and radiation protection.

Trace the 1895 discovery of x-rays by Rankin, the Crookes tube, and the first radiograph of a hand, then follow early x-ray tubes and systems.

Explore the double-edged nature of ionising radiation, showing how x-rays damage tissue, trigger malignancies and radiation sickness, and threaten sensitive organs like brain, thyroid, lungs, and bone marrow.

Analyze how ionizing radiation, especially x-rays, enables medical imaging while risking DNA damage and cancer. Learn dose units like rads, grays, and sieverts and their clinical implications.

Protect patients and radiographers by minimizing exposure through time, distance, and shielding. Learn about dosimeters, shielding devices, and regulatory frameworks like ALARA, image wisely, image gently, and clinically appropriate studies.

Discover how the x-ray tube converts electricity into x-rays via the cathode and tungsten anode. Understand heat management with a rotating anode and oil bath, and automatic exposure control.

Discover the fundamentals of radiographic systems, from the x-ray generator to film-screen and computed radiography, and compare CR and DA digital workflows in modern imaging.

Learn how screen film exposures use cassette-based detectors and intensifying screens to convert x rays into visible images, and compare film screen detectors with digital radiography and other detectors.

Maximize image quality by geometric magnification concepts, keep the patient close to the detector, and use bucky grids to minimize scatter, while choosing focal spots and exposure control.

computed radiography replaces the film screen with a special imaging plate, enabling digital readout, post-processing, and reduced retakes due to a linear detector and adjustable sensitivity.

Explore digital radiography, from cassette-based cr to permanent detectors, including cesium iodide and dynamic imaging, and assess productivity gains and cr/dr coexistence.

Highlight three clinical applications of the static digital detector: the mobile surgical c-arm with wheels and an image intensifier, mammography with a compressor, and dental x-ray with panoramic imaging.

Explore fluoroscopy and dynamic x-ray imaging, comparing image intensifiers and modern digital detectors, and learn barium contrast studies for the GI tract, biliary system, blood vessels, and orthopedics.

Explore image processing basics for medical imaging, covering bits and bytes, grayscale, spatial and contrast resolution, digital zoom, JPEG compression, filters like high pass, and image stitching.

Digitize analog radiographs to digital grayscale by assigning each pixel a 0–255 value, and explain how resolution and color affect storage and network transfer.

Explore how spatial resolution and contrast resolution shape medical images by adjusting pixel counts and bits, balancing detail, diagnostic utility, and data size.

Explore how image compression lowers medical image sizes with compression ratios, balancing network throughput, storage needs, and diagnostic quality to create a defensible diagnostic image.

Learn how spatial filters and contrast stretching sharpen medical images, balancing high-pass detail, low-pass smoothing, and look-up table mapping within anatomically programmed radiography for chest, skull, and scoliosis imaging.

Explore cardiovascular imaging systems, including ceiling- and floor-mounted C arms, x-ray tubes, digital detectors, and real-time monitors guiding dynamic studies.

Learn how dye-enhanced cardiovascular imaging reveals the aortic arch and coronary arteries, guiding catheter placement, angioplasty, stents, and ejection fraction assessment.

Explore digital dynamic detectors for cardiovascular imaging, using cesium iodide, photodiodes, and amorphous silicon, balancing small high-speed heart imaging with large chest image capabilities and detector costs.

Learn how computed tomography (CT) systems use a pencil beam of X-rays, detectors, and computer reconstruction to produce fast, multi-slice, 3D views of the body.

Demonstrate 3d ct data sets and volumetric rendering from helical scans to visualize surfaces, bones, tissues, and angiography, with Pixar collaborations enabling advanced imaging.

Celebrate completing the course and apply the tools and skills you learned; continue using them as you pursue future endeavors.