'Grid ratio' presentation slideshows

Portable Mobile Equipment and Applications

609 views • 52 slides

RADIOGRAPHIC GRIDS

RADIOGRAPHIC GRIDS. GRIDS. INVENTED BY DR. GUSTAV BUCKY. GRIDS. DEVICES THAT REDUCE THE AMOUNT OF SCATTERED RADIATION REACHING THE IMAGE RECEPTOR. GRIDS DO NOT REDUCE THE AMOUNT OF SCATTER RADIATION REACHING THE IMAGING PERSONNEL. GRIDS DO INCREASE RADIATION EXPOSURE OF PATIENTS.

7.85k views • 50 slides

Grids

Grids. RTEC 244. Dr. Gustave Bucky. Since Dr. Gustav Bucky built the first grid in 1913, his original principle of lead foil strips standing on edge separated by x-ray transparent interspacers has remained one of the best-known techniques to trap the scatter.

2.46k views • 47 slides

CR Image Acquisition

CR Image Acquisition. By Professor Stelmark.

540 views • 37 slides

CR Image Acquisition

CR Image Acquisition. By Professor Stelmark.

573 views • 37 slides

RA 111 RADIOGRAPHIC IMAGING II

RA 111 RADIOGRAPHIC IMAGING II. CONTROL OF SCATTER RADIATION. SCATTER RADIATION. DEFINITION: THREE INTERACTIONS PASSES THROUGH ABSORBED SCATTERS. INFLUENCING FACTORS. VOLUME OF TISSUE Volume = tissue thickness and area exposed Increase thickness = increase scatter

730 views • 28 slides

Radiographic Grids II

Radiographic Grids II. By Professor Stelmark. Ideally, grids would absorb all scattered radiation and allow all transmitted photons to reach the image receptor. In reality, however, some scattered photons pass through to the image receptor and some transmitted photons are absorbed.

1.13k views • 27 slides

Image Production and Evaluation

Image Production and Evaluation. NOTE: QA AND QC ARE USED INTERCHANGABLY IN APPLETON AND LANGE. Intensifying screen (ref: pg 59 Mosby, 190 Bushong) . Base Reflective layer Active Layer Protective layer. Intensifying.Screen: Detail and speed.

842 views • 22 slides

SCATTER AND GRIDS

SCATTER AND GRIDS. Chapter 6, Fauber Supplement-Chapter 14, Bushong. REVIEW:MATTER OR TUBE INTERACTION?. Bremsstrahling Characteristic Coherent Compton Exit/remnant Infrared Photoelectric. Scatter. Which interaction causes scatter? What factors increase scatter?

340 views • 16 slides

RAD 354 Chapt . 11 Control of Scatter

RAD 354 Chapt . 11 Control of Scatter. Break down into: Those that reduce pt. dose and those that are geometrical in nature and those NOT! 3 factors affecting scatter (primary) Increased kVp Increased field size Increased pt. thickness. Spatial Resolution & Contrast Resolution.

249 views • 15 slides

4: Contrast and Scatter

mAs. 4: Contrast and Scatter. The key concepts in radiological imaging necessary to acquire the best possible images are: 1: Minimise patient dose 2: Maximise signal to noise ( quantum mottle) eg. high intensity beam High mA

261 views • 8 slides