RADD 2501 Lab Experiment 1

RADD 2501 Lab Experiment 1 - 1/3 of the film and take...

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EXPERIMENT #1 mA/Density Using the phantom and a 10 x 12 ” cassette, follow the steps to take three different exposures on the same film PURPOSE: To prove the effect of increasing milliamperage on radiographic density. The factor that will be changed in each of the three exposures is milliamperage . The kVp and the exposure time will remain constant. INSTRUCTIONS: Collimate to 1/3 of a 10 x 12” cassette and use the rubberized lead to shield the remaining 2/3. Center the central ray to the center of the film space. THEN center the phantom to the central ray (prepare the place before you put the part in it). Take the first exposure with the factors listed below. You will continue to collimate to
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Unformatted text preview: 1/3 of the film and take exposures until all of the factors are completed. Milliamperage X Exposure Time = mAs kVp SID 1. 75mA X 0.010 = 0.8 50 40 2. 150mA X 0.010 = 1.5 50 40 3. 250mA X 0.010 = 2.5 50 40 PROCESS THE RADIOGRAPH. PLACE THE RADIOGRAPH ON A VIEWBOX AND ANSWER THE FOLLOWING QUESTIONS: 1. What happens to the cathode filament as mA increases? 2. What happens to the number of electrons produced when mA is increased? 3. What happens to the number of x-rays produced when mA is increased? 4. How is radiographic density related to milliamperage? 5. Did the mAs change when the mA changed? Why? 6. How is radiographic density related to mAs? 6...
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This note was uploaded on 11/22/2011 for the course RADD 2501 taught by Professor Sandyeverage during the Winter '11 term at Life Chiropractic College West.

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