1. GROUP 4 Garrett Robak Griffin Walker Kristin Innocenzi Mohammed Javed Noel Baquilod Suzanne James O I D Magnification and S I D
2. Our Objective was to demonstrate the direct relationship between OID and magnification, and the adjustments in SID and technique needed to compensate for increased OID OBJECTIVE
3.
4.
5. PROCEDURE Using the phantom a series of four images of the right hand were taken. Exposure 2 - Radiographic Table EXPOSURE 2 Position the hand of the phantom lengthwise on top of a vertical row of sponges measuring 8 inches. Secure the hand of the phantom to the sponge using tape to ensure it is flat on top of the sponges and place a 10 X 12 lengthwise cassette underneath of the sponges. Maintain a 40’ SID, direct central ray to the 3 rd metacarpal and use proper markers R, 2. Keep all technique factors (KVP, MA and Time) constant on the control panel. Take exposure, process the film in the darkroom, and refill cassette with a new film.
6.
7. PROCEDURE Exposure 4 - Floor EXPOSURE 4 Maintain the same position as Exposure 3. Align x ray tube to the cassette and center the central ray to the 3 rd metacarpal. Maintain the same SID as Exposure 3. Mark cassette with proper markers R, 4. Keep the same KVP, but adjust the MAS to account for the OID of 8 inch that the sponge has created. Take exposure, process the film in the darkroom, and refill cassette with a new film.
12. References: 1. Selman J. The Fundamentals of X-Ray and Radium Physics .4th Ed. Springfield Il: Charles C. Thomas, Publisher; 1965 2. Laver OG, Mayes JB, Thurston RP. Evalutating Radiographic Quality Mankato MN: The Burnell Co.; 1990 3. Saia DA. Radiography Examination. 7th Ed. McGraw-Hill Companies Inc; 2008 4. Bushberg JT. The Essential Physics of Medical Imaging Philadelphia PA: Lippincott, Williams & Wilkins; 2002
