Kettering SEMINAR first part Questions With Complete Solutions

Those factors that affect the amount of exposure reaching the radiographic image receptor correct answer: Photographic Factors Those factors that affect the degree of divergence of x-ray beam and the information recorded on the radiograph image receptor Recorded detail (spatial resolution) & distortion (misrepresentation) correct answer: Geometric Factors is defined as the difference in pixel brightness intensities on adjacent areas of the radiographic image correct answer: Radiographic contrast Amount of radiation that reaches the IR Determine the blackness of the image correct answer: Receptor Exposure quatum mottle correct answer: Grainy appearance and grossly under exposure Saturation correct answer: Over exposure and darker image, gross over exposure Direct Relationship Reciprocity Law Is the direct controlling factor of radiographic receptor exposure. Receptor exposure varies DIRECTLY with mAs. As mAs increases, radiographic receptor exposure increase proportionally (decrease mAs, decrease receptor exposure) correct answer: mAs There is no change on spatial resolution. No relation - according to the ARRT correct answer: Does an increase in mAs increase spatial resolution? 200 MS , .02 second and the move the decimal 3 to the right. 1/5 in fraction correct answer: If mAs is 20 and mA is 100, what is the time in milliseconds? Shorter time correct answer: Shorter or longer time for someone who has trouble with invluntary motion The receptor exposure on a radiographic is proportional only to the total energy imparted to the radiographic image receptor mAs1 = mAs2 This relationship will fail when the receptor exposure times are less than 10 mses or longer that 5sec) correct answer: Reciprocity law Is for adjusting mAs to compensate for changes changes in source to image receiver distance so as to keep radiographic receptor exposure constant mAs1 = Original Milliampere seconds value mAs2 = Resultant Milliampere second value correct answer: