Photographic Quality Assurance in Diagnostic Radiology, Nuclear Medicine, and Radiation Therapy: The basic principles of daily photographic quality assuranceU.S. Department of Health, Education, and Welfare, Public Health Service, Food and Drug Administration, Bureau of Radiological Health, 1976 - Diagnosis, Radioscopic - 98 pages |
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Page 19
... Average reading- 1.00 Average difference 0.01 Now read the center of your secondary standard density patch mounted in the file cards . Again make three readings and take the average . Example : Densitometer readings : 0.95 , 0.97 , 0.96 ...
... Average reading- 1.00 Average difference 0.01 Now read the center of your secondary standard density patch mounted in the file cards . Again make three readings and take the average . Example : Densitometer readings : 0.95 , 0.97 , 0.96 ...
Page 35
... Average Average Wedge = 1 Wedge # 2 Wedge # 1 Wedge # 2 Temperature Base - plus - fog Medium Density Den . Difference DATA SUMMARY 199 Plot the data for each of the parameters (. Wedge # 3 Average Wedge # 1 Wedge # 2 Wedge # 3 Average ...
... Average Average Wedge = 1 Wedge # 2 Wedge # 1 Wedge # 2 Temperature Base - plus - fog Medium Density Den . Difference DATA SUMMARY 199 Plot the data for each of the parameters (. Wedge # 3 Average Wedge # 1 Wedge # 2 Wedge # 3 Average ...
Page 53
... average the B + F , MD , and DD for the three strips of the new emulsion batch for each processor . Subtract the average old emulsion values from the average new emulsion values to obtain the difference . Take the average of the ...
... average the B + F , MD , and DD for the three strips of the new emulsion batch for each processor . Subtract the average old emulsion values from the average new emulsion values to obtain the difference . Take the average of the ...
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addition average base-plus-fog level bulb calibration step tablet changes chemicals chemistry clinical films contaminated contrast control emulsion control limits corrective action curve darkroom decrease density difference developer replenisher developer tank developer temperature Diagnostic Radiology exposure hand processing increase indicated maintain manufacturer medium density necessary neutral density filters normally nuclear medicine operating levels optimization optimum parameters patch sensitometric step photographic film photographic materials photographic processing photographic quality assurance procedures processing conditions processing control charts processing racks processor maintenance log quality assurance program radiation therapy radiographic film radiographic materials radiographic processing Radiological Health radiology department reading recommended replenisher tanks replenishment rate residual fixer safelights Sample control charts sensi strip sensitometric control strip sensitometric step tablet sheets speed speed film step wedge suspect film systems cleaner technique technologist thermometer three patch sensitometric type of film type of sensitometer variability visual densitometer x-ray