Endterm Flashcards
A __ should be created and reviewed at least annually . The manual should include the facility’s objective, qc instruction, qc results, and presonnel responsibility
Qc manual
Items that should be included in a qc manual
List of test to be performed and the frequency of each test includong acceptable test limits, test procedures, maintenance and service records
List of equipment to be used for testing.
Policy and procedures for qc test as well as for the facility
Sample forms
Recommended QC test for podiatrics facilities
Test, frequency procedure
Processor qc
Darkroom qc
System constancy check
Viewboxes
Visual checklist
Repeat analysis
Film and chemical storage
Artifact evaluation
Cassettes and screens
Darkroom fog
Screen-film contact
Collimation test
Sid indication
Lead apron check
Program review
Radiation safety survey
Daily, prior to developing films and after service 1
Daily and weekly 2
Monthly and after service 3a, 3b
Monthly 4
Quaterly and after service 5
Quaterly 6
Quaterly 7
Quaterly 8
Quaterly or semiannually (as needed) 9
Semiannually 10
Annually and as needed 11
Annually 12
Annually 13
Annually 14
Annually form 6
Two years form 4
Processor qc (sensitometry)
Objective
To determine if processor is working optimally
Processor qc (sensitometry)
Suggested performance criteria
0.15 optical density of the mid-density step
0.15 optical density of the density difference
+0.3 optical density of the base + fog level
Processor qc sensitometry
Frequency
Daily prior to processing patient films
Processor qc sensitometry
Required equipment
Sensitometer
Dedicated box of control film
Densitometer
Processor qc sensitometry
Steps
- Expose the control film with sensitometer
- Develop film
- Determine the average optical density of the mid-density step and record on form b1 in appendix b
- Determine the average optical density difference and record
- Measure the background optical density (base+fog) and record
- Verify that the measured values are within the suggested performance criteria
Processor qc sensitometry
Corrective actions
Test should be repeated if the values are outside the peformance criteria. IF after repeating the result are still out of limits look for processing problems and contact thr processor service supplier
If asymmetric film is being used a dual sided sensitometer is necessary
For detailed instruction chart and example please see appendix b.
Is used to measure the characteristic curve of radiographic films exposed with fluorescent intensifiying screens.
X-ray sensitometer
Is a representation of response of a screen film radiograph to light. The characteristic curve represents the change in optical density (OD) of the screen film in response to changing exposure (incident x-rays on the screen film). It is used to describe the contrast characteristic of a photographic film for a particular range of exposure
H and D curve ( hurter and driffield curve)
A device used to measure sensitivity of photographic materials to light or radiation. Typically consist of a controlled light source that exposes a test film or sensor to varying levels of light. By measuring the resulting optical densities on the film, one can determine the sensitivity of the material to light
Sensitometer
A device used to measure optical density it quantifies how much light is absorbed or transmitted by a material. In the context of imaging, a __ is often used to measure the density of developed photographic film or other materials used in imaging procedures
Densitometer
Single panel/single screen
Luminosity
Input voltage
Power consumption
Dimensions (mm)
Weight
Light source
4k-10 lux
240V 90H
23 W
500x530x45
6.5 kg
LED
Double panel/dual screen
Luminosity
Input voltage
Power consumption
Dimensions (mm)
Weight
Light source
4k-10 lux
240V 90Hz
46W
530x850x45
9k
LED
