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- Image Quality Penetrameters / IQI's
- Ray Check ASTM E-801 Penetrameters / IQIs
ASTM E 801 Electronic IQI's are fabricated of clear acrylic plastic with Stainless Steel covers, lead particles (spheres), tungsten wires and lead identification numbers. The stainless steel covers serve as shims. The IQI's are used in such a manner as to simulate as closely as possible the device being examined. To accomplish this, a set of eight IQI's is specified. These provide a range of cover thickness (of stainless steel shims) that is radiologically equivalent to the range of devices from glass diodes or plastic-encapsulated circuits (IQI # 1) to large power or hybrid circuit devices (IQI # 8). Wire size increases with shim thickness. Higher power devices are radiologically compatible with the thicker coverings, because they use interconnecting wires that are large. Small signal devices are compatible with thin coverings. Particle size is normally independent of device type, so these remain constant.
The IQIs shall be permanently identified with the appropriate IQI number. The number shall be affixed by mounting a 0.125" (3.18mm) tall lead number on the flat bottom of a 0.250" (6.35mm) diameter hole. The identification number shall be of sufficient contrast to be clearly discernible in the radiographic image. Each IQI will have a serial number permanently etched or engraved on it. Each serial number will be traceable to the calibration image supplied by the manufacturer. The manufacturer shall radiograph the IQI with lead markers identifying the serial number.
| Dimensions | |||||
| a | 0.187" (4.750 mm) |
f | 1" (25.4 mm) | k | 1.125" (28.575 mm) |
| b | 0.375" (9.525 mm) |
g | 0.375" (9.525 mm) |
l | 1.313" (33.35 mm) |
| c | 0.5" (12.7 mm) |
h | 0.5" (12.7 mm) |
m | 1.5" (38.1 mm) |
| d | 0.625" (15.875 mm) |
i | 0.625" (15.875 mm) |
n | 0.125" (3.175 mm) |
| e | 0.813" (20.65 mm) |
j | 0.938" (23.825 mm) |
p | 0.25" (6.35 mm) |
| Particle Diameter | |||
| G | 0.015" (0.381 mm) |
J | 0.006" (0.152 mm) |
| H | 0.01" (0.254 mm) |
K | 0.004" (0.102 mm) |
| I | 0.008" (0.203 mm) |
L | 0.002" (0.051 mm) |
| IQI Number | Shim Thickness | Wire Diameters | |||||
| A | B | C | D | E | F | ||
| 1 | 0 | 0.002" (0.051 mm) |
0.001" (0.025 mm) |
0.0005" (0.0127 mm) |
0.0005" (0.0127 mm) |
0.001" (0.025 mm) |
0.002" (0.051 mm) |
| 2 | 0.002" (0.051 mm) |
0.002" (0.051 mm) |
0.001" (0.025 mm) |
0.0005" (0.0127 mm) |
0.0005" (0.0127 mm) |
0.001" (0.025 mm) |
0.002" (0.051 mm) |
| 3 | 0.005" (0.127 mm) |
0.002" (0.051 mm) |
0.001" (0.025 mm) |
0.0005" (0.0127 mm) |
0.0005" (0.0127 mm) |
0.001" (0.025 mm) |
0.002" (0.051 mm) |
| 4 | 0.007" (0.178 mm) |
0.002" (0.051 mm) |
0.001" (0.025 mm) |
0.0005" (0.0127 mm) |
0.0005" (0.0127 mm) |
0.001" (0.025 mm) |
0.002" (0.051 mm) |
| 5 | 0.01" (0.254 mm) |
0.003" (0.076 mm) |
0.002" (0.051 mm) |
0.001" (0.025 mm) |
0.001" (0.025 mm) |
0.002" (0.051 mm) |
0.003" (0.076 mm) |
| 6 | 0.015" (0.381 mm) |
0.003" (0.076 mm) |
0.002" (0.051 mm) |
0.001" (0.025 mm) |
0.001" (0.025 mm) |
0.002" (0.051 mm) |
0.003" (0.076 mm) |
| 7 | 0.025" (0.635 mm) |
0.005" (0.127 mm) |
0.003" (0.076 mm) |
0.002" (0.051 mm) |
0.002" (0.051 mm) |
0.003" (0.076 mm) |
0.005" (0.127 mm) |
| 8 | 0.035" (0.889 mm) |
0.005" (0.127 mm) |
0.003" (0.076 mm) |
0.002" (0.051 mm) |
0.002" (0.051 mm) |
0.003" (0.076 mm) |
0.005" (0.127 mm) |
Note: Serialized Radiographic products are not returnable