VIP会员
The design of the 468-bh ctdi dosage model, gammex 468-bhp dosage model, is consistent with technical specifications developed by the united states food and drug supervisory authority (fda, based on 21cfr 1020. 33 regulations) and the international electrotechnical commission (iec, based on 60601-2-44). Of these, the 468-bph model ctdi model supports the computer fault scanning dosage index (ctdi) for children and adults. In addition, the module could be used for other relevant testing projects, including ctdi100 (centre and outer perimeter), ctdiw (weighted ct dosage index), ctdivol (volume ct dosage index) and ctdi free air dosage testing。
The series of modules provides two structural specifications: 2 modules (model 468-bh) and 3 components (model 468-bhp). Both specifications consist of embedded modules, which users can adjust to the required sizes in accordance with the requirements of the detection programme used. Each module supports the user in the central axis of the module or in the outer perimeter at a depth of 1. 0 cm from the surface of the module, per 90 degrees distribution。
Ctdi phantoms supports the measurement of ct dosage indices recommended by aapm working group 66。
Central and peripheral measurements
Each module allows dosage measurements to be performed at a central axis or at a depth of 1. 0 cm from the surface, at an angle of 90 degrees
468-bh ctdi dose model, gammex 468-bhp dose model specification:
|
Materials |
Polymethyl acrylate (pmma/propylene acid) |
|
Density |
1. 19 g/cm3 |
|
Route signs |
The etching lines are centred on the horizontal, coronal and vector sides |
|
Module |
Dimensions (exterior x length) |
|
Form |
32 cm x 14. 5 cm |
|
Adult head/child body |
16 cm x 14. 5 cm |
|
Children's heads (models only 468-marrow) |
10 cm x 14. 5 cm |
|
Weight |
19. 9 kg (30. 5 pounds) |
|
Port diameter |
1. 31 cm |
468-bh ctdi dose model, gammex 468-bhp dose model qa criteria:
| Check | Reference value (volume ct dosage index, mgr) | Qualification / unqualified criteria (volume ct dosage index, mgr) |
|---|---|---|
| Adult head | 75 | 80 |
| Adult abdominal | 25 | 30 |
| Child head (1 year) | 35 | 40 |
| Children's abdomen (40-50 pounds) - 16 cm mold | 15 | 20 |
| Children's abdomen (40-50 pounds) - 32 cm simulator | 7. 5 | 10 |