|
Facts |
GPR |
Radiography |
|
Transmission |
High frequency radio waves |
Gamma rays |
|
Radiation hazard |
No |
Yes |
|
Evacuate people |
No |
Yes 100' in all directions |
|
Need access to both sides |
No |
Yes |
|
Consumables |
No |
Yes film |
|
License required |
No |
Yes |
|
Interference during business hours |
No |
Yes |
| Slab on grade |
Yes |
No |
|
Walls on foundation grade |
Yes |
No |
|
On site results |
Yes |
No |
|
Depth determination |
Yes 30" depth |
With calculation 16" depth |
|
Large scan areas |
Continuous 96" x 96" |
Multiple exposure 14" x 17" |
|
Cost |
Least expensive |
Most expensive |
|
Persons required |
1 |
Multiple, 2 for xray, need security |