'has been modified so' is correct and usable in written English.
You can use it when you want to emphasize that a process or result has changed through modification. For example: The recipe for this dish has been modified so that it now includes vegan alternatives.
It has been modified so as to not actually start the transmitter when called, thereby saving power.
The transmit ISR, this interrupt routine has been modified so as to shut down the transmitter once the last byte has been successfully sent over the UART.
axbary has been modified so that the XPOSUR9 header keyword will be properly set for datasets containing the ACIS-9 chip.
Now the system has been modified so that fetuses can be on a waiting list, but in a different category than already born pediatric patients.
The copyright law has been modified so extensively in the past decades that now this essentially never happens, creating absurdities whenever copyright is invoked.
With the design of an appropriate temperature control system, the CT unit has been modified so that the structure of intact frozen soil samples can be investigated.
Simulations of dense melts of coarse-grained chains have been modified so that they contain filler particles.
Mr. Richards added that the schedule of the show had been modified so that Mr. Piven could attend the Golden Globes Awards ceremony in Los Angeles on Sunday.
Alternatively, the alarm could have been modified, so that once it operated the light stayed on until reset by the operator.
Only a few thousand have been modified so far, the Treasury says, though the department has signed contracts with the nation's five largest mortgage servicers obliging them to consider modifying delinquent loans.
Australia's Joint Agency Coordination Centre JACCC) said a decision had been made to suspend drone operations during winter but that plans had been modified so the search could continue and an expanded 120,000 square-kilometre area could be scoured.
