The phrase "altered through a" is correct and usable in written English.
It can be used when describing a process or method by which something is changed or modified.
Example: "The data was altered through a series of complex algorithms to improve accuracy."
Alternatives: "modified by a" or "changed via a".
The sound quality can be altered through a few settings.
Once the sovereign status quo has been altered through a popular vote, it is uncommon for another to be organized.
Instead of a being static target, success criteria can be altered through a process termed Adaptive Management.
A series of graders examine each stone to document its distinguishing qualities and determine whether its color has been altered through a chemical process.
We propose that a histidine plays the role of the acid/base, whose state is altered through a charge-relay system involving a novel His-Tyr-Glu triad.
Predictably, the proposal stimulated more outrage than fresh thought, though many of Firestone's ideas — children's rights, an end to "male" work and traditional marriage, and social relations altered through a "cybernetic" computer revolution — have proved prescient.
Utilising the largest sample size to date, this study had a clear hypothesis that callus progression could be altered through lengthening over an intramedullary nail and they were able to prove this in their sample group.
A study of the subjective aesthetic impact is then carried out using the semantic differential method, to obtain the perception of a sample of individuals of the initial landscapes and of the landscapes altered through the installation of a solar power plant.
The subcellular distribution of TAT-SA is significantly altered through the incorporation of a pH-sensitive polymer PPAA.
Rembrandt, too, offered Bacon a model of a reality altered through miraculous technique, where textured flesh and contrasts of light and shade are created by a rich, sombre palette and extravagant impasto.
