I partailly agree with considering reading patterns but these are only part of the answer. I think you need to consider the overall structure of the page in a way that is meaningful both at informational and visual levels. Equally I don't think the placement of an image or any other visual attribute should follow a rule but rather be determined by the context and the overall intention of the design.
There are two aspects that could influence how the design works:
Visual Weight- The perceived weight of a visual element. It’s a
measure of how much anything on the page attracts the eye of your
Visual Direction – The perceived direction of the visual forces. It’s
the direction we think an element should be moving if it was given a
chance to move based on the forces acting on it.
There are a number of useful factors to consider when dealing with each of these aspects, for more details, I highly recommend reading the 19 Factors That Impact Compositional Balance. below is an example:
Incorporating visual weight and direction in your design also allows you to optimise your design for eye movements. There is an interesting article about
Understanding the Split Layout in Web Design, which you could find useful.
This might seem a lot to go through but most designers do that naturally so what matters the most here is being both explicit and critical of your own design decisions.
Hope that helps