Thanks for the query
Looks like you are having recurrent stones which are blocking the ureter
and causing the findings of dilation of the pelvicalyceal system. You can drink plenty of water to flush out the stones.
You also need to see a urologist
for more definitive management of the stones.
Also if you are suffering from recurrent stones special blood and urine tests may be done which will determine if you have any underlying predisposing condition causing recurrent stones.
Hope this helps.