Thank you , Mons.
For this one , i tried to do it. I put the image in remove.bg but there was still a black lump of the background , to the right of the doctor ' s left cheek.
How did you do ?
Because i tried to erase this little black piece manually pixel by pixel with the eraser but the result was very average so i did not download it.

@mons

That is exactly what I did too tbh. You should change the size of the eraser so that you can be as precise as possible, I find that having it 6 pixels in size is sufficient. If you zoom in on the are of the cut, you can usually erase the excess bits in a realistic manner, like I did, without the final cut looking odd or 'wrong'.

@mons
Ok thanks for your answer , i was curious to know. I admit that i did not persevere too much.
I thought there was an easier solution with photoshop. I wanted to try by putting a black background then deleting it but i saw that you had finished it.
Suddenly , i have not tried and i had already deleted this image.
Well i think that it should not work otherwise you would have surely done it.