How to remove a background and leave the subject? (2nd attempt)

[Travis Banger]

Hello all, new user here.

Please notice the enclosed images. I need to subject them to two processes, in order to prepare them for a before/after slider.

(1) Align them as precisely as possible. I already found out about setting the opacity level, scaling and shifting the image on top.

(2) For the second image I need to remove the background and replace it with transparency (*). I have seen several videos in YouTube showing how this is done. There seems to be several techniques and I figure that for the specific image attached perhaps there is an optimal approach?

TIA,

Travis Banger

(*) Since I require transparency, the image should be saved in the PNG format, correct?

Note: The images were removed since the moderator does not seem to approve of forensic cases?

The images are attached. Please do not click if you are sensitive to forensic/medical material.

[Nancy OShea]

Image #2.

This is one way to do it.

1. Unlock background layer with a double-click.
2. Use whichever selection tool you're most comfortable using.  I used a Quick Selection Tool on the skull. The styloid process is a little tricky.  Use add/subtract selection to get what you want.  Or you can refine your selection in Quick Mask mode (Q) by painting with a brush or pencil.
   
3. When you're happy with your selection, exit Quick Mask mode (Q).
4. Go to Select menu > Inverse (Ctrl + Shift + i).
5. Hit the backspace key to remove background.