It's unclear how long before clinical death she began this. Why exactly was it necessary? Was this actually to induce earlier clinical death and reduce the cancer's damage to the brain? That is... grisly, and brave, indeed.
Doesn't the link say she did that 11 days before death?
http://www.alcor.org/blog/?p=2716
Previously on LW: Aug 18, Aug 25, Aug 27, Jan 22.