A thorough examination of the plants is necessary, so use a hand lens to look closely at unhealthy tissue. (fieryfoodscentral.com)
Because the MRI signal is affected by the presence of these iron particles, the resulting images reveal locations of unhealthy tissue. (caltech.edu)
Laser surgery can be used to make unique bloodless laser incisions, as well as to remove unhealthy tissue such as tumors, without excessive loss of blood typical of conventional scalpel based surgery. (wpvet.com)