Key points from article :
New laser based technology known as Cytophone can scan circulating tumour cells (CTCs) in blood.
Laser pulses spotted CTCs running through veins of patients with melanoma and blasted them.
1000 times more sensitive results within 10 seconds to 60 minutes without venepuncture.
Dealt with varied skin pigmentation in the people it scanned and their movement.
More research needed before it can be used as a treatment for cancer.
Research by University of Arkansas for Medical Sciences published in Science Translational Medicine.
