Modern images have became essential to our daily work because they pro
vide high quality representations which, with admittedly some difficul
ties and pitfalls, allow detection and diagnosis of lesions and moreov
er inspire and guide every step of surgery. This place and value of th
e image as the main source of technical information required for the p
atient's management is straightforward and raises no major epistemolog
ical problem. However our use of images easily escapes critical thinki
ng. Images may impose their own power and rationality. Medical images
are powerful for the patient and for the doctor because they contain a
n unlimited source of explanation for the disease, they make disease a
nd functional complaints, comprehensible. They are important for the s
urgeons because they offer an unique and irreplaceable guide to the le
sions, they make it visible, they give shape and in fact reality to wh
at in the patient, belongs to surgery. This power of medical images is
irrefutable because, rather than mere representations, they are analo
gical reflexions of the real body with its real lesions, there is an o
ntological continuity between image and reality. For these and some ot
her reasons we are tempted to give to images a consideration which sho
uld be due only to the patient himself. This temptation is idolatrous
in nature. Under a number of different aspects this tempation pervades
the entire field of medicine and might ultimately narrow our vision o
f patients, our vision of man.