PROBLEMS AND CRITICAL CONSIDERATIONS RELATIVE TO FILM DOSIMETRY FOR PROTECTION AGAINST IONIZING RADIATION

Journal Article · Tue Dec 01 04:00:00 EST 1959 · Radiologia Medica (Italy)

OSTI ID:4188043

Bellucci, B

The sources of error which enter into the precision of film dosimetry are considered with emphasis on two particular points which can lead to dosimetric evaluations quite remote from actuality. The first point is the variable incidence with which radiation strikes the film-badge plates. Experimental research shows that oblique or lateral incidence can cause dosimetric deviations of 100% of the value indicated by a film. The second error lies in the location of the film badge on the person of the radiologist with respect to shielding worn by him. This can cause dosimetric evaluations both higher and lower than the dose received. To remedy these errors, a correction coefficient for the value indicated by the film is proposed; this coefficient is obtained by experimental studies of dosimetry by a moving film badge compared with values obtained by a stationary badge. On the other hand two plates could be used simultaneously, one under the shielding and the other on an unprotected part of the body (anterior surface of the arm). The evaluation of the dose indicated by the two films would be accomplished by a percentage factor based on calculation of the protected and unprotected body surface to indicate the effective dose received by the body of the radiologist. Also a technique is proposed mainly for obtaining standard dosimetric films exposed by exact radiation doses (as opposed to the present autonomous film-badge technique). This new method involves simultaneous exposure of 10 films to a decreasing scale of doses obtained by application of the law of the square at distances. (tr- auth)

• Research Organization: Universita, Perugia, Italy
• NSA Number: NSA-14-009685
• OSTI ID: 4188043
• Journal Information: Radiologia Medica (Italy), Journal Name: Radiologia Medica (Italy) Vol. Vol: 45; ISSN RAMEA
• Country of Publication: Country unknown/Code not available
• Language: Italian

Related Subjects

ABSORPTION
ANGULAR DISTRIBUTION
BODY
DOSEMETERS
ERRORS
FILM BADGES
GAMMA RADIATION
HEALTH AND SAFETY INCLUDING DOSIMETRY
MAN
MATHEMATICS
MEASURED VALUES
MOTION
PERFORMANCE
PERSONNEL
PHOTOGRAPHIC FILM
RADIATION DOSES
RADIATION EFFECTS
RADIATION PROTECTION
SHIELDING
SURFACES
X RADIATION