Film techniques in radiotherapy for treatment verification, determination of patient exit dose, and detection of localization error

Conference · Tue Jan 01 04:00:00 EST 1974

OSTI ID:4125422

Haus, A G; Marks, J E

In patient radiation therapy, it is important to know that the diseased area is included in the treatment field and that normal anatomy is properly shielded or excluded. Since 1969, a film technique developed for imaging of the complete patient radiation exposure has been applied for treatment verification and for the detection and evaluation of localization errors that may occur during treatment. The technique basically consists of placing a film under the patient during the entire radiation exposure. This film should have proper sensitivity and contrast in the exit dose exposure range encountered in radiotherapy. In this communication, we describe how various exit doses fit the characteristic curve of the film; examples of films exposed to various exit doses; the technique for using the film to determine the spatial distribution of the absorbed exit dose; and types of errors commonly detected. Results are presented illustrating that, as the frequency of use of this film technique is increased, localization error is reduced significantly. (auth)

• Research Organization: Franklin McLean Memorial Research Inst., Chicago, Ill. (USA)
• NSA Number: NSA-33-012340
• OSTI ID: 4125422
• Report Number(s): CONF-7410141--1
• Country of Publication: United States
• Language: English

Related Subjects

*PATIENTS-- RADIOTHERAPY
*PHOTOGRAPHIC FILM DOSEMETERS-- EFFICIENCY
560151* --Biomedical Sciences
Applied Studies--Radiation Effects--Radiation Effects on Animals--Man
MEASURING METHODS
N48510* --Life Sciences--Radiation Effects on Animals--Man
RADIATION DOSE DISTRIBUTIONS
SPATIAL DOSE DISTRIBUTIONS