Japanese Journal of Radiological Technology
Online ISSN : 1881-4883
Print ISSN : 0369-4305
ISSN-L : 0369-4305
5. DOSE MONITORING SYSTEM IN TOTAL BODY IRRADIATION
KAZUO IZAWA
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1991 Volume 47 Issue 12 Pages 2056-2061

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Abstract

We discussed suitable X-rays energy, dose monitorring system and other problems in the total body irradiation. As the results, 1) X-rays energy : 10MV X-rays is better than 4MV X-rays for flatness on central axis, although 4MV X-rays is better than 10MV X-rays for large field and the short surface axis distance (SAD). A dose distribution of 4MV X-rays is improved by the four field technique, of anterior-posterior and lateral opposed fields. 2) Phantom which is as large as a human body is necessary for the dose measurment of large field. 3) Dose monitoring : Standard point dose in the pelvis must be kept within 99.5±3.4% for expected dose. 4) Dose monitoring system : This system is necessary for the dose evaluation on the mid-line of the body. The mid-line dose is influenced by the flatness in the field and compensating material.

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© 1991 Japanese Society of Radiological Technology
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