Dosimetory of Teletherapy with Cobalt 60

Barc Develops Cobalt-60 Teletherapy Machine for Cancer Treatment

Human cancer is probably as old as the human race. For normal cells, the growth, division and death of cells occur in a controlled manner. Cancer cells on the other hand multiply in an uncontrolled way creating tumors. Tumors may replace healthy tissues and often start spreading to other parts of the body, leading to a lifethreatening situation. If untreated, most cancers lead to protracted suf...

Radical radiotherapy for squamous cell carcinoma of the larynx--comparison of three-dimensional conformal radiotherapy with cobalt-60 teletherapy.

The aim of the study was to report the results of radical radiotherapy performed by three-dimensional conformal radiotherapy (3DCRT) for squamous cell carcinoma of the larynx and to compare these data with those obtained with two-dimensional radiotherapy (2DRT) realized with cobalt-60 teletherapy i.e. telecobalt therapy (TCT). Eighty patients with previously untreated laryngeal cancer were irra...

Total body irradiation with a reconditioned cobalt teletherapy unit

While the current trend in radiotherapy is to replace cobalt teletherapy units with more versatile and technologically advanced linear accelerators, there remain some useful applications for older cobalt units. The expansion of our radiotherapy department involved the decommissioning of an isocentric cobalt teletherapy unit and the replacement of a column-mounted 4-MV LINAC that has been used f...

Quality control of blood irradiation with a teletherapy unit: damage to stored red blood cells after cobalt-60 gamma irradiation.

BACKGROUND Previous publications have documented the damage caused to red blood cells (RBCs) irradiated with X-rays produced by a linear accelerator and with gamma rays derived from a 137Cs source. The biologic effects on RBCs of gamma rays from a 60Co source, however, have not been characterized. STUDY DESIGN AND METHODS This study investigated the effect of 3000 and 4000 cGy on the in vitro...

Radioactive Cobalt-60 Teletherapy Machine – Estimates of Personnel Dose in Mock Emergency in Patient Release during “Source Stuck Situation”