The TERADI 800 is an isocentric cobalt teletherapy unit, designed to be loaded with high-activity sources (200 RMM load capacity). Its general characteristics correspond to a modern design concept but without losing the simplicity that should characterize a cobalt therapy unit.

The TERADI 800 has a source-axis distance of 80 cm. The precision of the isocentre remains within a 1 mm-radius sphere.

The maximum field obtainable at the height of the isocentre is 35 x 35 cm. The achievable fields are regular, either rectangular or square. The smallest field is 5 x 5 cm (for trimmers at 45 cm). Also available are trimmers to be installed at 55 and 65 cm from the source to lower the effects of penumbra.

The unit is provided with a swivelling head and a beam stopper or counterweight. The head's swivel allows obtaining large fields in view that the patient may be placed at great distances from the source.

The control system is computerized. Interaction between the operator and the unit is achieved through a computer monitor and keyboard and a special panel located on the console. Data on every treatment are registered on the computer's hard disk and may be retrieved for control purposes. The system has a data file that allows authorised maintenance personnel to detect faults and solve technical problems.

In the case of kinetic (rotation or arc) treatments, the control system calculates and determines the angular speed for the rotary gantry to comply with the established time and angle. It also supervises the movement of the gantry throughout its travel, correcting possible movement irregularities and suspending the treatment should the gantry stop due to any fault. The operator receives constant information on the progress of the treatment via the digital clock display. The system is equipped with three independent clocks that guarantee proper treatment duration and its completion in due time.

A pneumatic system was chosen for source activation. This system has proven to be safe and reliable, easy to maintain and quite simple when the source needs to be replaced. Many source suppliers can perform this task.

In view that the control system keeps a constant check of the transit time of the source between the RADIATION ON and RADIATION OFF positions, should the time elapsed exceed two seconds, the treatment would be automatically aborted, the SOURCE alarm would be tripped and the collimator would be closed automatically.

The collimator is fully motorized, with 2-speed opening, closing and rotation movements. It begins to move slowly, reaching top speed after a few seconds.

Customers may choose from two types of couches upon purchase of the unit. The manual couch features a 2-speed motorized vertical movement, while in the other version all movements are motorized and 2-speed. All movements except the vertical one may be manually performed, adding flexibility to the use of the couch and reducing patient positioning time. Tables are identical in both couches, with panels that may be removed in one piece or in halves, providing high versatility. They are also equipped with a tennis-racket type section and a headrest that may be placed at either end. Rails may be fitted along the sides of the table for fixing accessories.

TERADI 800 Dealers & Distributors Company Information

Contact us at: marketing@invap.com.ar or invapder@infovia.com.ar

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