X-ray or gamma ray systems or devices – Specific application – Absorption
Patent
1980-06-09
1982-12-21
Smith, Alfred E.
X-ray or gamma ray systems or devices
Specific application
Absorption
378 69, 378 99, 378205, A61N 500
Patent
active
043653413
ABSTRACT:
A method and apparatus are provided for the on-line treatment monitoring of patients during radiation teletherapy. A patient is positioned in the irradiation portal of the radiation teletherapy machine in a supposed effective treatment position, and operation of the machine is effected to provide several pulses of high energy x-rays. The pulses are detected by a plurality of solid-state detectors disposed on the opposite side of the patient as the teletherapy machine, and the pulses are transformed to electrical signals. Lead covers the detectors to screen out low energy radiation. The electrical signals are immediately automatically converted to a readable display providing the landmarks of the irradiation portal, and the patient's position as defined by the landmarks is compared to a predetermined desired position for effective treatment. In case of misalignment, treatment is halted, the patient's position is then immediately adjusted with respect to the irradiation portal so that it is proper for effective treatment, and the radiation teletherapy machine is then actuated to deliver the desired dosage of radiation to the patient for therapy. The digital data of the image can be stored on magnetic disk or tape for later review.
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Fields Carolyn E.
Smith Alfred E.
The Johns Hopkins University
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