[Radiometric survey during hemodynamic studies with "Siemens Angioskop D" equipment].
OBJECTIVE
To provide data for professional specialized in these subjects, contributing to minimize their exposure radiation dosage.


METHODS
We made a radiometric survey using a ionization chamber to check the exposure rate in several places in the examination's room to different operational conditions of X-ray equipment.


RESULTS
The operational conditions on which we have gotten the highest scatter X-ray rate were: image intensifier with 17cm of diameter for left anterior oblique projection (45 degrees) and image intensifier with 27cm of diameter for perpendicular beam to the patient (0 degrees). During fluoroscopy and cinefilm mode we have got average reduction of 40% for scatter X-ray using the image intensifier of 27 cm of diameter. During the cinefilm the dose rates were 23 times bigger than the dose rate in fluoroscopy mode.


CONCLUSIONS
An analysis of results show that the choice of X-ray entrance angle as well as the diameter of image's intensifier during the cinefilm and fluoroscopy mode change significantly the occupational exposure dosages. Considering that in this kind of procedure, physicians and assistants spent long time close to the patient, they should have special concern to observe the technical condition more appropriate as well as to make use of all protection devices to minimize the personnel dosage.
Medeiros
R B
RB
Escola Paulista de Medicina, São Paulo.
Daros
K A
KA
D002309:Cardiology; D004781:Environmental Exposure; D006282:Health Personnel; D006801:Humans; D011829:Radiation Dosage; D011835:Radiation Protection; D011859:Radiography; D011874:Radiometry / Q000295:instrumentation
Levantamento radiométrico em estudos hemodinâmicos com equipamento "Siemens Angioskop D".