| Summary: | Research to determine the relationship between the image and the real
object by spatial calibration and measuring of radiation dose distribution of
dental panoramic machine in the radiography room has been done. The spatial
calibration was done by taking the image of standard measure in the form of wire
in various length put vertically and horizontally at the right, middle, and left bone
position on the lower jaw human bone. The result of research show that the
calibrations factor of those three positions wire horizontally at A1, B1, and C1
are different wich are 8.9 ± 0.5 pixel/mm, 7.8 ± 0.2 pixel/mm, and 9.2 ± 0.3
pixel/mm respectively and therefore the calibration factor of DBSWin software is
9.9 pixel/mm doesn�t apply for all part of the image. The radiation dose
distribution measurement was done for panoramic X-ray machine operated at
voltage 80 kV, current of 10 mA, and 4 second exposure time. The higest dose
found at the center position of the object being radiographed. Dose radiation of
right cheek 4.6 mR/hr, left cheek 4.7 mR/hr, and the back of the head 4.9 mR/hr
whereas the average dose rate was found to be 4.7 mR/hr. This suggest that the
radiation dose rate on object doesn�t excedd the Dose Limit Value (NBD) of
Bapeten that value is 5.7 mR/hr because during the process of X-ray radiation
exposure doesn�t focussed on one point.Research to determine the relationship between the image and the real
object by spatial calibration and measuring of radiation dose distribution of
dental panoramic machine in the radiography room has been done. The spatial
calibration was done by taking the image of standard measure in the form of wire
in various length put vertically and horizontally at the right, middle, and left bone
position on the lower jaw human bone. The result of research show that the
calibrations factor of those three positions wire horizontally at A1, B1, and C1
are different wich are 8.9 ± 0.5 pixel/mm, 7.8 ± 0.2 pixel/mm, and 9.2 ± 0.3
pixel/mm respectively and therefore the calibration factor of DBSWin software is
9.9 pixel/mm doesn�t apply for all part of the image. The radiation dose
distribution measurement was done for panoramic X-ray machine operated at
voltage 80 kV, current of 10 mA, and 4 second exposure time. The higest dose
found at the center position of the object being radiographed. Dose radiation of
right cheek 4.6 mR/hr, left cheek 4.7 mR/hr, and the back of the head 4.9 mR/hr
whereas the average dose rate was found to be 4.7 mR/hr. This suggest that the
radiation dose rate on object doesn�t excedd the Dose Limit Value (NBD) of
Bapeten that value is 5.7 mR/hr because during the process of X-ray radiation
exposure doesn�t focussed on one point.
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