It is recommended that radiation from the tube should not exceed 100mR/hr at 1m, where precisely should your 1m be? This is because I find varied opinions in literature at times. Please I need the standard.
It should be 1m away from the tube target but must not be in the general direction of the primary beam exit. That is how I think tube leakage should be measured.
Chief Sir, thank you so much for your contribution that was my thought too.
The recommendation for measuring leakage radiation from x-ray tubes at 1m distance from its focal spot was enforced in order to standardize the QA procedures all over the world. Also it's mainly addressed to the protection of the staff , that in many situations ( cardiac catheteterism, angio) , stays in the room.
I agree with my colleagues the distance of 1 m is suitable. I think the measurement of x-ray leakage is very important because for its effects in adding the environmental risk and the absorbed dose to the workers.
Issues are of importance: (1) filters used (2) type of tube (general x-ray tube, mammography) (3) mAs.
Of course the 1-m SSD is the standard.
For the methodology:
Medical Physics has many published papers on the subject. AAPM also publishes there. The protocols of AAPM are very strict. Otherwise, ask the Medical Physicist Association of Saudi Arabia. If there is no standard, use the AAPM suggestions. If you can not access the papers, please be kind enough and reply so as to upload them.
Thank you so much for your insightful input Dimitrios, i am not able to access the papers you cited. I will appreciate if you can help me upload them. I'll find them very useful.
Thank you.