METHOD OF USE OF AREAS OF REDUCED ATTENUATION IN AN IMAGING SUPPORT
A patient imaging support is provided having first and second areas of reduced imaging energy attenuation to avoid increased in imaging energy by automatic exposure control voids during use of a C-arm imaging device in the right anterior oblique (RAO) and/or left anterior oblique (LAO) positions and to allow reduction of the amount of X-ray energy or other imaging energy needed to produce an image of the procedure field and for observation by medical personnel.
1 . A method of reducing human exposure to imaging energy during radiation imaging of a patient using an imaging device having an automatic exposure control, the method comprising:
providing a patient supporting frame for supporting a patent during imaging of the patient with an imaging device having an automatic exposure control said frame defining at least a portion of a perimeter of a first area of reduced imaging energy attenuation, and
forming a second area of reduced imaging energy attenuation on said frame, said second area of reduced imaging energy attenuation comprising a margin portion of said frame said margin portion positioned adjacent to said first area of reduced imaging energy attenuation, said margin portion being comprised of a generally X-ray transparent material such that the contacting of both of said first and said second areas of reduced imaging energy attenuation with imaging energy from said imaging device does not cause the automatic exposure control to detect a sufficient loss of imaging energy due to imaging energy striking said second area of reduced imaging energy attenuation to cause a substantial increase in imaging energy by the automatic exposure control.
2 . The method as claimed in claim 1 wherein said first area of reduced imaging energy attenuation is comprised of a void.
3 . The method as claimed in claim 1 wherein said first area of reduced imaging energy attenuation is comprised of a void and said second area of reduced imaging energy attenuation is comprised of beryllium.
4 . The method as claimed in claim 1 wherein said first area of reduced imaging energy attenuation is comprised of a void and said second area of reduced imaging energy attenuation is comprised of carbon fiber.
5 . The method as claimed in claim 1 wherein said support frame is comprised of steel and said first area of reduced imaging energy attenuation is comprised of a void and said second area of reduced imaging energy attenuation is comprised of beryllium.
6 . The method as claimed in claim 1 wherein said support frame is comprised of steel and said first area of reduced imaging energy attenuation is comprised of a void and said second area of reduced imaging energy attenuation is comprised of carbon fiber.
7 . The method as claimed in claim 1 wherein said support frame is comprised of aluminum and said first area of reduced imaging energy attenuation is comprised of a void and said second area of reduced imaging energy attenuation is comprised of beryllium.
8 . The method as claimed in claim 1 wherein said support frame is comprised of aluminum and said first area of reduced imaging energy attenuation is comprised of a void and said second area of reduced imaging energy attenuation is comprised of carbon fiber.
9 . The method as claimed in claim 2 further comprising the step of applying a support cover plate to said support frame to cover said void of said first area of reduced imaging energy attenuation.
10 . A method of reducing human exposure to imaging energy by providing first and second areas of reduced attenuation of imaging energy adjacent to the imaged portions of the patient's body to allow reduction in the amount of imaging energy applied to the patient during the conduct of radiation imaging of the patient and to avoid causing a substantial imaging energy increase response by an automatic exposure control of the imaging device, the method comprising:
providing a patient support comprising a support frame said support frame defining a perimeter of at least a portion of a first area of reduced imaging energy attenuation,
providing a second area of reduced imaging energy attenuation comprising a margin portion of said frame adjacent to said first area of reduced imaging energy attenuation, said second area of reduced imaging energy attenuation being comprised of a generally x-ray transparent material,
placing the patient on said patient support such that the areas of the patient intended for imaging are within both said first area of reduced imaging energy attenuation and said second area of reduced imaging energy attenuation,
positioning a x-ray emitting imaging device adjacent the patient support such that the x-ray energy is emitted at an acute angle with respect to the support, and
conducting an x-ray imaging procedure on the patient such that a portion of the emitted x-ray energy contacts both said first area of reduced imaging energy attenuation and said second area of reduced imaging energy attenuation and said automatic exposure control does not detect a sufficient loss of imaging energy due to imaging energy striking said second area of reduced imaging energy attenuation to result in a substantial imaging energy increase response by an automatic exposure control of the imaging device
11 . The method as claimed in claim 10 wherein said first area of reduced imaging energy attenuation is comprised of a void.
12 . The method as claimed in claim 10 wherein said first area of reduced imaging energy attenuation is comprised of a void and said second area of reduced imaging energy attenuation is comprised of beryllium.
13 . The method as claimed in claim 10 wherein said first area of reduced imaging energy attenuation is comprised of a void and said second area of reduced imaging energy attenuation is comprised of carbon fiber.
14 . The method as claimed in claim 10 wherein said support frame is comprised of steel and said first area of reduced imaging energy attenuation is comprised of a void and said second area of reduced imaging energy attenuation is comprised of beryllium.
15 . The method as claimed in claim 10 wherein said support frame is comprised of steel and said first area of reduced imaging energy attenuation is comprised of a void and said second area of reduced imaging energy attenuation is comprised of carbon fiber.
16 . The method as claimed in claim 10 wherein said support frame is comprised of aluminum and said first area of reduced imaging energy attenuation is comprised of a void and said second area of reduced imaging energy attenuation is comprised of beryllium.
17 . The method as claimed in claim 10 wherein said support frame is comprised of aluminum and said first area of reduced imaging energy attenuation is comprised of a void and said second area of reduced imaging energy attenuation is comprised of carbon fiber.
18 . The method as claimed in claim 11 further comprising the step of applying a support cover plate to said support frame to cover said void of said first area of reduced imaging energy attenuation.