Dental Application of CBCT in Implant planning.
高雄長庚醫院牙科 黃 志 成
mA
KVP Density
Contrast
Exposure to radiation causes damage
to living tissue, resulting in skin burns,
radiation sickness and death at high
doses and cancer, tumors and genetic
damage at low doses.
有必要才照
照出有診斷價值的影像 穿鉛衣
環境及人員安全
Photons, all energies : Q = 1 Electrons and muons, all energies : Q = 1 Neutrons,
energy < 10 keV : Q = 5 10 keV < energy < 100 keV : Q = 10 100 keV < energy < 2 MeV : Q = 20 2 MeV < energy < 20 MeV : Q = 10 energy > 20 MeV : Q = 5 Protons, energy > 2 MeV : Q = 5 Alpha particles and other atomic nuclei : Q = 20
Gonads: N = 0.2
Bone marrow, colon, lung, breast, stomach: N = 0.12 Bladder, brain, salivary glands, kidney, liver, muscles,
oesophagus, pancreas, small intestine, spleen, thyroid, uterus: N = 0.05 Bone surface, skin: N = 0.01
稍微曝光不足的數位照 片可由軟體調整到令人滿意 的結果。
而曝光過度的數位照片 卻會喪失亮部細節,永遠無 法調整到令人滿意的結果。