Transcription of 医用画像システム1 - cfme.chiba-u.jp
1 Computed radiography (CR) flat panel detector (FPD) 1detector (FPD) 2010 1 X X X X 2 t t 3 xi yj),(yxf pixel(picture element) pel (i,j) ijfjif ),(4 (sampling) (quantization) )(f255 )(xf)(ixf)(ixf)(f)(1xf 0 x1x2x3xixix Analog-to-Digital 2n n 8bits 256 10bits 1024 5n 10bits 1024 sampling theorem umax umax )
2 (xf 1x /() max2ux )(tf1/(2 x) x x 1 x6 max2ux= 7 255iijf ijf0jj i8 9256x256128x1281064x6432x328 bits 7 bits 1136 bits 5 bits 4 bits 3 bits 122 bits 1 bit fiifi-1fi+1ii+1x f(x) 14 Bit-plane slicing15 Bit-plane slicingO8bit b tBit-plane 7(most significant bit: MSB)One 8-bit byte(most significant bit: MSB)Bit-plane 0 Bitplane 0(least significant bit: LSB)16 Bit-plane slicing17 Bit-plane slicing18)
