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유화 노
9 years ago
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1 98 年不療理類 ˍˍˍˍˍˍˍ 不不 1 利 kvp mas noise 粒度 film graininess structure mottle 量 quantum mottle 度 optical density 2 DR 數 fill factor TFT 例例來 X 例 3 利 0.3mm X 行離 SID 100cm 離 20cm 數 magnification factor focal-spot blur 度 mm mm mm mm 4 X 若流不 15% 列 X 度 mas X X 量 15 5 line-pair pattern 來 X kvp 度 spatial resolution contrast 數 intensification factor 6 列來 X quality 量 quantity 降 7 不 X 列漣 voltage ripple full-wave high frequency 3 phases 6 pulses 3 phases 12 pulses 8 列不數 digital fluoroscopy, DF ma high-contrast subtraction image 理 postprocessing image acquisition 率 9 grid 50 µm grid strip width 350 µm grid strip interspace width X 率 11% 12.5% 14.3% 16.7% 10 若 3MHz 度 imaging depth 20cm 5MHz 率度 cm grid strip width 30 µm grid strip interspace width 300 µm 率 grid frequency 55 lines/inch 66 lines/inch 77 lines/inch 88 lines/inch

2 若 X mammography cassette image receptor double emulsion film 兩 intensifying screen single emulsion film 兩 intensifying screen single emulsion film intensifying screen 不 intensifying screen emulsion 露 direct-exposure film 13 X focusing cup 連列零不不 14 療 A 列 fiducial plates primary collimator shutters/blades field defining wires 15 W 不 32kVp 濾濾度 (Al)/20 µm (Ni)/40 µm (Mo)/60 µm (Cr)/50 µm 16 若切 CT multislice CT 行列 multidetector array 16 行行 1.5mm X 6mm X 4 切 slice pitch 1.3 X 度 beam width 6 mm 12 mm 18 mm 24 mm 17 subtraction 行理列度度 18 CCD charge-coupled devices 數列 CCD X 露量露不露度數度 spatial resolution 數理 postprocessing contrast electronic noise

3 列 mammography X 例行 X 不 X 率 X focal spot X 量 X X 不濾 filter 20 CT 連 photomultiplier tube 連 photodiode 列兩不兩來便連 CT 連 21 CT pixel 列 computer program predetector collimator X prepatient collimator 22 列 CT CT number HU Hounsfield Units CT 0 CT number (µ µ )/µ K µ 數 linear attenuation coefficient CT 數不 X 不異數 constant K HU Hounsfield Units K CT 度參數列數 edge-response function, ERF 數 modulation transfer function, MTF 立葉數 Fourier transfer function, FTF 數 special modulation function, SMF 24 CT X pencil beam X fan beam 列輻狀度領濾 bowtie filter X 度 image reconstruction algorithm 行 25 17cm image-intensifier tube 燐 2.5cm 量 flux gain 120 亮度 brightness gain 列 MRS SNR chemical shift ppm 度行

4 CT SPECT PET 數 sinogram 列 sinogram CT 狀 star artifact 更 sinogram 數 CT 狀 ring artifact SPECT sinogram 數 motion artifact PET blank scan sinogram 28 列 head coil body coil knee coil wrist coil 29 利列來利 TR TE 利 T2 利 T1 利度 dephase 30 勒率 Doppler shift frequency 率 operating frequency or source frequency 1/10 1/ 列 artifact 度 axial resolution 度 pulse length 度 section thickness 度 pulse length shadowing high attenuation spectrum mirror 勒 low Doppler gain 32 勒 color Doppler instrument 列勒 compressed Doppler 連勒 continuous wave Doppler 勒 pulsed Doppler 勒 expansion Doppler 33 流狀濾 wall filter 類勒 Doppler shift echo 度度度度 34 MRI 列 volume coil 度 RF body coil excitation RF B 1 field 35 impedance 度度度度度度 0.5 度度 36 度不列度降 TE 降 37 5MHz mm

5 若度 spatial peak-pulse average intensity, I SPPA 500mW/cm 2 數 duty factor, DF 0.01 度 spatial peak-temporal average intensity, I SPTA 10mW/cm 2 5mW/cm 2 2.5mW/cm mW/cm 2 39 列 diamagnetism 率 susceptibility 不 40 列療若療量列 supervoltage therapy machine Grenz-ray therapy machine superficial therapy machine orthovoltage therapy machine megavoltage therapy machine 41 MRI 列來度 shim 42 列度 43 列 radiofrequency 率度離 44 respiratory compensation 列 electrode 來 MR k-space MR k-space phase mismapping 45 G 理 FDA 年暴露率 SAR 0.4 W/kg 3 W/kg 5 W/kg 8 W/kg 47 拉鍊 zipper artifact RF 不 48 fast spin echo 列若 TR 切列度 echo train length 8 TR 度

6 列 MAGNET WINDINGS A B INSULATED CROSSOVER I A B 0 B B 1 A B 1 B B 0 A B B 1 A B B 療若來臨療 microtron Van De Graaff generator cyclotron Betatron 52 列 Gibbs artifact 數度金 53 Fricke 量 G medium-melt 金量 55 列療量 Timo supports bolus Silverman supports chin support 56 supervoltage therapy 量 kv kv kv 500 kv-1 MV 57 臨療 plastic molds 理度 cm cm cm cm 58 列 Farmer 離療量量 200 kev

7 59 來 SSD 量離離 60 療 Co-60 爐 59 Co(n, ) 60 Co 59 Ni(n, ) 60 Co 59 Co(, ) 60 Ni 60 Ni(n, ) 60 Co 61 不 360 量 X 量 X 離 62 klystron 率尿參數尿度尿度尿度尿度 64 臨率 300 khz 300 MHz 3000 MHz MHz 65 ion chamber well counter survey meter dose calibrator 66 見見見見見見 67 SPECT 180 度列 68 若 pixels pixel 2 bytes 料量 1 kb 1024 bytes 32 kb 64 kb 132 kb 256 kb

8 列 70 行 71 行若數 count 列 collimator high resolution low-energy all-purpose pinhole high energy 72 NaI Tl crystal 不 PET decay time 靈度見率料不度量 511keV 領 73 列不 SPECT 不靈度不不易不量度 74 列濾濾 Hann filter 濾濾狀濾 75 利 SPECT 狀 non-uniformity COR misalignment 量不 projection not enough short scan time 76 列 SPECT 不 continuous 料 elliptical orbit 不行理 77 PET 列度 DOI depth of interaction 度 78 Dynode 79 SPECT 靈度降度度降降 80 PET septa 度 sensitivity 度 resolution 度度度度度度度度

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