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| 1 | 有为腹的 CT 的非线性的适应过滤器的申请的放射剂量减小显示文摘 AIM:To evaluate the effect of non-linear adaptive filters (NLAF) on abdominal computed tomography (CT) images acquired at different radiation dose levels.METHODS:Nineteen patients (mean age 61.6 ± 7.9 years,M:F=8:11) gave informed consent for an Institutional Review Board approved prospective study involving acquisition of 4 additional image series (200,150,100,50 mAs and 120 kVp) on a 64 slice multidetector row CT scanner over an identical 10 cm length in the abdomen.The CT images acquired at 150,100 and 50 mAs were processed with the NLAF.Two radiologists reviewed unprocessed and processed images for image quality in a blinded randomized manner.CT dose index volume,dose length product,patient weight,transverse diameters,objective noise and CT numbers wererecorded.Data were analyzed using Analysis of Variance and Wilcoxon signed rank test.RESULTS:Of the 31 lesions detected in abdominal CT images,28 lesions were less than 1 cm in size.Subjective image noise was graded as unacceptable in unprocessed images at 50 and 100 mAs,and in NLAF processed images at 50 mAs only.In NLAF processed images,objective image noise was decreased by 21% (14.4 ± 4/18.2 ± 4.9) at 150 mAs,28.3% (15.7 ± 5.6/21.9 ± 4) at 100 mAs and by 39.4% (18.8 ± 9/30.4 ± 9.2) at 50 mAs compared to unprocessed images acquired at respective radiation dose levels.At 100 mAs the visibility of smaller structures improved from suboptimal in unprocessed images to excellent in NLAF processed images,whereas diagnostic confidence was respectively improved from probably confident to fully confident.CONCLUSION:NLAF lowers image noise,improves the visibility of small structures and maintains lesion conspicuity at down to 100 mAs for abdominal CT. | Sarabjeet Singh Mannudeep K Kalra Mi Kim Sung Anni Back Michael A Blake | 2012 | World Journal of Radiology2012，4，1： | 3 |
| 2 | Pricing death: Frameworks for the valuation and securitization of mortality risk 显示文摘 | Cairns A J G Blake D Dowd K | 2006 | ASTIN Bulletin2006，36，1： | 1 |
| 3 | Turbulent boundary layer wall pressure fluctuations on smooth and rough wall显示文摘 | Blake W K | 1970 | J Fluid Mech1970，44，4： | 1 |
| 4 | Mobilization of aluminum in soil by acid deposition and its uptake by grass cut for hay : A Chemical time bomb显示文摘 | Blake L Johnstone A E Goulding K W T | 1994 | Soil Use and Management1994，10，： | 1 |
| 5 | Simultaneous thermoluminescence and thermally stimulated current in polyethylene显示文摘 | Blake A E Charlesby A Randle K J | 1974 | Journal of Physics D: Applied Physics1974，7，5： | 1 |
| 6 | An evaluation of screening measures for cognitive impairment after stroke显示文摘 | Blake H Mckinney M Treece K | 2002 | Age Ageing2002，31，： | 1 |
| 7 | Distinguishing be- nign from malignant adrenal masses : multi - detector row CT pro- tocol with 10-minute delay 显示文摘 | Blake M A Kalra M K Sweeney A T | 2006 | Radiology2006，238，2： | 1 |
| 8 | Problem-based learning out-comesten years of experience at the University of Missouri-Coloumbia School of Medieine 显示文摘 | Hofman K Hosokawa M Blake RJ | 2006 | Acad Med2006，81，7： | 1 |
| 9 | A rapid, sensitive method for detection of alkaline phosphatase-conjugated anti-antibody on Western blots 显示文摘 | Blake M S Johnston K H Russell-Jones G J | 1984 | Analytical Biochemistry1984，136，1： | 1 |
| 10 | The variable MR appearance of pri- mary lymphoma of the central nervous system : comparison with his- topathologic features显示文摘 | Blake A Evan K Peter C | 1997 | AJNR1997，18，： | 1 |
| 11 | Problem - based learning out - comes: ten years of experience at the University of Missouri- Columbia School of Medieine显示文摘 | Hofman K Hosokawa M Blake R J | 2006 | Acad Med2006，81，7： | 1 |
| 12 | Stochastic lifestyling: Optimal dynamic asset allocation for defined contribution pension plans显示文摘 | Cairns A Blake D Dowd K | 2006 | Insurance: Mathematics and Economics2006，30，： | 1 |
| 13 | Fluorinated OrganicsintheBiosphereE显示文摘 | Blake D K Robert D H Craig S C | 1997 | Environ Sci Technol1997，31，9： | 1 |
| 14 | Mutation in the promoter region of the beta-fibrinogen gene and the risk of future myocardial infarction,stroke and venous thrombosis显示文摘 | Blake GJ Schmitz C Lindpaintner K | 2001 | Eur Heart J2001，22，24： | 1 |
| 15 | An evaluation of screening measures for cognitive impairment after stroke 显示文摘 | Blake H McKinney M Treece K | 2002 | Age Ageing2002，31，6： | 1 |
| 16 | Fine structure constant defines visual transparency of graphene显示文摘 | NAIR R BLAKE P GRIGORENKO A NOVOSELOV K S BOOTH J STAUBER T PERES N M R GEIM A K | 2008 | Science2008，320，5881： | 1 |
| 17 | Soil invertebrate and microbial communities,and decomposition as indicators of polycyclic aromatic hydrocarbon contamination显示文摘 | Blakely J K Neher D A Spongberg A L | 2002 | Applied Soil Ecology2002，21，1： | 1 |
| 18 | Metropolitan area income inequality and self-rated health-a multi-level study显示文摘 | Blakely TA Lochner K Kawachi I | 2002 | Soc Sci Med2002，54，1： | 1 |
| 19 | Serum IgA,IgG,and IgM antibodies directed against acetaldehyde-derived epitopes:relationship to liver disease severity and alcohol consumption显示文摘 | Viitala K Israel Y Blake JE | 1997 | Hepatology1997，25，： | 1 |
| 20 | long-term value at risk 显示文摘 | Dowd K Blake D and Cairns A | 2004 | The Journal of Risk Finance2004，2004，： | 1 |
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