For precise and accurate patient dose delivery,the dosimetry system must be calibrated properly according to the recommendations of standard dosimetry protocols such as TG-51 and TRS-398. However, the dosimetry protoc...For precise and accurate patient dose delivery,the dosimetry system must be calibrated properly according to the recommendations of standard dosimetry protocols such as TG-51 and TRS-398. However, the dosimetry protocol followed by a calibration laboratory is usually different from the protocols that are followed by different clinics, which may result in variations in the patient dose.Our prime objective in this study was to investigate the effect of the two protocols on dosimetry measurements.Dose measurements were performed for a Co-60 teletherapy unit and a high-energy Varian linear accelerator with 6 and 15 MV photon and 6, 9, 12, and 15 MeV electron beams, following the recommendations and procedures of the AAPM TG-51 and IAEA TRS-398 dosimetry protocols. The dosimetry systems used for this study were calibrated in a Co-60 radiation beam at the Secondary Standard Dosimetry Laboratory(SSDL) PINSTECH,Pakistan, following the IAEA TRS-398 protocol. The ratio of the measured absorbed doses to water in clinical setting,D_w(TG-51/TRS-398), was 0.999 and 0.997 for 6 and15 MV photon beams,whereas these ratios were 1.013,1.009, 1.003, and 1.000 for 6, 9, 12, and 15 MeV electron beams, respectively. This difference in the absorbed dosesto-water D_w ratio may be attributed mainly due to beam quality(K_Q) and ion recombination correction factor.展开更多
An integrated management architecture which called Adaptive Agent and Profile Management System(AAPMS) was proposed here.Using this system,users can get an adaptive service list according to their current condition(te...An integrated management architecture which called Adaptive Agent and Profile Management System(AAPMS) was proposed here.Using this system,users can get an adaptive service list according to their current condition(terminal capability,user preference,etc.).After choosing a service,the users only need to download a simple service agent to their mobile device and install it,and then the service agent will connect to the corresponding service provider.The users and the service providers can also manage their profiles using AAPMS.展开更多
AAPM = American association of physicists in medicine =美国医学物理学家协会；AJCC = American joint committee on cancer=美国癌症研究联合会； ATCC = American type culturecollection=美国模式培养物保藏所；ATM = ataxia-tel...AAPM = American association of physicists in medicine =美国医学物理学家协会；AJCC = American joint committee on cancer=美国癌症研究联合会； ATCC = American type culturecollection=美国模式培养物保藏所；ATM = ataxia-telangiectasia mutated=毛细血管扩张共济失调突变。展开更多
AAPM = American association of physicists in medicine =美国医学物理学家协会； ADC = apparent diffusion coefficient=表观弥散系数； AJCC = American joint committee on cancer=美国癌症研究联合会； ART = adaptive radiation...AAPM = American association of physicists in medicine =美国医学物理学家协会； ADC = apparent diffusion coefficient=表观弥散系数； AJCC = American joint committee on cancer=美国癌症研究联合会； ART = adaptive radiation therapy =自适应放疗。展开更多
文摘For precise and accurate patient dose delivery,the dosimetry system must be calibrated properly according to the recommendations of standard dosimetry protocols such as TG-51 and TRS-398. However, the dosimetry protocol followed by a calibration laboratory is usually different from the protocols that are followed by different clinics, which may result in variations in the patient dose.Our prime objective in this study was to investigate the effect of the two protocols on dosimetry measurements.Dose measurements were performed for a Co-60 teletherapy unit and a high-energy Varian linear accelerator with 6 and 15 MV photon and 6, 9, 12, and 15 MeV electron beams, following the recommendations and procedures of the AAPM TG-51 and IAEA TRS-398 dosimetry protocols. The dosimetry systems used for this study were calibrated in a Co-60 radiation beam at the Secondary Standard Dosimetry Laboratory(SSDL) PINSTECH,Pakistan, following the IAEA TRS-398 protocol. The ratio of the measured absorbed doses to water in clinical setting,D_w(TG-51/TRS-398), was 0.999 and 0.997 for 6 and15 MV photon beams,whereas these ratios were 1.013,1.009, 1.003, and 1.000 for 6, 9, 12, and 15 MeV electron beams, respectively. This difference in the absorbed dosesto-water D_w ratio may be attributed mainly due to beam quality(K_Q) and ion recombination correction factor.
文摘An integrated management architecture which called Adaptive Agent and Profile Management System(AAPMS) was proposed here.Using this system,users can get an adaptive service list according to their current condition(terminal capability,user preference,etc.).After choosing a service,the users only need to download a simple service agent to their mobile device and install it,and then the service agent will connect to the corresponding service provider.The users and the service providers can also manage their profiles using AAPMS.
文摘AAPM = American association of physicists in medicine =美国医学物理学家协会；AJCC = American joint committee on cancer=美国癌症研究联合会； ATCC = American type culturecollection=美国模式培养物保藏所；ATM = ataxia-telangiectasia mutated=毛细血管扩张共济失调突变。
文摘AAPM = American association of physicists in medicine =美国医学物理学家协会； ADC = apparent diffusion coefficient=表观弥散系数； AJCC = American joint committee on cancer=美国癌症研究联合会； ART = adaptive radiation therapy =自适应放疗。
