Dose distribution

90Y PET/CT imaging is performed after radioembolization to re-evaluate the resin microsphere distribution and estimate the absorbed radiation dose of target tumor. The purpose of our study is to validate the utility of 90Y PET/CT compared to SPECT/CT simulation in dosimetry and prediction of treatment response.

8p viling 11-10-2024 1 1   Download

Jiaogulan (Gynostemma pentaphyllum (Thunb.) Makino) is distributed mostly in mountainous areas, in shaded and humid places at 300-3200 meters above sea level. This study was conducted to determine the appropriate application dose of nitrogen for the growth of Jiaogulan under different shading conditions.

11p vibecca 01-10-2024 2 1   Download

The purpose of the study is to quantify breast dose to reassure patients and staff that these understandings still apply. A combination of measurements and simulations were used to estimate absorbed breast dose. Gafchromic® XR-QA2 film was used to measure breast dose placed inside the RANDO® phantom in a series of controlled experiments. The RANDO® is an anthropomorphic phantom commonly used for dosimetry investigations. Gafchromic® XR QA2 film is a radiochromic film that changes colour when irradiated. Simulation is commonly used and readily available.

195p runthenight05 01-03-2023 6 3   Download

Dosimetry is of crucial importance in radiation processing of food. Among others, plastic film has been widely used for dosimetry in radiation therapy since its density is quite similar to the equivalent biological materials. In this study, the depth dose distribution was estimated by using gafchromic film for the purpose of dosimetry in food irradiation.

7p larachdumlanat127 02-01-2021 14 1   Download

The paper deals with dose and temperature characteristics inside the SFCM after transition of the molten mixture to solid state. Calculations were made on simplified spherical models, without connection to some specific nuclear accident.

6p christabelhuynh 30-05-2020 12 2   Download

Tuyển tập các báo cáo nghiên cứu về y học được đăng trên tạp chí y học Radiation Oncology cung cấp cho các bạn kiến thức về ngành y đề tài: Dose distribution in the thyroid gland following radiation therapy of breast cancer-a retrospective study...

7p toshiba10 14-10-2011 45 5   Download

Tuyển tập các báo cáo nghiên cứu về y học được đăng trên tạp chí y học Radiation Oncology cung cấp cho các bạn kiến thức về ngành y đề tài: Biological in-vivo measurement of dose distribution in patients’ lymphocytes by gamma-H2AX immunofluorescence staining: 3D conformal- vs. step-and-shoot IMRT of the prostate gland...

8p toshiba10 14-10-2011 49 3   Download

Understand the quantitative relationship between toxicant exposure and induced effects. • Describe frequently encountered toxic effects. • Interpret frequency (normal distribution) and dose response curves. • Understand threshold effects with dosage increase.

7p nguyenvanquan037 07-01-2011 69 5   Download

Distribution To be effective, concentrations of an antibacterial agent must exceed the pathogen's MIC. Serum antibiotic concentrations usually exceed the MIC for susceptible bacteria, but since most infections are extravascular, the antibiotic must also distribute to the site of the infection. Concentrations of most antibacterial agents in interstitial fluid are similar to free-drug concentrations in serum.

6p colgate_colgate 21-12-2010 72 3   Download

Brachytherapy Brachytherapy is the direct implantation of radioactive sources into the prostate. It is based on the principle that the deposition of radiation energy in tissues decreases as a function of the square of the distance from the source (Chap. 81). The goal is to deliver intensive irradiation to the prostate, minimizing the exposure of the surrounding tissues. The current standard technique achieves a more homogeneous dose distribution by placing seeds according to a customized template based on CT and ultrasonographic assessment of the tumor and computer-optimized dosimetry.

5p konheokonmummim 03-12-2010 83 3   Download

Clinical Implications of Drug Distribution Digoxin accesses its cardiac site of action slowly, over a distribution phase of several hours. Thus, after an intravenous dose, plasma levels fall, but those at the site of action increase over hours. Only when distribution is near-complete does the concentration of digoxin in plasma reflect pharmacologic effect. For this reason, there should be a 6–8 h wait after administration before plasma levels of digoxin are measured as a guide to therapy.

5p tubreakdance 26-11-2010 103 8   Download