dose distribution वाक्य
उदाहरण वाक्य
मोबाइल
- Over many years individuals have endeavoured to measure absorbed radiation dose distributions using gels.
- In modern radiation therapy, 3D dose distributions are typically created in a computerized CT scan.
- The polymer construction and linear radioactive distribution of this source creates a very homogenous dose distribution.
- In addition, conventional radiotherapy can also deliver similar dose distributions utilizing modern computer dosimetry planning and equipment.
- In radiation therapy, three-dimensional dose distributions are often evaluated using the dosimetry technique known as gel dosimetry.
- CT-based planning allows physicians to more accurately determine the dose distribution using axial tomographic images of the patient's anatomy.
- Now we can put them in very precisely to give the best possible dose distribution, without opening up the patient,
- This allows for better dose distribution within the breast while minimizing dose to healthy organs such as the lung or heart.
- The X-rays penetrated beyond the tumor bed to the normal tissues beneath, had poor dose distributions, and took a relatively long time to administer.
- It was subsequently shown that irradiated Fricke-type gel dosimeters did not retain a spatially stable dose distribution due to ion diffusion within the irradiated dosimeters.
- This type of gel dosimeter did not have the associated diffusion problem of Fricke gels and was shown to have a relatively stable post-irradiation dose distribution.
- Level 3 techniques such as VMAT utilise inverse planning to provide further improved dose distributions ( i . e . better coverage of target tumours and sparing of healthy tissue ).
- The dose distribution imparted by a CT scan is much more homogeneous than that imparted by radiography, but is still somewhat larger near the skin than in the centre of the body.
- While the shielding costs and the cost and weight of the equipment compared favorably with conventional electron accelerators, dose distributions were inferior; treatment times were longer; and bones received a higher radiation dose.
- The mission marked the first flight of an 11-pound human skull, which served as the primary element of " Detailed Secondary Objective 469 ", also known as the In-flight Radiation Dose Distribution ( IDRD ) experiment.
- The F mode exhibits very important characteristics, which in combination with the other three photoionization modes makes possible the generation of a wide range of dose distributions, expanding the application range of lasers in the domain of material processing.
- The "'proximity effect "'in electron beam lithography ( EBL ) is the phenomenon that the exposure dose distribution, and hence the developed pattern, is wider than the scanned pattern, due to the interactions of the primary beam electrons with the resist and substrate.
- DVHs were introduced by Michael Goitein ( who introduced radiation therapy concepts such as the " beam's-eye-view, " " digitally reconstructed radiograph, " and uncertainty / error in planning and positioning, among others ) and Verhey in 1979 . DVH summarizes 3D dose distributions in a graphical 2D format.
- The dose distribution in the patient is dependent on the anatomy and beam modifiers such as wedges, specialized collimation, field sizes, tumor depth, etc . The information from a prior CT scan of the patient allows more accurate modelling of the behaviour of the radiation as it travels through the patient's tissues.
- In 1965, the modern era of IOERT began in Japan at Kyoto University where patients were treated with electrons generated by a betatron Compared with other forms of IORT such as orthovoltage X-ray beams, electron beams improved IOERT dose distributions, limited penetration beyond the tumor, and delivered the required dose much more rapidly.
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