Burgess Hill, United Kingdom
Burgess Hill, United Kingdom

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Patent
Elekta Ltd | Date: 2016-07-26

A radiotherapy apparatus and method, comprising a source of radiation for delivering pulses of radiation at a base frequency; and a control unit configured to generate a time-averaged power level of x by generating an n^(th )pulse when n is equal to the rounded value of an integer multiple of 1/x, where x is a value between 0 and 1 representing a proportion of a maximum power output of the radiotherapy apparatus. The pulses may form a repeating pulse train pattern, and the control unit may comprise a processing unit configured to provide a pulse train pattern having a number of available slots, the slots being marked as a permitted pulse or a suppressed pulse.


Patent
Elekta Ltd | Date: 2017-02-01

A radiotherapy apparatus, and a related method, comprising a source of radiation able to issue pulses of radiation at a base frequency, and a control apparatus arranged to achieve a time-averaged power level of x, where x is a value between 0 and 1 representing a proportion of a maximum power output of the apparatus, by permitting an n^(th) pulse if n is equal to the rounded value of (an integer times 1/x). The pulses may form a repeating pulse train pattern, and the control apparatus may comprise a processing unit, the processing unit being configured to provide a pulse train pattern having a number of available slots, M, each slot being marked as a permitted pulse or a suppressed pulse, the processing unit being configured to generate such a pulse train pattern with a selected number of permitted pulses, Q, by: i) dividing M by Q to calculate a factor P; ii) calculating a series of incremented multiples of P, P_(N) = NP, until N = Q, where N increments from one; iii) rounding the values of P_(N) to produce a set of values R_(N); and iv) marking each pulse train slot so that slot positions which correspond to the values of R_(N) are marked as permitted pulses, and all other slot positions are marked as suppressed pulses.


Patent
Elekta Ltd | Date: 2016-12-14

In a fractionated radiotherapy treatment, once the first fraction is complete and has been verified, there exists a body of data which is representative of the dose development during delivery of the treatment for that patient and that treatment plan. This can therefore be used as a comparator for the instantaneous doses observed during subsequent fractions. This allows real-time dosimetry verification for the second and subsequent fractions after a successful first fraction.


Patent
Elekta Ltd | Date: 2016-06-10

Embodiments of the present disclosure provide improved techniques for dosimetry in radiotherapy treatment. In a fractionated radiotherapy treatment, once the first fraction is complete and has been verified, data is generated which is representative of the dose development during delivery of the treatment for that patient and that treatment plan. This data can be used as a comparator for the instantaneous doses observed during subsequent fractions, allowing real-time dosimetry verification for the second and subsequent fractions after a successful first fraction.


Patent
Elekta Ltd | Date: 2016-06-10

Embodiments of the present disclosure provide improved techniques for dosimetry in radiotherapy treatment. In a fractionated radiotherapy treatment, the expected dose buildup is computed in advance of a fraction delivery based on the instructions in the treatment plan. The progress of the fraction is then monitored using an electronic portal image detector (EPID), and fluence data from the EPID used to calculate an estimate of the actual dose build-up in real time. This estimate can be compared to the expected dose buildup in order to validate the fraction.


Patent
Elekta LTD | Date: 2015-05-01

Various implementations of the invention provide techniques and supporting systems that facilitate real-time or near-real-time ultrasound tracking for the purpose of calculating changes in anatomical features during a medical procedure. More specifically, anatomical features within a patient undergoing a medical procedure are tracked by obtaining temporally-distinct three dimensional ultrasound images that include the feature of interest and obtaining a targeted subset of ultrasound images focused on the feature. Based on the targeted subset of ultrasound images, a displacement of the feature is determined and image parameters used to obtain the targeted subset of ultrasound images are adjusted based on the displacement. This results in a time-based sequence of three dimensional images and targeted ultrasound images of the feature that identify changes in the position, size, location, and/or shape of the feature.


Patent
Elekta Ltd | Date: 2016-05-04

We disclose a radiotherapy apparatus with a dose verification system in which the portal image is displayed against a background of a better-quality image diagnostic image, such as a two-dimensional radiograph, an ultrasound image, or a section taken from a three-dimensional magnetic-resonance image, cone-beam CT image, or the like.


Patent
Elekta Ltd. | Date: 2016-03-09

A displacement of a lesion within a patient is determined for the purpose of administering radiation treatment by generating sets of surface elements from three-dimensional images of the lesion taken at different times. Weights are assigned to the surface elements, and based on weights and the proximity of corresponding elements in one set to elements in another set, a displacement is determined.


Patent
Elekta Ltd | Date: 2016-12-14

In a fractionated radiotherapy treatment, the expected dose buildup is computed in advance of a fraction delivery based on the instructions in the treatment plan. The progress of the fraction is then monitored using the EPID, and the fluence data from the EPID used to calculate an estimate of the actual dose build-up in real time. This can be compared to the expected dose buildup in order to validate the fraction.


Patent
Elekta Ltd | Date: 2016-08-31

A method of integrating a first computer (120) and a second computer (110) is disclosed. The first computer executes a software application (125) having a graphical user interface. The second computer renders (506) the graphical user interface, receives (508) an identification of an event that has occurred in the software application, and identifies (510) an action to be performed by the second computer in response to the occurrence of the event, the action being identified from a predefined sequence of actions. The second computer performs (512) the identified action to modify the rendering of the graphical user interface.

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