Health & Fitness Four new high-tech radiotherapy systems for Dorset

09:15  01 august  2021
09:15  01 august  2021 Source:   heatworld.com

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systems for radiotherapy . In 1997–2002, the serial production of the SL-75-5-MT linear accelerator based on obsolete appa-. ratus from the Philips Company (Netherlands) was organized at the Efremov Research Institute of Electrophysical Apparatus. Additional development of the system . and technical testing are planned in 2020 and clinical trials and serial production in 2021, which should meet the domestic. market demand for such remote radiotherapy systems and therefore increase accessibility and quality of treatment for oncol

Please note that terms and conditions apply. High spatial resolution dosimetric response maps for radiotherapy ionization chambers. Physics in Medicine & Biology. High spatial resolution dosimetric. response maps for radiotherapy ionization. I. EGSnrc, the new EGS 4 version Med.

a group of people standing in a room © University Hospitals Dorset

Cancer patients are benefiting from ultra-precise cancer treatments thanks to a new state-of-the-art system that provides clinicians with a 3D body ‘map’.

University Hospitals Dorset’s radiotherapy teams’ two new surface-guided radiotherapy treatment systems are among only a handful available in the NHS and the first in the south west. They use special cameras to detail the contours of a patient’s skin to allow more precisely-targeted treatment during radiotherapy.

Radiotherapy is a procedure in which a beam of radiation is aimed at a tumour to kill it. As it can damage non-cancerous cells, the procedure involves complex planning to ensure the right dose is delivered at the exact site it is needed.

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NHSRC, New Delhi NHSRC, New Delhi NHSRC, New Delhi NHSRC, New Delhi NHSRC, New Delhi NHSRC, New Delhi NHSRC, New Delhi NHSRC, New Delhi. INTRODUCTION. Medical devices are a very important part of health care and their use is increasing by the day. National Health Systems Resource Centre which is also a WHO collaborating centre for priority medical devices & health technology policy; in consultation with experts has formulated technical specifications for commonly used medical devices.

This study compares high - tech EBT against high - tech BT. Methods and materials: Nine patients were selected with locally advanced cervix cancer, representing typical clinical situations according to initial tumor extension and response after EBT. Patients were treated either with intracavitary, combined interstitial/intracavitary, or complex interstitial BT. Gross tumor volume, high-risk clinical target volume (CTV), intermediate-risk CTV, bladder, rectum, and sigmoid were delineated. Magnetic resonance-guided BT planning was manually optimized with respect to organ dose limits. Margins (3 and 5 mm)

A small tattoo is typically used to denote the target site, which can remain visible after treatment and can carry its own psychological impact, which this technology will put an end to.

The high tech cameras create a skin ‘map’ in real time, and combined with detailed treatment planning scans previously taken, a target site is ‘locked’ so that if a patient – and their tumour – moves, it turns off the beam. The monitoring system is so sophisticated that it can detect movement of a fraction of a single millimetre.

a person standing in a room: Photo shows a woman using the radiotherapy machine. Thin red lines are shown tracking her movement. © Credits: University Hospitals Dorset Photo shows a woman using the radiotherapy machine. Thin red lines are shown tracking her movement.

The systems are being initially used to target the pelvic region, including rectal and gynaecological cancers, as well as breast cancer, before being rolled out to all cancers.

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Technical specifications of radiotherapy . equipment for cancer treatment. An important consideration for a new radiotherapy department is deciding on a scale convention for the movements of the various components of the treatment units. There are two IEC scale conventions in clinical use, namely an outdated IEC 60601 scale convention and a more recently released IEC 61217 scale convention (17).

Highly accurate systems have been developed first for intracranial radiotherapy (10,11) and radiosurgery (12) and later extended to extracranial radiotherapy applications. (13)(14)(15)(16)(17) The main advantage of these systems is a high accuracy of isocenter correlation. In head-and-neck radiotherapy , immobilization (44) and optical-guidance systems (45)(46)(47) can greatly reduce the need for image guidance, but may not eliminate it completely (48). Optical guidance is accomplished through detection of four passive markers that are attached to a custom bite plate that links to the

Two surface-guided systems are now in use, with a further two joining them shortly, at Poole Hospital and The Robert White Centre, at Dorset County Hospital, in Dorchester.

The centre is named after multi-millionaire businessman Robert White, who gifted Poole Hospital more than £10m to advance cancer treatment in the county before his death in 2015. The Robert White Legacy Fund, a charity set up to allocate Robert’s incredible legacy to appropriate projects, gave £900,000 to purchase the four systems.

John Naylor, radiotherapy physicist at University Hospitals Dorset said:

“When we’re planning radiotherapy treatment, we spend many hours optimising each patient’s treatment plan to achieve the correct dose of radiation to the tumour

“All those calculations and precise planning rely on a patient remaining extremely still during the process, at the point they are receiving their radiotherapy.

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Having commissioned the IMRT system , one must perform checks on the treatment for individual patients, and one must carry out routine quality assurance procedures for the ongoing integrity of the IMRT system . The payers of IMRT insurance claims have required that individual measurements of • Greater penetration compared to lower energy X-rays, which helps in delivering a higher proportion of dose to the deep tumour compared to the surface dose. • Skin sparing effect – the maximum absorbed dose is deposited a few millimetres beneath the skin. This helps to deliver higher dose to depth

High precision radiotherapy has been a hot issue to radiation oncologists for the last 100 years. Introduction of mega volt machine with linear accelerators changed the paradigm of radiotherapy , and development of computers and three-dimensional treatment opened the new era of high tech Linear accelerator has been a firm base for such an evolution to high tech radiotherapy . It is the machine which is used most frequently for stereotactic radiosurgery, image-guided and respiratory gated radiotherapy and this review will introduce the basic concepts of this linac-based high precision

“This is why you will see in use what can be very extensive shells, or masks, covering the whole head and neck, for example, to try to limit a patient’s ability to move.”

The new technology will mean patients having to use these highly restrictive ‘closed’ masks and shells less and less, making it a more pleasant experience.

“This technology means we’re more confident that we can deliver the treatment plan more precisely,” added Josh.

“It will also eventually remove the need for a physical tattoo. Some patients, when we follow up with them, say that these marks are an unwelcome reminder of a difficult period in their lives and continues to cause them great stress, sometimes years after treatment and especially where it may be visible to others.

“Surface-guided radiotherapy is an incredible step forward for us, and I’m delighted that not only are we one of a handful of NHS radiotherapy services using this technology today in the UK, but that it has been made possible by Robert White and the incredible Robert White Legacy Fund to further cancer care in the county.”

For more information on The Robert White Legacy Fund visit www.poolehospitalcharity.co.uk/robert-white-legacy-fund/

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This is interesting!