BC Cancer Radiation Oncologist Dr. Scott Tyldesley.

A new era for radiation therapy

Mounting evidence suggests precision radiation therapy leads to better outcomes for cancer patients

More than half of all people diagnosed with cancer need radiation therapy as part of their treatment. Over the last decade, mounting evidence has suggested that precision radiation therapy (PRT) can lead to better outcomes for patients with all types of cancer.

PRT uses specialized, highly-focused radiation techniques to cure cancer, prolong survival and increase quality of life. External beam PRT delivers radiation therapy to tumours from various positions around a person’s body, converging accurately on the tumour site.

“By delivering focused high doses of radiation over a shorter period of time, PRT limits the dose that healthy tissues surrounding the tumour receive, while increasing the dose to the tumour itself,” says BC Cancer Radiation Oncologist Dr. Scott Tyldesley.

Improving radiation therapy for children

Some 83% of Canadian children diagnosed with cancer survive and are at risk for long-term effects of radiation treatment. Because radiation therapy requires a high degree of accuracy, patients must remain perfectly still throughout treatment; this can be particularly challenging for children. Those who are especially “wiggly” undergo sedation, which comes with side effects, requires a longer procedure and the expertise of a specialized pediatric anesthesia team. Children traditionally also need more rigid immobilization and permanent tattoos which are used to mark the radiation targets on patients’ skin.

Real-time optical surface monitoring (OSM) is a precision tool that may eliminate the need for patients to be sedated, immobilization devices to keep patients still during treatment and permanent tattoos, while still maintaining accurate positioning.

While children stand to benefit the most from OSM, research suggests that OSM may be used in brain cancer patients as an alternative to more invasive procedures. “Our current goal is to support research projects into OSM that will lead to its adoption as standard of care at BC Cancer,” says Dr. Tyldesley.

Better results with fewer treatments

“Six Degrees of Freedom” Robotic Linac couches are essential for delivering precision radiation therapy and deliver complex techniques as efficiently as possible. Because the couches can move up, down, sideways and tilt in two directions, they allow for better positioning of the patient and targeting of the tumour.

For example, men with prostate cancer currently undergo 20-44 fractions of external beam radiotherapy (EBRT) over four to nine weeks, requiring patients to make many visits to BC Cancer. With support from BC Cancer Foundation donors, a clinical trial recently launched to compare EBRT with a new PRT technique that reduces the number of treatments to as few as five visits.

The results of this trial could potentially improve outcomes for a significant number of men in B.C.

As the benefitting charity of the 2019 Fairchild Miss Chinese Vancouver Pageant Gala Dinner, the Foundation is raising funds to bring a new piece of surface-guided radiation equipment to BC Cancer – Vancouver. To donate to this initiative and to learn more, please visit: https://bccancerfoundation.com/MCVP

Just Posted

The Capital Regional District is considering adding another dollar a year to the parkland acquisition fund fee for homeowners. (Black Press Media file photo)
One dollar or two? Greater Victoria parks acquisition fee hike spurs debate

$2 a year too steep, CRD committee recommends $1 a year increase per household

Vancouver Island-based Wilson’s Transportation has expanded to fill some of the routes left unserviced by Greyhound as of Nov. 1, 2018. (Black Press files)
B.C. bus companies say they need help to survive COVID-19

Like airlines, motor coaches have lost most of their revenue

Patrol officers from VicPD’s Esquimalt division responded to a call about hateful graffiti in Macaulay Park Wednesday evening. (Black Press Media file photo)
Anti-Semitic, hate-based graffiti found in Esquimalt park

Police seek suspects after fresh hate-based graffiti found Wednesday evening

Alyssa Gerwing, executive director of the Sidney Museum and Archives, gets into the Halloween spirit with a lit-up jack-o-lantern. With Treat Street cancelled, the Sidney Business Improvement Area Society has organized a series of other events and activities under the heading of Halloween Spooktacular. (Wolfgang Depner/News Staff)
Sidney serves up ghoulish spills and thrills during Halloween

A virtual Halloween treasure hunt and scary drive-in movies among tricks and treats

Artists, activists and supporters stand at the ‘More Justice, More Peace’ mural in Victoria’s Bastion Square after the letter ‘S’ was painted over in black. (Nina Grossman/News Staff)
ACAB removed from Victoria’s More Justice, More Peace mural

New message points to VicPD, City of Victoria for silencing BIPOC voices

A woman wears a face mask and plastic gloves while browsing books as a sticker on the floor indicates a one-way direction of travel between shelves of books at the Vancouver Public Library’s central branch, after it and four other branches reopened with limited services, in Vancouver, on Tuesday, July 14, 2020. (THE CANADIAN PRESS/Darryl Dyck)
B.C. reports 234 new COVID cases, 1 death of senior who had attended small birthday party

Roughly 5,700 people are isolating due to being exposed to a confirmed case

Burnaby RCMP responded to a dine-and-dash suspect who fell through a ceiling in March 2020. (RCMP handout)
VIDEO: Suspected dine-and-dasher falls through ceiling of Burnaby restaurant

A woman believed to be dashing on her restaurant bill fell through the kitchen ceiling

President Donald Trump speaks at a campaign rally in Allentown, Pa. on Oct. 26. (AP Photo/Alex Brandon)
POLL: How closely are you following the U.S. presidential election?

It may feel like it’s been going on forever but the U.S.… Continue reading

A can of Canada Dry Ginger Ale is shown in Toronto on Thursday Oct. 29, 2020. The maker of Canada Dry Ginger Ale has agreed to pay over $200,000 to settle a class-action lawsuit launched by a B.C. man who alleged he was misled by marketing suggesting the soda had medicinal benefits. THE CANADIAN PRESS/Joseph O’Connal
B.C. man’s lawsuit over marketing of Canada Dry ginger ale settled for $200K

Soda’s maker, Canada Dry Mott’s Inc., denied the allegations and any liability

A deer was spotted in October 2020 in Prince Rupert, B.C., with a bright pink yoga ball stuck in its antlers. (Kayla Vickers/Chronicles Of Hammy The Deer Official Page)
Hammy 2.0? Prince Rupert deer spotted with bright pink yoga ball stuck in antlers

The BC Conservation Officer Service is aware of the deer roaming around the city

RCMP. (Phil McLachlan - Black Press Media)
Kelowna Mountie hit with 2nd lawsuit in 2 months for alleged assault

Const. Julius Prommer is accused of breaking a woman’s knee during while responding to a noise complaint

Hirdeypal Batth, 24, has been charged with sexual assault and forcible confinement in relation to an incident in August 2020. (VPD handout)
Man, 24, charged with sex assault after allegedly posing as Uber driver in Vancouver

Investigators believe there could be more victims outside of the Vancouver area

Pilot Kevin Maher participated in a flyover of a ceremony at the Cobble Hill cenotaph on Oct. 22 in a 1940 North American (Noorduyn) Harvard aircraft. (Robert Barron/Citizen)
Cobble Hill remembers lost military members with ceremony, flyover

Annual event commemorates those who died in non-combat roles

Adam Ireton holds his son Weston, along with Kristen and Beckett as they celebrate Weston's last day of treatment for lukemia. (Kristen Ireton photo)
799 days: ‘Super’ Weston defeats cancer

‘Weston is disease-free now, so we will be going into a period of checkups and things until he’s 18’

Most Read