Accuracy

Accuracy

CyberKnife Radiosurgery

One-millimeter accuracy protects surrounding tissues

External Beam Radiotherapy(EBRT)

 

Intensity-Modulated Radiotherapy(IMRT)

Target area is expanded to include the prostate plus 5-10 millimeters to account for uncertainty

 

Calypso-Guided EEBRT/IMRT

Target area is expanded to include the prostate plus approximately 5 millimeters to account for uncertainty

High-Dose-Rate(HDR)Brachytherapy

Custom radiation plan delivers radiation dose to within 2-3 millimeters of the target, which spares surrounding tissues

Low-Dose-Rate(LDR)Brachytherapy(Seed Implant)

Seeds positioned with 3-5 millimeters accuracy; occasionally some seeds migrate to the lung(s)

 

 

Correcting for movement

Method of targeting/tracking

CyberKnife Radiosurgery

Throughout treatment robot automatically adjusts for any movement or rotation

Robot autmotatically locates fiducials

External Beam Radiotherapy(EBRT)

 

Intensity-Modulated Radiotherapy(IMRT)

Technician manually adjusts prior to each treatment session; no real-time correction for any movement or rotation during treatment

Patient's skin is marked and therapist aligns on those two marks, or targets fiducials using X-ray images

 

Calypso-Guided EEBRT/IMRT

If movement exceeds error threshold (3 mm), treatment stops and technician manually adjusts treatment table; no correction for rotation

Radio-frequency detector determines beacon location. Therapist manually adjusts treatment table accordingly

High-Dose-Rate(HDR)Brachytherapy

Physician manually places catheters using ultrasound images for guidance; a customized treatment plan accounts for variation in catheter position

Ultrasound probe placed in rectum visualizes prostate and needle/catheter position

Low-Dose-Rate(LDR)Brachytherapy(Seed Implant)

Physician manually places needles using ultrasound images for guidance; no corrections possible after seeds have been implanted

Ultrasound probe placed in rectum visualizes prostate and needle/seed position

 

Contact Information

Radiosurgery Center
550 17th Ave.
Suite A10
Seattle, WA 98122
Phone: 206-320-7130
Fax: 206-320-7137
Office Hours: Monday-Friday. 8 a.m.-4:30 p.m
Map & Directions

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