Journal of medical imaging and radiation sciences · 2026
A radiation therapist perspective on the use of a small gauge radiopaque catheter for urethral definition and dose escalation in prostate SBRT.
СтатьяНазвание и аннотация: Перевод в очереди
Обработка статьи · этапы, ошибки и управление
Загрузка состояния…
Ошибки и ограничения
История · было → стало
Состояние обновляется каждые 5 секунд, пока блок открыт. Процент показывается только там, где известен объём работы. Пауза останавливает продолжение этапа; текущий запрос к источнику может завершиться.
McAvena Sarah, Martell Kevin, Barta Radim, Nardo Mallory Di, Jordan Lliana, Clay Shane, Hancock Jason, Scott Matt, Liu Hong-Wei
Аннотация
INTRODUCTION/BACKGROUND: An increase in targeting accuracy for Stereotactic Body Radiation Therapy (SBRT) to the prostate allows for a reduction in Planning Target Volume (PTV). This can reduce treatment-related side effects. In this study, we used a small gauge radiopaque catheter as a fiducial marker for prostate SBRT treatment delivery. Preparation and early engagement of radiation therapists is critical to the success of a catheter-guided prostate SBRT program.
METHODS: This study included forty-two patients from two cancer centers in Alberta, Canada that underwent prostate SBRT treatment. The average patient age was 72 years old (69-76). Thirty-six (86%) received radical prostate SBRT with intraprostatic dose escalation and six (14%) received prostate SBRT as salvage therapy. A small gauge, balloonless, radiopaque catheter was inserted at CT Simulation and for each fraction. The catheter served as a fiducial marker to guide urethral sparing treatment plans, and during cone beam CT-guided (CBCT) image matching. CBCT scans were taken prior to each of two Volumetric Modulated Arc Therapy (VMAT) arcs during treatment delivery.
RESULTS: The radiopaque catheter was used as a reliable and accurate fiducial marker for image matching in prostate SBRT. Image matching guidelines were utilized as described in this paper. All patients tolerated the catheter without complications during treatment delivery.
DISCUSSION: This technique is feasible, well-tolerated, and may be beneficial for radiation oncology departments that do not have the resources for surgical implantation of gold seed fiducials.
CONCLUSION: Catheter-guided prostate SBRT is a feasible technique for urethral sparing in prostate SBRT with intraprostatic dose escalation. However, the benefit of intraprostatic dose escalation needs to be demonstrated more robustly to justify the additional department resources required for this technique.
PLAIN LANGUAGE SUMMARY: Radiation treatment for prostate cancer must be aimed very precisely to protect nearby parts of the body. This study tested using a thin catheter that can be seen on scans to help guide targeted radiation and checked how well people tolerated it. This study found that the catheter guided treatment accurately and was comfortable for everyone who received it. This matters because it offers a practical option for clinics that cannot use surgically placed markers and may help lower treatment side effects.
METHODS: This study included forty-two patients from two cancer centers in Alberta, Canada that underwent prostate SBRT treatment. The average patient age was 72 years old (69-76). Thirty-six (86%) received radical prostate SBRT with intraprostatic dose escalation and six (14%) received prostate SBRT as salvage therapy. A small gauge, balloonless, radiopaque catheter was inserted at CT Simulation and for each fraction. The catheter served as a fiducial marker to guide urethral sparing treatment plans, and during cone beam CT-guided (CBCT) image matching. CBCT scans were taken prior to each of two Volumetric Modulated Arc Therapy (VMAT) arcs during treatment delivery.
RESULTS: The radiopaque catheter was used as a reliable and accurate fiducial marker for image matching in prostate SBRT. Image matching guidelines were utilized as described in this paper. All patients tolerated the catheter without complications during treatment delivery.
DISCUSSION: This technique is feasible, well-tolerated, and may be beneficial for radiation oncology departments that do not have the resources for surgical implantation of gold seed fiducials.
CONCLUSION: Catheter-guided prostate SBRT is a feasible technique for urethral sparing in prostate SBRT with intraprostatic dose escalation. However, the benefit of intraprostatic dose escalation needs to be demonstrated more robustly to justify the additional department resources required for this technique.
PLAIN LANGUAGE SUMMARY: Radiation treatment for prostate cancer must be aimed very precisely to protect nearby parts of the body. This study tested using a thin catheter that can be seen on scans to help guide targeted radiation and checked how well people tolerated it. This study found that the catheter guided treatment accurately and was comfortable for everyone who received it. This matters because it offers a practical option for clinics that cannot use surgically placed markers and may help lower treatment side effects.