Automatic localization of the prostatic urethra for image guided radiation therapy

Area of Science:

• Medical Imaging
• Radiation Oncology
• Urology

Background:

• Prostate cancer treatment with radiation therapy (RT) necessitates accurate targeting.
• Image-guided radiation therapy (IGRT) is crucial for focusing radiation and sparing organs at risk.
• Current IGRT methods for prostate cancer require effective prostate localization.

Purpose of the Study:

• To introduce a new urinary catheter designed for enhanced prostate localization in IGRT.
• To demonstrate the catheter's capability for automatic prostate localization using urethral imaging.
• To improve the precision and safety of radiation therapy for prostate cancer.

Main Methods:

• A urinary catheter with a contrast lumen was developed.
• Computerized tomography (CT) scans were performed with the contrast lumen empty and full.
• Digital subtraction was used for urethral autosegmentation.
• Ultrasound imaging with aerated gel provided continuous urethral visualization.

Main Results:

• The catheter facilitates imaging of the prostatic urethra.
• Automatic localization of the prostate for IGRT was achieved using urethral autosegmentation.
• Continuous urethral visualization under ultrasound was demonstrated.

Conclusions:

• This urinary catheter offers a novel approach for precise prostate localization in IGRT.
• The technology has the potential to enhance the accuracy and safety of prostate cancer radiation therapy.
• Urethral imaging via this catheter system improves image guidance for radiation oncology.