Figure 1

Intraoperative real-time treatment planning. (a) Three-dimensional reconstruction of the prostate, organs at risk (i.e., rectum, urethra, bladder), in situ needles and the intraprostatic source dwell positions as calculated using SWIFT for the final treatment plan. Contour definition for rectum extended 10 mm cranially from the prostatic base and 10 mm caudally from the prostatic apex. Urethra contouring encountered the intraprostatic urethra marked by the insertion of a three-way Foley catheter and extended by 5 mm caudally to include the apical urethra membrane. (b) Isodose distribution after anatomy-based dose optimisation. The isodose colour code convention is: dark red = 300% {isodose = 28.5 Gy}; orange = 200% {isodose =19.0 Gy}; yellow = 150% {isodose = 14.25 Gy}; turquoise = 100% {isodose = 9.5 Gy}. The 100% isodose was set to encompass the red delineated prostate capsule.