Yin Zhao-Sheng, Tang Shi-Qiang, Shi Jun-Wen, Chen Fen, Li Zi-Wei, Wu Jia-Ming, Jen Yee-Min
Chenzhou No.1 People's Hospital.
J Appl Clin Med Phys. 2016 Jan 8;17(1):428–439. doi: 10.1120/jacmp.v17i1.5833.
The construction of a conventional prostate needle (seeds) implant template restricts needles tilting or incline insertion when it is necessary to approach a seminal vesicle or to avoid the obstruction of symphysis pubis. To overcome the disadvantages of conventional templates, we developed a special template for guiding needles incline insertion and fixation for prostate needle implant. Phantom needles implantation was performed. Two acrylic boards, each 7.5 cm in width by 7.5 cm in length and 0.5 cm thickness, were drilled with a set of domed holes and cones with embedded template ball inside this combination to provide firm grip and fixation in prostate needle implantation. The specially designed domed-cones combination acrylic board provides a needle of up to 60° rotation flexibility application. Some areas that could not be covered in a conventional parallel needle holes template could now be covered by using this new template. The covering index of prostate radiation dosage is up to 84.5%. The specially designed domed-cones acrylic board combination provides not only a reliable means of needle fixation and rotational function, but also a superior dose distribution in the anterior portion of the prostate and good coverage of a seminal vesicle. This special template is a feasible design for prostate needles or seeds implant brachytherapy.
传统前列腺穿刺针（粒子）植入模板的构造限制了穿刺针在需要接近精囊或避免耻骨联合阻碍时的倾斜或斜向插入。为克服传统模板的缺点，我们开发了一种特殊模板，用于引导前列腺穿刺针的斜向插入及固定。进行了模拟针植入。两块丙烯酸板，每块宽7.5厘米、长7.5厘米、厚0.5厘米，钻有一组圆顶孔和圆锥，在此组合内部嵌入模板球，以便在前列腺穿刺针植入时提供牢固的握持和固定。这种特殊设计的圆顶 - 圆锥组合丙烯酸板可使穿刺针实现高达60°的灵活旋转应用。一些传统平行针孔模板无法覆盖的区域现在可以通过使用这种新模板来覆盖。前列腺放射剂量的覆盖指数高达84.5%。这种特殊设计的圆顶 - 圆锥丙烯酸板组合不仅提供了可靠的穿刺针固定方式和旋转功能，还在前部前列腺区域实现了更好的剂量分布，并对精囊有良好的覆盖。这种特殊模板对于前列腺穿刺针或粒子植入近距离放射治疗是一种可行的设计。
