Abstract:Objective To study the effect of 2D/3D image registration on the extended distance of planning target volume (PTV) in the radiotherapy of nasopharyngeal carcinoma (NPC). Methods Using OBI system to obtain two-dimensional images (kV images and PV images) and three-dimensional images (CBCT images). Then registering 2D and 3D images by using DRR registration system and simulation positioning CT respectively to get the set-up errors of VRT, LNG, LAT. Then calculating the values of PTV extended distance of VRT, LNG, LAT with two kinds of PTV expansion formulas. Results The values of PTV extended distance between 2D and 3D images are different while there is no significance in registration errors among kV, PV, CBCT images (P>0.05). Conclusion Both of 2D images (kV images and PV images) and 3D images (CBCT images) can verify the radiation field well. 3D image errors can be analyzed with CBCT images, which can reduce the influence of set-up errors caused by image overlapping of 2D images.
马广栋,洪莉,王亮和. 2D/3D影像配准在鼻咽癌放疗中的应用[J]. 中国医疗设备, 2013, 28(10): 115-116.
MA Guang-dong, HONG Li, WANG Liang-he. Application of 2D /3D Image Registration in the Radiotherapy of Nasopharyngeal Carcinoma. China Medical Devices, 2013, 28(10): 115-116.
Stroom JC,Suzanne van Beek,Simon van Kranen,et al.First clinical experience with a multiple region of interest registration and correction method in radiotherapy of head and neck cancer patients[J].Radiother Oncol,2010,94(2):213-217.
[2]
Van Herk M,Kemeijer P,Lebesque JV.Inclusion of geometrical uncertainties in treatment plan evaluation[J].Int J Radiat Oncol Biol Phys,2002,52(5):1407-1422.
[1]
Stroom JC,Suzanne van Beek,Simon van Kranen,et al.First clinical experience with a multiple region of interest registration and correction method in radiotherapy of head and neck cancer patients[J].Radiother Oncol,2010,94(2):213-217.
[2]
Van Herk M,Kemeijer P,Lebesque JV.Inclusion of geometrical uncertainties in treatment plan evaluation[J].Int J Radiat Oncol Biol Phys,2002,52(5):1407-1422.