gtv

The fractional dose and volume of GTV are independent prognostic factors for the overall survival .

分次剂量和GTV体积为影响患者生存时间的独立预后因素。

Conclusion : MR was more accurate than CT in delineating GTV of NPC .

结论MRI组勾画靶区较CT组精确。

The GTV delineation of lung cancer 's PET-CT simulation

肺癌PET-CT模拟定位靶区勾画探讨

Comparison of Pathological T-staging with Gross Tumor Volume ( GTV ) of Esophageal Cancer by CT Scanning

食管癌肿瘤体积与病理T分期对照研究

Results The dose distribution in nasopharyngeal GTV and CTV were satisfactory both in CT simulated and conventional planning .

结果不论是CT模拟计划还是常规模拟计划，鼻咽GTV和CTV均可有满意的剂量分布。

To investigate the impact of gross tumor volume ( GTV ) on the short-term response of radiotherapy for esophageal carcinoma .

观察食管癌大体肿瘤体积（GTV）大小对放射治疗近期疗效的影响。

Conclusion PET / CT is useful for improving the accuracy of GTV delineation for the protection of the normal tissues during radiotherapy .

结论PET/CT图像融合能提高骨转移瘤GTV勾画的精确性和重复性，从而减少对周围正常组织损伤而增加放射治疗的增益比。

Results The follow up CT studies of 13 patients after completion of therapy 1-2 months showed a low attenuation area adjacent gross tumor volume ( GTV ) .

结果13例肝癌病例在放疗结束后1～2个月CT复查时，均在肝肿瘤区（Grosstumorvolume，GTV）周围出现宽窄不一、形状各异的低密度带。

[ Purpose ] To verify the reliability on usage of maximum intensity projection ( MIP ) protocols for rapid generation of gross tumor volume ( GTV ) .

[目的]验证在最大密度投影（MIP）软件自动生成融合图像上勾画大体肿瘤体积（GTV）的可靠性。

Objective : To study the accuracy between CT and MRI in delineating gross tumor volume ( GTV ) of nasopharyngeal carcinoma ( NPC ) in making radiotherapy plan .

目的探讨鼻咽癌放疗计划设计中CT和MRI确定肿瘤靶区（GTV）的价值比较。

And allows room for dose escalation . ( 3 ) The sparing advantage of organ at risk is not significantly in GTV / CTV > 20 % group .

当GTV/CTV>20%时，对危及器官的保护优势减小。

The bias of marginal dose and GTV mould were evaluated by analyzing the process of conforming GTV mould and manual multi-leaf conformer ( MLC ) .

分析手动多叶光栅（MLC）摆位及GTV模具制作过程，计算GTV模具误差及边缘剂量误差。

Then , the gross tumor volume ( GTV ), clinical target volume ( CTV ) and planned target volume ( PTV ) were delineated on every section of the CT scans .

然后在所有CT层面逐层勾画出鼻咽肿瘤的大体肿瘤体积（GTV）、临床靶体积（CTV）和计划靶体积（PTV）。

Results : All 25 patients completed the treatment successfully . The median radiation dose to the gross tumor volume ( GTV ) was 7012cGy ( 62 45 Gy 71 40 Gy ) .

结果：25例患者均顺利完成治疗，肿瘤中位剂量7012Gy（6245Gy～7140Gy）。

Objective To evaluate the role of integrated positron-emission tomography and computed tomography ( PET / CT ) in gross tumor volume ( GTV ) delineation for three-dimensional conformal radiotherapy for bone metastasis .

目的评价PET/CT图像融合在三维适形放射治疗骨转移瘤肿瘤靶区勾画中的作用。

Thanks to easy connections with GTV , Eurostar trains even offer two seasonal destinations : sunny Avignon during summertime and the French Alps in winter where you could enjoy the snowy slopes .

由于和TGV（巴黎至里昂间的城际特快）轻松对接，欧洲之星列车甚至提供了2个季节性的站点：在夏季可以送你到阳光遍地的阿维尼翁，在冬季可以送你到法国阿尔卑斯山领略雪山美景。

About the change range of GTV volume compared with its mean value in each patient , there were 28 % volume values larger than ± 20 % . ( 2 ) The testing volumes of wax ball change with WW and WL .

有28%的体积值与平均体积相比变动范围超过了±20%。（2）随窗宽窗位的变化，小球的测量体积也发生了改变。

At the end of radiotherapy , the parotid gland volume decreased to 90.1 % - 52.3 % compared with the volume before IMRT , gas cavity volume increased and took up to 3.7 % - 16.8 % of GTV at the beginning of radiotherapy .

结果放疗结束时腮腺体积为疗初的90.1%~52.3%，即腮腺体积缩小了9.9%~47.7%；GTV内气腔由疗前的0体积逐渐增加，疗终时气腔体积占GTV的3.7%~16.8%。

Results The results of treatment plan showed that the mean dose of covering gross tumor volume ( GTV )( D95 ) in the nasopharynx was 70.48 Gy and the mean volume of GTV1 ( V95 ) receiving the 95 % dose was 98.46 % .

结果治疗计划结果显示，覆盖鼻咽GTV1D95的平均剂量为70.48Gy，GTV1V95的平均体积为98.46%；

Objective To study the changes in gross tumor volume ( GTV ) and parotid gland volume during intensity modulated radiation therapy ( IMRT ) for head and neck cancer . Results The parotid gland volume decreased , and gas volume in the GTV increased throughout the course of IMRT .

目的研究头颈部癌患者在放疗过程中腮腺体积及GTV变化。