Medical CT, on the other hand, yielded significantly higher radiation exposure, with an average effective dose exceeding 500 渭Sv, emphasizing its need for specific clinical scenarios. Conclusion: In conclusion, the choice between CBCT and Medical CT for dental applications should be made with ...
A joint learning framework for multisite CBCT-to-CT translation using a hybrid CNN-transformer synthesizer and a registration network Background: Cone-beam computed tomography (CBCT) is a convenient method for adaptive radiation therapy (ART), but its application is often hindered by its ... Y ...
Radiation exists in many forms, not all of which are ionizing, the form that poses a risk to human health. Radiation is defined in part by its wavelength. Low frequency radiation, such as radio waves, thermal/microwaves, infrared, and visible light waves are of too low penetrating power to...
【摘要】目的 比较分析应用CT加速器系统(CTVision)和千伏级锥形束CT(Cone-Beam Computer Tomography,CBCT)图像引导放疗技术校正鼻咽癌在放疗中摆位误差的差异性.方法 选取2015年1月~2016年8月收治的行调强放疗(Intensity Modulated Radiation Therapy,IMRT)的鼻咽癌患者30例,均采用U型热塑性面罩固定体位,将患者随机分为...
目的 探讨经桡动脉途径、锥形束CT(cone beam computed tomography,CBCT)三维血管重建辅助的精细经导管肝动脉化疗栓塞(transcatheter arterial chemoembolization,TACE)治疗原发性肝癌的安全性和可行性。方法 回顾性收集2018年5月至2019年12月期间于笔者所在医院经桡动脉途径进行精细TACE治疗的124例原发性肝癌患者的临床资料...
方法回顾分析2016年间收治的14例乳腺癌保乳术后放疗患者的锥形束CT影像,分别测量胸壁以及每个钛夹在放疗过程中的误差。将钛夹的位移与钛夹的相对位置、乳腺体积、胸壁切线垂直距离以及乳腺最大厚度等因素进行Pearson相关性分析。 结果胸壁系统误差和随机误差在左右、头脚、前后方向分别为4.42、3.44、5.13 mm和3.55、3.07...
These influencer structures were generated using an AI-based proprietary algorithm from Varian and corrected by the radiation oncologist for each adaptive session. The six adaptive cases included three prostate bed and lymph (LN) nodes cases, one prostate bed case; one prostate, seminal vesicles (...
radiation therapysurgerytumours/ dosimetric effectsmanual cone-beam CT matchingmutual information metricsspinal radiosurgery patientsdatasetsvector displacementRadiosurgical treatment of cranial or extracranial targets demands accurate positioning of the isocenter at the beam and table isocenter, and immobilization ...
CBCT is a compact, faster and safer version of the regular CT. Through the use of a cone shaped X-Ray beam, the size of the scanner, radiation dosage and time needed for scanning are all dramatically reduced.A typical CBCT scanner can fit easily into any dental (or otherwise) practice ...
CT is an established method for acquiring the true volumetric mass density and differentiating cortical and trabecular bones6,7. However, because of the high cost, high radiation exposure to patients, and large footprint, medical CTs are not generally available in small dental clinics. Cone beam ...