Clinical Radiation Physics Service

我们已经建立了常规动态调强放射治疗（dIMRT）。这是IMRT治疗中最复杂的，需要大量的治疗前验证以确保准确执行。这些治疗使用我们的双Clinac-21EX加速器进行。通过螺旋断层治疗提供治疗的Hi-ART系统（Tomotherapy Inc.）已经安装、接受并正在治疗患者。该系统为ROB提供了尖端的治疗技术，以支持未来的临床试验。我们已经开始了一系列的计划，我们的核子高剂量率后置器（HDR）使用一个小的，高强度的192Ir源进行间质和腔间近距离治疗。最老的Clinac-21EX加速器已被新机器所取代，这台新机器是最先进的瓦里安TrueBeam STX。该加速器将配备新的高清晰度多叶片准直器，叶片宽度薄至2.5毫米。这将使其能够进行无框架立体定向放射手术（SRS），尽管在收购中包括一组直径从4mm到25mm的圆形准直器和SRS规划模块。患者躺椅还提供6个自由度（6DOF），除了传统的纵向、横向和垂直位置调整外，还允许对俯仰、侧滚和偏航进行校正，从而大大提高定位精度。这台机器包括边缘颅外SABR包，将允许单位提供无框立体定向身体放射治疗（SBRT），使用先进的运动管理，基于射频局部定位，使用植入的基准转发器和红外摄像机。修订后的Edge软件包包括一个Calypso射频定位系统，利用可植入的基准传感器和实时跟踪能力。ROB正在收购第二个TrueBeam STX设备，以取代其RapidArc Clinac-21EX。

We have instituted routine dynamic Intensity Modulated Radiation Therapy (dIMRT). This is the most complex of IMRT treatments and requires considerable pre-treatment verification to ensure accurate execution. These treatments are delivered using our twin Clinac-21EX accelerators. A Hi-ART system (Tomotherapy Inc.) for delivering treatments via helical tomotherapy has been installed, accepted and is currently treating patients. This system provides ROB with cutting edge treatment technology to support future clinical trials. We have started a series of initiatives with our Nucletron High Dose-Rate Afterloader (HDR) using a small, high intensity 192Ir source for interstitial and intercavitary brachytherapy. The oldest Clinac-21EX accelerator has been replaced with a new machine is a state-of-the-art Varian TrueBeam STX. This accelerator will be equipped with the new high definition multi-leaf collimator with leaf widths as thin as 2.5 mm. This will render it capable of performing frameless stereotactic radiosurgery (SRS), although a set of circular collimators with diameters ranging from 4mm to 25mm and an SRS planning module are included in the acquisition. The patient couch also provides 6 Degrees-of-Freedom (6DOF) to greatly improve positioning accuracy by permitting corrections for pitch, roll and yaw, in addition to the traditional longitudinal, lateral and vertical position adjustments. This machine includes the Edge Extracranial SABR Package that will permit the unit to deliver frameless stereotactic body radiation therapy (SBRT) using advanced motion management based on radiofrequency local positioning using implanted fiducial transponders and infrared cameras. The revised Edge package includes a Calypso radiofrequency positioning system, utilizing implantable fiducial transducers and real-time tracking capability. ROB is in the process of acquiring a second TrueBeam STX unit to replace its RapidArc Clinac-21EX.