Clinical Radiation Physics Service

我们制定了常规动态调强放射治疗（dIMRT）。这是最复杂的调强放射治疗，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-21 EX加速器进行。Hi-ART系统（Tomotherapy Inc.）用于通过螺旋断层放射疗法进行治疗的装置已经安装、接受并且目前正在治疗患者。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倡议与我们的Nucletron高剂量率后装机（HDR）使用一个小，高强度192 Ir源间质和腔内近距离放射治疗。最旧的Clinac-21 EX加速器已被最先进的Varian TrueBeam STX新机器取代。该加速器将配备新的高清晰度多叶准直器，其叶片宽度薄至2.5 mm。这将使其能够执行无框架立体定向放射外科手术（SRS），尽管采集中包括一组直径范围为4 mm至25 mm的圆形准直器和SRS计划模块。除了传统的纵向、横向和垂直位置调整之外，患者治疗床还提供6自由度（6DOF），通过允许俯仰、滚动和偏航校正来大大提高定位精度。该机器包括Edge颅外SABR包，允许该装置使用基于射频局部定位的高级运动管理（使用植入的基准应答器和红外摄像机）提供无框架立体定向体部放射治疗（SBRT）。修改后的边缘包包括一个Calypso射频定位系统，利用植入式基准传感器和实时跟踪能力。ROB正在采购第二台TrueBeam STX装置，以取代其RapidArc Clinac-21 EX。

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.