Accuracy and Precision of a Veterinary Neuronavigation System for Radiation Oncology Positioning

Conformal radiation treatment plans such as IMRT and other radiosurgery techniques require very precise patient positioning, typically within a millimeter of error for best results. CT cone beam, real-time navigation, and infrared position sensors are potential options for success but rarely present in veterinary radiation centers. A neuronavigation system (Brainsight Vet, Rogue Research) was tested 22 times on a skull for positioning accuracy and precision analysis. The first 6 manipulations allowed the authors to become familiar with the system but were still included in the analyses. Overall, the targeting mean error in 3D was 1.437 mm with SD 1.242 mm. This system could be used for positioning for radiation therapy or radiosurgery.

Download Full-text

First Clinical Application of MV Cone-Beam CT: Patient Positioning During Radiation Treatment

International Journal of Radiation Oncology*Biology*Physics ◽

10.1016/j.ijrobp.2005.07.601 ◽

2005 ◽

Vol 63 ◽

pp. S351-S352 ◽

Cited By ~ 2

Author(s):

A. Gillis ◽

M. Bucci ◽

M. Aubin ◽

O. Morin ◽

J. Chen ◽

...

Keyword(s):

Clinical Application ◽

Radiation Treatment ◽

Cone Beam Ct ◽

Patient Positioning ◽

Cone Beam

Download Full-text

Inclusion of the dose from kilovoltage cone beam CT in the radiation therapy treatment plans

Medical Physics ◽

10.1118/1.3271582 ◽

2009 ◽

Vol 37 (1) ◽

pp. 244-248 ◽

Cited By ~ 54

Author(s):

Parham Alaei ◽

George Ding ◽

Huaiqun Guan

Keyword(s):

Radiation Therapy ◽

Cone Beam Ct ◽

Cone Beam ◽

Treatment Plans ◽

Therapy Treatment

Download Full-text

Patient Positioning Accuracy in Stereotactic Radiosurgery With Mask Fixation and Cone Beam CT

International Journal of Radiation Oncology*Biology*Physics ◽

10.1016/j.ijrobp.2017.06.2383 ◽

2017 ◽

Vol 99 (2) ◽

pp. E740-E741 ◽

Cited By ~ 1

Author(s):

Y. Xu ◽

J.S. Silverman ◽

K.L. Du ◽

I.J. Das ◽

D. Kondziolka

Keyword(s):

Stereotactic Radiosurgery ◽

Cone Beam Ct ◽

Patient Positioning ◽

Cone Beam ◽

Positioning Accuracy

Download Full-text

Interobserver Comparison on Patient Positioning Using 4 Different Computed Tomography Datasets for Image Registration With Cone Beam Computed Tomography in Lung Stereotactic Body Radiation Therapy

International Journal of Radiation Oncology*Biology*Physics ◽

10.1016/j.ijrobp.2016.06.2293 ◽

2016 ◽

Vol 96 (2) ◽

pp. E665

Author(s):

M. Oechsner ◽

B. Chizzali ◽

M. Devecka ◽

J. Wilkens ◽

S.E. Combs ◽

...

Keyword(s):

Computed Tomography ◽

Radiation Therapy ◽

Image Registration ◽

Cone Beam Computed Tomography ◽

Stereotactic Body Radiation Therapy ◽

Patient Positioning ◽

Cone Beam ◽

Stereotactic Body Radiation

Download Full-text

A Visual Analytics Dashboard to Summarize Serial Anesthesia Records in Pediatric Radiation Treatment

Applied Clinical Informatics ◽

10.1055/s-0039-1693712 ◽

2019 ◽

Vol 10 (04) ◽

pp. 563-569

Author(s):

Olivia Nelson ◽

Brian Sturgis ◽

Keri Gilbert ◽

Elizabeth Henry ◽

Kelly Clegg ◽

...

Keyword(s):

Radiation Therapy ◽

Radiation Oncology ◽

Visual Analytics ◽

Radiation Treatment ◽

Airway Device ◽

Vertical Line ◽

Recovery Score ◽

Patient Will ◽

Typical Day ◽

High Level

Background Young children who undergo radiation therapy may require general anesthesia to remain still during weeks of radiation sessions. On a typical day at our hospital, an anesthesia team will care for 10 patients in the radiation therapy suite, and each patient will have multiple prior anesthetic records. Daily review of prior anesthesia records is important to maintain anesthetic consistency and to identify potential improvement, yet our electronic health record (EHR) made such review time-consuming and cumbersome. Objectives This article aims to design a visual analytics interface that simultaneously displays data from multiple anesthesia encounters to support clinical consistency in medications and airway management. Methods Documentation from the EHR is available in the clinical data warehouse following daily backups. A visual analytics interface was built to aggregate important components of multiple anesthesia encounters in pediatric radiation oncology on a single screen. The application was embedded in the EHR's anesthesia module and updated daily. Results Each anesthesia encounter was represented by a vertical line with the date at the bottom of the screen. Each vertical line was divided into sections corresponding to the medications, type of airway device, type of radiation oncology procedure, days between treatments, and recovery score and time. Information about the medications, airways, and procedures was shown with icon legends. This layout enabled users to quickly see the key components of multiple anesthetics and make inferences between, for example, the medications used and the recovery score. Conclusion The dashboard provides a high-level summary of all radiation therapy anesthesia records for children receiving recurrent treatments. In this clinical scenario, it is desirable to replicate an optimal anesthetic approach for daily or near-daily treatments or adjust the anesthetic based on observed patterns.

Download Full-text

Advances in Image-Guided Radiation Therapy

Journal of Clinical Oncology ◽

10.1200/jco.2006.09.9515 ◽

2007 ◽

Vol 25 (8) ◽

pp. 938-946 ◽

Cited By ~ 278

Author(s):

Laura A. Dawson ◽

David A. Jaffray

Keyword(s):

Radiation Therapy ◽

Radiation Oncology ◽

Planning Process ◽

Radiation Treatment ◽

Healthy Tissue ◽

Tumor Control ◽

Computer Assisted ◽

Image Guided Radiation Therapy ◽

Image Guided ◽

Radiation Delivery

Imaging is central to radiation oncology practice, with advances in radiation oncology occurring in parallel to advances in imaging. Targets to be irradiated and normal tissues to be spared are delineated on computed tomography (CT) scans in the planning process. Computer-assisted design of the radiation dose distribution ensures that the objectives for target coverage and avoidance of healthy tissue are achieved. The radiation treatment units are now recognized as state-of-the-art robotics capable of three-dimensional soft tissue imaging immediately before, during, or after radiation delivery, improving the localization of the target at the time of radiation delivery, to ensure that radiation therapy is delivered as planned. Frequent imaging in the treatment room during a course of radiation therapy, with decisions made on the basis of imaging, is referred to as image-guided radiation therapy (IGRT). IGRT allows changes in tumor position, size, and shape to be measured during the course of therapy, with adjustments made to maximize the geometric accuracy and precision of radiation delivery, reducing the volume of healthy tissue irradiated and permitting dose escalation to the tumor. These geometric advantages increase the chance of tumor control, reduce the risk of toxicity after radiotherapy, and facilitate the development of shorter radiotherapy schedules. By reducing the variability in delivered doses across a population of patients, IGRT should also improve interpretation of future clinical trials.

Download Full-text

Impact of Peer Review in the Radiation Treatment Planning Process: Experience of a Tertiary Care University Hospital in Pakistan

Journal of Global Oncology ◽

10.1200/jgo.19.00039 ◽

2019 ◽

pp. 1-7

Author(s):

Bilal Mazhar Qureshi ◽

Muhammad Atif Mansha ◽

Muneeb Uddin Karim ◽

Asim Hafiz ◽

Nasir Ali ◽

...

Keyword(s):

Radiation Therapy ◽

Peer Review ◽

Clinical Target Volume ◽

Planning Process ◽

Radiation Treatment ◽

Tertiary Care ◽

Major Change ◽

Target Volume ◽

University Hospital ◽

Treatment Plans

PURPOSE To evaluate and report the frequency of changes in radiation therapy treatment plans after peer review in a simulation review meeting once a week. MATERIALS AND METHODS Between July 1 and August 31, 2016, the radiation plans of 116 patients were discussed in departmental simulation review meetings. All plans were finalized by the primary radiation oncologist before presenting them in the meeting. A team of radiation oncologists reviewed each plan, and their suggestions were documented as no change, major change, minor change, or missing contour. Changes were further classified as changes in clinical target volume, treatment field, or dose. All recommendations were stratified on the basis of treatment intent, site, and technique. Data were analyzed by Statistical Package for the Social Sciences and are presented descriptively. RESULTS Out of 116 plans, 26 (22.4%) were recommended for changes. Minor changes were suggested in 15 treatment plans (12.9%) and a major change in 10 (8.6%), and only one plan was suggested for missing contour. The frequency of change recommendations was greater in radical radiation plans than in palliative plans (92.3% v 7.7%). The head and neck was the most common treatment site recommended for any changes (42.3%). Most of the changes were recommended in the technique planned with three-dimensional conformal radiation therapy (50%). Clinical target volume (73.1%) was identified as the most frequent parameter suggested for any change, followed by treatment field (19.2%) and dose (0.08%). CONCLUSION Peer review is an important tool that can be used to overcome deficiencies in radiation treatment plans, with a goal of improved and individualized patient care. Our study reports changes in up to a quarter of radiotherapy plans.

Download Full-text