Dec 7, 2019

MRIgRT Head and Neck Anthropomorphic QA Phantom: Design, Development, Reproducibility and Feasibility Study

Medical Physics
Angela SteinmannDavid S Followill


The purpose of this paper was to design, manufacture, and evaluate a tissue equivalent, dual MR/CT visible anthropomorphic Head and Neck (H&N) phantom. This phantom was specially designed as an end-to-end quality assurance (QA) tool for magnetic resonance (MR) imaging guided radiotherapy (MRIgRT) systems participating in NCI-sponsored clinical trials. The MRIgRT H&N phantom was constructed using a water-fillable acrylic shell and a custom insert that mimics an organ at risk (OAR) and target structures. The insert consists of a primary and secondary PTV manufactured of a synthetic Clear Ballistic gel, an acrylic OAR and surrounding tissue fabricated using melted Superflab. Radiochromic EBT3 film and TLDs were used to measure the dose distribution and absolute dose, respectively. The phantom was evaluated by conducting an end-to-end test that included: imaging on a GE Lightspeed CT simulator, planning on Monaco treatment planning software (TPS), verifying treatment setup with MR and irradiating on Elekta's 1.5T Unity MR linac system. The phantom was irradiated three times using the same plan to determine reproducibility. Three institutions, equipped with either ViewRay MRIdian 60 Co or ViewRay MRIdian Linac, were used to conduct ...Continue Reading

  • References20
  • Citations


  • This paper may not have been cited yet.

Mentioned in this Paper

Computer Software
Radiosurgery, Linear Accelerator
Magnetic Resonance Imaging
Acrylic Dental Material
Cardiovascular Risk Factor
GG2-1 protein, human
Clinic/Center - Oncology, Radiation

Related Feeds

Cardiovascular Diseases: Risk Factors

Cardiovascular disease is a significant health concern. Risk factors include hypertension, obesity, dyslipidemia and smoking. Women who are postmenopausal are at an increased risk of heart disease. Here is the latest research for risk factors of cardiovascular disease.

Cardiovascular Risk Prediction

Cardiovascular risk prediction models based on classical risk factors identified in epidemiological studies are useful in primary prevention of cardiovascular disease in individuals. Here is the latest research.