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X-Ray CT Physics and Reconstruction Engineer
X-Ray CT Physics and Reconstruction EngineerViewRay Systems, Inc. • Cleveland, OH, United States
X-Ray CT Physics and Reconstruction Engineer

X-Ray CT Physics and Reconstruction Engineer

ViewRay Systems, Inc. • Cleveland, OH, United States
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About ViewRay® Systems

ViewRay Systems, Inc. is a private technology company seeking to provide the global radiation therapy community with advanced medical instruments incorporating the highest level of technology possible. Our belief is that only significant technological innovation can enable society to conquer disease. Our mission is to dare to change the paradigms of medicine and solve “impossible” technical problems to enable clinicians to effect a cure to save precious human lives, mitigate pain and suffering, and enhance quality of life. Our vision is to become the world’s leader in producing highly-effective innovative technology to cure cancer.

ViewRay Systems designs, manufactures, and markets the MRIdian A3i® radiation therapy system to treat cancer patients with the smallest radiation therapy margins available with the highest patient throughput demonstrated for the most complicated cases The system treats by aligning the sharpest radiation therapy beam on the market to diagnostic quality magnetic resonance images (MRIs) of the patient, adapts the treatment plan to the reality of the patient, and then uses the real-time MRIs to control the beam and record real-time doses delivered to the patient.

Job Description

We are seeking a highly motivated Scientist with expertise in X-Ray Computed Tomography (CT) to develop and optimize advanced algorithms for data collection, correction, and image reconstruction. The successful candidate will join a multidisciplinary R&D team working at the intersection of physics, imaging science, and computational algorithms, to advance next-generation CT systems for radiotherapy applications. The candidate will share our passion for conquering cancer and help us support Radiation Therapy systems worldwide.

Responsibilities :

  • Algorithm Development
  • Design, implement, and validate algorithms for projection data correction, including scatter, beam-hardening, detector response, and motion artifacts.
  • Develop high-performance reconstruction algorithms (e.g., filtered backprojection, iterative, statistical, and model-based methods).
  • Implement noise and artifact reduction techniques.
  • System Modeling & Calibration
  • Model X-ray source, detector, and system geometry for accurate forward and inverse problem formulation.
  • Calibrate detector gain, offset, and spectral response.
  • Optimization & Performance
  • Accelerate reconstruction and correction routines using GPU, multi-core CPU, or distributed computing architectures.
  • Develop simulation tools and synthetic phantoms to evaluate algorithm accuracy and robustness.
  • Collaboration & Validation
  • Collaborate with physicists, software engineers, and hardware teams to integrate algorithms into real-time data pipelines.
  • Analyze phantom and clinical datasets to validate algorithmic performance and ensure regulatory compliance (e.g., FDA / CE).

Required Qualifications

  • M.S or Ph.D. in Physics / Electrical Engineering / Biomedical Physics / Biomedical Engineering, or related field.
  • Strong background in computed tomography, inverse problems, or medical imaging physics.
  • Proficiency in C++, Python, or MATLAB, with experience implementing high-performance numerical algorithms.
  • Solid understanding of linear algebra, optimization, and numerical methods.
  • Familiarity with cone-beam geometry, Radon transform, projection / backprojection, and statistical reconstruction (e.g., SIRT, MLEM, FBP, iterative)
  • Skilled in MS office software applications (PowerPoint, Word, Excel).

    • Valued Qualifications

  • Desire and bandwidth to expand to other disciplines.
  • MRI imaging experience.
  • Experience with photon counting technology.

    • Job Type : Full-time

    Work Location :

    In person in Cleveland, OH : Relocate before starting work

    Benefits :

  • Health, dental, and vision insurance
  • Paid time off and flexible schedule
  • Office stocked with snacks, drinks, and occasional catered meals

    • Email inquiries to careers@viewraysystems.com

    ViewRay Systems, Inc. is an Equal Opportunity Employer and does not discriminate on the basis of race, religion, color, creed, national origin, gender, age, sexual orientation, status as a protected disabled or Vietnam Era Veteran, disability, or any other legally protected status.

    Reference :

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    Ct Xray • Cleveland, OH, United States