Feasibility Study of CBCT for IGRT in Cancer Patients

March 12, 2026 updated by: Varian, a Siemens Healthineers Company

A Feasibility Study of a Novel Cone-Beam CT Approach for Image Guided Radiotherapy in Cancer Patients

Cone beam computed tomography (CBCT) is an imaging technology that is incorporated into many modern radiation therapy systems. The quality of conventional CBCT is good enough to align patients for their daily radiation therapy but CBCT images have poor contrast and are susceptible to imaging artefacts that limit their usability for other tasks in the radiation therapy workflow.

Varian Medical Systems, the sponsor of this study, has developed new CBCT imaging technology called HyperSight that so far has demonstrated increased image quality compared with conventional CBCT images. This new HyperSight CBCT imager has previously been built into Varian Halcyon and Ethos treatment machines, where the imager is enclosed in a ring that rotates around the patient. Now, HyperSight has been built into a Varian treatment machine, called TrueBeam, where the imager is mounted on a C-shaped arm that rotates around you to acquire an image.

This study is being done to evaluate the image quality of HyperSight CBCT compared to conventional CBCT images, and to determine whether HyperSight CBCT can improve the process of delivering radiation treatments.

The goal of this study is to collect images from this new HyperSight-TrueBeam CBCT imager from a variety of patients and locations in the body. The images will be analyzed to determine whether their quality is high enough to use for tasks other than positioning patients for treatment. For example, the study will determine whether the HyperSight images could be used to calculate a radiation plan.

Study Overview

Status

Status

Indicates the current recruitment status or the expanded access status.
Recruiting

Conditions

Conditions

The disease, disorder, syndrome, illness, or injury that is being studied. On ClinicalTrials.gov, conditions may also include other health-related issues, such as lifespan, quality of life, and health risks.

Intervention / Treatment

Intervention / Treatment

A process or action that is the focus of a clinical study. Interventions include drugs, medical devices, procedures, vaccines, and other products that are either investigational or already available. Interventions can also include noninvasive approaches, such as education or modifying diet and exercise.

Study Type

Study Type

Describes the nature of a clinical study. Study types include interventional studies (also called clinical trials), observational studies (including patient registries), and expanded access.
Interventional

Enrollment (Estimated)

Enrollment

The number of participants in a clinical study. The "anticipated" enrollment is the target number of participants that the researchers need for the study.
50

Phase

Phase

The stage of a clinical trial studying a drug or biological product, based on definitions developed by the U.S. Food and Drug Administration (FDA). The phase is based on the study's objective, the number of participants, and other characteristics. There are five phases: Early Phase 1 (formerly listed as Phase 0), Phase 1, Phase 2, Phase 3, and Phase 4. Not Applicable is used to describe trials without FDA-defined phases, including trials of devices or behavioral interventions.
  • Not Applicable

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Contact

Study Contact

The name and contact information for the person who can answer enrollment questions for a clinical study. Each location where the study is being conducted may also have a specific contact, who may be better able to answer those questions.

Study Locations

  • United States
    • Ohio
      • Columbus, Ohio, United States, 43212
        • Recruiting
        • Stefanie Spielman Comprehensive Breast Center
        • Contact:
        • Contact:
        • Principal Investigator:
          • Ashley Cetnar, PhD
      • Columbus, Ohio, United States, 43210
        • Recruiting
        • The Arthur G. James Cancer Hospital and Richard J. Solove Research Institute
        • Contact:
        • Contact:
        • Principal Investigator:
          • Ashley Cetnar, PhD
      • Columbus, Ohio, United States, 43210
        • Recruiting
        • James Outpatient Center
        • Contact:
        • Contact:
        • Principal Investigator:
          • Ashley Cetnar, PhD
      • Columbus, Ohio, United States, 43210
        • Recruiting
        • Ohio State University, Brain and Spine Hospital
        • Contact:
        • Contact:
        • Principal Investigator:
          • Ashley Cetnar, PhD

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Eligibility Criteria

The key requirements that people who want to participate in a clinical study must meet or the characteristics they must have. Eligibility criteria consist of both inclusion criteria (which are required for a person to participate in the study) and exclusion criteria (which prevent a person from participating). Types of eligibility criteria include whether a study accepts healthy volunteers, has age or age group requirements, or is limited by sex.

Ages Eligible for Study

  • Adult
  • Older Adult

Accepts Healthy Volunteers

No

Description

Inclusion Criteria:

  1. Patient age ≥ 18
  2. Patient is receiving radiation therapy for head and neck, thorax, liver, breast, genitourinary, or gastrointestinal malignancies
  3. A CBCT acquisition for localization is standard of care for the radiation therapy treatment plan being delivered

Exclusion Criteria:

  1. Patient has ECOG Performance Status ≥3.
  2. Patient is wheelchair bound.
  3. Patient has a life expectancy <3 months.
  4. Patient is unwilling or unable to provide informed consent to participate in the study.
  5. Patient is pregnant or has plans for pregnancy during the period of treatment.
  6. Patient is part of a vulnerable population (per ISO 14155:2020, "individuals who are unable to fully understand all aspects of the investigation that are relevant to the decision to participate, or who could be manipulated or unduly influenced as a result of a compromised position, expectation of benefits or fear of retaliatory response"). This includes prisoners.

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

  • Primary Purpose: Other
  • Allocation: N/A
  • Interventional Model: Single Group Assignment
  • Masking: None (Open Label)

Arms and Interventions

Participant Group / Arm

Participant Group / Arm

A group or subgroup of participants in a clinical trial that receives a specific intervention/treatment, or no intervention, according to the trial's protocol.
Intervention / Treatment

Intervention / Treatment

A process or action that is the focus of a clinical study. Interventions include drugs, medical devices, procedures, vaccines, and other products that are either investigational or already available. Interventions can also include noninvasive approaches, such as education or modifying diet and exercise.
Experimental: HyperSight Imaging Arm
Device: Comparison of HyperSight CBCT imaging to conventional CBCT imaging.
Participants will receive their daily radiation treatment on a radiation therapy system equipped with HyperSight CBCT imaging. For at least 1 and up to 3 treatment fractions, participants will receive their daily radiation treatment on a system equipped with conventional CBCT imaging.

What is the study measuring?

Primary Outcome Measures

Primary Outcome Measures

In a clinical study's protocol, the planned outcome measure that is the most important for evaluating the effect of an intervention/treatment. Most clinical studies have one primary outcome measure, but some have more than one.
Outcome Measure
Measure Description
Time Frame
Comparison of Image Contrast Resolution
Time Frame: End of radiation treatment at 9 weeks.
The difference in contrast resolution will be evaluated between a standard CBCT image, a CBCT image acquired using HyperSight technology, and a standard fan-beam CT acquired as part of the treatment simulation and planning process
End of radiation treatment at 9 weeks.
Comparison of Image Uniformity
Time Frame: End of radiation treatment at 9 weeks.
The difference in image uniformity will be evaluated between a standard CBCT image, a CBCT image acquired using HyperSight technology, and a standard fan-beam CT acquired as part of the treatment simulation and planning process.
End of radiation treatment at 9 weeks.
Qualitative Image Comparison
Time Frame: End of radiation treatment at 9 weeks.
Qualitative comparison of HyperSight CBCT to conventional CBCT to determine preferred imaging for patient localization for daily treatment. Clinician observers will rank their preference using a 5-point Likert scale, where 1 represents strong preference of one imaging modality and 5 represents strong preference for the other modality.
End of radiation treatment at 9 weeks.

Secondary Outcome Measures

Secondary Outcome Measures

In a clinical study's protocol, a planned outcome measure that is not as important as the primary outcome measure for evaluating the effect of an intervention but is still of interest. Most clinical studies have more than one secondary outcome measure.
Outcome Measure
Measure Description
Time Frame
Reduction of Metal Artifacts
Time Frame: End of radiation treatment at 9 weeks.
In patients with a metal implant in the imaging field, the volume [cubic centimeters] of the metal artefact will be compared between a standard CBCT image, a CBCT image acquired using HyperSight technology, and a standard fan-beam CT acquired as part of the treatment simulation and planning process.
End of radiation treatment at 9 weeks.
Imaging Time for Large Treatment Volumes
Time Frame: End of radiation treatment at 9 weeks.
For participants where multiple conventional CBCTs must be acquired and stitched together to capture the entire treatment field, the time [seconds] required for the overall imaging session will be recorded and compared between HyperSight CBCT and conventional CBCT.
End of radiation treatment at 9 weeks.
Imaging Time for Breath Hold Imaging
Time Frame: End of radiation treatment at 9 weeks.
For participants who undergo breath-hold imaging, the time [seconds] required for the overall imaging session will be recorded and compared between HyperSight CBCT and conventional CBCT.
End of radiation treatment at 9 weeks.
Patient Tolerance of Breath Hold Imaging
Time Frame: End of radiation treatment at 9 weeks.
For participants who undergo breath-hold imaging, the total number of individual breath-holds required for a complete image acquisition will be recorded and compared between HyperSight CBCT and conventional CBCT.
End of radiation treatment at 9 weeks.
Feasibility of HyperSight CBCT for Treatment Planning
Time Frame: End of radiation treatment at 9 weeks.
For anatomical regions where there are limited anatomical deformations expected between image acquisitions, the radiation doses calculated for individual anatomical structures in a participant's treatment plan, which is based on their fan-beam simulation CT, will be compared to doses for the same structures after re-calculating the dose distribution for the same treatment plan using both the HyperSight CBCT and conventional standard CBCT.
End of radiation treatment at 9 weeks.

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

Sponsor

The organization or person who initiates the study and who has authority and control over the study.
Varian, a Siemens Healthineers Company

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start (Actual)

Study Start

The actual date on which the first participant was enrolled in a clinical study. The "anticipated" study start date is the date that the researchers think will be the study start date.
February 19, 2025

Primary Completion (Estimated)

Primary Completion

The date on which the last participant in a clinical study was examined or received an intervention to collect final data for the primary outcome measure. Whether the clinical study ended according to the protocol or was terminated does not affect this date. For clinical studies with more than one primary outcome measure with different completion dates, this term refers to the date on which data collection is completed for all the primary outcome measures. The "anticipated" primary completion date is the date that the researchers think will be the primary completion date for the study.
August 1, 2026

Study Completion (Estimated)

Study Completion

The date on which the last participant in a clinical study was examined or received an intervention/treatment to collect final data for the primary outcome measures, secondary outcome measures, and adverse events (that is, the last participant's last visit). The "anticipated" study completion date is the date that the researchers think will be the study completion date.
September 1, 2026

Study Registration Dates

First Submitted

First Submitted

The date on which the study sponsor or investigator first submitted a study record to ClinicalTrials.gov. There is typically a delay of a few days between the first submitted date and the record's availability on ClinicalTrials.gov (the first posted date).
November 6, 2024

First Submitted That Met QC Criteria

First Submitted That Met QC Criteria

The date on which the study sponsor or investigator first submits a study record that is consistent with National Library of Medicine (NLM) quality control (QC) review criteria. The sponsor or investigator may need to revise and submit a study record one or more times before NLM's QC review criteria are met. It is the responsibility of the sponsor or investigator to ensure that the study record is consistent with the NLM QC review criteria.
November 6, 2024

First Posted (Actual)

First Posted

The date on which the study record was first available on ClinicalTrials.gov after National Library of Medicine (NLM) quality control (QC) review has concluded. There is typically a delay of a few days between the date the study sponsor or investigator submitted the study record and the first posted date.
November 8, 2024

Study Record Updates

Last Update Posted (Actual)

Last Update Posted

The most recent date on which changes to a study record were made available on ClinicalTrials.gov. There may be a delay between when the changes were submitted to ClinicalTrials.gov by the study's sponsor or investigator (the last update submitted date) and the last update posted date.
March 13, 2026

Last Update Submitted That Met QC Criteria

Last Update Submitted That Met QC Criteria

The most recent date on which the study sponsor or investigator submitted changes to a study record that are consistent with National Library of Medicine (NLM) quality control (QC) review criteria. It is the responsibility of the sponsor or investigator to ensure that the study record is consistent with the NLM QC review criteria.
March 12, 2026

Last Verified

Last Verified

The most recent date on which the study sponsor or investigator confirmed the information about a clinical study on ClinicalTrials.gov as accurate and current. If a study with a recruitment status of recruiting; not yet recruiting; or active, not recruiting has not been confirmed within the past 2 years, the study's recruitment status is shown as unknown.
March 1, 2026

More Information

Terms related to this study

Additional Relevant MeSH Terms

Other Study ID Numbers

Other Study ID Numbers

Identifiers or ID numbers other than the NCT number that are assigned to a clinical study by the study's sponsor, funders, or others. These numbers may include unique identifiers from other trial registries and National Institutes of Health grant numbers.
  • VAR-2023-04

Plan for Individual participant data (IPD)

Plan to Share Individual Participant Data (IPD)?

NO

Drug and device information, study documents

Studies a U.S. FDA-regulated drug product

No

Studies a U.S. FDA-regulated device product

Yes

product manufactured in and exported from the U.S.

Yes

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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