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Clinical Trial Details — Status: Terminated

Administrative data

NCT number NCT04095091
Other study ID # 2017-0684
Secondary ID R01CA190298-01A1
Status Terminated
Phase
First received
Last updated
Start date September 14, 2017
Est. completion date October 4, 2019

Study information

Verified date October 2023
Source University of Wisconsin, Madison
Contact n/a
Is FDA regulated No
Health authority
Study type Observational

Clinical Trial Summary

The primary objective of this protocol is to evaluate the feasibility of acquiring simultaneous 4D ultrasound and 4D MRI scans. The imaging performance of the US and MRI scans will be characterized. The secondary objective of this study is to determine if several salient features identified in the US scan can be used to predict target motion identified in the MR scan.


Description:

The goal of radiotherapy treatment of cancer is to cure or locally control the disease while minimizing complications to healthy tissue. Given the complexity of tumor and normal tissue response to radiation, precise and accurate delivery of absorbed dose distributions, within known tolerances, is necessary to achieve the maximum therapeutic ratio. The complex treatment process of radiotherapy introduces geometrical uncertainties including respiratory induced tumor motion. The goal of this research is to develop and validate a novel image-guidance technique to directly track tumor motion using a 4-dimensional (4D) planar ultrasound (US) transducer during radiation therapy that is coupled to a pre-treatment calibration training image set consisting of a simultaneous 4D ultrasound and 4D magnetic resonance imaging (MRI) acquisition. The image sets will be rapidly matched using advanced image and signal processing algorithms, allowing the display of virtual MR images of the tumor/organ motion in real-time from an ultrasound acquisition.


Recruitment information / eligibility

Status Terminated
Enrollment 30
Est. completion date October 4, 2019
Est. primary completion date October 4, 2019
Accepts healthy volunteers Accepts Healthy Volunteers
Gender All
Age group 18 Years and older
Eligibility Inclusion Criteria (Healthy Volunteers): - Must be eighteen (18) years of age or older. - Must be able to provide informed consent. Inclusion Criteria (Patients): - Patients diagnosed with malignancies of the liver. Exclusion Criteria (All): - Under the age of eighteen (18) years. - BMI exceeds the size of the bore of the MRI scanner. - Unable or unwilling to provide informed consent. - Contraindications, as described in the volunteer consent form, to MR or US scanning such as but not limited to accidental or implanted ferrous metal and/or implanted devices whose function can be disturbed by the main magnetic field, gradient magnetic fields, or radiofrequency energy. - Women who are pregnant, suspect they might be pregnant or breastfeeding.

Study Design


Related Conditions & MeSH terms


Intervention

Device:
4D Planar US Transducer
This 4D planar US transducer is being developed and validated to provide a novel image-guidance technique to directly track tumor motion during radiation therapy that is coupled to a pre-treatment calibration training image set consisting of a simultaneous 4D ultrasound and 4D magnetic resonance imaging (MRI) acquisition.

Locations

Country Name City State
United States University of Wisconsin, Madison Madison Wisconsin

Sponsors (3)

Lead Sponsor Collaborator
University of Wisconsin, Madison National Cancer Institute (NCI), National Institutes of Health (NIH)

Country where clinical trial is conducted

United States, 

Outcome

Type Measure Description Time frame Safety issue
Primary Feasibility testing To conduct non-contrast agent MR and ultrasound scans in order to evaluate and demonstrate, on a continuing basis, the technical and clinical feasibility of new or modified features (the "Prototype") of a combined MRI and ultrasound system, and software. Prototype MRI and ultrasound systems are defined as components of the MRI system (software) and ultrasound system (hardware and software) that have been modified in some form. 12 Months
Primary MR/US Motion Management Platform The goal of this trial is to assess the feasibility of implementing the system into clinical practice and to compare the dosimetric advantages of its use. In a retrospective analysis, the patients' standard treatment plan with international target volume (ITV) expansion will be directly compared with a second treatment plan using a smaller respiratory-gated margin (i.e., gross tumor volume (GTV)-only expanded for planning target volume (PTV) without ITV expansion). Normal tissue constraints will be specified and follow standard clinical constraints. The percent of liver volume receiving greater than 18 Gy will be used as a quantitative metric to assess the dosimetric impact of our platform. In addition, overall treatment time with the relative "beam on time" and duty cycle will also be compared. Additionally, the ultrasound acquisition during treatment will be used to assess intra- and interfraction changes in breathing patterns as the patients progress through treatment. 12 Months
Secondary Accuracy of image-guidance technique The accuracy of our image-guidance technique will be done by showing that several salient features identified in the US scan can be used to predict/model target motion identified in the MR scan. In this context the target will be a large easily identifiable structure in the test subject (e.g. cyst, vessel). MRI and ultrasound images will be acquired simultaneously such that the motion of tissues or organs in the body can be effectively tracked as a function of respiratory state in the subject. In this manner, the ultrasound system will allow real-time tracking of salient features in the patient that are indicative of the respiratory state. 12 Months
Secondary Test/re-test A secondary objective of this substudy is to evaluate the accuracy of probe re-position during subsequent treatment sessions (i.e. test/re-test) in cancer patient subjects. The probe will be positioned during one of the patient subjects and images will be acquired. During a subsequent treatment session the probe will be re-positioned and images will be acquired. The image data will be used to evaluate to measure the concordance between the two datasets. 12 Months
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