Weight-Bearing Tomosynthesis In Evaluation of Foot/AnkIe

University of Washington

Status: Completed

Conditions: Arthritis

Treatments: Device: Digital Tomosynthesis of Foot and Ankle

Study type: Interventional

Funder types: Other

Identifiers

NCT02432170

48992

Details and patient eligibility

About

This study aims to compare digital tomosynthesis with radiography and weight-bearing CT as an imaging technique to assess arthritis in the foot and ankle.

Full description

The overall goal of this study is to improve radiologic evaluation of foot and ankle arthritis. Today's standard of care, radiography, provides limited two-dimensional evaluation of joint alignment, arthritic changes, posttraumatic changes, and congenital deformities due to overlapping bone densities. Evaluation is even more limited in post-surgical patients due to overlapping metallic hardware. Computed tomography (CT), the current problem-solving tool, offers more "level-by-level" three dimensional information, but is fraught with additional cost, additional radiation dose, beam-hardening artifacts from hardware, and the need for additional equipment. Most importantly, patients are not weight-bearing during conventional CT, therefore masking the true extent of malalignment or arthritic joint space narrowing. At the University of Washington, physicians attempt to overcome the last problem by performing simulated weight-bearing CT. The study proposes an alternate solution to this problem using a novel application of an old method, digital tomosynthesis. Specific aims of the study are 1) to compare radiography, tomosynthesis, and simulated-weight bearing CT in their ability to detect foot/ankle malalignment, 2) to compare the abilities of these three modalities to detect arthritis changes such as joint space narrowing, osteophytes, and subchondral cysts, and 3) to compare their abilities to detect bony deformities such as acute fracture, old fracture deformity, or partial fusion (post traumatic or post surgical). Radiographic assessment will be correlated with clinical outcome using clinical notes and functional outcome such as the Lower Extremity Functional Scale (LEFS) questionnaire. Successful results from this initial study will have the potential to change practice paradigm in how to image foot and ankle arthritis.

Enrollment: 47 patients

Sex: All

Ages: 18+ years old

Volunteers: No Healthy Volunteers

Inclusion criteria

1. adult age (18 years or older)
2. clinical orthopedic surgery follow-up notes available at University of Washington
3. ability to complete the Lower Extremity Functional Scale (LEFS) or equivalent questionnaire at the time of the study, a well established survey to test for functional ability in lower extremity

Exclusion criteria

1. inability to use the simulated weight bearing CT machine due to pain
2. prior complete osseous fusion of foot/ankle joints
3. prior total ankle arthroplasty
4. Pregnancy

Trial design

Primary purpose: Diagnostic

Allocation: N/A

Interventional model: Single Group Assignment

Masking: None (Open label)

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47 participants in 1 patient group

Foot/Ankles imaged with tomosynthesis

Experimental group

Description:

Intervention: Digital Tomosynthesis of Foot and Ankle The intervention, digital tomosynthesis of the foot and ankle, will be done on eligible participants. The resulting images will be compared to radiography and weight-bearing CT images from the same participants.

Treatment:

Device: Digital Tomosynthesis of Foot and Ankle