CT Mar Technology and MR Mavric, Semac Sequence in Removing Artifacts of Orthopedic Metal Internal Fixation

Completed

• Conditions: Spinal Disease
• Interventions: Diagnostic Test: Reduce metal artifacts examination

• Registration Number: NCT04954963
• Lead Sponsor: Peking University Third Hospital

Brief Summary

1. Objective to compare the effect of single energy imaging and mar technology in reducing artifacts of knee and hip replacement, and to explore the appropriate keV range of Mar technology in removing metal artifacts.,2. Objective to compare the effects of different MRI sequences (mavric / semac, stir, ideal, FSE) in removing artifacts of spinal internal fixation, knee and hip replacement.

Detailed Description

Conventional spiral CT \[4\] examination will form black-and-white stripe artifacts around the metal implant, making the display of adjacent important structures unclear. In routine MRI examination \[5\], metal will interfere with the uniformity of local magnetic field, resulting in signal loss, and the artifacts will seriously affect the observation of bone and its surrounding structures.

The purpose of this study was to comprehensively evaluate the effect of Mar technology on reducing metal artifacts after internal fixation and joint replacement, and then to explore the appropriate keV range of Mar technology to reduce metal artifacts. We also aim to compare the reduction effect of different sequences of MRI on internal fixation artifacts after internal fixation and joint replacement, and to explore the sequence suitable for clinical diagnosis and treatment.

Study Timeline

• Status Verified: 2019-12
• Study Start: 2019-12-01
• Primary Completion: 2019-12-01
• Study Completion: 2020-10-30
• Study First Submitted: 2021-06-29
• Study First Submitted QC: 2021-07-01
• Last Update Submitted: 2021-07-01
• Study First Posted: 2021-07-08
• Last Update Posted: 2021-07-08

Recruitment & Eligibility

• Status: COMPLETED
• Sex: All
• Target Recruitment: 50

Inclusion Criteria

• Patients after spinal internal fixation or knee or hip replacement

Read More

Exclusion Criteria

• Patients with poor image quality caused by their own factors such as patients' movement can not meet the diagnostic requirements

Read More

Study & Design

• Study Type: OBSERVATIONAL
• Study Design: Not specified

Arm && Interventions

Group	Intervention	Description
Reduce metal artifacts examination	Reduce metal artifacts examination	patients undergo reduce metal artifacts examination

Primary Outcome Measures

Name	Time	Method
Artifact index	2020.10.15-2020.10.30	AI in region of interest

Trial Locations

Locations (1)

Peking University Third Hospital; 🇨🇳 Beijing, Beijing, China