AI Article Synopsis
- The study addresses head motion artifacts that affect brain PET imaging and proposes using wired active MR microcoils for motion tracking.
- The authors created an experimental setup using a phantom to simulate brain scans, successfully acquiring PET and MR data while inducing motion.
- Results showed that motion correction using the MR microcoils significantly reduced bias and improved image quality, demonstrating the potential for enhanced brain PET imaging accuracy.
Article Abstract
Purpose: Artifacts caused by head motion present a major challenge in brain positron emission tomography (PET) imaging. The authors investigated the feasibility of using wired active MR microcoils to track head motion and incorporate the measured rigid motion fields into iterative PET reconstruction.
Methods: Several wired active MR microcoils and a dedicated MR coil-tracking sequence were developed. The microcoils were attached to the outer surface of an anthropomorphic(18)F-filled Hoffman phantom to mimic a brain PET scan. Complex rotation/translation motion of the phantom was induced by a balloon, which was connected to a ventilator. PET list-mode and MR tracking data were acquired simultaneously on a PET-MR scanner. The acquired dynamic PET data were reconstructed iteratively with and without motion correction. Additionally, static phantom data were acquired and used as the gold standard.
Results: Motion artifacts in PET images were effectively removed by wired active MR microcoil based motion correction. Motion correction yielded an activity concentration bias ranging from -0.6% to 3.4% as compared to a bias ranging from -25.0% to 16.6% if no motion correction was applied. The contrast recovery values were improved by 37%-156% with motion correction as compared to no motion correction. The image correlation (mean ± standard deviation) between the motion corrected (uncorrected) images of 20 independent noise realizations and static reference was R(2) = 0.978 ± 0.007 (0.588 ± 0.010, respectively).
Conclusions: Wired active MR microcoil based motion correction significantly improves brain PET quantitative accuracy and image contrast.
Download full-text PDF |
Source |
|---|---|
| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3978416 | PMC |
| http://dx.doi.org/10.1118/1.4868457 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
A comparative study of curve flexibility assessment in supine traction, push-prone and push-prone traction radiographs in adolescent idiopathic scoliosis.
Spine Deform
January 2025
Spine Unit, Department of Orthopaedic Surgery, Institute of Orthopedics, Lerdsin Hospital, College of Medicine, Rangsit University, 190 Silom Road, Bangkok, 10500, Thailand.
Study Design: A prospective comparative study.
Objectives: To compare the curve flexibility in adolescent idiopathic scoliosis (AIS) using supine traction push-prone and push-prone traction radiographs and to determine which method is more effective in predicting the postsurgical correction.
Background: Preserving spinal motion is one of the critical objectives in adolescent idiopathic scoliosis (AIS) surgery.
Concomitant Cartilage Procedures With Meniscal Allograft Transplantation Do Not Substantially Alter Failure or Survival Rates Relative to Meniscal Allograft Transplantation Without Cartilage Procedures: A Systematic Review.
Am J Sports Med
January 2025
Department of Orthopaedic Surgery, Rush University Medical Center, Chicago, Illinois, USA.
Background: Timely recognition and addressing of concomitant cartilage damage at the time of meniscal allograft transplantation (MAT) is critical to warrant future success. However, there remains a scarcity of data comparing outcomes between MAT with and without cartilage procedures.
Purpose: To compare patient-reported outcomes and rates of complications, failures, reoperations, and graft survivorship after MAT with concomitant cartilage procedures (MAT/Cart) and MAT without (MAT/NoCart).
Evaluation of tension-band osteosynthesis for cubitus varus deformity in pediatric patients: A retrospective review.
J Hand Microsurg
March 2025
Pham Ngoc Thach University of Medicine, Ho Chi Minh City, Viet Nam.
Purpose: This study aims to evaluate the effectiveness and safety of lateral closing wedge osteotomy with tension-band wire fixation for correcting cubitus varus deformity in pediatric patients. The primary objective was to assess the bone union rate, functional outcomes, and potential complications associated with this surgical approach.
Methods: We conducted a retrospective review of 104 pediatric cases (ages 7-15) with post-traumatic cubitus varus deformity treated between January 2018 and December 2019 at the Pediatric Orthopedic Department.
Combined use of cleft and truncated triangle signs helps improve the preoperative MRI diagnosis of lateral meniscus posterior root tears in patients with ACL injuries.
Knee Surg Sports Traumatol Arthrosc
January 2025
Department of Joint Surgery and Sports Medicine, Graduate School of Medical and Dental Sciences, Institute of Science Tokyo, Tokyo, Japan.
Purpose: This study aimed to investigate whether combining the analysis of different magnetic resonance imaging (MRI) signs enhances the diagnostic accuracy of lateral meniscus posterior root tears (LMPRTs) in patients with anterior cruciate ligament (ACL) injuries. We hypothesised that analysing the cleft, ghost and truncated triangle signs and lateral meniscus extrusion (LME) measurement together would improve the preoperative MRI-based diagnosis of LMPRTs.
Methods: This retrospective study used prospectively collected registry data from two academic centres, including patients undergoing primary or revision ACL reconstruction (ACLR) and LMPRT repair.
Spacer-type tibial osteotomy versus open wedge high tibial osteotomy and unicompartmental knee arthroplasty for Kellgren-Lawrence grade 3-4 medial unicompartmental knee osteoarthritis in patients younger than 65 years.
J Orthop Surg Res
January 2025
Department of Orthopedics, Qingdao Municipal Hospital, 1 Jiaozhou Road, Shinan District, QingDao, Shandong Province, 266399, China.
Background: Spacer-type tibial osteotomy have been proven a novel and effective osteotomy to treat osteoarthritis, while lack of comparison with other surgical methods in younger patients. This study aims to evaluate the short-term clinical outcomes of spacer-type tibial osteotomy versus open wedge high tibial osteotomy (OWHTO) and unicompartmental knee arthroplasty (UKA) for Kellgren-Lawrence (K-L) grade 3-4 osteoarthritis (OA) in patients younger than 65 years.
Methods: This retrospective study analyzed a total of 224 patients with K-L grade 3-4 knee OA treated from March 2018 to November 2020.
Want AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!