Usefulness of black boundary artifact on opposed-phase imaging from turbo spin-echo two-point mDixon MRI for delineation of an arthroscopically confirmed small fracture of the lateral talar dome: A case report
| Autor: | Eun Hae Park, Kwang-Bok Lee |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
Male
Boundary (topology) 030218 nuclear medicine & medical imaging Talus 03 medical and health sciences Dome (geology) Arthroscopy Fractures Bone 0302 clinical medicine Nuclear magnetic resonance Image Interpretation Computer-Assisted ankle Medicine Humans Point (geometry) Clinical Case Report Range of Motion Articular Artifact (error) Dixon MRI business.industry General Medicine Fast spin echo Middle Aged Magnetic Resonance Imaging fracture Phase imaging Fracture (geology) Chip fracture business 030217 neurology & neurosurgery Research Article black boundary artifact |
| Zdroj: | Medicine |
| ISSN: | 1536-5964 |
| Popis: | Rationale: A nondisplaced chip fracture can be missed on MRI. Opposed-phase imaging from mDixon MRI produces an interesting artifact called black boundary artifact. This artifact can provide better contrast at the fracture line resulting in better depiction of a small chip fracture on MRI. Patient concerns: We present a case of small nondisplaced chip fracture at the lateral talar dome that was well delineated only with the aid of a black boundary artifact after using T2-weighted opposed-phase imaging from turbo spin-echo two-point modified Dixon ankle MRI. In other sequences, the lesion demonstrated a focal full thickness cartilage defect, subtle cortical irregularity, or subcortical bone marrow edema but the full delineation of the fracture line was not possible. Diagnoses: Opposed-phase imaging from mDixon MRI aided in the diagnosis of lateral talar dome osteochondral fracture (osteochondral lesion), which was confirmed arthroscopically. Interventions: The osteochondral fragment was removed by arthroscopy. Outcomes: The patient did well with recovery of full range of motion after 2 months. Lessons: We have identified a black boundary artifact using opposed-phase imaging from mDixon MRI that can aid in detection of small fracture, which can be missed by conventional MRI, by providing a dark linear signal at the fracture line. |
| Databáze: | OpenAIRE |
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