Journal article
Assessment of knee instability in ACL-injured knees using weight-bearing computed tomography (WBCT): a novel protocol and preliminary results
Skeletal radiology, Vol.53(8), pp.1611-1619
08/01/2024
DOI: 10.1007/s00256-024-04562-1
PMID: 38185734
Abstract
ObjectiveTo propose a protocol for assessing knee instability in ACL-injured knees using weight-bearing computed tomography (WBCT).Materials and methodsWe enrolled five patients with unilateral chronic ACL tears referred for WBCT. Bilateral images were obtained in four positions: bilateral knee extension, bilateral knee flexion, single-leg stance with knee flexion and external rotation, and single-leg stance with knee flexion and internal rotation. The radiation dose, time for protocol acquisition, and patients' tolerance of the procedure were recorded. A blinded senior radiologist assessed image quality and measured the anterior tibial translation (ATT) and femorotibial rotation (FTR) angle in the ACL-deficient and contralateral healthy knee.ResultsAll five patients were male, aged 23-30 years old. The protocol resulted in a 16.2 mGy radiation dose and a 15-min acquisition time. The procedure was well-tolerated, and patient positioning was uneventful, providing good-quality images. In all positions, the mean ATT and FTR were greater in ACL-deficient knees versus the healthy knee, with more pronounced differences observed in the bilateral knee flexion position. Mean lateral ATT in the flexion position was 9.1 +/- 2.8 cm in the ACL-injured knees versus 4.0 +/- 1.8 cm in non-injured knees, and mean FTR angle in the bilateral flexion position was 13.5 degrees +/- 7.7 and 8.6 degrees +/- 4.6 in the injured and non-injured knees, respectively.ConclusionOur protocol quantitatively assesses knee instability with WBCT, measuring ATT and FTR in diverse knee positions. It employs reasonable radiation, is fast, well-tolerated, and yields high-quality images. Preliminary findings suggest ACL-deficient knees show elevated ATT and FTR, particularly in the 30 degrees flexion position.
Details
- Title: Subtitle
- Assessment of knee instability in ACL-injured knees using weight-bearing computed tomography (WBCT): a novel protocol and preliminary results
- Creators
- Renata Vidal Leao - Hospital Sírio-LibanêsSandro Ricardo Benites Zelada - Universidade de São PauloCarlos Felipe Teixeira Lobo - Hospital Sírio-LibanêsAndre Giardino Moreira da Silva - Universidade de São PauloAlexandre Leme Godoy-Santos - Universidade de São PauloRiccardo Gomes Gobbi - Universidade de São PauloPaulo Victor Partezani Helito - Qatar Orthopaedic and Sports Medicine HospitalCamilo Partezani Helito - Universidade de São Paulo
- Resource Type
- Journal article
- Publication Details
- Skeletal radiology, Vol.53(8), pp.1611-1619
- DOI
- 10.1007/s00256-024-04562-1
- PMID
- 38185734
- NLM abbreviation
- Skeletal Radiol
- ISSN
- 0364-2348
- eISSN
- 1432-2161
- Publisher
- Springer Nature
- Number of pages
- 9
- Language
- English
- Date published
- 08/01/2024
- Academic Unit
- Radiology
- Record Identifier
- 9984697730202771
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